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. Reproductive and feeding biology of the pitviper Rhinocerophis alternatus from subtropical Brazil

1099 downloads

Open Access

pp. 31-39
Authors: Nunes, Simone de Fátima; Kaefer, Igor Luis; Leite, Pedro Terra & Cechin, Sonia Zanini

Abstract: Dissection of preserved specimens of Rhinocerophis (previously Bothrops) alternatus, combined with data on captive individuals, provided information on the reproductive biology, sexual dimorphism and feeding habits of this viperid snake, forming the first comprehensive study on the natural history of this species in subtropical Brazil. Females were longer than males in snout–vent length (SVL), averaging 992 mm. Males averaged 664 mm in SVL and had relatively longer tails. Mating was observed in July under conditions of captivity. Mature males were found throughout the year, as were females with enlarged follicles. Nevertheless spermatogenesis, inferred by an increase in testicular volume, occurred during the early mating period and its preceding months. Oviductal embryos were recorded only from November to January and parturition occurred from February to August, characteristics of a seasonal reproductive cycle, a recurrent pattern for snakes from the subtropical domain. We observed asynchrony in the timing of mating and parturition, indicating long-term sperm storage after mating by females. In addition, our observations of muscular contraction and the presence of spermatozoids in the posterior portion of the uterus of mature females allowed us to suggest utero-muscular twisting as a possible mechanism used by R. alternatus for controlling the timing of its reproductive cycle. The number of newborns per litter varied from five to 20 (mean = 12). Feeding frequency was 29.7%, and the analysis of gut contents indicated a highly specialized diet, which is restricted to rodents (Muridae and Caviidae) and marsupials (Didelphidae). Most of the prey was ingested head-first.

Keywords: VIPERIDAE, BOTHROPS, DIET, REPRODUCTION, MORPHOLOGY, SERPENTES

Download Access:

The latest 8 issues can be downloaded when logged in with a Herpetological Journal subscription membership.

Individual articles can be purchased for download.

Older issues and occasional Open Access articles are available for public download

Submissions:

For further information and submission guidelines please see our Journal Instructions to Authors

pdfBHS Ethics Policy

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.