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Betta spilotogena
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drawing shows typical species in Osphronemidae.
Teleostei (teleosts) >
Anabantiformes
(Gouramies, snakeheads) >
Osphronemidae
(Gouramies) > Macropodusinae
Etymology:
Betta:
Malay/Javanese origin. Bleeker (1850, 1858) indicates Ikan Wadder Bettah as the local name of
Betta trifasciata
Bleeker, 1849 (now
Betta picta
, Valenciennes, 1846) in the Ambarawa Javanese dialect. Ikan Wader is a common Javanese name for smaller freshwater fishes, especially cyprinids (already used in Old Javanese). See Blust, R. & Trussel, S. Austronesian Comparative Dictionary. Web Edition (https://www.trussel2.com/acd/).
.
More on authors:
Ng
&
Kottelat
.
Environment: milieu / climate zone / depth range / distribution range
Ecology
Freshwater; benthopelagic; depth range 1 - ? m (Ref.
13093
). Tropical
Asia: known only from Pulau Bintan and Pulau Singkep, Indonesia.
Size / Weight / Age
Maturity: L
m
 
?
  range ? - ? cm
Max length : 7.0 cm SL male/unsexed; (Ref.
13093
)
Short description
Morphology
|
Morphometrics
Dorsal
spines
(total): 1;
Dorsal
soft rays
(total): 8;
Anal
spines
: 2;
Anal
soft rays
: 27. Distinguished from
Betta chloropharynx
in the following characters: median black throat spot (vs. two rounded black marks); spotted opercle (vs. non-spotted); opercle with black lower margin (vs. yellow margin). Differs from
Betta hipposideros
in the following characters: median black throat (vs. horse-shoe shape mark); spotted opercle (vs. non-spotted); opercle with black lower margin (vs. yellow or brown); more postdorsal scales (mode 10 vs. 9 1/2). Can be differentiated from
Betta renata
in the following characters: black median spot (vs. kidney-shaped mark); absence of dorsal and caudal transverse bars (vs. presence); fewer subdorsal scales ( mode 5 1/2 vs. 6 1/2); fewer postdorsal scales (mode 10 vs. 12); more anal fin rays (mode 30 vs. 29); and more lateral scales (mode 32 vs. 31) (Ref.
56386
).
Facultative air-breathing (Ref.
126274
); Inhabits swamps as well as adjacent streams, usually in relatively shallow water about a meter or so in depth with dense vegetation growing along the banks and under shade.
Life cycle and mating behavior
Maturity
|
Reproduction
|
Spawning
|
Eggs
|
Fecundity
|
Larvae
Ng, P.K.L. and M. Kottelat
, 1994. Revision of the
Betta waseri
species group (Teleostei: Belontiidae). Raffles Bull. Zool. 42(3):593-611. (Ref.
13093
)
IUCN Red List Status (Ref.
130435
)
Endangered (EN)
(B1ab(iii)); Date assessed:
07 January 2019
CITES
Not Evaluated
Not Evaluated
Threat to humans
Harmless
Human uses
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Estimates based on models
Phylogenetic diversity index (Ref.
82804
): PD
50
= 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01000 (0.00376 - 0.02663), b=2.97 (2.75 - 3.19), 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).
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- 20 July 2016
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