干旱区生态环境知识资源中心(Arid): 荒漠沙蜥食物的两性差异

Arid

	荒漠沙蜥食物的两性差异
其他题名	Sexual Variation of Phrynocephalus przewalskii (Lacertilia:Agamidae)
	施丽敏; 赵伟; 李佳琦; 王莹; 丁未; 房峰杰; 刘迺发
来源期刊	四川动物
ISSN	1000-7083
出版年	2013
卷号	32 期号:1 页码:68-72
中文摘要	对2008年4~6月在甘肃省甘塘、阿拉善左旗、民勤、山丹采集的荒漠沙蜥样本进行了食物两性差异的研究。主要采用剖胃法对219个荒漠沙蜥胃样的6021个食物做了识别和鉴定。结果表明,荒漠沙蜥的食性为动物性,食物多为昆虫,主要取食半翅目和膜翅目昆虫,尤其是长蝽科和蚁科(合计高于70%),取食猎物的体积大小集中在0.01~20mm3。4个种群的沙蜥对长蝽科昆虫均表现为正向选择,部分种群对蚁科昆虫表现负向选择。可能是因为沙蜥有食物选择性,对长蝽科昆虫取食较多,对拟步甲科摄食较少。较多地取食蚂蚁则是因为生境中喜好食物较少,而蚁科昆虫数量多,遇见率也较高。荒漠沙蜥雌雄个体食物生态位重叠度极高,但是卡方检验的结果却表明两性在食物组成和食物大小存在显著差异。由于雌雄个体对同种食物有相同的选择性,因此导致两性在食物组成和食物大小上存在显著差异的原因可能是雄性家域范围更大,对食物有更多选择。
英文摘要	Sexual variation of diet was studied with the preserved specimens in Gantang,Alax Zuoqi,Minqin,Shandan from April to June,2008. Prey observations from stomach dissection were applied. 219 stomach contents with a total of 6021 prey items were handled and measured. Our result indicated diet preference to insects is a characteristic of Phrynocephalus przewalskii,and the species mainly preyed on Hymenoptera and Hemiptera,especially Lygaeidae and Formicidae ( > 70%) with the size of 0. 01 ~ 20 mm3. The four species of desert lizards tended to prey on Lygaeidae positively,meanwhile, part of the population showed negative selection toward formicidae. Maybe the lizard prefer certain food rather than others,for instance,it tended to eat large numbers of Lygaeidae,with Tenebrionidae taken in lesser numbers. P. przewalskii preyed on more ants as a result of less preferred food in the habitat,and it was easy to meet ants. The niche overlap of the male and female was extremely high,but the chi-square test results suggested the male and female with significant differences in food composition and food size. Males and females showed the same food preference,and therefore the male and female presented significant difference toward food because that male is with larger home range and more choice.
中文关键词	荒漠沙蜥 ; 食物 ; 两性差异
英文关键词	Phrynocephalus przewalskii prey sexual variation
语种	中文
国家	中国
收录类别	CSCD
WOS类目	ZOOLOGY
WOS研究方向	Zoology
CSCD记录号	CSCD:4764727
来源机构	兰州大学
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/230223
作者单位	兰州大学生命科学学院, 兰州, 甘肃 730000, 中国
推荐引用方式 GB/T 7714	施丽敏,赵伟,李佳琦,等. 荒漠沙蜥食物的两性差异[J]. 兰州大学,2013,32(1):68-72.
APA	施丽敏.,赵伟.,李佳琦.,王莹.,丁未.,...&刘迺发.(2013).荒漠沙蜥食物的两性差异.四川动物,32(1),68-72.
MLA	施丽敏,et al."荒漠沙蜥食物的两性差异".四川动物 32.1(2013):68-72.