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Reproductive characteristics of a landlocked goby, Rhinogobius sp. (the orange form), in the Lake Biwa water system were compared between the fluvial-lacustrine and lacustrine populations to show the relationship of the egg size to the risk of larval starvation. The comparison of both oocytes in the ovaries and spawned eggs showed that egg size is larger in the fluvial-lacustrine population than in...
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