Etmopterus brachyurus
| Etmopterus brachyurus | ||||||||||||
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| Scientific name | ||||||||||||
| Etmopterus brachyurus | ||||||||||||
| HM Smith & Radcliffe , 1912 |
Etmopterus brachyurus is a species of the genus Etmopterus within the lantern sharks (Etmopterinae; also classified as the family Etmopteridae). The range of this species is limited to parts of the Pacific.
Appearance and characteristics
Etmopterus brachyurus reaches a body length of about 24 to 28 centimeters for the females and about 50 centimeters for the males, the known maximum length is 67 centimeters. It has an elongated body typical of the lantern sharks with a long and at the same time wide and flattened head and a comparatively short tail. The body color is uniformly dark brown to black brown with a slightly darker belly side with striking markings on the belly and the fins. The skin is relatively rough and has noticeable rows of hook-shaped denticles that extend from the head to the tip of the tail. It also has the light organs typical of the lantern sharks on the belly side.
It has no anal fin and two dorsal fins with the order-typical spines in front of the dorsal fins. The first dorsal fin starts further behind the pectoral fins and is smaller than the second. The second spine is long and slightly curved. Like all species in the family, the animals have five gill slits and an injection hole behind the eye.
distribution
The range of Etmopterus brachyurus is limited to the western Pacific Ocean , finds come from the region around Japan , the Philippines and Australia . It is sometimes assumed that the animals from the southern Pacific can be attributed to one or two other species.
Way of life
Etmopterus brachyurus lives on the ground on the continental shelf at depths of up to 481 meters. Like other sharks, it feeds in a predatory manner, likely on smaller fish and invertebrates. Little data is available about his way of life.
Like other species of order, it is viviparous ( ovoviviparous ).
Danger
Etmopterus brachyurus is not included in a hazard category in the IUCN Red List due to a lack of data and is classified as "data deficient". It is irrelevant as a food fish and is therefore not fished specifically.
literature
- Leonard Compagno , Marc Dando, Sarah Fowler: Princeton Field Guides: Sharks of the World . Princeton University Press , Princeton and Oxford 2005, ISBN 978-0-691-12072-0 , pp. 95-96 .
Web links
- Etmopterus brachyurus on Fishbase.org (English)
supporting documents
- ↑ a b Etmopteridae: Lantern sharks. In: Compagno et al. 2004
- ↑ a b c Etmopterus brachyurus. In: Compagno et al. 2004, pp. 95-96
- ↑ Etmopterus brachyurus on Fishbase.org (English)
- ↑ Etmopterus brachyurus in the endangered Red List species the IUCN 2015 Posted by: McCormack, C., Tanaka, S. & Kyne, PM, 2015. Accessed July 29, 2018th