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); jivaro: Name 'jivaro' in honor of the Jívaro indigenous people, the inhabitants of the type locality. A noun in apposition.
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: Peru.
サイズ / 重さ / 年齢
成熟: Lm ?  range ? - ? cm
Max length : 3.6 cm SL オス/雌雄の選別がない; (Ref. 138327)
簡単な記述
検索表 | 形態学 | 形態計測学
背鰭 (合計) : 9; 臀鰭: 6; 脊つい: 33 - 35. This species is distinguished from its congeners by the following set of characters: black longitudinal band that extends along the total length of the paired fins, from the base to tip of the third unbranched and first branched rays on pectorals and first two branched rays on the pelvic fins; bony processes along length of the pectoral-fin rays, dorsally positioned, on mature and immature females and males; teeth on the premaxilla and dentary strongly tricuspid, with three well developed and similar sized cusps; completely perforated lateral-line scales; lack of a conspicuous dark narrow stripe extending from rear of opercle to end of caudal peduncle; lack of 13 or more thin conspicuous black bars from dorsum to ventral portion of body; lack of dark blotches on opercle and preopercle; remnants of bars in maturing and matures specimens slightly concave anteriorly; four series of scales above the lateral line and three or four from the lateral line to the pelvic-fin insertion; and lack of dark spots on the caudal fin (Ref. 138327).
Body shape (shape guide): elongated; Cross section: oval.
ライフサイクルと交尾行動
成熟 | 繁殖 | 放精 | 卵 | 生産力 | 幼生
Zanata, A.M., R. Britzke, V. Meza-Vargas, M.H. Hidalgo, D. Faustino-Fuster and L. Oliveira-Silva, 2025. A remarkable new Characidium (Characiformes: Crenuchidae) from tributaries of río Marañón, Loreto, Peru, with unique fin bony processes in both sexes. Neotrop. Ichthyol. 23(3):e250047. (Ref. 138327)
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): 3.3 ±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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