Please use this identifier to cite or link to this item: http://hdl.handle.net/1893/7269

Appears in Collections:Biological and Environmental Sciences Journal Articles
Peer Review Status: Refereed
Title: The benefits of multiple mating to female seaweed flies, Coelopa frigida (Diptera: Coelpidae)
Authors: Dunn, Derek W
Sumner, J P
Goulson, Dave
Contact Email: dave.goulson@stir.ac.uk
Keywords: polyandry
costs of mating
sexual conflict
Coelopa frigida
Issue Date: Jun-2005
Publisher: Springer
Citation: Dunn DW, Sumner JP & Goulson D (2005) The benefits of multiple mating to female seaweed flies, Coelopa frigida (Diptera: Coelpidae), Behavioral Ecology and Sociobiology, 58 (2), pp. 128-135.
Abstract: Female seaweed flies, Coelopa frigida, have the potential to benefit from mating more than once. Single matings result in low fertility so females may benefit directly from multiple copulations by sperm replenishment. A chromosomal inversion associated with larval fitness, with heterokaryotypic larvae having higher viability than homokaryotypes, means that polyandrous homokaryotypic females have a higher probability of producing genetically fit offspring than monandrous homokaryotypic females. We allowed females to mate only once, repeatedly four times to the same male, or polyandrously four times to four different males. Multiply mated and polyandrous females laid more eggs and produced more offspring than singly mated and monandrous females, respectively. Polyandrous females laid more eggs, had higher egg-to-adult survival rates and produced more offspring than repeatedly mated females. Fertility rates did not differ between treatments. The observed fitness patterns therefore resulted from increased oviposition through multiple mating per se, and a further increase in oviposition coupled with higher egg-to-adult offspring survival benefits to polyandry. Daily monitoring of individual females over their entire life spans showed that multiple copulations induced early oviposition, with polyandrous females ovipositing earlier than repeatedly mated females. Singly mated and polyandrous females incurred a longevity cost independent of egg production, whereas repeatedly mated females did not. This suggests that repeatedly mating with the same male may counteract a general cost of mating. Longevity, however, was not correlated with overall female fitness. Our data are discussed in the overall context of the seaweed fly mating system.
Type: Journal Article
URI: http://hdl.handle.net/1893/7269
DOI Link: http://dx.doi.org/10.1007/s00265-005-0922-x
Rights: The publisher does not allow this work to be made publicly available in this Repository. Please use the Request a Copy feature at the foot of the Repository record to request a copy directly from the author. You can only request a copy if you wish to use this work for your own research or private study.
Affiliation: University of Southampton
University of Southampton
Biological and Environmental Sciences

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