北海道南西沿岸のこんぶ生産量の春ニシン漁獲量と沿岸水温による重回帰分析

概要

論文の詳細を見る
Yields of Hosome-konbu (Laminaria religiosa) up to 3 × 10^3 t and catches of spring-spawning herring (Culpea pallasii) in excess of 2 × 10^5 t had been landed from Shiribeshi district along the southwest coast of Hokkaido during the former half of this century. However, there is no migration of herring and yields of Hosome-konbu are on the decrease less than 10^2 t at present. Long-term coastal sea temperatures at Suttu in Shiribeshi district indicate a difference in sea conditions in winter between the cold-former half of this century and the warm-later. Regression of yields of Hosome-konbu (Y: t) to the variables of catches of spring-hering l year earlier (H_<-1>: 10^3 t) and of favorable temperature indices (Ft) is given by Y=5.18H_<-1>+8.67Ft+579 (R^2=0.80, α=0.01, Fo=73.17 > F=5.39). This relationship indicates possible effects of spawned eggs and sperm by herring (0.80) and the environment (0.28) upon the decreases in yields and biomass of Hosome-konbu.
日本海洋学会の論文
1995-06-30