Common sea fox. Fox shark - fighting fox fish

Class - Cartilaginous fishes / subclass - Elasmobranchii fishes / Superorder - Sharks (Selach)

Storystudying

The largest sea fox is the common sea fox (Alopias vulpinus), its size is 5.5-6 meters, and can be found in coastal areas. The smallest pelagic fox shark (Alopias pelagicus), measuring about 3 meters, lives in the depths away from the shore. The color is a beautiful dark blue with a whitish belly. It has smooth, wide pectoral fins. The eyes are larger than those of a common fox, but not as large as those of a big-eyed fox. The most “beautiful” big-eyed fox shark (Alopias superciliosus) has unnaturally large bulging eyes. And all representatives of this family have in common the possession of a magnificent fox tail.

Spreading

These sharks can be found near California and in parts of the Indian and Pacific Oceans.

The pelagic fox shark (Alopias pelagicus) lives in the Pacific and Indian Oceans. It can also be found off the coast of China, Taiwan, Western Australia and many other countries.

Externalview

Adult fox sharks measure about 4.7 meters and weigh about 360 kilograms. Outwardly, these sharks are distinguished by their huge eyes, which is typical for individuals that live in dark places.

Structural features

fox shark has a very long upper lobe of the caudal fin, reaching the length of the entire body.

Reproduction

Fox sharks are viviparous. Adult females are capable of giving birth to no more than two sharks. Newborn individuals measure about 1.5 meters. With a body length of about 4 meters, fox sharks reach sexual maturity.

Lifestyle

When hunting, this shark uses its long tail as its main weapon. Approaching a school of fish, the sea fox begins to circle around it, foaming the water with whip-like blows of the caudal fin. Gradually the circles become smaller and smaller, and the frightened fish gather in an increasingly compact group. It is then that the shark begins to greedily swallow its prey. Sometimes a pair of sea foxes takes part in such a hunt. In some cases, the sea fox acts with its tail fin as a flail, using it to stun its prey.


Nutrition

The main food of fox sharks is small fish and shellfish. The fox shark (Alopias vulpinus) has a rather long upper part of the caudal fin. It has dimensions comparable to the body size of a shark. The fox shark hunts with the help of its fin. She wedges herself into a school of fish and begins to beat her tail in different directions, stunning the fish. She then slowly eats her prey. Large individuals often attack even dolphins.

Number

Fortunately, it has no commercial value, does not like to settle on the coast, has formidable weapon And big sizes– all this greatly helps her not to end up in the Red Book.


Fox shark and man

Fox sharks are completely harmless to humans, but when divers dive, they circle around him, although they do not attack. However, there is information that these individuals attacked boats.

waters, although they prefer cool temperatures. They are found both in the open ocean at a depth of up to 550 m and near the coast and usually stay in the surface layers of water. Fox sharks make seasonal migrations and spend the summer at lower latitudes.

The diet mainly consists of schooling pelagic fish. Fox sharks hunt using their long tail as a whip. They knock down, drive and stun their prey, this explains their English name. thresher shark, which literally translates to “thresher shark.” These are powerful and fast predators, capable of jumping completely out of the water. Their circulatory system modified in such a way as to maintain metabolic thermal energy and heat the body above the temperature of the surrounding water. Reproduction occurs by placental viviparity. There are up to 4 newborns in a litter.

Despite their large size, fox sharks are not believed to pose a danger to humans because they are shy and have small teeth. This species is subject to commercial fishing and sport fishing. Their meat and fins are highly prized. Low reproductive rates make common sea foxes very susceptible to overfishing.

Taxonomy



Megachasmidae



Alopiidae

Alopias vulpinus




undescribed species Alopias sp.











The species was first scientifically described as Squalus vulpinus in 1788 by the French naturalist Pierre Joseph Bonnaterre. In 1810, Constantin Samuel Rafinesque described Alopias macrourus based on an individual caught off the coast of Sicily. Later authors recognized the existence of a separate genus of fox sharks and synonymized Alopias macrourus And Squalus vulpinus. Thus, the scientific name of the fox shark became Alopias vulpinus .

The generic and specific names come respectively from the Greek words. ἀλώπηξ and lat. vulpes, each meaning "fox". In old sources this type sometimes called Alopias vulpes .

Morphological and allozyme analysis revealed that the fox shark is a basal member of a clade that also includes the bigeye and pelagic fox sharks. The possibility of the existence of a fourth, hitherto undescribed species, belonging to the genus of fox sharks and most closely related Alopias vulpinus, was rejected after allozyme analysis carried out in 1995.

Area

The common sea fox's range spans temperate and tropical waters throughout the world. In the western Atlantic, they are distributed from Newfoundland to the Gulf of Mexico, although they appear rarely off New England, and from Venezuela to Argentina. In the eastern Atlantic Ocean, they range from the North Sea and the British Isles to Ghana, including Madeira, the Azores and the Mediterranean Sea, and from Angola to South Africa. In the Indo-Pacific region, fox sharks are found from Tanzania to India, the Maldives, off the coasts of Japan, Korea, southeast China, Sumatra, the east coast of Australia and New Zealand. They are also found around numerous Pacific islands, including New Caledonia, Society Islands, Tabuaeran and Hawaii. In the eastern Pacific Ocean, they have been recorded in coastal waters from British Columbia to Chile, including the Gulf of California.

Fox sharks make seasonal migrations, moving to high latitudes following the masses warm water. In the eastern Pacific, males make longer migrations than females in late summer and early fall, reaching Vancouver Island. Young sharks prefer to stay in natural nurseries. There are probably separate populations with different life cycles in the eastern Pacific and western Indian Oceans. There are no interoceanic migrations. In the northwestern Indian Ocean, territorial and vertical sex segregation is observed from January to May, when offspring are born. Mitochondrial DNA analysis has revealed significant regional genetic variation among fox sharks living in different oceans. This fact confirms the hypothesis that sharks from different habitats, despite migrations, do not interbreed.

Although fox sharks are sometimes seen in the coastal zone, they are primarily pelagic and prefer to stay in the open sea, going down to depths of 550 m. Juvenile sharks are more often found in shallow waters close to the shore.

Description

A characteristic feature of fox sharks is the highly elongated upper lobe of the caudal fin, the length of which can be equal to the length of the body. Common sea foxes are active predators; with the help of their tail they are able to stun the prey. They have a strong, torpedo-shaped body and a short, wide head with a conical, pointed snout. There are 5 pairs of short gill slits, with the last two slits located above the long and narrow pectoral fins. The mouth is small, curved in the form of an arch. There are 32-53 upper and 25-50 lower rows of teeth in the mouth. The teeth are small, without serrations. The eyes are small. The third eyelid is missing.
The long, sickle-shaped pectoral fins taper to narrow, pointed tips. The first dorsal fin is quite high and located closer to the base of the pectoral fins. Pelvic fins approximately the same size as the first dorsal fin; males have thin, long pterygopodia. The second dorsal and anal fins are tiny. In front of the caudal fin there are dorsal and ventral crescent-shaped notches. At the edge of the upper lobe there is a small ventral notch. The lower lobe is short but developed.

The skin of fox sharks is covered with small, overlapping placoid scales, each of which bears 3 ridges. The posterior edge of the scales ends in 3-5 marginal teeth. The color of the dorsal surface of the body ranges from metallic lilac-brown to gray, the sides are bluish, and the belly is white. The white coloration extends to the base of the pectoral and pelvic fins - this distinguishes fox sharks from similar pelagic fox sharks, which do not have spots at the base of the fins. Possible white edging on the tips of the pectoral fins.

Common sea foxes are the most major representative family, they reach a length of 7.6 m and a weight of 510 kg.

Biology

Nutrition

97% of the common sea fox's diet consists of bony fish, mostly small and schooling fish such as bluefish, mackerel, herring, garfish and lanternfish. Before attacking, sharks circle around the school and compact it with blows of their tail. They sometimes hunt in pairs or small groups. In addition, large solitary fish, such as sawtooths, as well as squid and other pelagic invertebrates, can become their prey. Off the coast of California they hunt mainly for the Californian anchovy Engraulis mordax, Oregon hake Merluccius productus, Peruvian sardine, Japanese mackerel, squid Loligo opalescens and crab Pleuroncodes planipes. During cold oceanographic regimes, the composition of their diet is poorer, while during periods of warming, the food spectrum expands.

There are numerous reports of fox sharks using the upper blade of their caudal fin to kill prey. Repeated cases have been recorded when they caught their tail on a tier while making a strike. In July 1914, Russell J. Coles witnessed a common sea fox flicking its tail to send its prey into its mouth, and if it missed, the fish would fly off a considerable distance. On April 14, 1923, oceanographer W. E. Allen, standing on a pier, heard a loud splash nearby and saw a swirl of water 100 meters away that could have been caused by a diving sea lion. A moment later, a meter-long flat tail rose above the surface of the water. Next, the scientist observed how fox sharks chased California silver smelt Atherinopsis californiensis. Having overtaken the prey, she lashed it with her tail, like a coachman's whip, and seriously injured her. In the winter of 1865, Irish ichthyologist Harry Blake-Knox observed a common sea fox in Dublin Bay lashing its tail at a wounded loon (possibly a black-billed loon), which it then swallowed. The credibility of the Blake-Knox report has subsequently been questioned on the grounds that the fox shark's tail is not stiff or muscular enough to deliver such a blow.

Life cycle

Fox sharks reproduce by ovoviviparity. Mating occurs in the summer, usually in July and August, and childbirth occurs from March to June. Pregnancy lasts 9 months. Fertilization and development of embryos occurs in utero. After the yolk sac is empty, the embryo begins to feed on unfertilized eggs (intrauterine oophagy). Fetal teeth are peg-shaped and non-functional because they are covered with soft tissue. As they develop, they become more and more similar in shape to the teeth of adult sharks and “erupt” shortly before birth. In the eastern Pacific, litter size ranges from 2 to 4 (rarely 6) newborns, and in the eastern Atlantic - from 3 to 7.

The length of newborns is 114-160 cm and directly depends on the size of the mother. Young sharks gain 50 cm per year, while adults grow only 10 cm. The age at which they reach sexual maturity depends on the habitat. In the northeastern Pacific, males mature at a length of 3.3 m, corresponding to an age of 5 years, and females at a length of 2.6-4.5, corresponding to an age of 7 years. Life expectancy is at least 15 years, and the maximum lifespan is about 45-50 years.

Human interaction

Despite their large size, sea foxes are considered not to be dangerous. They are shy and immediately swim away when a person appears. Divers testify that they are difficult to approach. The International Shark Attack File records one provoked fox shark attack on a person and four attacks on boats, possibly by hooked sharks. There are unconfirmed reports of an attack on a harpooner off the coast of New Zealand.
The famous sports fisherman Frank Mandas in his book "Sportsfishing for Sharks" retold old story. One unfortunate fisherman leaned over the side of the boat to look at big fish, who caught his hook. At the same moment, he was decapitated by a blow from the tail of a five-meter fox shark. The fisherman's body overturned into the boat, and his head fell into the water and could not be found. Most authors consider this story unreliable.

Common sea foxes are commercially fished in Japan, Spain, USA, Brazil, Uruguay, Mexico and Taiwan. They are caught using longlines, pelagic and gill nets. The meat, especially the fins, is highly prized. It is consumed fresh, dried, salted and smoked. The skin is tanned and vitamins are produced from liver fat.

In the United States, commercial fishing for fox sharks using floating gillnets off the coast of South Carolina has developed since 1977. The fishery began with 10 vessels using large mesh nets. Within 2 years, the fleet already numbered 40 ships. The peak was in 1982, when 228 vessels caught 1,091 tons of fox sharks. After that, their numbers sharply decreased due to overfishing, and in the late 80s, production dropped to 300 tons, large individuals were no longer caught. Fox sharks are still caught in the United States, with 80% of the catch coming from Pacific Ocean, and 15% in the Atlantic. The largest catch of fox sharks continues to be gillnetting off the coasts of California and Oregon, although the more valuable swordfish are the main fish there. Xiphius gladius, and fox sharks are caught as bycatch. Small numbers of these sharks are harvested in the Pacific Ocean using harpoons, fine-mesh drift nets and longlines. In the Atlantic, fox sharks are more often caught as bycatch in swordfish and tuna fisheries.

Due to their low fertility, members of the fox shark genus are highly susceptible to overfishing. Between 1986 and 2000, according to an analysis of pelagic longline catches, the abundance of fox sharks and bigeye fox sharks in the northwest Atlantic declined by 80%.

Fox sharks are valued by sports fishermen on a par with mako sharks. They are caught on a fishing rod with a baitcasting reel. Bait is used as bait.

Since the 1990s, there has been a restriction on the hunting of fox sharks in the United States. It is prohibited by law to cut off the fins of live sharks by throwing the carcass overboard. There is a ban on the use of drift nets in the Mediterranean, but poachers illegally use nets up to 1.6 km long to fish for swordfish. The International Union for Conservation of Nature has listed this species as Vulnerable.

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Notes

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Links

  • akyla.info/vidy_lis/4.html
  • Species in the World Register of Marine Species ( World Register of Marine Species) (English)

An excerpt characterizing the common sea fox

But despite this, that evening Natasha, sometimes excited, sometimes frightened, with fixed eyes, lay for a long time in her mother’s bed. Either she told her how he praised her, then how he said that he would go abroad, then how he asked where they would live this summer, then how he asked her about Boris.
- But this, this... has never happened to me! - she said. “Only I’m scared in front of him, I’m always scared in front of him, what does that mean?” That means it's real, right? Mom, are you sleeping?
“No, my soul, I’m scared myself,” answered the mother. - Go.
- I won’t sleep anyway. What nonsense is it to sleep? Mom, mom, this has never happened to me! - she said with surprise and fear at the feeling that she recognized in herself. – And could we think!...
It seemed to Natasha that even when she first saw Prince Andrey in Otradnoye, she fell in love with him. She seemed to be frightened by this strange, unexpected happiness, that the one whom she had chosen back then (she was firmly convinced of this), that the same one had now met her again, and, it seemed, was not indifferent to her. “And he had to come to St. Petersburg on purpose now that we are here. And we had to meet at this ball. It's all fate. It is clear that this is fate, that all this was leading to this. Even then, as soon as I saw him, I felt something special.”
- What else did he tell you? What verses are these? Read... - the mother said thoughtfully, asking about the poems that Prince Andrei wrote in Natasha’s album.
“Mom, isn’t it a shame that he’s a widower?”
- That's enough, Natasha. Pray to God. Les Marieiages se font dans les cieux. [Marriages are made in heaven.]
- Darling, mother, how I love you, how good it makes me feel! – Natasha shouted, crying tears of happiness and excitement and hugging her mother.
At the same time, Prince Andrei was sitting with Pierre and telling him about his love for Natasha and his firm intention to marry her.

On this day, Countess Elena Vasilyevna had a reception, there was a French envoy, there was a prince, who had recently become a frequent visitor to the countess’s house, and many brilliant ladies and men. Pierre was downstairs, walked through the halls, and amazed all the guests with his concentrated, absent-minded and gloomy appearance.
Since the time of the ball, Pierre had felt the approaching attacks of hypochondria and with desperate effort tried to fight against them. From the time the prince became close to his wife, Pierre was unexpectedly granted a chamberlain, and from that time on he began to feel heaviness and shame in large society, and more often the old gloomy thoughts about the futility of everything human began to come to him. At the same time, the feeling he noticed between Natasha, whom he protected, and Prince Andrei, the contrast between his position and the position of his friend, further intensified this gloomy mood. He equally tried to avoid thoughts about his wife and about Natasha and Prince Andrei. Again everything seemed insignificant to him in comparison with eternity, again the question presented itself: “why?” And he forced himself to work day and night on Masonic works, hoping to ward off the approach evil spirit. Pierre, at 12 o'clock, having left the countess's chambers, was sitting upstairs in a smoky, low room, in a worn dressing gown in front of the table, copying out authentic Scottish acts, when someone entered his room. It was Prince Andrei.
“Oh, it’s you,” said Pierre with an absent-minded and dissatisfied look. “And I’m working,” he said, pointing to a notebook with that look of salvation from the hardships of life with which unhappy people look at their work.
Prince Andrei, with a radiant, enthusiastic face and renewed life, stopped in front of Pierre and, not noticing his sad face, smiled at him with the egoism of happiness.
“Well, my soul,” he said, “yesterday I wanted to tell you and today I came to you for this.” I've never experienced anything like it. I'm in love, my friend.
Pierre suddenly sighed heavily and collapsed with his heavy body on the sofa, next to Prince Andrei.
- To Natasha Rostova, right? - he said.
- Yes, yes, who? I would never believe it, but this feeling is stronger than me. Yesterday I suffered, I suffered, but I wouldn’t give up this torment for anything in the world. I haven't lived before. Now only I live, but I cannot live without her. But can she love me?... I'm too old for her... What aren't you saying?...
- I? I? “What did I tell you,” Pierre suddenly said, getting up and starting to walk around the room. - I always thought this... This girl is such a treasure, such... This is a rare girl... Dear friend, I ask you, don’t get smart, don’t doubt, get married, get married and get married... And I’m sure that there will be no happier person than you.
- But she!
- She loves you.
“Don’t talk nonsense...” said Prince Andrei, smiling and looking into Pierre’s eyes.
“He loves me, I know,” Pierre shouted angrily.
“No, listen,” said Prince Andrei, stopping him by the hand. – Do you know what situation I’m in? I need to tell everything to someone.
“Well, well, say, I’m very glad,” said Pierre, and indeed his face changed, the wrinkles smoothed out, and he joyfully listened to Prince Andrei. Prince Andrei seemed and was a completely different, new person. Where was his melancholy, his contempt for life, his disappointment? Pierre was the only person to whom he dared to speak; but he expressed to him everything that was in his soul. Either he easily and boldly made plans for a long future, talked about how he could not sacrifice his happiness for the whim of his father, how he would force his father to agree to this marriage and love her or do without his consent, then he was surprised how something strange, alien, independent of him, influenced by the feeling that possessed him.
“I wouldn’t believe anyone who told me that I could love like that,” said Prince Andrei. “This is not at all the feeling that I had before.” The whole world is divided for me into two halves: one - she and there is all the happiness of hope, light; the other half is everything where she is not there, there is all despondency and darkness...
“Darkness and gloom,” Pierre repeated, “yes, yes, I understand that.”
– I can’t help but love the world, it’s not my fault. And I'm very happy. You understand me? I know you're happy for me.
“Yes, yes,” Pierre confirmed, looking at his friend with tender and sad eyes. The brighter the fate of Prince Andrei seemed to him, the darker his own seemed.

To get married, the consent of the father was needed, and for this, the next day, Prince Andrei went to his father.
The father, with outward calm but inner anger, accepted his son’s message. He could not understand that anyone would want to change life, to introduce something new into it, when life was already ending for him. “If only they would let me live the way I want, and then we would do what we wanted,” the old man said to himself. With his son, however, he used the diplomacy that he used on important occasions. Taking a calm tone, he discussed the whole matter.
Firstly, the marriage was not brilliant in terms of kinship, wealth and nobility. Secondly, Prince Andrei was not in his first youth and was in poor health (the old man was especially careful about this), and she was very young. Thirdly, there was a son whom it was a pity to give to the girl. Fourthly, finally,” said the father, looking mockingly at his son, “I ask you, postpone the matter for a year, go abroad, get treatment, find, as you want, a German for Prince Nikolai, and then, if it’s love, passion, stubbornness, whatever you want, so great, then get married.
“And this is my last word, you know, my last...” the prince finished in a tone that showed that nothing would force him to change his decision.
Prince Andrei clearly saw that the old man hoped that the feeling of him or his future bride would not withstand the test of the year, or that he himself, the old prince, would die by this time, and decided to fulfill his father’s will: to propose and postpone the wedding for a year.
Three weeks after his last evening with the Rostovs, Prince Andrei returned to St. Petersburg.

The next day after her explanation with her mother, Natasha waited the whole day for Bolkonsky, but he did not come. The next, third day the same thing happened. Pierre also did not come, and Natasha, not knowing that Prince Andrei had gone to his father, could not explain his absence.
Three weeks passed like this. Natasha did not want to go anywhere and, like a shadow, idle and sad, she walked from room to room, cried secretly from everyone in the evening and did not appear to her mother in the evenings. She was constantly blushing and irritated. It seemed to her that everyone knew about her disappointment, laughed and felt sorry for her. With all the strength of her inner grief, this vain grief intensified her misfortune.
One day she came to the countess, wanted to tell her something, and suddenly began to cry. Her tears were the tears of an offended child who himself does not know why he is being punished.
The Countess began to calm Natasha down. Natasha, who had been listening at first to her mother’s words, suddenly interrupted her:
- Stop it, mom, I don’t think, and I don’t want to think! So, I traveled and stopped, and stopped...
Her voice trembled, she almost cried, but she recovered and calmly continued: “And I don’t want to get married at all.” And I'm afraid of him; I have now completely, completely calmed down...
The next day after this conversation, Natasha put on that old dress, which she was especially famous for the cheerfulness it brought in the morning, and in the morning she began her old way of life, from which she had fallen behind after the ball. After drinking tea, she went to the hall, which she especially loved for its strong resonance, and began to sing her solfeges (singing exercises). Having finished the first lesson, she stopped in the middle of the hall and repeated one musical phrase that she especially liked. She listened joyfully to the (as if unexpected for her) charm with which these shimmering sounds filled the entire emptiness of the hall and slowly froze, and she suddenly felt cheerful. “It’s good to think about it so much,” she said to herself and began to walk back and forth around the hall, not walking with simple steps on the ringing parquet floor, but at every step shifting from heel (she was wearing her new, favorite shoes) to toe, and just as joyfully as I listen to the sounds of my own voice, listening to this measured clatter of a heel and the creaking of a sock. Passing by the mirror, she looked into it. - "Here I am!" as if the expression on her face when she saw herself spoke. - “Well, that’s good. And I don’t need anyone.”
The footman wanted to enter to clean something in the hall, but she did not let him in, again closing the door behind him, and continued her walk. This morning she returned again to her favorite state of self-love and admiration for herself. - “What a charm this Natasha is!” she said again to herself in the words of some third, collective, male person. “She’s good, she has a voice, she’s young, and she doesn’t bother anyone, just leave her alone.” But no matter how much they left her alone, she could no longer be calm and she immediately felt it.
The entrance door opened in the hallway, and someone asked: “Are you at home?” and someone's steps were heard. Natasha looked in the mirror, but she did not see herself. She listened to sounds in the hall. When she saw herself, her face was pale. It was he. She knew this for sure, although she barely heard the sound of his voice from the closed doors.
Natasha, pale and frightened, ran into the living room.
- Mom, Bolkonsky has arrived! - she said. - Mom, this is terrible, this is unbearable! – I don’t want... to suffer! What should I do?…
Before the countess even had time to answer her, Prince Andrei entered the living room with an anxious and serious face. As soon as he saw Natasha, his face lit up. He kissed the hand of the Countess and Natasha and sat down near the sofa.
“We haven’t had the pleasure for a long time...” the countess began, but Prince Andrei interrupted her, answering her question and obviously in a hurry to say what he needed.
“I wasn’t with you all this time because I was with my father: I needed to talk to him about a very important matter.” “I just returned last night,” he said, looking at Natasha. “I need to talk to you, Countess,” he added after a moment of silence.
The Countess, sighing heavily, lowered her eyes.
“I am at your service,” she said.
Natasha knew that she had to leave, but she could not do it: something was squeezing her throat, and she looked discourteously, directly, with open eyes at Prince Andrei.
"Now? This minute!... No, this can’t be!” she thought.
He looked at her again, and this look convinced her that she was not mistaken. “Yes, now, this very minute, her fate was being decided.”
“Come, Natasha, I’ll call you,” the countess said in a whisper.
Natasha looked at Prince Andrei and her mother with frightened, pleading eyes, and left.
“I came, Countess, to ask for your daughter’s hand in marriage,” said Prince Andrei. The countess's face flushed, but she said nothing.
“Your proposal...” the countess began sedately. “He was silent, looking into her eyes. – Your offer... (she was embarrassed) we are pleased, and... I accept your offer, I’m glad. And my husband... I hope... but it will depend on her...
“I’ll tell her when I have your consent... do you give it to me?” - said Prince Andrei.
“Yes,” said the countess and extended her hand to him and, with a mixed feeling of aloofness and tenderness, pressed her lips to his forehead as he leaned over her hand. She wanted to love him like a son; but she felt that he was a stranger and a terrible person for her. “I’m sure my husband will agree,” said the countess, “but your father...
“My father, to whom I told my plans, made it an indispensable condition of consent that the wedding should take place no earlier than a year. And this is what I wanted to tell you,” said Prince Andrei.
– It’s true that Natasha is still young, but for so long.
“It couldn’t be otherwise,” said Prince Andrei with a sigh.
“I will send it to you,” said the countess and left the room.
“Lord, have mercy on us,” she repeated, looking for her daughter. Sonya said that Natasha is in the bedroom. Natasha sat on her bed, pale, with dry eyes, looking at the icons and, quickly crossing herself, whispering something. Seeing her mother, she jumped up and rushed to her.
- What? Mom?... What?
- Go, go to him. “He asks for your hand,” the countess said coldly, as it seemed to Natasha... “Come... come,” the mother said with sadness and reproach after her running daughter, and sighed heavily.
Natasha did not remember how she entered the living room. Entering the door and seeing him, she stopped. “Has this stranger really become everything to me now?” she asked herself and instantly answered: “Yes, that’s it: he alone is now dearer to me than everything in the world.” Prince Andrei approached her, lowering his eyes.
“I loved you from the moment I saw you.” Can I hope?
He looked at her, and the serious passion in her expression struck him. Her face said: “Why ask? Why doubt something you can’t help but know? Why talk when you can’t express in words what you feel.”
She approached him and stopped. He took her hand and kissed it.
- Do you love me?
“Yes, yes,” Natasha said as if with annoyance, sighed loudly, and another time, more and more often, and began to sob.
- About what? What's wrong with you?
“Oh, I’m so happy,” she answered, smiled through her tears, leaned closer to him, thought for a second, as if asking herself if this was possible, and kissed him.
Prince Andrei held her hands, looked into her eyes, and did not find in his soul the same love for her. Something suddenly turned in his soul: there was no former poetic and mysterious charm of desire, but there was pity for her feminine and childish weakness, there was fear of her devotion and gullibility, a heavy and at the same time joyful consciousness of the duty that forever connected him with her. The real feeling, although it was not as light and poetic as the previous one, was more serious and stronger.
– Did maman tell you that this cannot be earlier than a year? - said Prince Andrei, continuing to look into her eyes. “Is it really me, that girl child (everyone said that about me) Natasha thought, is it really from this moment that I am the wife, equal to this stranger, sweet, intelligent man, respected even by my father. Is that really true! Is it really true that now it’s no longer possible to joke with life, now I’m big, now I’m responsible for my every deed and word? Yes, what did he ask me?
“No,” she answered, but she did not understand what he was asking.
“Forgive me,” said Prince Andrei, “but you are so young, and I have already experienced so much of life.” I'm scared for you. You don't know yourself.
Natasha listened with concentrated attention, trying to understand the meaning of his words and did not understand.
“No matter how difficult this year will be for me, delaying my happiness,” continued Prince Andrei, “in this period you will believe in yourself.” I ask you to make my happiness in a year; but you are free: our engagement will remain a secret, and if you were convinced that you do not love me, or would love me ... - said Prince Andrei with an unnatural smile.
- Why are you saying this? – Natasha interrupted him. “You know that from the very day you first arrived in Otradnoye, I fell in love with you,” she said, firmly convinced that she was telling the truth.
– In a year you will recognize yourself...
- The whole year! – Natasha suddenly said, now only realizing that the wedding had been postponed for a year. - Why a year? Why a year?...” Prince Andrei began to explain to her the reasons for this delay. Natasha didn't listen to him.
- And it’s impossible otherwise? – she asked. Prince Andrei did not answer, but his face expressed the impossibility of changing this decision.
- It's horrible! No, this is terrible, terrible! – Natasha suddenly spoke and began to sob again. “I’ll die waiting a year: this is impossible, this is terrible.” “She looked into the face of her fiancé and saw on him an expression of compassion and bewilderment.
“No, no, I’ll do everything,” she said, suddenly stopping her tears, “I’m so happy!” – Father and mother entered the room and blessed the bride and groom.
From that day on, Prince Andrei began to go to the Rostovs as a groom.

There was no engagement and Bolkonsky’s engagement to Natasha was not announced to anyone; Prince Andrei insisted on this. He said that since he was the cause of the delay, he must bear the entire burden of it. He said that he was forever bound by his word, but that he did not want to bind Natasha and gave her complete freedom. If after six months she feels that she does not love him, she will be within her right if she refuses him. It goes without saying that neither the parents nor Natasha wanted to hear about it; but Prince Andrei insisted on his own. Prince Andrei visited the Rostovs every day, but did not treat Natasha like a groom: he told her you and kissed only her hand. Between Prince Andrei and Natasha after the day of the proposal, completely different close ones were established than before, simple relationships. It was as if they didn't know each other until now. Both he and she loved to remember how they looked at each other when they were still nothing; now both of them felt like completely different creatures: then feigned, now simple and sincere. At first, the family felt awkward in dealing with Prince Andrei; he seemed like a man from an alien world, and Natasha spent a long time accustoming her family to Prince Andrei and proudly assured everyone that he only seemed so special, and that he was the same as everyone else, and that she was not afraid of him and that no one should be afraid his. After several days, the family got used to him and, without hesitation, continued with him the same way of life in which he took part. He knew how to talk about the household with the Count, and about outfits with the Countess and Natasha, and about albums and canvas with Sonya. Sometimes the Rostov family, among themselves and under Prince Andrei, were surprised at how all this happened and how obvious the omens of this were: the arrival of Prince Andrei in Otradnoye, and their arrival in St. Petersburg, and the similarity between Natasha and Prince Andrei, which the nanny noticed on their first visit Prince Andrei, and the clash in 1805 between Andrei and Nikolai, and many other omens of what happened were noticed by those at home.
The house was filled with that poetic boredom and silence that always accompanies the presence of the bride and groom. Often sitting together, everyone was silent. Sometimes they got up and left, and the bride and groom, remaining alone, were still silent. Rarely did they talk about their future lives. Prince Andrei was scared and ashamed to talk about it. Natasha shared this feeling, like all his feelings, which she constantly guessed. One time Natasha started asking about his son. Prince Andrei blushed, which often happened to him now and which Natasha especially loved, and said that his son would not live with them.
- From what? – Natasha said in fear.
- I can’t take him away from my grandfather and then...
- How I would love him! - Natasha said, immediately guessing his thought; but I know you want there to be no excuses to blame you and me.
The old count sometimes approached Prince Andrei, kissed him, and asked him for advice on the upbringing of Petya or the service of Nicholas. The old countess sighed as she looked at them. Sonya was afraid at every moment of being superfluous and tried to find excuses to leave them alone when they didn’t need it. When Prince Andrei spoke (he spoke very well), Natasha listened to him with pride; when she spoke, she noticed with fear and joy that he was looking at her carefully and searchingly. She asked herself in bewilderment: “What is he looking for in me? He's trying to achieve something with his gaze! What if I don’t have what he’s looking for with that look?” Sometimes she entered into her characteristic insanely cheerful mood, and then she especially loved to listen and watch how Prince Andrei laughed. He rarely laughed, but when he laughed, he gave himself entirely to his laughter, and every time after this laugh she felt closer to him. Natasha would have been completely happy if the thought of the impending and approaching separation did not frighten her, since he too turned pale and cold at the mere thought of it.
On the eve of his departure from St. Petersburg, Prince Andrei brought with him Pierre, who had never been to the Rostovs since the ball. Pierre seemed confused and embarrassed. He was talking to his mother. Natasha sat down with Sonya at the chess table, thereby inviting Prince Andrey to her. He approached them.
– You’ve known Bezukhoy for a long time, haven’t you? - he asked. - Do you love him?
- Yes, he is nice, but very funny.
And she, as always speaking about Pierre, began to tell jokes about his absent-mindedness, jokes that were even made up about him.
“You know, I trusted him with our secret,” said Prince Andrei. – I have known him since childhood. This is a heart of gold. “I beg you, Natalie,” he said suddenly seriously; – I’ll leave, God knows what might happen. You might spill... Well, I know I shouldn't talk about it. One thing - no matter what happens to you when I’m gone...
- What will happen?...
“Whatever the grief,” continued Prince Andrei, “I ask you, m lle Sophie, no matter what happens, turn to him alone for advice and help.” This is the most absent-minded and funny person, but the most golden heart.
Neither father and mother, nor Sonya, nor Prince Andrei himself could foresee how parting with her fiancé would affect Natasha. Red and excited, with dry eyes, she walked around the house that day, doing the most insignificant things, as if not understanding what awaited her. She did not cry even at that moment when, saying goodbye, he kissed her hand for the last time. - Don't leave! - she just said to him in a voice that made him think about whether he really needed to stay and which he remembered for a long time after that. When he left, she didn't cry either; but for several days she sat in her room without crying, was not interested in anything and only sometimes said: “Oh, why did he leave!”
But two weeks after his departure, just as unexpectedly for those around her, she woke up from her moral illness, became the same as before, but only with a changed moral physiognomy, just as children with a different face get out of bed after a long illness.

The health and character of Prince Nikolai Andreich Bolkonsky, in this Last year after my son left, we became very weak. He became even more irritable than before, and all the outbursts of his causeless anger for the most part attacked Princess Marya. It was as if he was diligently looking for all her sore spots in order to morally torture her as cruelly as possible. Princess Marya had two passions and therefore two joys: her nephew Nikolushka and religion, and both were favorite topics for the prince’s attacks and ridicule. Whatever they talked about, he turned the conversation to the superstitions of old girls or the pampering and spoiling of children. - “You want to make him (Nikolenka) an old girl like yourself; in vain: Prince Andrey needs a son, not a girl,” he said. Or, turning to Mademoiselle Bourime, he asked her in front of Princess Marya how she liked our priests and images, and joked...

Genus: Alopias Rafinesque = Fox sharks, sea foxes

Species: Alopias vulpinus (Bonnaterre, 1788) = Common sea fox

Common sea fox = Alopias vulpinus

The common sea fox (Thresher Shark) was first described by Bonnaterre in 1788 as Squalus vulpinis and later the name was changed to its current name: Alopias vulpinus (Bonaterre, 1788). The word Vulpinus is derived from "fox" - vulpes in Latin.

Synonymous names include Squalus vulpes Gmelin 1789, Alopias macrourus Rafinesque 1810, Galeus vulpecula Rafinesque 1810, Alopias caudatus Philipps 1932, Alopas greyi Whitely 1937 and others.

It is also called: Fox shark, Sea fox, Common thresher, Fish shark, Fox shark, Longtail shark, Sea fox, Swingtail, Swiveltail, Thresher, Thresher shark, Whiptail shark

The common sea fox is widespread in all oceans, mainly in temperate and subtropical zones. In the warm season, this shark migrates to the seas temperate zone. IN Atlantic Ocean for example, in summer it reaches the Gulf of St. Lawrence and the Lofoten Islands (Northern Norway).

In the western Atlantic, it is found from Newfoundland to Cuba and from southern Brazil to Argentina. In the eastern Atlantic from Norway and the British Isles to Ghana and the Ivory Coast, including the Mediterranean Sea.

In the Indo-Pacific region it is found in the waters South Africa, Tanzania, Somalia, Maldives, Chagos Archipelago, Gulf of Aden, Pakistan, India, Sri Lanka, Sumatra, Japan, Republic of Korea, Australia, New Zealand, and New Caledonia. The shark is also found in the Oceania Islands, Hawaii, and in the eastern Pacific region - from the coast of British Columbia through central California and Panama south to Chile.

The common sea fox lives in tropical and temperate waters, and is found both in the open ocean and near the coast. It usually stays in the surface layers of water, sometimes jumping above the surface.

The sea fox prefers cool sea water, but can also wander into cold coastal areas. It is capable of diving to depths of up to 350 m if necessary.

The sea fox is a typical pelagic shark. The common sea fox reaches 5-6 m in length. The maximum recorded length is 760 cm. Adult sea foxes weigh between 200-350 kg. Maximum weight is about 450 kg. It has small jaws, but can use its tail to chase and even kill fish. Their caudal keel has a very elongated upper lobe. The pectoral fins are sickle-shaped, narrow and curved. Like other sharks, it has an anal fin, 5 gill slits, 2 dorsal fins without any internal skeleton, the mouth is behind the eyes, and the eyes are without blinking eyelids.

The sea fox has few, blade-like, smooth, curved teeth. There are 20 teeth on both sides of the upper jaw and 21 teeth on both sides of the lower jaw. The teeth from a specimen caught off the Massachusetts coast measured nearly 13 feet in length.

The body of the common sea fox has a brown, gray or black back and a light belly, but there are dark spots near the pelvic fin and the beginning of the tail. The sides of the body are above the base of the pectoral fins with a white patch that extends forward from the ventral region.

Large sharks attack young sea foxes, but adults have no known predators. The common sea fox lives for 20 years or more.

The sea fox's usual food consists of various schooling fish, which it eats in large quantities.

Bony fish make up 97% of the sea fox's diet. Bluefish and butterfish are the most common food. They also feed on mackerel, herring, mackerel and other species.

The teeth are small, but strong and sharp, they are capable of grabbing not only a variety of fish, but also squid, octopus, crab, and even seabird.

In terms of lifestyle, the sea fox is a pelagic, highly migratory species, leading night image life. She - sea ​​view, inhabiting both coastal and ocean water. It is most commonly seen far from shore, although it often cruises close to the coast in search of food. Adults are common over the continental shelf, while juveniles live in coastal bays and near the water's edge.

The common sea fox uses its long tail as its main weapon when hunting. Approaching a school of fish, the sea fox begins to circle around it, foaming the water with whip-like blows of the caudal fin. Gradually the circles become smaller and smaller, and the frightened fish gather in an increasingly compact group. It is then that the shark begins to greedily swallow its prey. Sometimes a pair of sea foxes takes part in such a hunt.

In some cases, the sea fox acts with its tail fin as a flail, using it to stun its prey. Such a victim is not always a fish. In particular, they observed how a shark attacked seabirds sitting on the surface of the water using this method. A precise blow with its tail - and the shark turns around and grabs its unusual prey.

In the stomach of one specimen, about 4 m long, for example, 27 large mackerels were found.

They are very strong swimmers, so they can jump almost entirely out of the water.

Reproduction occurs by ovoviviparity (females do not have a placenta), and the fertility of this shark is very low - the female brings only two to four sharks, albeit very large ones. Their length at birth can reach 1.1 - 1.5 m, and their weight is between 5-6 kg.

The time of birth is confined to the warm summer season. Females give birth to up to 4-6 cubs. Baby sharks (more precisely, shark embryos) hatch from eggs while still inside the female. Developing embryos are ovophages; they will eat smaller, weaker baby sharks while they are in the womb.

On average, young sharks grow 50 cm per year, while adults grow by about 10 cm.

Females become sexually mature at a body length of at least 2.6-3.5 m, males - 3.3 m.

Sea foxes are not aggressive and do not pose a threat to human life, but an attack can be provoked. Sharks are shy and difficult to approach. Divers who encountered these sharks say they were not acting aggressively. There are two known provoked attacks of these sharks on boats with people. The sea fox's large tail can injure divers when attacked.

They have some commercial significance, sometimes being caught in the bycatch of tuna. Sea fox meat and fins are of good commercial quality. Their skin are used for skin, and the fat from their liver can be used to obtain a number of vitamins.

The overall abundance of the common sea fox is declining due to depleted fish stocks. Shark abundance in American Atlantic waters has decreased to about 67% of previous abundance.

On the range, status and abundance of the sea fox in the Mediterranean Sea: Common or frequent species. Throughout the western Mediterranean to Sicily; somewhat rarer from southern Tunisia and increasingly sporadic further east to Libya and Egypt. Sicilian and Maltese straits - sometimes local abundance. Cosmopolitan in the Ionian Sea, also on both sides of the Adriatic where the sea fox is found along the northern coasts; the coast of the Balkan Peninsula, the Aegean Sea, Türkiye, the Dodecanese and Cyprus; more rare view off the coast of Lebanon and Israel.

This species is also known as the common foxfish, fox shark and foxfish. The habitat extends to tropical and temperate waters. In the Atlantic Ocean, these cartilaginous fish live from Newfoundland to Argentina and from the North Sea to the southern tip of Africa. Found in the Mediterranean Sea. In the Indian Ocean they are common in its northern part. And in the Pacific Ocean, the fox shark has chosen a zone from Japan to New Zealand and from British Columbia to Chile.

This species is subject to seasonal migrations. It moves to northern latitudes along with warm masses of water. Moreover, the range of movement of males is wider than that of females. It is assumed that the populations of the Atlantic, Pacific and Indian Oceans have different life cycles. This is indirectly indicated by the fact that there are no migrations from ocean to ocean. Representatives of the species are deep-sea and live at depths of up to 550 meters. Only young sharks are sometimes found near the shore.

Description

The body is streamlined, torpedo-shaped with a short, wide head. The eyes are medium in size and lack urinary membranes. The mouth is small, its shape is curved. There are 35-52 rows of teeth on the upper jaw, and 26-49 such rows on the lower jaw. The teeth are small, triangular in shape, and have no serrations. There are 5 pairs of gill slits.

The main feature of the fox shark is its tail fin. His top part very long and matches the length of the body. With this powerful blade predatory fish stuns the victim. The pectoral fins are sickle-shaped. The dorsal fin is relatively high and is located approximately in the middle of the back. There is a tiny second dorsal fin. The pelvic fins are quite large. The skin is covered with protective placoid scales.

The color of the upper body varies from purple-brown to gray. The sides are bluish, the belly is white. In length, including the tail fin, the fox shark reaches 5 meters and weighs 230 kg. The officially registered maximum length is 5.7 meters. The estimated maximum length could reach 6.5 meters. And the heaviest caught was the female. With a body length of 4.8 meters, she weighed 510 kg.

Reproduction and lifespan

This species is ovoviviparous. Pregnancy lasts 9 months. There are from 2 to 7 newborns in a litter. They appear from March to June. They reach a length of 12-16 cm, weigh 5-6 kg and add 50 cm in length every year. Adult fox sharks grow 10 cm per year. Puberty in males occurs at a body length of 3-3.2 meters. Females mature at a length of 2.5-4.5 meters. IN wildlife The fox shark lives 15-20 years. The maximum life expectancy reaches 50 years.

Behavior and nutrition

The main diet consists of schooling fish such as mackerel, herring, garfish, anchovies; squid and invertebrates are also eaten. Fish hunting is carried out individually or in groups. Sharks, with their long tails, drive their victims into a dense pile and swallow them. In addition, common fox sharks can use their tails to stifle prey. In this way they attack sea lions and seabirds. However, this happens when there are few fish. If there is a lot of it, then only it is eaten.

Conservation status

IN beginning of XXI century, this species received the status of vulnerable. This was linked to commercial overfishing. Representatives of the species value their meat and fins. Vitamins are obtained from the liver, and the skin is tanned. Fox sharks are currently protected by law. Catch these cartilaginous fish has decreased, but poachers still cause some damage to this species.

Fox shark - most interesting representative ocean depths. This is a large cartilaginous fish whose body shape resembles a torpedo. The genus includes three species of predators. They all have characteristic features body structure and behavior.

What does the name mean?

The genus of sharks received its unusual name due to its long tail, or more precisely, the tip of the caudal fin. The upper segment can account for almost half the entire length of the predator. In addition to its size, the tail has another feature - the elongated lobe of the tail is flexible and movable. The British, having watched the predator hunt, gave it the most accurate name: thresher shark. It literally sounds like “thresher shark.” This is due to the unusual way of hunting.

Unusual hunt

The fox shark does not waste time on trifles: it does not chase individual victims, but prefers an abundant “restaurant” menu. During the hunt, the predator drives the frightened prey into a dense school, crashes into it and begins to “thresh” in different directions with its long tail. Then he leisurely dines on stunned fish. Considering the size of the predator, one can imagine the power of such a “thresher”. The fishermen who managed to catch the amazing shark complained that the fish, pulled out of its usual environment onto the deck, managed to smash and break with its tail everything it could reach.

Appearance

Since the tail is the most prominent part of this species, descriptions of the predator's appearance almost always begin with it. However, it is worth noting that the fox shark is the most impressive representative of cartilaginous fish. It has an elongated torpedo-shaped body, a wide head and a pointed muzzle. For breathing, the underwater inhabitant has 5 paired gill slits. The two outermost slits are located above the pectoral fins. The fins themselves are pointed and long. The fox shark has a small curved mouth with labial grooves. The predator's teeth are small and their edges are smooth.

The anal and dorsal fins, unlike the caudal fin, are small. There are slight differences in fin sizes and colors among different ones.

Taxonomy of species

The sea fox family is divided into 3 species:

  1. Alopias vulpinus, that is, the common sea fox.
  2. Alopias superciliosus is a deep fox shark called the big-eyed fox.
  3. Alopias pelagicus, a species of pelagic (small-toothed) fox.

In 1995, a fish was discovered in the waters of California, which they wanted to designate as a fourth species, but there was no confirmation of this theory, and the fourth species remained unrecognized.

Main differences. Common fox

It has a streamlined body shape with a clear curve of the back. She has a cone-shaped short head with medium-sized eyes that lack a third eyelid. The predator's teeth are small, fang-like, slightly flattened. The average size of sharks is about five meters. At the same time, a maximum was recorded - more than 7 m, and a minimum - less than four.

The shark's body color is heterogeneous. There were individuals of dark brown, blue-gray, and steel color. Some fish had a black back and a light belly.

Deep sea big-eyed fox

Despite the body structure typical of fox sharks, this representative is easily recognized by the size of its eyes. The big-eyed fox shark fully lives up to its name. In some individuals, the diameter of the eye reaches 10 cm. The peculiarity of the location of the organ in the orbit allows the predator to see not only in front and to the sides, but also to view the space above its head.

Another one distinguishing feature type - special lateral grooves. They are formed at the junction of the body and the head, passing over the gill slits and eye sockets.

The teeth of the bigeye fox shark are larger than those of other species. They have one apex and are the same size on the upper and lower jaws.

The body color is brownish-violet, the belly is always lighter than the back. The dorsal fin is shifted towards the tail.

Pelagic fox

The color is dark: most often these are various shades of blue and gray colors. The shark's belly is much lighter.

The species has well-developed pectoral, caudal and dorsal fins. But at the same time, the second dorsal and anal fin are very small. The elongated lobe of the tail is narrower than in other species.

Habitat and diet

The fox shark has a wide range. It is found in the tropics and temperate latitudes. The pelagic species is characterized by an existence remote from coastlines. This species lives in surface layers and at depths up to 150 m.

The big-eyed fox prefers more serious depth. She is comfortable 500 m below the surface.

They love the coastal zone, but feel good far from land. This species prefers surface layers, but can dive up to 500 meters.

Fox sharks don't attack too much big catch, since the basis of their diet is schooling fish. We have already talked about the hunting habits of this genus, but this does not mean that predators cannot make exceptions. In the absence of schools of fish, the diet of the fox shark can include any living creature. The person, most likely, will simply be stunned by the tail - the shark will not dare to dine on such an unpredictable enemy.

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