三疣梭子蟹渔业生物学的初步调查

为探讨池塘养殖三疣梭子蟹的生长规律和雌雄差异，本研究对1~6月龄池塘养殖三疣梭子蟹各生长指标进行了比较分析，并采用Logistic模型分别拟合三疣梭子蟹的体重 (BW)、体长 (BL)、体高 (BH)、全甲宽 (FCW)、甲宽 (CW)、大螯长节长 (MLC)、大螯不动指长 (FFLC)、第一步足长节长 (MLFP)等8个形态性状的生长特征。结果显示，三疣梭子蟹雌性和雄性的生长存在差异，早期雄性生长较快，后期雌性生长较快，而雌雄混合分析介于二者之间。三疣梭子蟹各生长性状的Logistic模型拟合结果显示，除雌性MLC和MLFP以及雌雄混合分析的MLFP之外，其余性状R²均达到0.990以上；雌性和雄性体质量的极限生长值分别为290.27和195.91 g，快速生长区间分别为2.74~5.10月龄和2.33~4.14月龄，拐点分别为3.92和3.24月龄。研究表明，三疣梭子蟹的生长过程均符合“慢-快-慢”的特征，雄性比雌性更早进入快速生长期，但是快速生长期的持续时间不及雌性。本研究对三疣梭子蟹不同生长指标的规律特征，以及各指标在混合养殖条件下雌性和雄性的优势阶段进行了研究，为实现三疣梭子蟹精细化高效养殖提供了参考。

The preliminary investigation of Portunus trituberculatus in fisheries biology

In order to explore the growth characteristics and sexual differences of Portunus trituberculatus cultured in ponds, this study investigated the growth parameters of pond cultured P. trituberculatus at 1 to 6 months of age, and Logistic model was used to fit eight morphometric traits of P. trituberculatus, including body weight (BW), body length (BL), body height (BH), full carapace width (FCW), carapace width (CW), meropodit length of the claw (MLC), fixed finger length of claw (FFLC) and meropodit length of the first peraeopod (MLFP). The results showed that the growth was different between male and female of P. trituberculatus. The male grew faster at the early stage, while the female grew faster at the late stage of culture, and the mixed sex analysis lied in between. The R² values of all models of the morphometric traits were above 0.990 except MLC and MLFP in female and MLFP in mixed sex. The carrying capacity of BW of female and male were 290.27 g and 195.91 g, respectively, the fast growth interval of female and male were 2.74-5.10 months of age and 2.33-4.14 months of age, respectively, and the inflection points of female and male were 3.92 months of age and 3.24 months of age, respectively. In summary, the growth process of P. trituberculatus conformed to the