以1～6月龄三疣梭子蟹“中宁1号”为材料，采用Logistic、Gompertz和von Bertalanffy 3种模型分别拟合了体质量、体长、全甲宽、甲宽、体高、大螯长节长、大螯不动指长及第一步足长节长共8个形态性状的生长特征，旨在寻找各性状的最佳生长模型，并对其增长规律进行研究。结果表明：三疣梭子蟹体质量性状生长过程以Logistic生长模型（R²=0.999）的拟合效果最佳；除体质量外的其它7个性状则均以von Bertalanffy生长模型（R²为0.990～0.994）拟合效果最好；各性状模型经ANOVA检验后均具有统计学意义（P<0.01）。根据各性状的最佳生长模型得出各性状的极限值分别为体质量231.44 g、体长84.45 mm、全甲宽164.44 mm、甲宽128.47 mm、体高43.69 mm、大螯长节长59.96 mm、大螯不动指长90.89 mm、第一步足长节长37.20 mm。体质量的快速生长区间及拐点分别为2.14～3.91月龄及3.02月龄；其它7个性状快速生长区间的始速点为0月龄，终速点为2.05～2.35月龄，拐点在1月龄左右。各性状间的生长速率、生长加速率、相对增长率与绝对增长率存在一定差异。总之，体质量性状生长过程符合“慢-快-慢”的特征，其它性状则表现为“快-慢”的特征。以上结果可为三疣梭子蟹“中宁1号”选择育种及养殖生产提供参考依据。

Three growth models,Logistic,Gompertz and von Bertalanffy,were used as the candidates for fitting the growth model of eight morphometric traits of Portunus trituberculatus "Zhongning No.1" at six months,including body weight,body length,full carapace width,carapace width,body height,meropodit length of the claw,fixed finger length of claw and meropodit length of the first peraeopod.The paper aimed to establish the optimum growth equation of morphometric traits and study the growth regulation of it.Growth parameters embraced in foregoing models were estimated by Levenberg-Marquardt iteration method.Results showed that Logistic model is the best model to describe the growth of body weight of P.trituberculatus,with squared multiple correlation coefficient R² reaching 0.999.However,the other morphometric traits were best confirmed by von Bertalanffy model,and the squared multiple correlation coefficient R² ranged from 0.990 to 0.994.All optimum growth models of varying morphometric traits was significant(ANOVA,P<0.01).The growth limits computed by optimum growth models were,body weight 231.44 g,body length 84.45 mm,full carapace width 164.44 mm,carapace width 128.47 mm,body height 43.69 mm,and meropodit length of the claw 59.96 mm,fixed finger length of claw 90.89 mm,meropodit length of the first peraeopod 37.20 mm.What's more,the fast growth intervals and growth inflection points of varying morphometric traits were:body weight 2.14-3.91 months and 3.02 months,body length 0-2.05 months and 0.87 months,full carapace width 0-2.14 months and 0.93 months,carapace width 0-2.07 months and 0.94 months,body height 0-2.14 months and 1.04 months,meropodit length of the claw 0-2.3 months and 1.09 months,fixed finger length of claw 0-2.35 months and 1.11 months,and meropodit length of the first peraeopod 0-2.12 months and 0.98 months.The growth rate,the growth acceleration,the relative growth rate and the absolute growth rate were different among varying morphometric traits.In short,the process of body weight trait growth conformed to the characteristic of "slow-fast-slow",the other morphometric traits are "fast-slow".The above results can provide some references for the selective breeding and production of P.trituberculatus "Zhongning No.1".

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国家“八六三”高技术研究发展计划（2012AA10A409）；国家自然科学基金项目（41106123，41376150）；浙江省水产育种专项（2012C12907-3）；浙江省海水养殖重点科技创新团队项目（2010R50025-08）；浙江省教育厅高校科研计划项目（Z201121258）；宁波市海洋蟹类产业科技创新团队项目（2011B81003）