Dogfish

Dogfish
Dogfish ( Squalus acanthias )
Systematics
Subclass : Euselachii Subclass : Plate gill (Elasmobranchii) without rank: Sharks (selachii) Superordinate : Squalomorphii Order : Spiny dogfish (Squaliformes) Family : Dogfish
Scientific name
Squalidae
Blainville , 1816

The family dogfish (Squalidae) is the world, in the Atlantic , Pacific and Indian Ocean common. They live in cool as well as in tropical seas and stay mainly over the shelf areas of continents and islands and over seamounts . The best-known representative is the dogfish ( Squalus acanthias ), which is also found in the North Sea and the Mediterranean .

What all dogfish have in common is the absence of the anal fin , a feature that they have in common with angel sharks and saw sharks . There is an unnotched spine in front of both dorsal fins . The caudal fin stalk has lateral keels. Dogfish are between 50 centimeters and 1.20 meters long.

All dogfish are ovoviviparous , which means that the embryos hatch from their egg capsules in the womb and develop in the uterine region to birth size and are then born alive. One also speaks of "aplacental viviparia ".

Genera and species

Mandarin Schnauz Dogfish ( Cirrhigaleus barbifer )

Long-nosed dogfish ( Squalus blainville )

Cuban dogfish ( Squalus cubensis )

Small peaks dogfish ( Squalus mitsukurii )

There are two genera with over 35 species :

• Genus: Cirrhigaleus (Tanaka, 1912)
  • Rough-skinned dogfish ( Cirrhigaleus asper (Merrett, 1973) )
  • Southern mandarin schnauz dogfish ( Cirrhigaleus australis (White, Last & Stevens, 2007) )
  • Mandarin Schnauz dogfish ( Cirrhigaleus barbifer (Tanaka, 1912) )
• Genus: Squalus (Linnaeus, 1758)
  • Dogfish ( Squalus acanthias (Linnaeus, 1758) )
  • Squalus acutipinnis Regan, 1908 (possibly synonym of Squalus megalops )
  • Squalus acutirostris (Chu, Meng & Li, 1984) (possibly synonym of Squalus mitsukurii )
  • Squalus albicaudus Viana et al., 2016
  • Eastern highfin dogfish ( Squalus albifrons (Last, White & Stevens, 2007) )
  • Western high fin dogfish ( Squalus altipinnis (Last, White & Stevens, 2007) )
  • Squalus bahiensis Viana et al., 2016
  • Squalus bassi Viana et al., 2017
  • Long-nosed dogfish ( Squalus blainville (Risso, 1827) )
  • Squalus boretzi Dolganov, 2019
  • Squalus brevirostris (Tanaka, 1917)
  • Great-headed dogfish ( Squalus bucephalus (Last, Séret & Pogonoski, 2007) )
  • Green- eyed dogfish ( Squalus chloroculus (Last, White & Motomura, 2007) )
  • Squalus clarkae Pfleger et al., 2018
  • Fat-thorn dogfish ( Squalus crassispinus (Last, Edmunds & Yearsley, 2007) )
  • Cuban dogfish ( Squalus cubensis (Howell Rivero, 1936) )
  • Edmund's dogfish ( Squalus edmundsi (White, Last & Stevens, 2007) )
  • Squalus formosus White & Iglésias, 2011
  • Eastern long-nosed dogfish ( Squalus grahami (White, Last & Stevens, 2007) )
  • Northern dogfish ( Squalus griffini (Phillipps, 1931) )
  • Squalus hawaiiensis Daly-Engel et al., 2018
  • Indonesian short- snouted dogfish ( Squalus hemipinnis (White, Last & Yearsley, 2007) )
  • Japanese dogfish ( Squalus japonicus (Ishikawa, 1908) )
  • Squalus lalannei (Baranes, 2003)
  • Squalus lobularis Viana et al., 2016
  • Squalus mahia Viana et al., 2017
  • Squalus margaretsmithae Viana et al., 2017
  • Short-nosed dogfish ( Squalus megalops (Macleay, 1881) )
  • Black-tailed dogfish ( Squalus melanurus (Fourmanoir & Rivaton, 1979) )
  • Small tips dogfish ( Squalus mitsukurii (Jordan & Snyder, 1903) )
  • Indonesian green-eyed dogfish ( Squalus montalbani (Whitley, 1931) )
  • Western long-nosed dogfish ( Squalus nasutus (Last, Marshall & White, 2007) )
  • Streif tail dogfish ( Squalus notocaudatus (load, White & Stevens, 2007) )
  • Squalus probatovi Myagkov & Kondyurin, 1986
  • Squalus quasimodo Viana et al., 2016
  • Cyrano dogfish ( Squalus rancureli (Fourmanoir & Rivaton, 1979) )
  • Kermadec dogfish ( Squalus raoulensis (Duffy & Last, 2007) )
  • Squalus shiraii Viana & Carvalho, 2020
  • Squalus suckleyi ( Girard , 1854)

literature

• Joseph S. Nelson: Fishes of the World . John Wiley & Sons, 2006, ISBN 0-471-25031-7

Web links

Commons : Dogfish  - Collection of images, videos and audio files

• Dogfish on Fishbase.org (English)
• Information on dogfish from www.hai.ch

Individual evidence

1. ^ William T. White, Peter R. Last, John D. Stevens: Cirrhigaleus australis n. Sp., A new Mandarin dogfish (Squaliformes: Squalidae) from the south-west Pacific Zootaxa 1560, 2007: pp. 19-30.
2. ↑ Viana, STFL & Carvalho, MR (2020): Squalus shiraii sp. nov. (Squaliformes, Squalidae), a new species of dogfish shark from Japan with regional nominal species revisited. Zoosystematics and Evolution, 96 (2): 275-311. DOI: 10.3897 / zse.96.51962