浙江丽水中国石龙子的食性、两性异形和雌性繁殖

丽水分布的中国石龙子（Ｅｕｍｅｃｅｓ ｃｈｉｎｅｎｓｉｓ）摄入的食物均为无脊椎动物，分别属于环节、软体和节肢动物，涉及３０余科，成体和幼体的食物生态位宽度分别为７．２６和６．６９，成体的幼体的食物生态们重叠度为０．５９。性成熟雄性个体大于雌体。成雄和幼体的头长和头宽随体长ＳＶＬ的增长速率大于成雌，成雄头长随ＳＶＬ的增长速度显著大于幼体，成雌和幼体的头长随ＳＶＬ的增长速率无显著差异。成雄头部大于成雌

Food habits,sexual dimorphism and female reproduction of the skink ( Eumeces chinensis) from a Lishui population in Zhejiang

Eumeces chinensis from a Lishui population consumed a broad range of annelid, molluscan and arthropod invertebrates covering more than 30 families. Food niche breadth was 7.26 for adults and 6.69 for juveniles. Food niche overlap between adults and juveniles was 0.59. Males were the larger sex in E. chinensis. Head size(head length and head width)increased more rapidly with SVL in adult males and juveniles than in adult females. Adult males had larger heads than did adult females juveniles had large size(SVL) specific head length than did adult females. The smallest female that could lay eggs in our sample was 88.1 mm SVL, and all females surpassing this size produced a single clutch per breeding season. Egg laying occurred between 31 May and 28 June. Clutch size and clutch mass varied from 9 to 25 (mean=15 3) and from 5.20 to 18.98g (mean=10.49g), respectively. Relative clutch mass varied from 0.188 to 0.438 (mean=0.327).Clutch size and mass and egg size were positively correlated with female SVL. The increase of egg length was accommodated by an increase of egg width. Egg length, egg width and egg size were independent of clutch size. Females increased reproductive output through increasing clutch size(hence clutch mass)and egg size.