Movement and Growth of Tagged Juvenile Nibblers at the Coastal Waters.

概要

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Tagging experiment were carried out for a better understanding of the movement and growth of juvenile nibbler <I>Girella punctata</I> Gray at the Tanoura inlet and it's surrounding waters, Shimoda, Shizuoka Prefecture. A total of 6, 834 juvenile nibblers caught were tagged by binary coded wire tag and released in the period from March to September in 1996 and 1997. Of them, 78 and 51 fishes were recaptured and could discriminate each individual in 1996 and 1997, respectively. The majority of fishes were recaptured near the released point, except for point TC, over two years. This fact suggested that the juvenile fishes of less than 3 cm in body length could not move from the releasing point to the captured point, TC by traversing the inlet. A juvenile, which had been caught at P1, 650 m away from the released point, was recaptured again at the same point 5 days after the release. This indicated that the juvenile fish moves at the rate of 130 m/day. Moreover, other juvenile grew from 2.0 cm to 9.3 cm for 300 days. The regression equations between lapsed days (t) and body length (L) or body weight (W) can be expressed as Lt =19.227 {1-exp (-0.0018t-0.1036) } in body length, and Wt=0.0233 t<SUP> 1.123</SUP> in body weight.
日本水産増殖学会の論文