The British Herpetological Society

The Herpetological Journal is the Society's prestigious quarterly scientific journal. Articles are listed in Biological Abstracts, Current Awareness in Biological Sciences,Current Contents, Science Citation Index, and Zoological Record.

The 2017/18  impact factor of The Herpetological Journal is 1.268

ISSN 0268-0130


pdf 07. Temporal and spatial variation in life history traits of the Japanese gecko, Gekko japonicus

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Open Access

pp. 305-311

Authors: Yong Pu Zhang, Jun Ping, Shuang Li Hao & Hua Bin Zhou

Abstract: Life-history variation has been widely reported for species with variable clutch size, but detailed data on reproductive strategies for species with invariant clutch sizes are scarce. We collected gravid female geckos (Gekko japonicus) from three geographically separate populations to examine geographic and annual variation in reproductive strategies. The majority of females produced a fixed number of eggs (n=2). Females from the southern population had larger body size, produced larger eggs, and had heavier clutches than females from two more northern populations, which was largely attributable to among population differences in maternal body size. Within populations, female body mass varied between years; heavier females laid larger eggs and heavier clutches. The among-year difference in maternal body mass partly accounted for the annual variation in egg size and clutch mass. These results suggest that species with invariant clutch size can adjust egg size to increase or decrease per-clutch reproductive output.

Key words:  Annual variation, clutch size, geographic variation, offspring size, reproductive strategy

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IMPORTANT NOTE - JUNE 2020

Please note that as from Volume 31 Number 1 (January 2021) on, the Herpetological Journal will be available as an online publication only - the last print edition will be Volume 30 Number 4.   

Aligning with this change, it is now no longer possible to purchase a subscription that includes a print copy of the HJ.  All members who have existing HJ print subscriptions that remain active as at end June 2020 will receive the full four 2020 print editions.  New subscribers or renewals after this time will only have option to subscribe to the online only subscription package.  Subscription pricing has been amended to reflect the content changes.