Holohalaelurus grennian is a recently described and little studied species of the genus of African spotted sharks ( Holohalaelurus ) of the cat shark family ( Scyliorhinidae ). It lives in the western Indian Ocean off the coast of South Africa . The maximum size is 27.3 cm. Propagate by laying eggs enclosed in capsules. These harmless fish are not of commercial value and are not subject to recreational fishing. However, their limited range and intensive fishing in their habitats make them potentially vulnerable.
| Holohalaelurus grennian |
| Scientific classification |
|---|
| No rank : | Bilateral symmetrical |
| Gender: | African spotted sharks |
| View: | Holohalaelurus grennian |
|
| International scientific name |
|---|
Holohalaelurus grennian Human , 2006 |
| Security status |
|---|
Not enough data IUCN Data Deficient : 161531 |
|
Content
Holohalaelurus grennian is a recently described species of sharks, which were previously combined with the species Holohalaelurus melanostigma [1] , and then considered synonymous with the African spotted shark ( Holohalaelurus punctatus ) [2] . The view is known for only 4 museum specimens. The holotype is an adult male 26.7 cm long, caught off the coast of Ras Ngomeni, Kenya , at a depth of 246 m [3] . More recently, Holohalaelurus grennian was included in the complex of Holohalaelurus species [4] , however, in 2006 the species was clearly separated from the Holohalaelurus taxon [5] .
The Holohalaelurus grennian range is limited to coastal waters in northern Tanzania and southern Kenya, most likely having an area of ββless than 20,000 mΒ². There is probably only one population. These bottom sharks are found at a depth of 238β300 m [5] .
Little is known about the life of these sharks. They breed by laying eggs. The length of adolescents is 16.5 cm (males) and 20.6 cm (females). Males reach puberty with a length of 26.7 cm [5] .
Holohalaelurus grennian does not pose a danger to humans. They have no commercial value. To assess the conservation status of the data type is not enough [6] .
- β Norman, JR 1939. Fishes. The John Murray Expedition 1933-34. Sci. Reports, John Murray Expedition 7 (1): 1-116.
- β Bass, AJ, D? Aubery, JD and Kistnasamy, N. 1975. Sharks of the east coast of southern Africa. II. The families Scyliorhinidae and Pseudotriakidae. Investigational Report No. 37. South African Association for Marine Biological Research, Oceanographic Research Institute.
- β http://shark-references.com (unopened) . Date of treatment July 20, 2012. Archived on September 29, 2012.
- β Compagno, LJV Sharks of the Order Carcharhiniformes. - Blackburn Press, 1988. - ISBN 1-930665-76-8 ..
- β 1 2 3 Human, BA 2006 .. A taxonomic revision of the catshark genus Holohalaelurus Fowler 1934 (Chondrichthyes: Carcharhiniformes: Scyliorhinidae), with descriptions of two new species. Zootaxa 1315: 1-56p.
- β Human, B. 2009. Holohalaelurus grennian. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.1. <www.iucnredlist.org>. Downloaded on July 20, 2012.
