Foraging Ability in the Scorpionfly Panorpa vulgaris: Individual Differences and Heritability

According to indicator models of sexual selection, mates may obtain indirect, i.e. genetic, benefits from choosing partners indicating high overall genetic quality by honest signals. In the scorpionfly Panorpa vulgaris, both sexes show mating preferences on the basis of the condition of the potentia...

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Veröffentlicht in:Behavioral ecology and sociobiology 2007-01, Vol.61 (3), p.487-492
Hauptverfasser: Missoweit, M., Engels, S., Sauer, K. P.
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container_title Behavioral ecology and sociobiology
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Engels, S.
Sauer, K. P.
description According to indicator models of sexual selection, mates may obtain indirect, i.e. genetic, benefits from choosing partners indicating high overall genetic quality by honest signals. In the scorpionfly Panorpa vulgaris, both sexes show mating preferences on the basis of the condition of the potential partners. Females prefer males that produce nuptial gifts (i.e. salivary secretions) during copulation, while males invest more nuptial gifts in females of high nutritional status. Both characters, males' ability to produce nuptial gifts and high nutritional status of females, are known to be reliable indicators of foraging ability. Thus, besides possible direct benefits, both sexes might also obtain indirect benefits in terms of "good foraging genes" by their choice and thereby increase the fitness of their offspring. A prerequisite for this possibility is the heritability of the respective trait. In the present study, we estimated the repeatability and the heritability of foraging ability. Our results indicate (1) a significant repeatability of individual foraging efficiencies in males and females and (2) a heritable component of this trait by a significant parent-offspring regression. These findings suggest that genetic benefits in terms of increased offspring foraging ability might contribute to selection for mating preferences in both sexes.
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subjects Animal reproduction
Evolutionary genetics
Female animals
Foraging
Heritability
Male animals
Mating behavior
Nutritional status
Offspring
Panorpa vulgaris
Parents
Reproductive success
Sexual selection
title Foraging Ability in the Scorpionfly Panorpa vulgaris: Individual Differences and Heritability
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