分类 / 名称
俗名 | 同种异名 | Catalog of Fishes(属, 种) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Clupeiformes (Herrings) >
Clupeidae (Herrings, shads, sardines, menhadens)
Etymology: Ramnogaster: Greek, rhamnos, -on = blackberry + Greek, gaster = stomach.
More on author: Eigenmann.
环境:氛围 / 气候带 / 深度上下限 / 分布范围
生态学
; 淡水 大洋性. 亞熱帶的; 31°S - 38°S
分布
领土 | FAO区域 | 生态系 | 标本纪录 | 分布图 | 简介 | Faunafri
South America: Uruguay and Argentina.
南美洲: 烏拉圭與阿根廷。
大小 / 重量 / 年龄
成熟度: Lm ?  range ? - ? cm
Max length : 10.0 cm SL 雄鱼/尚未辨别雌雄; (Ref. 188)
背棘 (总数) : 0; 背的软条 (总数) : 15 - 16; 臀棘: 0; 臀鳍软条: 12 - 23. Belly sharply keeled. No distinct silver stripe along the flank and the first (anterior) supra-maxilla minute or absent (cf. Platanichthys platana). Distinguished from very similar R. arcuata of coastal waters by having fewer dorsal and pectoral fin rays and fewer gill rakers total; from small Sardinella and Harengula by the evenly rounded hind margin of the gill opening.
Body shape (shape guide): fusiform / normal; Cross section: compressed.
腹面锐利地龙骨。 没有明显的银色斑纹沿着侧面与第一个 (前面的) 上颚骨细小或不存在 (比较 孔头鲱[Platanichthys platana] ). 与沿岸水域的非常相似 R. arcuata 藉着具有区分了比较少的背部与胸鳍鳍条与较少的鳃耙总数; 从小的 沙丁鱼 与 Harengula 藉由均匀地圆的鳃裂的后缘。
Apparently confined to freshwater at mouths of rivers and their lower reaches. Presumably schooling.
显然局限于淡水在河口与他们的下游。 推测为群游。
生命周期和交配行为
成熟度 | 繁殖 | 产卵场 | 卵 | 孕卵数 | 仔鱼
南美洲: 烏拉圭與阿根廷。
Whitehead, P.J.P., 1985. FAO Species Catalogue. Vol. 7. Clupeoid fishes of the world (suborder Clupeoidei). An annotated and illustrated catalogue of the herrings, sardines, pilchards, sprats, shads, anchovies and wolf-herrings. FAO Fish. Synop. 125(7/1):1-303. Rome: FAO. (Ref. 188)
世界自然保护联盟红皮书 (Ref. 130435: Version 2025-2 (Global))
人类利用
渔业: 自给性渔业
工具
特别资料
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网络资源
基于模型的估算
系统发育多样性指数 (参考文献 82804) |
PD50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high]. |
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Bayesian length-weight
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a=0.00676 (0.00334 - 0.01367), b=3.13 (2.95 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref. 93245). |
营养阶层 (参考文献 69278) |
3.1 ±0.1 se; based on size and trophs of closest relatives |
回复力 (参考文献 120179) |
高度, 族群倍增时间少于 15个月 (Preliminary K or Fecundity.). |
渔业脆弱性 (Ref. 59153) |
Low vulnerability (22 of 100). 🛈 |
价格分类 (Ref. 80766) |
Low.
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