分類 / 名前
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Characiformes (Characins) >
Crenuchidae (South American darters) > Characidiinae
Etymology: Characidium: Diminutive of Charax, -akos = a fish without identification (Ref. 45335).
環境:環境 / 気候帯 / 深さの範囲 / 分布範囲
生態学
; 新鮮な水 底生の漂泳性. Tropical
South America: coastal basins from Ribeira de Iguape River basin, Uruguay; Uruguay River basin.
初回成熟時の長さ / サイズ / 重さ / 年齢
成熟: Lm 67.0, range 65 - 69 cm
Max length : 8.7 cm SL オス/雌雄の選別がない; (Ref. 116915)
背鰭 (合計) : 11 - 12; 臀鰭: 20. It is distinguished from all other species of Characidium from southern Brazil, except C. sp. cf., C. zebra, in having 14 series of scales around the caudal peduncle (Ref. 27672).
Usually found in creeks or small rivers with rocky bottom and clear, fast flowing water (Ref. 27672).
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Miyazawa, C.S. and P.M. Galetti Jr., 1994. First cytogenetical studies in Characidium species (Pisces: Characiformes, Characidiinae). Cytologia 59:73-79. (Ref. 27418)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
人間の用途
用具
特記事項
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インターネットの情報源
モデルに基づく推定値
系統多様性指数 (参照 82804) |
PD50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.01072 (0.00626 - 0.01833), b=3.11 (2.96 - 3.26), in cm total length, based on LWR estimates for this species & Genus-body shape (Ref. 93245). |
栄養段階 (参照 69278) |
3.6 ±0.3 se; based on size and trophs of closest relatives |
漁業の脆弱性 (Ref. 59153) |
Low vulnerability (10 of 100). 🛈 |