Great black dogfish
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Great black dogfish ( Etmopterus princeps ) |
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| Etmopterus princeps | ||||||||||||
| Collett , 1904 |
The great black dogfish ( Etmopterus princeps ) is a species of shark from the lantern shark family (Etmopteridae). The distribution area of this species extends in the north east Atlantic from southern Iceland over the Faroe Islands , the Hebrides , the coasts of the British Isles , the English Channel and the Biscay to the coast of Mauritania . The shark is found on the American east coast from Nova Scotia to New Jersey .
Appearance and characteristics
The great black dogfish reaches a maximum length of 75 centimeters. It has an elongated body typical of the lantern sharks with a broad and flattened head. The teeth in the upper jaw have four to seven points. The body color is a solid dark brown without any lightening. On the belly side it has the tiny luminous organs typical of lantern sharks , which produce a greenish shimmer in living animals.
One anal fin is missing, the two dorsal fins are preceded by the spines typical of the order. The first dorsal fin begins behind the pectoral fins. It is smaller and flatter than the second and has a small spine, while the spine of the second dorsal fin is strong and as high as the fin. Like all species in the family, the animals have five gill slits and a spray hole behind the eye.
Way of life
The great black dogfish lives close to the ground on the continental shelf and the continental slopes at depths of 300 to 2200 meters. It feeds on smaller fish, cephalopods and crustaceans. Little data is available about his way of life. Like other species of order, it is viviparous ( ovoviviparous ).
Danger
The IUCN states in its Red List that there are insufficient data to assess the degree of endangerment of Etmopterus princeps . The species is bycatch in deep-sea fishing .
supporting documents
- ↑ Etmopterus princeps in the endangered Red List species the IUCN 2006. Posted by: Kyne, PM, Cavanagh, RD, Heupel, MR & Simpfendorfer, CA (Shark Red List Authority), 2008. Accessed July 6, 2011th
Web links
- Great Black Dogfish on Fishbase.org (English)
literature
- Bent J. Muus, Jørgen G. Nielsen: The marine fish of Europe in the North Sea, Baltic Sea and Atlantic. Kosmos, Stuttgart 1999, ISBN 3-440-07804-3 .