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Epinephelus hexagonatus, Starspotted grouper : fisheries, gamefish
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Epinephelus hexagonatus
Picture by
Randall, J.E.
Teleostei (teleosts) >
Perciformes/Serranoidei
(Groupers) >
Epinephelidae
(Groupers)
Etymology:
Epinephelus:
Greek, epinephelos = cloudy (Ref.
45335
)
.
More on author:
Forster
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; depth range 0 - 30 m (Ref.
4319
), usually 6 - ? m (Ref.
37816
). Tropical; 33°N - 31°S, 30°E - 130°W (Ref.
5222
)
Indo-West Pacific: none have been taken on the African coast, except for the specimen recorded by Randall and Heemstra 1991(Ref.
4787
) from Kenyan coast north of Kilifi Creek. It is an insular species found in most tropical Indo-Pacific islands. Absent in the Red Sea and Persian Gulf.
Length at first maturity / Size / Weight / Age
Maturity: L
m
19.0
  range ? - ? cm
Max length : 27.5 cm TL male/unsexed; (Ref.
48600
)
Dorsal
spines
(total): 11;
Dorsal
soft rays
(total): 15-17;
Anal
spines
: 3;
Anal
soft rays
: 8. This species is distinguished by the following characters: body depth 2.8-3.5 in SL (10-17 cm SL individuals); head length 2.5-2.6 in SL; preopercle rounded, ventral serrae slightly enlarged; upper edge of operculum convex; midlateral part of lower jaw with 3-5 rows of teeth; gill rakers of first gill arch 7-9 + 17-19; dorsal spines 5th-9th subequal (2.5-2.8 in HL); second anal spine 2.1-2.5 in HL, distinctly longer than third spine or depth of peduncle; caudal fin rounded; pectoral-fin rays 17-19, fin length 1.6-1.9 in HL; pelvic fins 1.8-2.1 in HL; lateral-line scales 61-70; lateral scale series 93 to 114. Colour: head and body covered with polygonal (mostly hexagonal) brown spots that tend to merge, leaving only conspicuous triangular white dots at corners of the polygons; dark spots on belly and ventral part of head more rounded and separated, and often reddish brown; 4 or 5 brownish black saddle blotches (formed by groups of darker spots) on dorsal part of body and caudal peduncle, the first 4 extending onto base of dorsal fin; irregular dark bar, formed by darker polygonal spots, on lower part of body below each saddle blotch; large brown or olive spot just behind eye, often joined to similar spot on opercle; fins with close-set dark brown or reddish brown spots and white dots, except distal half of pectoral fins with faint dark spots and no white dots; pelvic and anal fins with pale edge and dark brown submarginal band; interspinous dorsal-fin membranes with dark brown triangle and short white or pale yellow filament behind tip of each spine (Ref.
39231
,
90102
).
Common in exposed outer-reef areas in relatively shallow water. Well-camouflaged grouper, solitary (Ref 37816). Feeds mainly on fishes and crustaceans (stomatopods and brachyuran crabs) (Ref.
5222
). This fish is too small to be of commercial importance except as a food fish in artisanal fisheries. It is caught with hook-and-line, traps, spear, and gill nets (Ref.
39231
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Heemstra, P.C. and J.E. Randall
, 1993. FAO Species Catalogue. Vol. 16. Groupers of the world (family Serranidae, subfamily Epinephelinae). An annotated and illustrated catalogue of the grouper, rockcod, hind, coral grouper and lyretail species known to date. Rome: FAO. FAO Fish. Synop. 125(16):382 p. (Ref.
5222
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
28 January 2018
CITES
Not Evaluated
Not Evaluated
Threat to humans
Reports of ciguatera poisoning (Ref.
130160
)
Human uses
Fisheries: minor commercial; gamefish: yes
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Zoological Record
Estimates based on models
Preferred temperature (Ref.
123201
): 25.1 - 29.3, mean 28.4 °C (based on 2803 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00955 (0.00538 - 0.01694), b=3.00 (2.85 - 3.15), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref.
93245
).
Trophic level (Ref.
69278
): 4.1 ±0.67 se; based on food items.
Generation time: 1.2 ( na - na) years. Estimated as median ln(3)/K based on 1
growth studies.
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (K=0.9).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (17 of 100).
Price category (Ref.
80766
):
Very high
.
Nutrients (Ref.
124155
): Calcium = 59 [29, 126] mg/100g; Iron = 0.799 [0.403, 1.710] mg/100g; Protein = 18.6 [17.0, 20.0] %; Omega3 = 0.134 [0.080, 0.220] g/100g; Selenium = 30.6 [15.4, 60.6] μg/100g; VitaminA = 247 [61, 950] μg/100g; Zinc = 1.41 [0.91, 2.09] mg/100g (wet weight);
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