Abstract:
In the present study,the data of
Megalobrama terminalis from Qiantang River were analyzed by the FiSAT Ⅱsoftware,and the growth and mortality parameters as well as the exploitation status of
M.terminalis were obtained based on analysis of yield per recruitment(YPR)models.The results showed that the relationship between body length and body mass was expressed as
W=0.014 2×
L3.130 3(
R2=0.979 3,
P<0.001),the Von Bertalanffy growth equation was selected as an optimal growth criteria and was expressed as
Lt =57.6×1-e
-0.18×(t+1.31),and the growth inflexion point was 5.03 a.The total mortality rate(
Z),natural mortality(
M),fishing mortality rate(
F)and the current exploitation(
E)of
M.terminalis were 1.04,0.43,0.61 and 0.59 by ELEFAN Ⅰ method,respectively.Moreover,the Beverton-Holt dynamic model was developed to predict the opening catch size of
M.terminalis as 23.98 cm.The results of this study showed that the resources of
M.terminalis in Qiantang River were utilized greatly and faced certain fishing pressure.