饶阳地区三种农田啮齿类头骨形态比较及性二型

关于动物头骨形态方面的研究报道曾受到了较多的关注（Cesani et al., 2003）.头骨形态是动物形态特征的一个重要方面,受遗传和环境因素的共同影响,存在着种间、性别和地理差异（张焱等,1999）.头骨的形态特征不仅是动物生理上的一个基本解剖指标,同时也是动物分类（李晓晨和王廷正,1992）和年龄鉴定（张洁,1989）的重要依据,是动物生态研究的重要指标.对头骨形态的研究,不仅对动物的种间、种内关系（Yom et al.,1999）和生态特征（Barlow et al.,1997）等方面的研究具有重要的参考价值,在动物的地理演化、发育生物学以及进化生态学的研究中也具有十分重要的意义.

Sexual dimorphism and comparisons of skull morphology among three rodent species in Raoyang county,Hebei Province, China

To investigate differences of size and shape of skulls among rodent species and between male and female,we radiographed specimens and measured parameters of skulls of three species (Tscherskia triton,Cricetulus barabensis and Apodemus agrarius) collected from the Raoyang country,Hebei Province,China. The data was analyzed with MANOVA in general linear models by SPSS 13.0 for windows. The results showed that: The three rodent species were significantly different in SL, SW,GBS, FL, RBCL, RSL, RSW and RFL, SL, SW and GBS of Cricetulus barabensis were smaller than other two species. Tscherskia triton had dumpy skull according as the ratio of skull length and skull width was smallest among the three species. Male and female were different in SL, SW,R SW and RFL. Males were larger than female in many parameters of skull relative size. Species and sex factors had interaction effect on SL,GBS, GBS/ SW and BCL/ SW. The observed differences of skull size and shape among the three species and between genders can be used to distinguish the species and gender.