ネズッポ科魚類3種の卵発生とふ化仔魚

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タイトル別名
  • Embryonic Development and Larvae of Three Dragonets
  • ネズッポカ ギョルイ 3シュ ノ ラン ハッセイ ト フカ シギョ エイブン

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Eggs and larvae of Callionymus flagris, C. richardsoni, and C. ornatipinnis were observed. The eggs of these species have the following characters in common, i.e., spherical shape with a diameter of about 0.7mm, a partially segmented yolk, lack of oil globule, and egg-membrane with a hexagonal pattern. Eggs of C. flagris can be distinguished from eggs of other species by the size of its hexagonal pattern.<br> Processes of embryonic development are almost the same as known in common teleostean fishes.<br> Larva of each species is about 1mm long just after hatching, and 2- to 4-days-old larva is about 2mm long. Larva of each species has the following characters in common, i.e., spine-like patterns on dorsal and ventral fin folds, two layers of dorsal tissue, and longitudinal row of melanophores on the lateral boby. The melanophores on dorsal and ventral edges near the top of the tail are useful to distinguish the species of larvae.

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