草原沙蜥(Phyrnocepha lus fronta lis)生殖策略的研究  

Study on the Reproductive Strategy of Lizard Phrynocephalus frontalis

作　　者：郭砺[1] 赵辰光[1] 

机构地区：[1]内蒙古大学生物学系,内蒙古呼和浩特010021

出　　处：《内蒙古大学学报（自然科学版）》2001年第2期214-216,共3页Journal of Inner Mongolia University：Natural Science Edition

摘　　要：草原沙蜥 ( Phrynocephalus frontalis)每年产卵一次 ,平均窝卵数为 3,平均生殖投入 (卵重 /体重 )为 0 .1 64,生殖投入与体长、体重、年龄不相关 ;窝卵数与生殖投入显著正相关 ,y=0 .0 2 5x+0 .0 95,r=0 .4 62 ,即生殖投入随窝卵数增加而增加 ;体重与窝卵数显著正相关 y=0 .35x+0 .86,r=0 .65;体长与窝卵数也显著正相关 ,y=0 .1 x-2 .4 5,r=0 .51 .根据繁殖期前后性比 (♀ / )的变化 ,推测部分雌蜥繁殖后死亡 ,说明生殖对雌性有一定的损害作用 .根据各项生态学特征的比较 ,草原沙蜥的繁殖策略属The lizard Phrynocephalus frontalis breeds once a year,the average clutch size is 3 and the average reproductive investment (clutch weight/body weight) is 0.164.The reproductive investment is not correlated with snout vent length ( SVL ),body weight and age.The clutch size is positively correlated with the reproductive investment, y=0.025x+0.095,r=0.462, that is to say,the reproductive investment increases with the increasing of the clutch size.The body weigh and the SVL are positively correlated with the clutch size respectively and the regression equations are y=0.35x+0.86,r=0.65 and y=0.1x-2.45,r=0.51 respectively. In comparison with the change of sex ratio (♀/) before and after breeding we may infer that reproduction must harm the females for some of the females die after breeding.Judging by a series of ecological characteristics we can affirm that the lizard Phrynocephalus frontalis is K strategy.

关 键 词：草原沙晰 繁殖策略 生殖投入 晰蜴 K选择 生长 体重 年龄 窝卵数 

分 类 号：Q959.603[生物学—动物学]