南极磷虾的生长与复眼晶椎数目关系的研究

STUDY ON THE RELATIONSHIP BETWEEN THE CRYSTALLINE CONE NUMBER AND THE GROWTH OF THE ANTARCTIC KRILL

本文从自然种群现场取样和实验室内活体培养两个方面对南极磷虾复眼中的晶椎数目与磷虾体长之间的关系、在负生长状态下磷虾复眼中的晶椎数目的变化等进行了研究。实验结果表明：在正常情况下（磷虾身体不出现负生长），磷虾复眼中晶椎数目与体长之间存在指数函数关系。雌性磷虾的晶椎数目（ＮＯＣＣ）与体长（ＢＬ）之间的关系为ＮＯＣＣ＝４６３．６２ｅ０．０４８４ＢＬ（ｒ＝０．９６４２，ｎ＝２７３）。从活体培养的结果来看，当南极磷虾身体出现负生长时，磷虾复眼中的晶椎数目保持不变，即晶椎数目不受负生长的影响。晶椎数目与体长之间的比率可作为研究在自然环境中南极磷虾是否存在负生长的一种检测手段。

Correlation between the body length and the number of the crystalline cone in the compound eye of the Antarctic krill Euphausia superba Dana was examined.From the samples collected in the late summer, it shows that there is an apparent exponential relationship between crystalline cone and the body length.From the laboratory population, it seems that when the krill shrink, the crystalline cone number does not decrease.The ratio of crystalline cone number to body length offers a method for detecting the effect of shrinking in natural populations of krill.