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Eleotris fusca, Dusky sleeper : fisheries, aquarium
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Eleotris fusca
Picture by
Ramani Shirantha
Teleostei (teleosts) >
Gobiiformes
(Gobies) >
Eleotridae
(Bully sleepers)
Etymology:
Eleotris:
The name of a Nile fish, eleotris (Ref.
45335
)
.
More on author:
Forster
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Marine; freshwater; brackish; demersal; amphidromous (Ref.
51243
); depth range 0 - 5 m (Ref.
86942
). Tropical; 25°C - ? (Ref.
2059
); 45°N - 27°S
Indo-West Pacific: throughout the Indo-Pacific, from east African coasts to Philippines, Melanesia and Polynesia (Ref.
6802
); east African coast south to Transkei (Ref.
52193
).
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 26.0 cm TL male/unsexed; (Ref.
5493
)
Dorsal
spines
(total): 7;
Dorsal
soft rays
(total): 8;
Anal
spines
: 1;
Anal
soft rays
: 8. Diagnosis: Longitudinal line scales 57-68; preopercular spine present; 8-10 gillrakers on lower part of first branchial arch (Ref.
5493
,
79840
). Dark brown to black in color; horizontal lines on body; young with spotted fins (Ref.
5493
).
Adults inhabit lagoons, estuaries and freshwater (Ref.
6028
,
48637
,
79840
). They occur in the lower reaches of freshwater streams, usually on mud bottoms (Ref.
44894
). Juveniles are found mainly among mangrove roots in the more saline areas of lagoons and estuaries (Ref.
6028
,
79840
). Carnivorous (Ref.
79840
). Marketed fresh (Ref.
12693
).
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Spawns eggs on submerged plants with small leaves. Female tends and fans the eggs until hatching and loosely guards the fry for a few days thereafter.
Maugé, L.A.
, 1986. Eleotridae. p. 389-398. In J. Daget, J.-P. Gosse and D.F.E. Thys van den Audenaerde (eds.) Check-list of the freshwater fishes of Africa (CLOFFA). ISNB, Brussels; MARC, Tervuren; and ORSTOM, Paris. Vol. 2. (Ref.
6802
)
IUCN Red List Status (Ref.
130435
)
Least Concern (LC)
; Date assessed:
23 August 2018
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
Fisheries: minor commercial; aquarium: commercial
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Zoological Record
Estimates based on models
Preferred temperature (Ref.
123201
): 25.4 - 29.3, mean 28.5 °C (based on 3082 cells).
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Trophic level (Ref.
69278
): 3.8 ±0.3 se; based on diet studies.
Resilience (Ref.
120179
): Medium, minimum population doubling time 1.4 - 4.4 years (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153
): Low vulnerability (16 of 100).
Price category (Ref.
80766
):
Unknown
.
Nutrients (Ref.
124155
): Calcium = 444 [120, 988] mg/100g; Iron = 0.785 [0.362, 1.591] mg/100g; Protein = 17.5 [15.4, 19.9] %; Omega3 = 0.137 [0.071, 0.258] g/100g; Selenium = 59.5 [24.6, 138.4] μg/100g; VitaminA = 29.2 [7.4, 110.8] μg/100g; Zinc = 1.86 [1.16, 2.89] mg/100g (wet weight); based on
nutrient studies.
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