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  Copulation order, density cues and variance in fertilization success in a cestode

Andreou, D., & Benesh, D. P. (2014). Copulation order, density cues and variance in fertilization success in a cestode. Parasitology, 141(7), 934-939. doi:10.1017/S0031182014000043.

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Item Permalink: http://hdl.handle.net/11858/00-001M-0000-0018-16CB-2 Version Permalink: http://hdl.handle.net/11858/00-001M-0000-0019-802D-C
Genre: Journal Article

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Andreou_2014.pdf (Publisher version), 219KB
 
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 Creators:
Andreou, D.1, Author              
Benesh, D. P.1, Author              
Affiliations:
1Department Evolutionary Ecology, Max Planck Institute for Evolutionary Biology, Max Planck Society, ou_1445634              

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Free keywords: copulation order; Schistocephalus solidus; sperm competition; simultaneous hermaphrodite; sex allocation; sexual selection
 Abstract: Simultaneous hermaphrodites maximize their fitness by optimizing their investment into male or female functions. Allocation of resources to male function (tissues, traits, and/or behaviours increasing paternity) is predicted to increase as density, and the associated level of sperm competition, increases. We tested whether the simultaneous hermaphroditic cestode Schistocephalus solidus uses cues of potential partner densities in its fish intermediate host to improve its male reproductive success in the final host. We had two worms, one originating from a multiple infection in the fish intermediate host and one from a single infection, sequentially compete to fertilize the eggs of a third worm. The fertilization rates of the two competitors nearly always differed from the 50–50 null expectation, sometimes considerably, implying there was a ‘winner’ in each experimental competition. However, we did not find a significant effect of density in the fish host (single vs multiple) or mating order on paternity. Additional work will be needed to identify the traits and environmental conditions that explain the high variance in male reproductive success observed in this experiment.

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Language(s): eng - English
 Dates: 2013-12-222013-09-062014-01-032014-02-202014-06
 Publication Status: Published in print
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 Identifiers: DOI: 10.1017/S0031182014000043
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Title: Parasitology
Source Genre: Journal
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Publ. Info: London : Cambridge University Press.
Pages: - Volume / Issue: 141 (7) Sequence Number: - Start / End Page: 934 - 939 Identifier: ISSN: 0031-1820 (print)
ISSN: 1469-8161 (online)
CoNE: /journals/resource/954925341725