Clutch and egg size in Rhinogobius sp.DA inhabiting small rivers. Japan.
Clutch and egg size in Rhinogobius sp.DA inhabiting small rivers. Japan.
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栖息于小河流的Rhinogobius sp.DA 的产蛋量和卵大小。
DOI：
10.11369/jji1950.52.17
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
K. Tamada
中科院分区：
文献类型：
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作者：
K. Tamada
日本双游虾虎鱼Rhinogobius sp. DA（R.在纪伊半岛南部的小河流中生活着的黑褐型（brunneus，dark type）。离合器的大小，范围在1043和4436之间，随着母亲标准长度的增加而增加。产卵量在0.85立方毫米和1.38立方毫米之间，平均卵量在研究期间采样的8条河流之间相似。与居住在同一地区相对较大河流中的其他三种两栖吻虾虎鱼物种相比，吻虾虎鱼DA的卵相对较大，窝卵大小较小。四个物种之间的种间卵大小的变化似乎导致不同的幼虫存活率在他们的迁移到海洋。
Clutch and egg size in the Japanese amphidromous goby, Rhinogobius sp. DA (R. brunneus, dark type), inhabiting small rivers in the southern part of the Kii peninsula were examined. Clutch sizes, ranging between 1043 and 4436, increased with increasing maternal standard length. Spawned egg volume ranged between 0.85 mm3 and 1.38 mm3, mean egg volumes being similar among the eight rivers sampled during the study. Rhinogobius sp. DA had a relatively larger egg and smaller clutch size compared to those of three other amphidromous Rhinogobius species inhabiting relatively larger rivers in the same region. Inter-specihic egg size variations among the four species appear to result in differing larval survival rates during their migration to the sea.