分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins)
脂鯉目 (Characins) >
Characidae (Characins; tetras)
脂鯉科 (Characins; tetras) > Stevardiinae
Etymology: Diapoma: Greek, dis, dia = through + Greek, poma = cover (Ref. 45335); obi: Named from a Guaraní word obi, meaning blue, in allusion to the ground color of the body..
Environment: milieu / climate zone / depth range / distribution range
生態學
; 淡水 底中水層性.
South America: tributaries of the río Paraná basin in Argentina.
大小 / 重量 / 年齡
Maturity: Lm ? range ? - ? cm
Max length : 5.9 cm SL 雄魚/尚未辨別雌雄; (Ref. 91033)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
脊椎骨: 37. Distinguished by the following combination of characters: anal fin with 22-24 (mode=24) branched rays; body depth at dorsal-fin origin 34.5-40.8 % SL (mean=37.9 % SL); nearly straight distal border of anal fin in matures males; and lateral line interrupted or with alternated series of perforated and non perforated scales. Other characters useful to diagnose this species include the following: 7-14 sheath scales on anal-fin base; anal-fin base length 2.9-3.4 in SL; interorbital width 2.7-2.9 in HL; 34-38 scales on longitudinal series; horizontal eye diameter 35.9-42.1% SL; snout length 24.0-27.3 % HL; upper jaw length 42.0-46.9% HL; maxillary teeth 3-6; pelvic-fin length 14.5-18.1% SL; snout to pelvic-fin origin 44.4-50.6% SL; snout to anal-fin origin 59.4-65.3% SL; snout to pelvic-fin origin 44.4-50.6% SL (Ref. 91033).
The localities where the species were found had a turbid and rapidly flowing water
after heavy rain. The bottom is composed of mud, sand and stones (Ref. 91033).
Life cycle and mating behavior
Maturities | 繁殖 | Spawnings | Egg(s) | Fecundities | 仔魚
Casciotta, J., A. Almirón, L. Piálek and O. Říčan, 2012. Cyanocharax obi, a new species (Characiformes: Characidae) and the first record of the genus from tributaries of the río Paraná basin, Argentina. Zootaxa 3391:39-51. (Ref. 91033)
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Estimates based on models
Phylogenetic diversity index (Ref.
82804): PD
50 = 0.5039 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01905 (0.00769 - 0.04720), b=2.97 (2.75 - 3.19), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (Ref.
69278): 3.0 ±0.4 se; based on size and trophs of closest relatives
回復力 (Ref.
120179): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
