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Istigobius spence, Pearl goby
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Istigobius spence
Picture by
Randall, J.E.
Teleostei (teleosts) >
Gobiiformes
(Gobies) >
Gobiidae
(Gobies) > Gobiinae
Etymology:
Istigobius:
Greek, istios = sail + Latin, gobius = gudgeon (Ref.
45335
)
.
More on author:
Smith
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; brackish; reef-associated; depth range 1 - 12 m (Ref.
90102
). Tropical; 15°N - 40°S
Indo-Pacific: Mozambique, Kenya, Sri Lanka, Papua New Guinea, Australia, and Micronesia; undoubtedly more widespread.
Size / Weight / Age
Maturity: L
m
?
range ? - ? cm
Max length : 7.9 cm SL male/unsexed; (Ref.
1602
)
Dorsal
spines
(total): 7;
Dorsal
soft rays
(total): 10-11;
Anal
spines
: 1;
Anal
soft rays
: 9 - 10;
Vertebrae
: 26. Pectoral fin rays entire. Predorsal cycloid scale 7-10, ctenoid on trunk. Few spots on nape; a dusky line running from eye dorsal to sensory pore path, ending at or before pectoral fin base; wavy brown lines on the snout. Pelvic and distal part of anal fins darker in males than in females. Appressed anal fin reaching within a distance of 1-2 scales of caudal fin in male, 2-4 scales in female; appressed 2nd dorsal slightly overlapping caudal in male. Some males exhibit 3-4 vertical bars on abdomen and 2-3 horizontal bars in 1st dorsal fin (Ref.
420
); longitudinal scale series 30-32; no scales on cheek and opercle; body depth 4.9-6.1 in SL (Ref.
90102
).
Occurs in turbid coastal areas near river mouths at less than 1 m to at least 12 m, Ref. 48637.
Life cycle and mating behavior
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|
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|
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|
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Larvae
Genital papilla of male reaching anal spine. Female genital papilla truncate, ending well before origin of anal fin.
Murdy, E.O. and D.F. Hoese
, 1985. Revision of the gobiid fish genus
Istigobius
. Indo-Pac. Fish. (4):41 p. (Ref.
420
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
13 March 2015
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Zoological Record
Estimates based on models
Preferred temperature (Ref.
123201
): 25.7 - 29.3, mean 28.6 °C (based on 2615 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5010 [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
).
Trophic level (Ref.
69278
): 3.3 ±0.4 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).
Nutrients (Ref.
124155
): Calcium = 139 [69, 301] mg/100g; Iron = 0.849 [0.417, 1.558] mg/100g; Protein = 18.7 [16.7, 20.3] %; Omega3 = 0.153 [0.067, 0.292] g/100g; Selenium = 16.6 [8.1, 37.8] μg/100g; VitaminA = 145 [39, 485] μg/100g; Zinc = 2.53 [1.67, 3.75] mg/100g (wet weight);
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