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1 May 2004 SEXUAL CONFLICT OVER MATING IN A SPIDER: INCREASED FECUNDITY DOES NOT COMPENSATE FOR THE COSTS OF POLYANDRY
Alexei A. Maklakov, Yael Lubin
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Abstract

Female multiple mating (polyandry) is a widespread but costly behavior that remains poorly understood. Polyandry may arise when whatever benefits females accrue from multiple mating outweigh the costs, or males manipulate females against the females' best interests. In a polyandrous spider Stegodyphus lineatus females may mate with up to five males, but behave aggressively toward additional males after the first mating. Female aggressiveness may act to select for better quality males. Alternatively, females may try to avoid superfluous matings. To test these alternatives, we allocated females into single-mating (SM) and double-mating treatments. Double-mated females either accepted (DM) or rejected (RE) the second male. DM females laid more eggs, but did not produce more offspring than SM and RE females. Offspring of DM females were smaller at dispersal than offspring of SM and RE females. Also, nest failure was significantly more common in DM females. Paternal variables did not influence female reproductive success, whereas maternal body condition explained much of the variation. We show that polyandry is costly for females despite the production of larger clutches and suggest that multiple mating results from male manipulation of female remating behavior.

Alexei A. Maklakov and Yael Lubin "SEXUAL CONFLICT OVER MATING IN A SPIDER: INCREASED FECUNDITY DOES NOT COMPENSATE FOR THE COSTS OF POLYANDRY," Evolution 58(5), 1135-1140, (1 May 2004). https://doi.org/10.1554/03-420
Received: 14 July 2003; Accepted: 17 December 2003; Published: 1 May 2004
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KEYWORDS
Antagonistic coevolution
Direct selection
multiple mating
sexual selection
Stegodyphus lineatus
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