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Galeus eastmani, Gecko catshark : fisheries
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Galeus eastmani
Picture by
Ho, H.-C.
Elasmobranchii (sharks and rays) >
Carcharhiniformes
(Ground sharks) >
Pentanchidae
(Deepwater catsharks)
Etymology:
Galeus:
galeos
, a small shark or dogfish according to Aristotle and others. (
See ETYFish
)
;
eastmani:
Patronym not identified, probably in honor of American geologist and paleontologist Charles Rochester Eastman (1868-1918), a specialist in fossil fishes. (
See ETYFish
)
.
More on authors:
Jordan
&
Snyder
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; bathydemersal. Deep-water; 34°N -
Northwestern Pacific: Japan to Taiwan (Ref.
127969
). Possibly Vietnam and Malaysia.
Length at first maturity / Size / Weight / Age
Maturity: L
m
36.5
, range 36 - 37 cm
Max length : 40.0 cm TL male/unsexed; (Ref.
11146
)
Dorsal
spines
(total): 0;
Dorsal
soft rays
(total): 0;
Anal
spines
: 0;
Anal
soft rays
: 0. Obscure saddle markings on body and precaudal tail, and with dark markings on the terminal and hypural caudal-fin lobes (Ref.
11146
).
A little-known, but very common shark, found in deep water near the bottom (Ref.
11146
). Maximum length of at least 40 cm TL, probably reaching 50 cm (Ref.
11146
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Oviparous, with a single egg laid per oviduct (Ref.
244
). Embryos feed solely on yolk (Ref.
50449
).
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
)
Least Concern (LC)
; Date assessed:
29 August 2019
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: minor commercial
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Zoological Record
Estimates based on models
Preferred temperature (Ref.
123201
): 2.6 - 5.8, mean 3.8 °C (based on 706 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
): 3.9 ±0.2 se; based on diet studies.
Resilience (Ref.
120179
): Low, minimum population doubling time 4.5 - 14 years (Fec assumed to be <100).
Fishing Vulnerability (Ref.
59153
): Low to moderate vulnerability (30 of 100).
Price category (Ref.
80766
):
Low
.
Nutrients (Ref.
124155
): Calcium = 11.3 [2.0, 74.3] mg/100g; Iron = 0.364 [0.077, 1.246] mg/100g; Protein = 16.8 [13.6, 19.9] %; Omega3 = 0.214 [0.087, 0.521] g/100g; Selenium = 6.88 [2.12, 20.95] μg/100g; VitaminA = 21.6 [4.6, 104.1] μg/100g; Zinc = 0.449 [0.208, 0.865] mg/100g (wet weight);
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