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Megaleporinus obtusidens
图片提供人 Equipe de Ictiologia do Nupélia
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图片提供人 Equipe de Ictiologia do Nupélia
分类 / 名称 俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei > Characiformes (Characins) > Anostomidae (Headstanders) > Leporininae
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.
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.
环境：氛围 / 气候带 / 深度上下限 / 分布范围 生态学
; 淡水 底中水层性; 河川洄游 (Ref. 138143). 亞熱帶的
分布 领土 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | Faunafri
South America: Paraná, La Plata and São Francisco, Uruguay, Paraguay, Guaíba and Parnaíba River basins
南美洲: Parana ， La Plata 與 Sao 弗朗西斯科河流域。
南美洲: Parana ， La Plata 與 Sao 弗朗西斯科河流域。
首次成熟时的长度 / 大小 / 重量 / 年龄
成熟度: Lm 21.6 range ? - ? cm
Max length : 76.0 cm TL 雄鱼/尚未辨别雌雄; (Ref. 79585); 最大体重: 5.8 kg (Ref. 79585)
Max length : 76.0 cm TL 雄鱼/尚未辨别雌雄; (Ref. 79585); 最大体重: 5.8 kg (Ref. 79585)
简单描述 检索表 | 型态特徵 | 形态测量图
背的软条 (总数) : 11 - 12; 臀鳍软条: 10 - 11; 脊椎骨: 39. Can be diagnosed from most congeners, except Leporinus amblyrhynchus, L. conirostris, L. desmotes, L. despaxi, L. elongatus, L. jatuncochi, L. macrocephalus, L. muyscorum, L. piavussu, L. reinhardti, L. trifasciatus and L. wolfei, by possessing three teeth on each premaxilla and dentary (tooth formula 3/3; vs. tooth formulae 3/4, 4/4 or 4/3). Differs from Leporinus amblyrhynchus, L. conirostris, L. desmotes, L. despaxi, L. jatuncochi, L. macrocephalus, L. muyscorum, L. reinhardti, L. trifasciatus and L. wolfei by having three dark rounded blotches on the body and dark transverse bars usually persistent in large specimens (vs. body with a dark midlateral stripe in L. amblyrhynchus, and L. despaxi; transverse dark bands in L. desmotes and L. jatuncochii; body pale except for a single dark blotch on the caudal peduncle in L. conirostris; first blotch, below the dorsal fin, transversely elongated in L. macrocephalus, L. trifasciatus and L. wolfei; transverse bars faded in large specimens of L. muyscorum; and the blotch on the caudal peduncle longitudinally elongated, not rounded, sometimes making contact with the second blotch in L. reinhardti). Can be further distinguished from Leporinus muyscorum by having six or seven scale rows between lateral line and dorsal-fin origin (vs. five); from Leporinus elongatus by having 16 scales rows around the caudal peduncle (vs. 12). Differs from a similar species Leporinus piavussu by having 41 to 43, rarely 44 perforated scales in the lateral line (vs. 39 to 40, rarely 41). Individuals of Leporinus obtusidens from the upper Rio Paraná basin can be separated from individuals of L. piavussu by having mouth directed somewhat or entirely downward, its cleft at horizontal through ventral orbital margin or slightly below (vs. mouth terminal, its cleft above horizontal through ventral orbital margin) (Ref. 93038)
Body shape (shape guide): elongated.
Body shape (shape guide): elongated.
Adults inhabit medium to large rivers accomplishing very long reproductive and feeding
migration in rivers of the Paraná basin (Ref. 93038). They also occur in ponds. Omnivorous (Ref. 79585). Distinct pairs breed on densely grown weedy places (Ref. 205).
出现于池塘。
出现于池塘。
生命周期和交配行为 成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
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。
主要参考文献
上传您的参考资料 | 参考文献 | 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)
CITES
Not Evaluated
对人类的威胁
无害处的
人类利用
渔业: 商业性; 养殖: 商业性; 游钓鱼种: 是的
FAO - Publication: search | FishSource |
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基于模型的估算
|
系统发育多样性指数 (参考文献 82804) |
PD50 = 0.5010 [Uniqueness, from 0.5 = low to 2.0 = high]. |
| Bayesian length-weight | a=0.01175 (0.00958 - 0.01441), b=3.08 (3.04 - 3.12), in cm total length, based on LWR estimates for this species (Ref. 93245). |
|
营养阶层 (参考文献 69278) |
3.2 ±0.17 se; based on food items. |
|
回复力 (参考文献 120179) |
中等的, 族群倍增时间最少 1.4 - 4.4年 (K=0.19). |
|
渔业脆弱性 (Ref. 59153) |
High vulnerability (61 of 100). 🛈 |
|
价格分类 (Ref. 80766) |
Unknown. |
|
营养素 (Ref. 124155) |
Calcium = 43.2 [8.4, 104.9] mg/100g; Iron = 0.983 [0.444, 2.393] mg/100g; Protein = 18.6 [16.5, 21.0] %; Omega3 = 0.277 [0.104, 0.741] g/100g; Selenium = 21.6 [7.7, 57.4] μg/100g; VitaminA = 28 [8, 94] μg/100g; Zinc = 1.24 [0.81, 1.89] mg/100g (wet weight); |