bio.wikisort.org - Animal
The frog shark (Somniosus longus) is a very rare species of squaliform shark mainly found in deep water in the Pacific Ocean. It is in the sleeper shark family Somniosidae with the Greenland shark.
| Frog shark | |
|---|---|
Conservation status | |
Scientific classification  | |
| Kingdom: | Animalia |
| Phylum: | Chordata |
| Class: | Chondrichthyes |
| Superorder: | Selachimorpha |
| Order: | Squaliformes |
| Family: | Somniosidae |
| Genus: | Somniosus |
| Species: | S. longus |
| Binomial name | |
| Somniosus longus S. Tanaka (I), 1912 | |
| Synonyms | |
|
Heteroscymnus longus Tanaka, 1912 | |
Description
The frog shark is known to grow to a maximum length of 110 cm in males and 130 cm in females. Previously classified in the same taxon as the similar Somniosus rostratus, it is differentiated from S. rostratus in having a longer second dorsal fin, a slightly larger eye, more rows of teeth and a greater spiral valve count.[2]
Range
Fewer than a dozen specimens of this deepwater shark have been collected, mostly from the Pacific Ocean. The frog shark has been recorded off the coasts of Japan, New Zealand, and possibly Salas y Gómez, as well as the Nazca Ridge, from as shallow as 120–150 m and as deep as 1,116 m.[1]
Threats
The frog shark is occasionally caught by trawl, longline, and crab-pot fisheries. As of 2015, no current conservation efforts are in place.[1] In June 2018 the New Zealand Department of Conservation classified the frog shark as "Data Deficient" with the qualifier "Uncertain whether Secure Overseas" under the New Zealand Threat Classification System.[3]
References
- Finucci, B.; Francis, M.P.; Tanaka, S. (2018). "Somniosus longus". IUCN Red List of Threatened Species. 2018: e.T161552A116739120. doi:10.2305/IUCN.UK.2018-2.RLTS.T161552A116739120.en. Retrieved 19 November 2021.
- Yano, Kazunari; Stevens, John D. & Compagno, Leonard J. V. (2004). "A review of the systematics of the sleeper shark genus Somniosus with redescriptions of Somniosus (Somniosus) antarcticus and Somniosus (Rhinoscymnus) longus (Squaliformes: Somniosidae)". Ichthyological Research. 51 (4): 360–373. doi:10.1007/s10228-004-0244-4.
- Duffy, Clinton A. J.; Francis, Malcolm; Dunn, M. R.; Finucci, Brit; Ford, Richard; Hitchmough, Rod & Rolfe, Jeremy (2018). Conservation status of New Zealand chondrichthyans (chimaeras, sharks and rays), 2016 (PDF). Wellington, New Zealand: Department of Conservation. p. 11. ISBN 9781988514628. OCLC 1042901090.
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На других языках
- [en] Frog shark
[ru] Японская полярная акула
Японская полярная акула[1] (лат. Somnisious longus) — вид рода полярных акул семейства сомниозовых акул отряда катранообразных. Обитает в северо-западной, юго-западной и юго-восточной части Тихого океана. Встречается на глубине до 1160 м. Максимальный зарегистрированный размер 143 см. Размножается яйцеживорождением[2]. Не представляет интереса для коммерческого рыболовства[3].Другой контент может иметь иную лицензию. Перед использованием материалов сайта WikiSort.org внимательно изучите правила лицензирования конкретных элементов наполнения сайта.
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