Male reproductive success in two midwife toads, Alytes obstetricans and A. cisternasii

Marquez, R.

Behavioral Ecology and Sociobiology 324: 283-291

1993


ISSN/ISBN: 0340-5443
DOI: 10.1007/bf00166518
Accession: 021312893

Download citation:  
Text
  |  
BibTeX
  |  
RIS

Article/Abstract emailed within 0-6 h
Payments are secure & encrypted
Powered by Stripe
Powered by PayPal

Abstract
One population of the midwife toad species Alytes obstetricans and one of A. cisternasii were studied in Spain for two consecutive reproductive seasons. Males that were most successful at hatching a high proportion of their clutch did not obtain more matings. On the other hand, in both species larger body size conferred a significant reproductive advantage on males. These results are explained mainly by the increased number of mates obtained by larger males, probably as a result of female choice. The selection gradients for body size in males (regressions of reproductive success on body size were not significantly different within species between years nor between species within the same period of time. Hatching success (proportion of the eggs hatched) was not correlated with male body size in A. obstetricans. Hatching succession A. cisternasii was weakly negatively correlated with male body size in 1988.

Male reproductive success in two midwife toads, Alytes obstetricans and A. cisternasii