スルメイカの発生

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タイトル別名
  • スルメイカ ノ ハッセイ
  • Development of the Squid, Ommastrephes sloani pacificus (STEENSTRUP)

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The author observed the development of squid (Ommastrephes sloani pacificus (STEENSTRUP)) eggs artificially fertilized by means of spermatozoa in the seminal receptacles of the female's buccal membrane and eggs in the oviduct of the ripe one (M.L. 256mm.) obtained in the_Arikawa Bay, Goto Is. on March 1960. The samples were placed in beakers kept in running water (W.T. 9.8°-13.2°C, Cl. 18.19‰) in the aquarium, of our Faculty. The results obtained are as follows: The cleavage is partial, discoidal type. The gastrulation is done by epiboly. Mantle, eyes, gills, funnel and arms develope in turn. The hatching out takes place after about 10 days. The newly hatched larva is 1.2mm. in dorsal length and has large yolk-sac in mantle and chromatophore on mantle and eyes, not being able to swim.

長崎大学水産学部研究報告, v.9, pp.43-47; 1960

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