Multianalysis between Catches of Ice Fishes and Catches of Main Fishes in Lake Taihu
Based on the statistics of fish catches from 1973 to 2002 in Lake Taihu,with the methods of stepwise regression analysis and path analysis, the effects of catches of main fishes on the changes of catches of ice fishes in Lake Taihu had been studied. The results showed that: the optimization regression model was W=225.084 3+1.486 0W3+0.0877W7 (n=30,R=0.836 4, P<0.000 1),and the results of path analysis were: the catches of topmouth culter have the maximal effects on catches of ice fishes,and the catches of other fishes follow that. The path coefficient respectively was Py.3=0.890 8 ,P<0.000 1 and Py.7=0.388 7,P=0.000 6.
Lake TaihuIce fishesMain fishesCatchesMultianalysis