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Apristurus exsanguis
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Apristurus exsanguis
Picture by
Duffy, C.
Elasmobranchii (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
)
;
exsanguis:
ex
(L.), out of;
sanguis
(L.), blood, i.e., bloodless or lifeless, referring to its characteristic pale coloration and flaccid body. (
See ETYFish
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathydemersal; depth range 560 - 1200 m (Ref.
40896
). Deep-water
Southwest Pacific: New Zealand.
Length at first maturity / Size / Weight / Age
Maturity: L
m
67.5
, range 65 - 70 cm
Max length : 90.8 cm TL male/unsexed; (Ref.
40896
)
Short description
Morphology
|
Morphometrics
Spiral valve turns 12-15; monospondylous vertebrae 40-47; nostril diameter always greater than inter-nostril width; posterior tip of pectoral fin anterior to mid-point of paired fin interspace; the distance between axils of dorsal fins about equal to the anal fin base length; area of the first dorsal fin equal to or slightly less than the area of second; anal fin low with a moderately long base. Pale gray to pale brown in color.
Oviparous (Ref.
50449
). Minimum depth from Ref. 58018.
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Oviparous, paired eggs are laid. Embryos feed solely on yolk (Ref.
50449
).
Sato, K., K. Nakaya and A.L. Stewart
, 1999. A new species of the deep-water catshark genus
Apristurus
from New Zealand waters (Chondrichthyes: Scyliorhinidae). J. Roy. Soc. New Zealand 29(4):325-335. (Ref.
40896
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
21 June 2017
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201
): 4.9 - 8.1, mean 7 °C (based on 26 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
).
Trophic level (Ref.
69278
): 4.0 ±0.4 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): Very Low, minimum population doubling time more than 14 years (Fec assumed to be <10).
Fishing Vulnerability (Ref.
59153
): High vulnerability (56 of 100).
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Page last modified by :
mrius-barile
- 20 July 2016
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