2,093 research outputs found
Western Oregon University/Takaoka National College Intensive English Program for 2003(<Special Report>Study Abroad Program)
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Development of the Squid, Ommastrephes sloani pacificus (STEENSTRUP)
Get PDFThe author observed the development of squid (Ommastrephes sloani pacificus (STEENSTRUP)) eggs artificially fertilized by means of spermatozoa in the seminal receptacles of the female\u27s 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
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