平衡石の日周輪解析をもとにした1996年の日本海におけるスルメイカの成長
Year: 1999
Type: article
Abstract: Growth of the Japanese common squid Todarodes pacificus caught in the Sea of Japan in 1996 was examined from statolith microstructure analysis. Specimens were taken by set nets in Wakasa Bay from March to May, and caught by squid jiggers set on research vessels and a commercial fishing vessel in the offshore region of the Sea of Japan from May to August. These specimens were measured dorsal mantle length and taken statoliths in order to estimate their ages. The range of dorsal mantle length of specimens caught in Wakasa Bay and the offshore region of the Sea of Japan were 3-15 cm and 17-26 cm respectively, and ages estimated at 90-190 days and 170-260 days. From the estimated number of days after hatching, 90% of specimens were found to have hatched during November and December, 1995. Therefore, we were able to consider that the specimens examined hatched in the same period. The relationship between mantle length and estimated number of days after hatching of the specimens was "S" shaped, so that the growth curves fitted a logistic equation. The growth curves were estimated for males and females separately as follow: Male; DML=253/(1+e(4.50-0.0262t)) Female; DML=268/(1+e(4.54-0.0257t)) Where DML is the dorsal mantle length (mm) and t is the number of days after hatching.
Language: Japanese
Domain: Life Sciences
SDG: Life below water
Open Access status: green
OpenAlex ID: W7146884157