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.

 ISSN 0268-0130

2021 Impact Factor from Clarivate for the Herpetological Journal is 1.194, an increase of 0.332 from 2020.

pdf 02. The embryo and hatchling mortality of the green turtle (Chelonia mydas) and olive ridley (Lepidochelys olivacea) in relation to clutch size


Open Access


Authors: Suhashini Hewa Visenthi

Abstract: This study was carried out at the Kosgoda Victor Hasselblad Turtle hatchery in Sri Lanka, between December 1 988 and November 1989. A total of 64 nests of Chelonia mydas and 32 nests of Lepidochelys olivacea were examined after the emergence of hatchlings. The percentage late mortality (late embryonic stages and early hatchlings) of C. mydas and L. olivacea showed a positive relationship with the increasing number of eggs in a clutch. There was no significant relationship between the percentage early embryonic mortality and the clutch size. The percentage of live hatchlings of both species showed a negative relationship with the increasing clutch size. Dividing and transplanting C. mydas clutches with more than 120 eggs and L. olivacea clutches with more than 110 eggs may result in higher percentages of live hatchlings. Investigations on the incubation temperature of small egg clutches need to be made in order to find the effect on the sex ratio of hatchlings.

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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.