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Megaleporinus elongatus (Valenciennes, 1850)

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Megaleporinus elongatus
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分類 / Names 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: Megaleporinus: Name from Greek 'mega' meaning large or largest, plus Leporinus, the genus which most species (now in this genus) were previously assigned; refrring to the large size of most congeners.
More on author: Valenciennes.

Environment: milieu / climate zone / depth range / distribution range 生態學

; 淡水 底中水層性; 河川洄游 (Ref. 51243). 亞熱帶的

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South America: Known only from the Rio Jequitinhonha and Rio Pardo in Brazil. Record from São Francisco River, the type locality in the original description, seems to be erroneous (Ref. 93038). Reported from Paraná and La Plata basins (Ref. 36801).
南美洲: Parana ， La Plata 與 Sao 弗朗西斯科河流域。

Length at first maturity / 大小 / 重量 / 年齡

Maturity: Lm 20.8  range ? - ? cm
Max length : 50.0 cm TL 雄魚/尚未辨別雌雄; (Ref. 115169)

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: 10 - 11; 脊椎骨: 34. Distinguished from all species of Leporinus , exceptL. amblyrhynchus , by having the combination of three teeth on each premaxilla and dentary (tooth formula 3/3) and 12 scale rows around the caudal peduncle (vs. tooth formulae 4/4, 3/4 or 4/3, and 14 or 16 scale rows around the caudal peduncle). Can be diagnosed from Leporinus amblyrhynchus by having three dark blotches on the lateral line (vs. dark longitudinal stripe along the lateral line). Additional characters useful to diagnose Leporinus elongatus include 36 or 37 pored scales on the lateral line, 4 scales rows from the dorsal fin origin to the lateral line and 4 from the lateral line to the base of the pelvic fin (Ref. 93038).

生物學特性     字彙 (例如 epibenthic)

Distinct pairs breed on densely grown weedy places (Ref. 205).

Life cycle and mating behavior 成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚

Distinct pairs breed on densely grown weedy places (Ref. 205).南美洲: Parana ， La Plata 與 Sao 弗朗西斯科河流域。

主要參考資料 Upload your references | 參考文獻 | 合作者 : Garavello, Júlio | 合作者

Ramirez, J.L., J.L.O. Birindelli and P.M. Galetti Jr., 2017. A new genus of Anostomidae (Ostariophysi: Characiformes): Diversity, phylogeny and biogeography based on cytogenetic, molecular and morphological data. Molecular Phylogenetics and Evolution, 107: 308-323. (Ref. 113781)

IUCN 瀕危狀態 (Ref. 130435: Version 2024-2)

  無危 (LC) ; Date assessed: 07 November 2018

CITES

Not Evaluated

CMS (Ref. 116361)

Not Evaluated

對人類具威脅

  無害處的





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Trophic ecology
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Estimates based on models

Phylogenetic diversity index (Ref. 82804):  PD50 = 0.5010   [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.01072 (0.00841 - 0.01365), b=3.08 (3.03 - 3.13), in cm total length, based on LWR estimates for this species (Ref. 93245).
營養階層 (Ref. 69278):  2.5   ±0.1 se; based on size and trophs of closest relatives
回復力 (Ref. 120179):  中等的, 族群倍增時間最少 1.4 - 4.4年 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref. 59153):  Moderate vulnerability (40 of 100).