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Zoological Research
Kunming Institute of Zoology, Chinese Academy of Sciences
ISSN: 2095-8137
Vol. 27, No. 3, 2006, pp. 255-260
Bioline Code: zr06036
Full paper language: Chinese
Document type: Research Article
Document available free of charge

Zoological Research, Vol. 27, No. 3, 2006, pp. 255-260

 en Inter-population Differences in Reproductive Life-history Traits of Blue-tailed Skinks ( Eumeces elegans check for this species in other resources )from Hangzhou and Ningde, Eastern China
ZHANG Yong-pu, DU Wei-guo, SHOU Lu

Abstract

We measured body size and reproductive traits of blue-tailed skinks ( Eumeces elegans check for this species in other resources ) from two localities at different latitudes in Eastern China to reveal their inter-population differences in reproductive life-history strategies sp. Females from Ningde, the locality at a lower latitude, produced their eggs from 27th May to 22nd June; whereas females from Hangzhou, the locality at a higher latitude, produced eggs from 4th June to 12th July. Snout-vent lengths of the minimum reproductive female and adult skinks in Ningde population were smaller than that in Hangzhou population. Females from the two populations did not show significant difference in relative clutch mass. After the effect of maternal snout-vent length was statistically removed, clutch size and clutch mass did not differ between the two populations, but mean egg mass still showed considerable inter-population difference, with larger eggs in Hangzhou skinks. This study revealed negative correlation between clutch size and egg mass, and inter-population difference in trade-offs between clutch size and egg size. For a given clutch size, females from Hangzhou laid larger eggs than did those from Ningde. Therefore, in E. elegans, reproductive life histories differ significantly between the two populations, and maternal body size accounts for a large quantity of such inter-population differences. These results suggest that the reproductive strategies for this species change from a high-latitudinal population to a low-latitudinal population.

Keywords
Eumeces elegans; Ningde population; Hangzhou population; Body size; Egg size; Relative clutch mass; Inter-population difference

 
© Copyright 2006 Kunming Institute of Zoology, the Chinese Academy of Sciences
Alternative site location: http://www.zoores.ac.cn/

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