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Lethrinus rubrioperculatus, Spotcheek emperor : fisheries
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Lethrinus rubrioperculatus
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Randall, J.E.
Teleostei (teleosts) >
Eupercaria/misc
(Various families in series Eupercaria) >
Lethrinidae
(Emperors or scavengers) > Lethrininae
Etymology:
Lethrinus:
Greek, lethrinia, a fish pertaining to genus Pagellus
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; non-migratory; depth range 10 - 198 m (Ref.
86942
). Tropical; 38°N - 31°S, 30°E - 139°W
Indo-Pacific: East Africa to south Korea in the Yellow Sea, and the Marquesas Islands.
Length at first maturity / Size / Weight / Age
Maturity: L
m
23.0
, range 20 - 26 cm
Max length : 57.0 cm FL male/unsexed; (Ref.
125599
); common length : 30.0 cm TL male/unsexed; (Ref.
2295
); max. published weight: 3.1 kg (Ref.
125599
)
Dorsal
spines
(total): 10;
Dorsal
soft rays
(total): 9;
Anal
spines
: 3;
Anal
soft rays
: 8. This species is distinguished by the following characters: body moderately elongate, its depth 3-3.4 times in standard length; head length 1.1-1.3 times in body depth, 2.6-3 times in SL, dorsal profile near eye convex without a distinct hump; snout length 1.8-2.1 times in HL, measured without the lip the snout is 0.7-0.9 times in cheek height, its dorsal profile nearly straight or slightly concave, snout angle relative to upper jaw between 54° and 65°; interorbital space flat or slightly convex; posterior nostril a longitudinal oblong opening, closer to orbit than anterior nostril; eye situated close or slightly removed from dorsal profile, its length 3.9-4.7 times in HL; cheek height 2.4-3.3 times in HL; lateral teeth in jaws conical; outer surface of maxilla smooth or with a longitudinal ridge; D X,9 with the 3rd dorsal-fin spine the longest, its length 2.4-2.7 times in body depth; A III,8 with the first soft ray usually the longest, its length shorter than length of base of soft-rayed portion of anal fin and 1.4-1.8 times in length of entire anal-fin base; pectoral-fin rays 13; pelvic-fin membranes between rays closest to body without dense melanophores; cheek without scales; 47-49 lateral-line scales; 4 ½ scale rows between lateral line and base of middle dorsal-fin spines; 15-16 scale rows in transverse series between origin of anal fin and lateral line; usually 15 rows in lower series of scales around caudal peduncle; 7-10 scales in supratemporal patch; inner surface of pectoral-fin base without scales; posterior angle of operculum with a wide scaleless area. Colour of body olive grey or brown, with scattered irregular small black blotches; lips and a spot on upper edge of operculum usually red; fins pale or pinkish (Ref.
114226
).
Found over sand and rubble areas of outer reef slopes (Ref.
30573
). Feeds mainly on crustaceans, fish, echinoderms and mollusks (Ref.
30573
). In New Caledonia, spawning peaks are observed in December and a fairly high percentage of gonads in advanced stages of maturity occurs between October and February (Ref.
9775
). Caught mostly by handline, trap, and trawl. Marketed mostly fresh. An excellent food fish (Ref.
114226
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Oviparous (Ref.
205
). Also Ref. 103751.
Carpenter, K.E. and G.R. Allen
, 1989. FAO Species Catalogue. Vol. 9. Emperor fishes and large-eye breams of the world (family Lethrinidae). An annotated and illustrated catalogue of lethrinid species known to date. FAO Fish. Synop. 125(9):118 p. Rome: FAO. (Ref.
2295
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
09 March 2015
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: highly commercial
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Estimates based on models
Preferred temperature (Ref.
123201
): 22.4 - 28.3, mean 26.9 °C (based on 844 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01445 (0.01230 - 0.01698), b=2.97 (2.93 - 3.01), in cm total length, based on LWR estimates for this species (Ref.
93245
).
Trophic level (Ref.
69278
): 3.8 ±0.0 se; based on diet studies.
Generation time: 5.0 ( na - na) years. Estimated as median ln(3)/K based on 2
growth studies.
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Low to moderate vulnerability (33 of 100).
Price category (Ref.
80766
):
Very high
.
Nutrients (Ref.
124155
): Calcium = 41.7 [28.6, 61.1] mg/100g; Iron = 0.847 [0.566, 1.224] mg/100g; Protein = 20.2 [17.6, 22.4] %; Omega3 = 0.151 [0.108, 0.210] g/100g; Selenium = 55.5 [35.5, 88.8] μg/100g; VitaminA = 26.9 [5.9, 138.7] μg/100g; Zinc = 1.91 [1.47, 2.46] mg/100g (wet weight);
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