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本文在分析了1976—1985年浙江近海渔场盐度资料后得出:汛前至汛初(8—11月)高盐水体的消长趋势具有转弱、稳定、强化三种类型。渔汛期间(11—12月)高盐水体类型转换相对较少,但据年际势力强弱差异,又可定量划分为偏弱年、偏强年和常年三个等级。高盐水体强弱在一定程度上能起阻碍鱼群南移的作用,两者关系表现为:1.偏弱年,带鱼汛转旺期提前,中心渔场偏南,汛期进展快。2.偏强年,带鱼汛转旺期推迟,中心渔场偏北,汛期进展缓慢。3.常年,带鱼汛转旺期、中心渔场及汛期进展亦近常年。
Based on the analysis of the salinity data of offshore fishery in Zhejiang in 1976-1985, this paper draws the conclusion that the trend of the growth and decline of high-salinity water bodies is weaker, stable and intensified before the flood season and from the beginning of the flood season (August-November). During the fishing season (November-December), the conversion of high-salt water bodies is relatively small, but they can be quantitatively divided into three categories: weak year, strong year and perennial. To some extent, the strength of high-salinity water bodies can hinder the migration of fish stocks. The relationship between the two is as follows: (1) In the weaker years, the frequency of flood season is earlier, the center fishery is slightly southward and the flood season progresses rapidly. 2. In the stronger year, the delay of flood season of the octopus was postponed, the central fishery was northward and the flood season progressed slowly. 3. Perennial, fishy flood season, the center of fisheries and flood season progress is also near normal.