分類 / Names
俗名 | 同種異名 | Catalog of Fishes(屬, 種) | ITIS | CoL | WoRMS | Cloffa
Teleostei >
Clupeiformes (Herrings)
鯡形目 (Herrings) >
Clupeidae (Herrings, shads, sardines, menhadens)
鯡科 (Herrings, shads, sardines, menhadens)
Etymology: Ramnogaster: Greek, rhamnos, -on = blackberry + Greek, gaster = stomach.
More on author: Eigenmann.
Environment: milieu / climate zone / 深度上下限 / distribution range
生態學
; 淡水 大洋性. 亞熱帶的; 31°S - 38°S
分布
國家 | FAO區域 | 生態系 | 發現紀錄 | 分布圖 | 簡介 | Faunafri
South America: Uruguay and Argentina.
南美洲: 烏拉圭與阿根廷。
大小 / 重量 / 年齡
成熟度: Lm ? range ? - ? cm
Max length : 10.0 cm SL 雄魚/尚未辨別雌雄; (Ref. 188)
背棘 (總數) : 0; 背的軟條 (總數) : 15 - 16; 臀棘: 0; 臀鰭軟條: 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.
腹面銳利地龍骨。 沒有明顯的銀色斑紋沿著側面與第一個 (前面的) 上顎骨細小或不存在 (比較 孔頭鯡〔Platanichthys platana〕 ). 與沿岸水域的非常相似 R. arcuata 藉著具有區分了比較少的背部與胸鰭鰭條與較少的鰓耙總數; 從小的 沙丁魚 與 Harengula 藉由均勻地圓的鰓裂的後緣。
Apparently confined to freshwater at mouths of rivers and their lower reaches. Presumably schooling.
顯然侷限於淡水在河口與他們的下游。 推測為群游。
Life cycle and mating behavior
成熟度 | 繁殖 | 產卵場 | 卵 | 孕卵數 | 仔魚
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)
IUCN 瀕危狀態 (Ref. 130435: Version 2025-1)
無危 (LC) ; Date assessed: 14 October 2019
人類使用
漁業: 自給性漁業
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Estimates based on models
Phylogenetic diversity index (參考文獻
82804): PD
50 = 0.7500 [Uniqueness, from 0.5 = low to 2.0 = high].
Bayesian length-weight: a=0.00676 (0.00339 - 0.01349), b=3.13 (2.95 - 3.31), in cm total length, based on LWR estimates for this (Sub)family-body shape (Ref.
93245).
營養階層 (參考文獻
69278): 3.1 ±0.1 se; based on size and trophs of closest relatives
回復力 (參考文獻
120179): 高度, 族群倍增時間少於 15個月 (Preliminary K or Fecundity.).
Fishing Vulnerability (Ref.
59153): Low vulnerability (10 of 100).
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