Spatial structure imposes sex-specific costs but does not reduce interlocus sexual conflict
Spatial structure is a common feature of all naturally occurring populations. Theoretically, spatial structuring of a habitat could modulate the intensity of Interlocus sexual conflict (ISC) in a population, possibly by modulating intersexual encounter rate. We tested this theory using laboratory po...
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Published in | bioRxiv |
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Main Authors | , , , , , |
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Cold Spring Harbor
Cold Spring Harbor Laboratory Press
03.03.2024
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Abstract | Spatial structure is a common feature of all naturally occurring populations. Theoretically, spatial structuring of a habitat could modulate the intensity of Interlocus sexual conflict (ISC) in a population, possibly by modulating intersexual encounter rate. We tested this theory using laboratory populations of Drosophila melanogaster by measuring male induced fitness decline in females in three-patch habitat systems under two alternative habitat types, structured-interconnected and unstructured. Our results on reproductive and survival costs in females suggested significant costs due to (a) male presence (i.e., ISC) and (b) living on structured habitat. However, there was only a weak evidence supporting the theory of modulation of ISC by habitat structuring only. Through a follow up experiment, we further showed that the effect of habitat on ISC is also robust to the alteration of female conditions. Therefore, it appears that spatial structuring per se is unlikely to modulate ISC, but can impose additional survival costs. We further showed such survival cost could be sex-specific possibly reflecting female biased spontaneous dispersal.Competing Interest StatementThe authors have declared no competing interest.Footnotes* The manuscript re-written in almost every section. Some of the data have been re-analysed. The major conclusion from the work has remained same. However, there are a number changes. The manuscript has now undergone review, and is accepted for publication in the Biological Journal of Linnean Society. |
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AbstractList | Spatial structure is a common feature of all naturally occurring populations. Theoretically, spatial structuring of a habitat could modulate the intensity of Interlocus sexual conflict (ISC) in a population, possibly by modulating intersexual encounter rate. We tested this theory using laboratory populations of Drosophila melanogaster by measuring male induced fitness decline in females in three-patch habitat systems under two alternative habitat types, structured-interconnected and unstructured. Our results on reproductive and survival costs in females suggested significant costs due to (a) male presence (i.e., ISC) and (b) living on structured habitat. However, there was only a weak evidence supporting the theory of modulation of ISC by habitat structuring only. Through a follow up experiment, we further showed that the effect of habitat on ISC is also robust to the alteration of female conditions. Therefore, it appears that spatial structuring per se is unlikely to modulate ISC, but can impose additional survival costs. We further showed such survival cost could be sex-specific possibly reflecting female biased spontaneous dispersal.Competing Interest StatementThe authors have declared no competing interest.Footnotes* The manuscript re-written in almost every section. Some of the data have been re-analysed. The major conclusion from the work has remained same. However, there are a number changes. The manuscript has now undergone review, and is accepted for publication in the Biological Journal of Linnean Society. |
Author | Verma, Tanya Tewari, Swadha Halder, Subhasish Kar, Shramana Nandy, Bodhisatta Sethi, Simran |
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Copyright | 2024. This article is published under http://creativecommons.org/licenses/by-nc-nd/4.0/ (“the License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. |
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Title | Spatial structure imposes sex-specific costs but does not reduce interlocus sexual conflict |
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