分類 / 名稱
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Characiformes (Characins)
脂鯉目 (Characins) >
Anostomidae (Headstanders)
小口脂鯉科 (Headstanders)
Etymology: Schizodon: Greek, schizein = to divide + Greek, odous = teeth (Ref. 45335); scotorhabdotus: Specific name derived from the Greek scotos (dark), and rhabdos (rod or stick), in reference to the prominent dark lateral stripe of this species,.
環境： 環境 / 氣候帶 / 深度上下限 / 配送範圍
生態學
; 淡水 底中水層性.
South America: Río Orinoco system in Venezuela and Colombia.
初熟時的長度 / 大小 / 重量 / 年齡
成熟度: Lm ?, range 28 - ? cm
Max length : 27.1 cm SL 雄魚/尚未辨別雌雄; (Ref. 75767)
簡短描述
檢索表 | 型態特徵 | 形態測量圖
背的軟條 (總數) : 11 - 12; 臀鰭軟條: 9; 脊椎骨: 40 - 42. Can be separated from all congeners, except Schizodon isognathus, Schizodon knerii, and Schizodon nasutus, by the presence of a dark stripe running along the lateral-line-scale row from the rear of the opercle to the caudal peduncle (vs. absence of midlateral stripe in Schizodon altoparanae, Schizodon australis, Schizodon borelli, Schizodon corti, Schizodon dissimilis, Schizodon fasciatus, Schizodon intermedius, Schizodon platae, and Schizodon rostratus), and midlateral stripe extending no further anteriorly than to vertical drawn through dorsal-fin origin in Schizodon jacuiensis and Schizodon vittatus). Differs from Schizodon nasutus by a terminal or slightly upturned mouth (vs. a strongly subterminal mouth). Can be differentiated from Schizodon isognathus and Schizodon knerii by having 4 or 4.5 transverse scale rows above the lateral line to the dorsal-fin origin (vs. 6.5 scale rows [rarely 5.5 in Schizodon knerii]), 4 or 4.5 transverse scale rows below the lateral line to the anal-fin origin (vs. 5.5 scale rows [rarely 4.5 in Schizodon knerii]) and seven branched anal-fin rays (vs. eight). Differs further from Schizodon isognathus by the presence of three or four vertical dark blotches on the lateral surfaces of the body intersecting the prominent lateral stripe (vs. vertical blotches absent) and a terminal mouth in adults (vs. a slightly subterminal mouth in adults); and Schizodon knerii by having only 16 circumpeduncular scales (vs. 18-20) (Ref. 75767).
Found in lagoons, pools, small caños and cattle pastures, all relatively lentic habitats (Ref. 75767). Herbivorous, preferring macrophytes (Ref. 75767). Distinct pairs breed on densely grown weedy places (Ref. 205).
生命週期和交配行為
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
Distinct pairs breed on densely grown weedy places (Ref. 205).
Sidlauskas, B.L., J.C. Garavello and J. Jellen, 2007. A new Schizodon (Characiformes: Anostomidae) from the Río Orinoco system, with a redescription of S. isognathus from the Río Paraguay System. Copeia 2007(3):711-725. (Ref. 75767)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-2 (Global))
無危 (LC) ; Date assessed: 17 November 2020
人類使用
工具
特別的報告
下載 XML
網路資源
基於模型的估計
系統發育多樣性指數 (參考文獻
82804): PD
50 = 0.5000 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00776 (0.00349 - 0.01726), b=3.06 (2.88 - 3.24), in cm total length, based on LWR estimates for this Genus-body shape (Ref.
93245).
營養階層 (參考文獻
69278): 2.5 ±0.2 se; based on size and trophs of closest relatives
回復力 (參考文獻
120179): 中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
釣魚的脆弱性 (Ref.
59153): Low vulnerability (23 of 100).
🛈
