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Trimma nasa, Nasal-bar pygmygoby
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Nasal-bar pygmygoby
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Trimma nasa
Female picture by
Winterbottom, R.
Teleostei (teleosts) >
Gobiiformes
(Gobies) >
Gobiidae
(Gobies) > Gobiinae
Etymology:
Trimma:
Greek, trimma, -atos = something crushed (Ref.
45335
)
;
nasa:
Name derived from the English word 'nasal', a bar descending gtom the front of many medieval helmets to protect the nose, in allusion to the snout stripe; noun in apposition.
.
More on author:
Winterbottom
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; demersal; depth range 0 - 41 m (Ref.
55345
), usually 0 - 20 m (Ref.
55345
). Tropical
Western Pacific: Solomon Islands, Papua New Guinea, Indonesia, Vanuatu, Fiji, New Caledonia, Australia, the Philippines, and Palau.
Size / Weight / Age
Maturity: L
m
?
range ? - ? cm
Max length : 2.3 cm SL male/unsexed; (Ref.
55345
); 2.0 cm SL (female)
Dorsal
spines
(total): 7;
Dorsal
soft rays
(total): 8;
Anal
spines
: 1;
Anal
soft rays
: 7 - 9. Diagnosis: Predorsal scales and a bony interorbital about pupil diameter in width. Second dorsal spine elongated. Fifth pelvic fin ray branched dichotomously once and 50-60% of the fourth. Scales on cheek absent; one or two scales on the upper opercle; usually 4-5 rows of scales anterior to the pelvic fin base. A large spot over the hypural region of the caudal peduncle; a dark area along the side of the body caused by peritoneal pigmentation. In all specimens, but that from Palau and New Caledonia, there is a thin, dark stripe from the upper lip to the mid region of the interorbital when preserved (white in life), a broad rounded ridge on the snout and anterior interorbital region, and a nasal sac with a tubular anterior opening and a pore-like posterior opening with a raised rim (Ref.
55345
); characterized further by having longitudinal scale series 23-24; predorsal scales 5-7; depth of body 4.3-4.6 in SL (Ref.
90102
).
Cryptobenthic, epibenthic. Collected on drop-offs, either sloping or vertical with caves. Apparently tends to congregate in loose schools close to the shelter of caves and sea fans, to which they retreat when approached, and seem to be most abundant at about 20 meter depth range. Often form mixed schools with
Trimma tevegae
(Ref.
55345
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Winterbottom, R.
, 2005. Two new species of the
Trimma tevegae
species group from the Western Pacific (Percomorpha: Gobiidae). aqua, J. Ichthyol. Aquat. Biol. 10(1):29-38. (Ref.
55345
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
11 March 2015
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Preferred temperature (Ref.
123201
): 26.5 - 29.1, mean 28 °C (based on 330 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01023 (0.00477 - 0.02194), b=3.02 (2.84 - 3.20), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245
).
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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- 20 July 2016
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