分類 / Names
共通名の | 類義語 | Catalog of Fishes(部類, 種) | ITIS | CoL | WoRMS | Cloffa
Environment: milieu / climate zone / depth range / distribution range
生態学
; 新鮮な水 底生の漂泳性; pH range: 6.0 - 6.5; dH range: 4 - 15. Tropical; 22°C - 28°C (Ref. 2059)
South America: Magdalena River basin; entire extent of the Amazon and Orinoco River basins below approximately 500 m elevation including Napo River of western Ecuador and Madre de Dios River of Peru; all drainages of the Guianas Shield; Atlantic drainages of northeastern Brazil (Tocantins, Parnaíba, Pindaré, Itapicuru, and Salgado rivers); São Francisco River basin; Rio de Janeiro, Brazil; Paraguay-Paraná River basin.
Length at first maturity / サイズ / 重さ / 年齢
Maturity: Lm 25.0, range 20 - 30 cm
Max length : 141 cm TL オス/雌雄の選別がない; (Ref. 39524)
簡単な記述
検索表 | 形態学 | 形態計測学
臀鰭: 195 - 300.
Occurs in swamps, creeks, and river with lentic waters. Preys on small invertebrates, particularly the larvae of aquatic insects (Ref. 12225). Breeds before the start of the rainy season (Ref. 10645) or during the rainy season, with a fecundity count of 6473 eggs (Ref. 10643). Males persistently defend their territory and apparently make electric signals (by increased electric organ discharge (EOD) rates and interruptions thereof) to females passing by to draw in a spawning partner (Ref. 10605). Mature females' EODs are of higher frequencies than mature males (Ref. 10645). Plasma androgens modulate the EOD frequency during the breeding season (Ref. 10767). Embryos hatch on day 4; larvae begin to feed on day 11. The electric organ and electroreceptors are both present in the larva at the time of first exogenous feeding (Ref. 10605). Seems to reach sexual maturity at 1 year of age, based on breeding experiments (Ref. 10011).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Eggs of 3 mm diameter are deposited among plants. Larvae hatch after 4 days and start feeding after 11 days.
Ortega, H. and R.P. Vari, 1986. Annotated checklist of the freshwater fishes of Peru. Smithson. Contrib. Zool. (437):1-25. (Ref. 6329)
IUCNのレッドリストの状況は (Ref. 130435: Version 2024-2)
Human uses
水産業: 商業; 水族館・水槽: 商業
用具
特記事項
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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 = 0.5020 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00302 (0.00194 - 0.00471), b=2.81 (2.68 - 2.94), in cm total length, based on LWR estimates for this species & (Sub)family-body (Ref.
93245).
栄養段階 (Ref.
69278): 3.2 ±0.40 se; based on food items.
Fishing Vulnerability (Ref.
59153): Very high vulnerability (84 of 100).
