分類 / Names
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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/)..
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の漂泳性; 深さの範囲 1 - ? m (Ref. 12293). Tropical
Asia: Sabah, Borneo, East Malaysia.
サイズ / 重さ / 年齢
Maturity: Lm ? range ? - ? cm
Max length : 5.1 cm SL オス/雌雄の選別がない; (Ref. 12293); 5.6 cm SL (female)
簡単な記述
検索表 | 形態学 | 形態計測学
背面の脊椎 (合計) : 1; 背鰭 (合計) : 7 - 9; 肛門の骨: 2; 臀鰭: 24 - 28; 脊つい: 29 - 31. Can be differentiated from other members of the Betta akarensis group by possessing the following combination of characters: opercle with interrupted second postorbital stripe; eye color yellow when alive; anal-fin rays 26-30 (mode 28); subdorsal scales 5 1/2-7 (mode 6); lateral scales 30-31 9mode 31); predorsal scales 22-24 (mode 23); postdorsal scales 9-11 (mode 10); preanal length 42.6-45.7% SL; head length 31.4-33.3% SL; length of anal-fin base 54.8-58.5% SL (Ref. 56613).
Facultative air-breathing (Ref. 126274); Found in shallow (less than 0.5 m depth) peat swamps with substrate consisting mainly of detritus, leaves and peat (Ref. 12293). An oral brooder (Ref. 56613).
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 幼生
Assumed to be the same as in Betta picta, i.e., the male is carying the aggs in his mouth for about 10 days.
Ng, P.K.L., 1993. On a new species of Betta (Teleostei: Belontiidae) from peat swamps in Sabah, East Malaysia, Borneo. Ichthyol. Explor. Freshwat. 4(4):289-294. (Ref. 12293)
IUCNのレッドリストの状況は (Ref. 130435)
絶滅危惧 (EN) (B1ab(iii)); Date assessed: 24 December 2018
Human uses
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インターネットの情報源
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).
栄養段階 (Ref.
69278): 3.2 ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 高い, １５か月以下の倍増期間の最小個体群 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
