年渔获量

东海区带鱼年渔获量变动规律的探讨

Catch change pattern of hairtail in the East China Sea

中上层鱼类实际年渔获量至今尚未超过其最大可持续开发量。

But , the pelagic fish catches were not attained the MSY in recent years .

并用灰色马尔柯夫预测模型，预测山东省黄姑鱼的年渔获量。

The forecasted results of the model are more arecise than those of other models in predicting fishery output .

年渔获量波动于10000～100000吨之间，主要渔汛期1月份渔获量可占全年渔获量的40%以上。

The annual catch of squid ranges from 10,000 to 100,000 tons . The main fishing season is January , that the cath accounts for 40 % in a year .

1997年实际渔获量和捕捞力量均超过了估算的最大持续产量和最大持续捕捞力量。

At present , the actual fishing effort and the fish yield have exceeded the maximum sustainable yield and the optimum fishing effort .

根据太湖1973-2002年连续30年的鱼类渔获量统计资料，研究了太湖银鱼和主要鱼类渔获量间的相关关系。

Based on the statistic data of fish catches from 1973 to 2002 in Lake Taihu , the correlation between catches of ice fishes and main fishes was analyzed .

运用1951~1984年的回归模型对1985和1986年的渔获量作出了预测，其预测值与实际渔获量的相对误差均小于5%，验证了其可靠性。

Regression model of catches between 1951 and 1984 was used to predict catch in 1985 and 1986 with less than 5 % relative error .