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Sargocentron macrosquamis, Bigscale squirrelfish
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Bigscale squirrelfish
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Sargocentron macrosquamis
Picture by
Randall, J.E.
Teleostei (teleosts) >
Holocentriformes
(Squirrelfishes, soldierfishes) >
Holocentridae
(Squirrelfishes, soldierfishes) > Holocentrinae
Etymology:
Sargocentron:
Greek, sargos = sargus + Greek, kentron = sting (Ref.
45335
)
;
macrosquamis:
Named for the large scales of the opercle (Ref.
27370
)
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; reef-associated; depth range 4 - 22 m (Ref.
27370
). Tropical
Western Indian Ocean: Red Sea to Mozambique and the oceanic islands.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - 4.7 cm
Max length : 9.0 cm TL male/unsexed; (Ref.
4201
)
Dorsal
spines
(total): 11;
Dorsal
soft rays
(total): 13-14;
Anal
spines
: 4;
Anal
soft rays
: 9 - 10. Body red with silvery reflections on many scales, shading to silvery white on lower part of the head, thorax, and anterior abdomen, scale edge light red; 5-6 oblique scale rows on cheek; body depth 2.3-2.7 in SL; head length (HL) 2.45-2.65 in SL; snout length 3.6-4.0 in HL; interorbital width 5.0-5.4 in HL; mouth terminal to slightly inferior; maxilla extending to a vertical at front edge of pupil or slightly before or beyond to it; upper jaw length 2.85-3.2 in HL; anterior end of nasal bone rounded; moderately large, spineless nasal fossa; upper surface of nasal bone between nasal fossa and edge of premaxillary groove with a retrorse spine; median edge of nasal bone with a retrorse spine and sometimes another anterior to it; preopercular spine 1.6-2.2 in orbit diameter, 4.75-6.4 in HL; spinules on posterior margin of preopercle 31 (on a 4.6 cm SL specimen) to 33-46 (6.25-6.85 cm); 3rd-5th dorsal spines subequal, the longest, 1.85-2.25 in HL; 3rd anal spine 1.45-1.75 in HL; broadly rounded caudal fin lobes (Ref.
27370
)
Minimum depth reported taken from Ref. 30573.
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Randall, J.E.
, 1998. Revision of the Indo-Pacific squirrelfishes (Beryciformes: Holocentridae: Holocentrinae) of the genus
Sargocentron
, with descriptions of four new species. Indo-Pac. Fish. (27):105 p. (Ref.
27370
)
IUCN Red List Status (Ref.
126983
)
Not Evaluated
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201
): 25.7 - 28.9, mean 27.5 °C (based on 467 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01660 (0.00795 - 0.03463), b=2.98 (2.81 - 3.15), in cm total length, based on LWR estimates for this Genus-BS (Ref.
93245
).
Trophic level (Ref.
69278
): 3.4 ±0.6 se; based on size and trophs of closest relatives
Resilience (Ref.
120179
): High, minimum population doubling time less than 15 months (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (10 of 100).
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