ニュージーランド周辺海域におけるホキの耳石輪紋の形成期および成長曲線

概要

論文の詳細を見る
As there only otolith samples for six month period, the time of the ring formation was estimated by comparing the back-calculated length with the growth curve for younger age groups obtained from fhe movement of the mode of fhe length composition. The rings were estimated to be formed from February to May, one ring in a year. The largest number of rings counted was 12. VON BERTALANFFYs growth curve was fitted to the back-calculated total length. Almost no appreciable difference was observed between sexes, but some differemce was shown between regions. Growth equation in cm and year for each region is EAST region Lt=124[1-e-0.124(t+0.30)] Lt=132[1-e-0.122(t+0.39)] Lt=133[1331-e-0.121(t+0.21)] East region showed the smaillest growty among three. These growth curves were compared with those of other authors and some discussions were presented.
公益社団法人日本水産学会の論文