Journal article

Male copulation behaviour and the risk of sperm competition

MA Elgar, FEC De Crespigny, S Ramamurthy

ANIMAL BEHAVIOUR | ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD | Published : 2003

Abstract

When females mate with more than one male during their reproductive cycle, males may increase their share of paternity by copulating repeatedly with the same female. Accordingly, males should mate repeatedly with the same female more frequently when the risk of sperm competition is greater. We examined this idea experimentally in the orb-web spider Nephila edulis, which is characterized by both extreme sexual size dimorphism and extreme male size variation. Comparison of the mating behaviour of solitary and pairs of males on the webs of virgin and mated females revealed that males adjust the frequency and duration of copulation according to the mating history of the female and the presence o..

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University of Melbourne Researchers