Growth model for one-year old Panulirus ornatus

Abstract

We developed a growth model for Panulirus ornatus by measuring the length of individuals during dif-ferent growth periods during rearing in the laboratory.Growth was explained by the following equation: W= 0.035 8× L3.043 2.The body immortal length was explained by the equation Lt=56.0×[1-e-0.053 1(t-1.1944)].The relationship between body length and carapace length was L=2.772 2CL + 0.337 9.The body weight growth equation was Wt= 7 481.2×[1-e-0.0531(t-1.1944)]3.The rate of change in body immortal length was explained by Dl/Dt=56.0×0.0531× е-0.0531(t-1.1944).The rate of change in body weight was explained by dW/dt=3×7 481.2×0.053 1×е-0.053 1(t-1.1944)× [1-е-0.053 1(t-1.1944)]2.The inflection point age of P.ornatus was 14.56 months,calculated using the formula Tr = ln3/K+t0.Body length increased more rapidly during the early period.Conversely,body weight increased more rapidly in the later period.The body weight growth curve was represented by an asymmetrical S curve,but had an inflection point.The body weight increased up to a maximum of 79.24 g-month-1 at the inflection point.