|Scientific Name:||Apristurus fedorovi Dolganov, 1983|
|Taxonomic Notes:||The genus Apristurus contains at least 32 described species and a relatively large number of potentially undescribed ones. Morphological conservatism and, until recently, a lack of objectively defined characters makes this one of the most taxonomically confused shark genera (Compagno 1984, Nakaya and Sato 1999).
Nakaya and Sato (1999) defined three species groups within Apristurus: the longicephalus-group (two species), brunneus-group (20 species), and spongiceps-group (10 species). A. fedorovi belongs to the spongiceps-group, characterized by: a short, wide snout (prenarial length < 6% TL); 7 to 12 valves in the spiral intestine; upper labial furrows subequal to, or shorter than the lower furrows; a continuous supraorbital sensory canal.
|Red List Category & Criteria:||Data Deficient ver 3.1|
|Assessor(s):||Duffy, C. & Huveneers, C.|
|Reviewer(s):||Kyne, P.M., Cavanagh, R.D. & Fowler, S.L. (Shark Red List Authority)|
This is a very poorly known species, with less than 30 specimens reported in the scientific literature. Almost nothing is known of its biology. This species may be endemic to northern Japanese waters where it is taken in water around 1,200 m deep. However, accurate identification of Apristurus species is particularly difficult and further research is required to determine its geographical and bathymetrical distribution. Insufficient information is available to assess the species beyond Data Deficient.
|Range Description:||A. fedorovi is known from northern Japan (FAO area 61).|
|FAO Marine Fishing Areas:|
Pacific – northwest
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||Population size and trends are not known (rarely collected).|
|Current Population Trend:||Unknown|
|Habitat and Ecology:||Known from about 29 specimens (16 males, 13 females) caught in northern Japanese waters around 1,200 m depth (Dolganov 1985, Nakaya and Sato 1999). Reaches at least 68.3 cm total length (TL) (Nakaya and Sato 1999). A 55.4 cm TL male was mature, female size at maturity is unknown. Maybe an endemic species with a restricted range, however, further research is required to determine its geographical and bathymetrical distribution. Nothing else is known of its biology.
Apristurus species are relatively small, sluggish sharks that live on or near the bottom over upper to mid continental and insular slopes. Diet includes crustaceans (penaeid shrimps, euphausiids), squids and small fishes. Where known reproduction is oviparous with one egg per oviduct. Egg cases are usually thick-walled and about 5 to 6.8 cm long and 2.5 to 2.9 cm wide. The anterior end of the case has a long weak fibrous thread on each corner. The posterior end usually has two small processes, each with a long coiled tendril. As in shallow water scyliorhinids the coiled tendrils are probably used to attach the egg cases to hard substrates and/or biogenic structures as they are laid.
|Major Threat(s):||Deepwater trawl fisheries. Other species of deepwater Chondrichthyans are known to be captured as bycatch in deepwater fisheries. As these fisheries expand globally, consideration needs to be given to the fact that this species too may be captured incidentally in deepwater fisheries.|
|Conservation Actions:||No conservation measures are currently in place for this species.|
Compagno, L.J.V. 1984. FAO Species Catalogue. Sharks of the World: an annotated and illustrated catalogue of the shark species known to date. Part 2 - Carcharhiniformes. FAO Fisheries Synopsis No. 125, Vol. 4(2). FAO, Rome.
Compagno, L.J.V. In prep. b. Sharks of the World. An annotated and illustrated catalogue of the shark species known to date. Volume 3. (Carcharhiniformes). FAO Species Catalogue for Fisheries Purposes No. 1, Vol.3. FAO, Rome.
IUCN. 2004. 2004 IUCN Red List of Threatened Species. Available at: www.iucnredlist.org. (Accessed: 23 November 2004).
IUCN SSC Shark Specialist Group. Specialist Group website. Available at: http://www.iucnssg.org/.
Nakaya, K. and Sato, K. 1999. Species grouping within the genus Apristurus (Elasmobranchii: Scyliorhinidae). In: B. Séret and J.-Y. Sire (eds). Proceedings of the 5th Indo-Pacific Fish Conference (Nouméa, 3-8 November 1997). Paris, Society Francaise d’Ichthyologie et Instutue de Recherches pour le Development: 307–320.
|Citation:||Duffy, C. & Huveneers, C. 2004. Apristurus fedorovi. The IUCN Red List of Threatened Species 2004: e.T44210A10871948.Downloaded on 18 January 2018.|
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