ツルウバウオの産卵

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In April 1963 and April 1964 the authors collected twelve adult fish of the clingfish, Aspasma ciconiae JORDAN et FOWLER, in the low tidal zone on the rocky shore of Meshima Island, Nagasaki Prefecture. The fish, ranging 50mm to 69mm in total length, consisted of three males and nine females, and most of them had mature gonads. The color of the living adult fish was light yellow brown with ten brown saddle bands, but the color swiftly changed into uniform pale brown when the fish was preserved in formalin. The egg-cluster of the fish was deposited in one layer mass on the flat underside of a stone lying in the low tidal zone. It covered 13.4×4 square centimeters of the underide and contained three egg-masses at different developmental stages. The egg was demarsal one with an adhesive flat provided with minute filament, and it was broadly elliptical shape, 1.7mm in long axis and 1.3mm in short axis. The incubation-period seemed to extend for twenty days at 14° to 17℃. The newly hatched larva was slender in form and 5.3mm in total length. It had 34 myomeres, a heavy yolk and distinct melanophores and xanthophores. The larva comsumed its york in four days after hatching, and it swam in a glass jar. Two mature males and five mature females of A. cioniae, collected in April 1963, were kept for sixteen days in an aquarium. They deposited two egg-clusters on the underside of a stone, set as an artificial nest, but the eggs of the clusters were entirely unfertilized.
社団法人日本動物学会の論文
1965-04-15

ツルウバウオの産卵

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