抄録
Size distribution in body length of 7, 376 juvenile nibbler, Girella punctata Gray captured in the period from March to August, 1981, 1988, 1996 and 1997 at coastal waters of Izu Peninsula was analyzed for a better understanding of their population dynamics. In March and April, the fish captured at rocky beaches was significantly larger than those at breaking zone and tide pools. However, during the period from March to August, the smaller fish also joined the rocky beach population and those ranging from 1 to 2 cm were always found at breaking zone and tide pools. These results strongly suggest that the juvenile nibbler change their inhabitation from breaking zone and tide pool to rocky beaches as they grow up.
