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); yangi: In honor of Lei Yang, College of Charleston (Charleston, South Carolina, USA), whose molecular phylogenetic work on sharks and rays has improved our understanding of their alpha taxonomy and phylogenetic relationships. (See ETYFish).
Environment: milieu / climate zone / depth range / distribution range
Ekologi
marina djupbottenlevande; djupintervall 630 - 786 m (Ref. 116167). Tropical
Western Central Pacific: Papua New Guinea.
Size / Vikt / Age
Maturity: Lm ? range ? - ? cm
Max length : 43.7 cm TL (female)
Short description
Morfologi | Morfometri
This long-snouted species is distinguished by the following set of characters: head long and narrow, head length 23.5-23.8% TL; interorbital space 5.8-6.7% TL; very elongate snout, preoral length 12.4-12.7% TL; preorbital length 12.6-12.9% TL; wide mouth, its width 7.9-8.6% TL; pelvic-anal space 3.2-4.0% TL; anal fin is relatively large, base length 14.9-15.4% TL; anal-fin posterior margin 11.0% TL; prepectoral length is relatively long, about 22.3-23.5% TL; labial furrows long and not confined to mouth corners, uppers 3.7-3.8% TL; absence of enlarged denticles on upper or lower caudal fin; duodenum of intestine very short, 8 intestinal spiral valves; tip of snout blackish; 32-33 monospondylous centra; 38 precaudal-diplospondylous vertebrae; precaudal centra 70-71; females mature to adult by 43.7 cm TL; egg case is small (about 5.9 cm long), with faint longitudinal striations (Ref. 116167).
The pregnant female individual caught contained a single egg capsule (Ref. 116167).
Life cycle and mating behavior
Könsmognad | Reproduktion | Lek | Ägg | Fecundity | Larver
White, W.T., R.R. Mana and G.J.P. Naylor, 2017. Description of a new species of deepwater catshark Apristurus yangi n. sp. (Carcharhiniformes: Pentanchidae) from Papua New Guinea. Zootaxa 4320(1):025-040. (Ref. 116167)
IUCN Red List Status (Ref. 130435)
Threat to humans
Harmless
Human uses
Ytterligare information
PopulärnamnsynonymerMetabolikPredatorerEkotoxikologiReproduktionKönsmognadLekSpawning aggregationFecundityÄggEgg development
Age/SizeTillväxtLength-weightLength-lengthLength-frequenciesMorfometriMorfologiLarverLarvdynamikRekryteringAbundansBRUVS
referenserVattenbrukVattenbruksprofilAvelslinjerGenetikElectrophoresesÄrftlighetSjukdomarBehandlingNutrientsMass conversion
MedarbetareBilderStamps, Coins Misc.LjudCiguateraHastighetSimsättGälytaOtolithsHjärnstorlekSyn
Verktyg
Special reports
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Estimates based on models
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): 3.8 ±0.4 se; based on size and trophs of closest relatives
Resiliens (Ref.
120179): Hög, lägsta populationsfördubblingstid mindre än 15 månader (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low to moderate vulnerability (34 of 100).
