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Randallichthys filamentosus, Randall's snapper : fisheries
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Randall's snapper
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Randallichthys filamentosus
Picture by
Randall, J.E.
Teleostei (teleosts) >
Eupercaria/misc
(Various families in series Eupercaria) >
Lutjanidae
(Snappers) > Etelinae
Etymology:
Randallichthys:
After John Randall, marine biologist, Bishop Museum of Hawaii; he worked in systematic ichthyology with fishes of Indopacific region + Greek, ichthys = fish
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; benthopelagic; depth range 150 - 300 m (Ref.
55
). Deep-water; 35°N - 24°S, 121°E - 147°W (Ref.
55
)
Pacific Ocean: known only from the Hawaiian Islands, Cook Islands, New Caledonia, and Okinawa, Japan but probably widespread in the area. Recently recorded from Tonga (Ref.
53797
). Eastern Indian Ocean: Scott Reefs, northwestern Australia (Ref.
82665
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 50.0 cm SL male/unsexed; (Ref.
9821
); common length : 40.0 cm SL male/unsexed; (Ref.
9821
)
Dorsal
spines
(total): 10;
Dorsal
soft rays
(total): 12;
Anal
spines
: 3;
Anal
soft rays
: 9. Head blunt. Interorbital space flat. Eye large. Preorbital bone relatively narrow. Snout short. Lower jaw protruding. Pectoral fins short, not reaching level of anus. Lower lobe of caudal fin with some rays excessively produced and filamentous in young. Scale rows on back parallel to lateral line. Overall color rosy red with a yellowish tinge; the dorsal fin grayish, the outer edge of its spinous portion black; the outer edge of the pelvic fins also black.
Adults are found on rocky bottoms in relatively deep water (Ref.
55
). Marketed fresh (Ref.
55
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Allen, G.R.
, 1985. FAO Species Catalogue. Vol. 6. Snappers of the world. An annotated and illustrated catalogue of lutjanid species known to date. FAO Fish. Synop. 125(6):208 p. Rome: FAO. (Ref.
55
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
05 March 2015
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
): 13.3 - 23.4, mean 19.3 °C (based on 11 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 1.0000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01549 (0.00716 - 0.03351), b=2.95 (2.77 - 3.13), 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
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Moderate vulnerability (44 of 100).
Price category (Ref.
80766
):
Very high
.
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- 20 July 2016
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