タイ湾で漁獲されるアジアジンドウイカの成熟と外套長組成〔英文〕

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Samples of the Indian squid Loligo duvauceli, 5, 303 males and 6, 149 females, were collected by otter boad trawlers and light-luring fishing boats off the west coast of the Gulf of Thailand from 1986-1989.The speciments were classified into five stages of maturity for both sexes. The group maturity curves showed that sizes at 50% maturation approximated 17cm ML for males and 10cm ML for females. Two substantial recruitments of catchable stock were found in December-March and July-October, based on the appearance of larger sized squids rather than the 50% mature sizes.Assuming that the successive shift observed in the length frequency distributions are expressed by the von Bertalanffy growth equation and the time from birth to recruitment was 4 months, the growth parameters K were estimated at 0.083 month-1 for male squid and 0.095 month-1 for female squid.
日本水産學會の論文