分類 / Names
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Characiformes (Characins) >
Crenuchidae (South American darters) > Characidiinae
Etymology: Characidium: Diminutive of Charax, -akos = a fish without identification (Ref. 45335); travassosi: Named for Haroldo Travassos, deceased Brazilian ichthyologist, in recognition to the contributions he made for the taxonomy of the genus Characidium (Ref. 128858).
Eponymy: Dr Haroldo Pereira Travassos (1922–1977) was an ichthyologist, a zoologist and a physician at the National Museum of Brazil (1942–1977), becoming Titular Professor of the Federal University of Rio de Janeiro (1969). [...] (Ref. 128868), visit book page.
Environment: milieu / climate zone / 深さの範囲 / distribution range
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. 128858)
簡単な記述
検索表 | 形態学 | 形態計測学
脊つい: 35 - 37. This species can be distinguished from its congeners by having naked isthmus (except C. helmeri) with 15-18 principal caudal-fin rays (vs. 19 princial caudal-fin rays) and 10-12 total pectoral-fin rays (vs. 13 or more total pectoral-fin rays). It differs from C. helmeri by the following set of characters: having a slender body; tip of pectoral fin not reaching origin of pelvic fin; tip of pelvic fin not reaching beyond anus, presence of well developed supraorbital; vertically elongated dashes on sides of body absent; and higher number of pored lateral-line scales (Ref. 128858).
Cross section: oval.
Found in small cold-water creeks or highland streams (Ref. 128858).
Life cycle and mating behavior
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Melo, M.R.S., P.A. Buckup and O.T. Oyakawa, 2016. A new species of Characidium Reinhardt, 1867 (Characiformes: Crenuchidae) endemic to the Atlantic forest in Paraná State ,southern Brazil. Neotrop. Ichthyol. 14(3):e160014 (Ref. 128858)
IUCNのレッドリストの状況は (Ref. 130435: Version 2025-1)
Human uses
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 (参照
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00977 (0.00424 - 0.02252), b=3.10 (2.92 - 3.28), 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
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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