摘要
本文通过对重庆地区的主要江河中渔获物的随机取样,分类调查渔船123艘,以单船日捕捞量作为统计处理的基本数据,研究单船日捕捞种类、产量、不同月份、年捕捞量的变化;不同种类在渔获物中所占比例;不同河流的优势种类与1975年的调查资料作比较;从而了解重庆江河鱼类资源数量变动趋势。
The random sampling of the fishing products of principal river fish on 123 fishing boats has been taken. Here,daily catch per boat is used as the major data for statistical treatment,and then the paper reports about the kinds of fish in daily catch quantity changes,also monthly and anual catch changes, the percentage of each kind of fish in different rivers. And all these are compared with the data worked out in 1975. Then the tendency of quantity changes of resources river fish can be understood.
出处
《重庆师范学院学报（自然科学版）》
1993年第3期80-84,共5页
Journal of Chongqing Normal University(Natural Science Edition)
基金
重庆市科学技术委员会1989年下达的课题
关键词
日捕捞量
渔获物
鱼类资源
daily catch
superiority kind
fishing product
resource change
