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Draughtsboard shark : ウィキペディア英語版
Draughtsboard shark

:''Not to be confused with the draughtboard shark, ''Cephaloscyllium laticeps'', of Australia.''
The draughtsboard shark (''Cephaloscyllium isabellum'') is a species of catshark, and part of the family Scyliorhinidae, so named for its "checkerboard" color pattern of dark blotches. It is endemic to New Zealand, where it is also known as the carpet shark (which usually refers to the entire order Orectolobiformes).〔 This shark typically reaches in length and has a thick body with a broad, flattened head and a capacious mouth. Its two dorsal fins are placed far back on the body, with the first much larger than the second.
Occurring down to a depth of , the draughtsboard shark frequents rocky reefs during the day and sandy flats at night. Its diet consists of fishes and invertebrates. When threatened by a predator, it can take water or air into its body to inflate its body, which may be the cause of its unusual habit of barking like a dog. This species is oviparous, with females laying smooth, tendril-bearing egg capsules in pairs. Draughtsboard sharks are often taken as bycatch by commercial fisheries, but are probably hardy enough to survive the experience. The International Union for Conservation of Nature (IUCN) has listed this species under Least Concern.
==Taxonomy==
French naturalist Pierre Joseph Bonnaterre originally described the draughtsboard shark as ''Squalus isabella'', in the 1788 ichthyology volume of the ''Tableau encyclopédique et méthodique des trois règnes de la nature''. He based his account on "L'Isabelle", referred to by Pierre-Marie-Auguste Broussonet in a 1780 ''Histoire de l'Académie Royale des Sciences'' paper. The type specimen has since been lost. Later authors moved this species to the genus ''Cephaloscyllium''.〔
The draughtsboard shark closely resembles the blotchy swellshark (''C. umbratile'') and the Australian swellshark (''C. laticeps''), both of which have been suspected to be the same species as ''C. isabellum'' by different authors at various times. The draughtsboard shark differs from the Australian swellshark in coloration and the form of its egg capsules (smooth in ''C. isabellum'' and ridged in ''C. laticeps'').〔 It differs from the blotchy swellshark in coloration and morphometric measurements.〔

抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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