Elasmobranchii (hajar och rockor) (sharks and rays) >
Carcharhiniformes (Ground sharks) >
Pentanchidae (Deepwater catsharks)
Etymology: Apristurus: a-, Latin privative, i.e., without; pristis, from pristes (Gr.), sawyer (but here meaning saw); oura (Gr.), tail, referring to absence of saw-toothed crest of enlarged dermal denticles along upper edge of caudal fin as found in the closely related Pristiurus (=Galeus). (See ETYFish); longicephalus: longus (L.), long; cephalus, from kephale (Gr.), head, about ¼ of total length. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
Ekologi
marina djupbottenlevande; djupintervall 680 - 950 m (Ref. 97621). Deep-water; 39°N - 22°S
Indo-West Pacific: Seychelles, Japan, East China Sea, Philippines, and Australia. New specimens were caught off western New Caledonia (Coriolis Bank, Lansdowne Bank, Lord Howe Ridge and Fairway Ridge) and off Mozambique (Ref. 53905).
Length at first maturity / Size / Vikt / Age
Maturity: Lm 51.0 range ? - ? cm
Max length : 60.0 cm TL hane/ej könsbestämd; (Ref. 559)
Taggstrålar i ryggfenan (totalt): 0; Mjukstrålar i ryggfenan (totalt): 0; Taggstrålar i analfenan 0; Mjukstrålar i analfenan: 0. Grey-black, without conspicuous markings (Ref. 244).
Inhabits deep water, probably near the bottom (Ref. 11146). Oviparous (Ref. 50449). First record of a cartilaginous fish manifesting rudimentary hermaphroditism (Ref. 53905). Biology little known (Ref. 6871).
Life cycle and mating behavior
Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref. 50449). First record of a cartilaginous fish manifesting hermaphroditism which is further classified as rudimentary hermaphroditism (Ref. 53905).
Compagno, L.J.V., 1984. FAO Species Catalogue. Vol. 4. Sharks of the world. An annotated and illustrated catalogue of shark species known to date. Part 2 - Carcharhiniformes. FAO Fish. Synop. 125(4/2):251-655. Rome: FAO. (Ref. 244)
IUCN Red List Status (Ref. 130435)
Human uses
Fiskeri: mindre kommeriell
Ytterligare information
referenserVattenbrukVattenbruksprofilAvelslinjerGenetikElectrophoresesÄrftlighetSjukdomarBehandlingNutrientsMass conversion
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Estimates based on models
Preferred temperature (Ref.
123201): 5.2 - 7.4, mean 6 °C (based on 99 cells).
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00355 (0.00176 - 0.00714), b=3.09 (2.91 - 3.27), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
Trofisk nivå (Ref.
69278): 3.9 ±0.4 se; based on size and trophs of closest relatives
Resiliens (Ref.
120179): Mycket låg, lägsta populationsfördubblingstid mer än 14 år (Fec assumed to be <10).
Fishing Vulnerability (Ref.
59153): Moderate vulnerability (44 of 100).
