Abstract: The length-weight formula，growth equation，growth parameters，and changes in growth characteristics were studied by Von Bertalanffy growth equation in fat greenling Hexagrammos otakii in the deepwater artificial reef area of Zhangzi Island and fishery stock of fat greenling in that waters was estimated by FISATⅡ to understand growth characteristics and resources variation of fatgreenling in the surveyed area.The effects of artificial reef construction on fat greenling growth characteristics and resources were discussed，and suggestions on the fishery resourcesmanagementmeasures were put forward for sustainable development and resource reasonable utilization of the fat greenling fishery.The results showed thatmean body length and body weight including dominant body length and body weightwere tend to be increased annually，with dominantbody length of161-200mm and dominantbody weight of 81-120 g.The inflexion of body weight growth was observed at age of 3.75 years，and the critical biomass of fat greenling was found at age of 3.73 years，with the total instantaneous population mortality of 0.483 a year.The overall population biomass of fat greening standswas estimated to be 1571.6 ton（about196.4 g/m2）in artificial reef areas（800 hm2）by the Length based Cohort Analysis supported by FISATⅡ.The findings indicate that rational catchable age of the fatgreenling should be over3.73 years old，at least over3 years old and theminimum catchable size 281.6 mm in body length，and 273.7 g in body weight，the fat greenling less than these sizes being protected.
2016, Vol. 31 
