实验条件下1龄锦绣龙虾的生长特性

通过对不同生长时期锦绣龙虾(Panulirus ornatus)月生长指标的测定,建立了1龄锦绣龙虾的生长模型。锦绣龙虾的体长(L)—体质量(W)的相关式为:W=0.034 8L3.066 3;体长(L)和头胸甲长(CL)的相关式:L=2.772 2CL+0.337 9,得出锦绣龙虾的体长生长方程:Lt=37.498×(1-e-0.076 77(t-0.055 84)),体质量生长方程:Wt=2 333.24×(1-e-0.076 7 7(t-0.055 84))3.066 3,体长生长速度方程为:dL/dt=2.879 8×e-0.076 77(t-0.055 84),体质量生长速度方程为:dW/dt=549.244 3×e-0.076 77(t-0.055 84)(1-e-0.076 77(t-0.055 84))2.066 3。计算出其拐点年龄(Tr=ln3/k+t0)为14.65个月。说明锦绣龙虾体长在前期生长较快,而后期生长缓慢;体质量前期生长较慢,后期较快;体质量增长速度曲线呈不对称的S曲线,并具拐点,在拐点处其体质量增长速度能达到最大值79.24 g/月。本研究旨在为锦绣龙虾的合理开发利用提供科学参考。

Growth model for one-year old Panulirus ornatus

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.