摘要
本文对浙江北部沿岸海域经济鱼类幼鱼的分布类型、分布特点及其密度分布的逐月变化进行了分析,对经济鱼类幼鱼的数量变动进行了探讨。结果表明:①调查区内经济鱼类幼鱼的分布以碧霞、黄龙、鼠狼、葫芦、洋鞍一线,即20米等深线附近最密集,向西其密度逐渐递减,至10米等深线,除银鲳鳓鱼外,幼鱼数量显著减少;②在时序上6—8月份是经济鱼类幼鱼数量和种类出现最多的月份;③三十年代末期,经济鱼类幼鱼的数量顺序依次为小黄鱼、大黄鱼、带鱼、无针乌贼、银鲳、鳓鱼,八十年代张网渔获物中幼鱼的数量依次变为带鱼、大黄鱼、无针乌贼、银鲳、灰鲳、鳓鱼。最后提出了张网渔业管理的几点设想。
This paper studied the types and the characteristics of distribution and the monthIy fluctuation of distribution density of valued larvae in coastal water of Zhejiang.The result showed: (1) The most concentrated one of the investigated areas was along the line of Bi Xia, Wang Long, Shu Lang, Hu Lu and Yang An; i. e. along the twenty-metre isobath curve and its nearby areas. The distribution density steped down westwards. At the ten-metre isobath, the amount of valued larvae decreased notably except Stromateaides argenteas (Euphrosen) and Zlisha elongata (Bennett). (2) The largest amount and the most varied sorts of valued larvae occured from June to August. (3) In the late part of 1930s, the sequence of the amount of valued larvae war Pseudosciaena crocea, Pseudosciaena polyaetus Bleeker, Trichiurus haumela (Forskal), Sepeilla maindroni, and Stromateoides argenteus (Bennett); In 1980s, the order, according the catch by set gill net, is Trichiurus hanmelu (Forskal), Pseudosciaena crocea, Sepiella maindroni, Stromateoides argenteus (Euphrasen), and Ilisha elongata.In the last part the paper put forward some suggestions for the management of set-net fishery.
出处
《浙江海洋学院学报（自然科学版）》
CAS
1984年第2期121-129,4,共10页
Journal of Zhejiang Ocean University(Natural Science Edition)
