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); dumonti: Name 'dumonti' in honor of lberto SantosDumont, the father of aviation, who visited Iguaçu Falls and help establish the Iguaçu National Park.
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: Brazil.
サイズ / 重さ / 年齢
成熟: Lm ? range ? - ? cm
Max length : 5.6 cm SL オス/雌雄の選別がない; (Ref. 137999)
簡単な記述
検索表 | 形態学 | 形態計測学
背鰭 (合計) : 11; 臀鰭: 8 - 9. This species is distinguished from its congeners by the following set of characters: conspicuous dark-brown vertical bars present, blotches and spots along the sides of body; scaled isthmus; adipose fin present; five scales series below lateral line present; thin dark midlateral stripe present, occupying half scale height in vertical through dorsal-fin origin and one scale height on caudal peduncle; reticulated colour pattern present, with melanophores along the posterior edge of the scales; dorsal and pelvic-fin height, 19.1%-23.7% and 12.1%-18.1% of Ls and predorsal distance 44.5%-48.0% of Ls (137999).
Body shape (shape guide): elongated; Cross section: oval.
This species inhabits a fast-flowing stream with a substrate composed of rocks and pebbles of varying sizes over sandy soil.
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Stabile, B.H.M., R.B. dos Reis, A.V. de Oliveira and W.J. da Graça, 2025. A new species of Characidium (Characiformes: Crenuchidae) from the Iguaçu National Park, Rio Iguaçu basin, Paraná, Brazil. J Fish Biol. 107:454-465. (Ref. 137999)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-2 (Global))
人間の用途
水産業: 興味がない
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): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01023 (0.00452 - 0.02316), b=3.07 (2.89 - 3.25), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
栄養段階 (参照
69278): 3.4 ±0.3 se; based on size and trophs of closest relatives
漁業の脆弱性 (Ref.
59153): Low vulnerability (10 of 100).
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