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无齿螳臂相手蟹是长江口潮间带和潮上带的优势种之一,具有重要的生态功能。为探求无齿螳臂相手蟹不同阶段的异速生长和成熟状况,于2009年10月至2010年9月期间采集样本,通过聚类和分段线性回归等分析方法对雌雄蟹头胸甲、螯、腹部等形态数据进行分析,建立区别不同生长阶段的判别函数并用逻辑斯蒂回归估计其50%形态成熟点。结果如下:雌雄蟹50%形态成熟点分别为头胸甲宽18.22mm和16.36mm。雄蟹的螯宽和雌蟹的腹宽均表现出明显的异速生长;根据相对生长率的不同,雄蟹异速生长可分为三个阶段,雌蟹分为2个阶段;不成熟的雄蟹异速生长拐点发生在壳宽11.78mm,不成熟和成熟雌蟹腹部在壳宽13.04～18.64mm范围内重叠。同时研究了50%的生理成熟大小,雌雄成熟大小分别为17.50mm,17.20mm。雄性形态成熟大小小于生理成熟大小,而雌性则相反。
The teethless mantis Crab is one of the dominant species in the intertidal zone and the tidal zone of the Yangtze Estuary, and has important ecological functions. In order to explore the allometric growth and maturation of different stages of toothless mantis Crab, the samples were collected from October 2009 to September 2010. The samples were collected by clustering and piecewise linear regression analysis, Chela, abdomen and other morphological data were analyzed to establish discriminant function of different growth stages and use Logistic Regression to estimate its 50% morphological maturity. The results are as follows: 50% of male and female crabs mature shape points were 18.22mm and 16.36mm wide chest. According to the relative growth rate of different, male allometric growth can be divided into three stages, the female crab is divided into two stages; immature The inflection point of allometric growth of male crabs occurred in shell width 11.78mm, and the immature and mature female crab belly overlapped in the shell width 13.04 ~ 18.64mm. At the same time studied the size of 50% of physiological maturity, male and female mature size was 17.50mm, 17.20mm. Mature male size less than the size of the physiological maturity, while the female is the opposite.