脊尾白虾与东方白虾形态特征鉴别

Morphological Characteristic Identification between Exopalaemon carinicauda and Exopalaemon orientis

[目的]研究脊尾白虾(Exopalaemon carinicauda)和东方白虾(Exopalaemon ovientis)的体尺性状和形态特征。[方法]采用形态度量和统计学t测验方法。[结果]就抱卵期个体大小而言,脊尾白虾明显大于东方白虾;在形态特征上,2种白虾的差异也较大。t测验显示,脊尾白虾和东方白虾在头胸甲宽/体长、腹部宽/体长、头胸甲宽/头胸甲长等指标上有极显著差异,其中在指节长/腕节长上,2种虾的平均值分别为0.5365和0.8687,在所有的形态指标中差异最显著(t值为9.12)。[结论]对脊尾白虾的健康养殖,应改变过去通过自然海区纳潮获得亲虾的方式,在养殖的各个阶段也应做好东方白虾发生情况的监控。

[Objective]The research aimed to study body-size traits and morphological characteristic of Exopalaemon carinicauda and Exopalaemon orientis.[Method]The method of morphological measure and statistical t-test were used.[Result]The results showed that on the body-size of egg-carrying shrimp,the individual value of E.carinicauda was bigger than that of Exopalaemon orientis.For the morphological characteristic,t-test showed there was significant variances between Exopalaemon carinicauda and Exopalaemon orientis on the indices of carapace width/body length,abdomen width/body length,carapace width/carapace length and so on.Thereinto,the average values of dactylus length/carpus length of the two shrimps were respectively 0.5365 and 0.8687,which was the most significant among all the morphological indices.[Conclusion]The healthy cultivation of Exopalaemon carinicauda should change the way of obtaining the parent shrimp by tidal prism in natural sea area,and also should monitor the occurrence status of Exopalaemon orientis during all cultivation stages.