虫草蝠蛾生态学的研究Ⅲ.幼虫越冬与生理调节

STUDY ON ECOLOGY OF HEPIALIDAEⅢ.THE OVER WINTER LARVA AND ITS PHYSIOLOGICAL REGULATION

本文报道了云南虫草蝠蛾Hepialus sp.的幼虫越冬与生理调节。结果表明:(1)该虫以幼虫态越冬。冬季栖息土层深度在3~35厘米之间,密集越冬层是15~25厘米处;1~3龄虫离土表较浅,4~6龄虫较深。越冬层地温处于-0.5~-6.8℃;幼虫密集层的地温是-0.5~-2.5℃。(2)幼虫越冬初期体内脂肪、糖、蛋白质、无机盐类等含量增加,水份则降低;整个冬季,随着代谢的消耗,脂肪、蛋白质、糖含量逐步下降,水份继续减低。(3)翌年春天,当幼虫解除越冬时,体内水份猛增,而其它生化成分则继续下降。从而证明虫草蝠蛾幼虫越冬期间为适应严寒,进行了一系列的生理代谢调节。

In this paper,the overwinter larva,Hepialus sp.and its mechanism of the physiological regulation was reported.The results state clearly:(1).The insect survives through the winter in larva stase.The depth of the habitat in winter is between 5-35cm below the soil surface and most of the overwinter larva are found between 15-25cm below the surface.The larva in younger stages live less and those in older stages live more below the surface.The temperature of the soil is between-6.8;0.5℃and the temperature of the soil,where most of the larva are found,is between-2.5~0.5℃.(2).At early stage,the amount of fat,glucose,protein and mineral material in-creases sharply,and the water content dereoses in the body of the overwinter larva.In the winter,as metabolisom consumes,the content of fat,glucose and protein decrease gradually and the water content decreasing continues.In spring the water content in the larva body increases sharply and the content of the othe other biological substance is still decreasing.It shows that the larva have carried out a series of physiological metabolism to regulate the biochemical composition in their body in order to overwinter.