Analysis of length-weight relationship formajor fishing species from Bohai Bay

We describes therelationships between length(fork length, carapace length, carapace width and carcass length) and weight for 22 species of fishing resources caught during 2008~2009 in Bohai Bay and conducted a regression analysis of power function. A total of 4 478 individuals belong to 8 order and 16 families. The value of the exponent b in the length-weight relationship ranged from 1.271to 3.316 and was mainly about 2.979.The t-test indicates that10 species of isometric growth pattern, 10 species werein negative algometry and 2 species were in positive allometry. The R2 of length-weight of all species except 4 were larger than 0.81. The present length-weight key for 22 species of fishing resourcesis avaluable tool for fishery managers.