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Grasseichthys gabonensis  Géry, 1964

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Grasseichthys gabonensis
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drawing shows typical fish in this Family.

分类 / Names 俗名 | 同种异名 | Catalog of Fishes (gen., sp.) | ITIS | CoL | WoRMS | Cloffa

Actinopterygii 辐鳍鱼纲 (条鳍鱼) > Gonorynchiformes (Milkfish) > Kneriidae (Shellears)
Etymology: Grasseichthys: Greek, grassos, -ou = stink, dirt + Greek, ichthys = fish (Ref. 45335).   More on author: Géry.

环境 / 气候 / 范围 生态学

; 淡水 底中水层性.    , preferred ?

分布 国家 | FAO区域 | 生态系 | 标本纪录 | Point map | 简介 | Faunafri

Africa: scattered localities in the Ivindo and the larger Ogowe basin of Gabon; reports from the central Congo basin refer to another species (Ref. 81636).

大小 / 重量 / 年龄

Maturity: Lm ?  range ? - ? cm
Max length : 2.1 cm SL 雄鱼/尚未辨别雌雄; (Ref. 42473)

简单描述 型态特徵 | 形态测量图

背棘 (总数): 0; 背的软条 (总数): 7-8; 臀棘 0; 臀鳍软条: 9 - 10; 脊椎骨: 35 - 36. Diagnosis: very small and larval in appearance; body elongate, laterally compressed, shallow (body depth 17.9-20.0% SL in females and 15.2-17.9% SL in males); scaleless; head small (head length 18.0-22.7% SL), with small, terminal mouth and large eyes; teeth absent; interorbital distance narrow (11.9-12.9% HL); gill opening short and located above pectoral fin; pectoral fins positioned ventrally and often splayed out from the body in preserved specimens; caudal peduncle long, with keels of transparent tissue, apparently anterior extensions of caudal fin membrane, reaching forward on both dorsal and ventral edge (ventral extension is more developed); caudal fin forked, with 16 rays, including an unbranched ray on dorsal and ventral edge; fin spines lacking; 2 branchiostegal rays; body semi-translucent, with myomeres clearly visible; lateral line absent; epibranchial organ reduced or absent (Ref. 81636).

生物学特性     字汇 (例如 epibenthic)

Open water species, not burrying in sand; forms schools; spawns during the raining season, during which it may be very abundant, forming aggregations in open water areas in the swamps; females of 20-24mm carry about 40 round, ripe eggs of about 0.4mm diameter; males mature at a size of about 18mm total length (Ref. 91379).

Life cycle and mating behavior 成熟度 | 繁殖 | 产卵场 | | 孕卵数 | 仔鱼


主要参考文献 Upload your references | 参考文献 | 合作者 | 合作者

Géry, J., 1965. Poissons du bassin de l'Ivindo. I - Les biotopes. Biol. Gabon. 1(4):375-384. (Ref. 91379)

世界自然保护联盟红皮书 (Ref. 115185)

CITES (Ref. 94142)

Not Evaluated

对人类的威胁

 




人类利用

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