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role of compatibility in determining the costs and benefits of polyandry in the broadcast spawning urchin Lytechinus variegatus.

Title: The role of compatibility in determining the costs and benefits of polyandry in the broadcast spawning urchin Lytechinus variegatus.
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Name(s): Betters, Melissa, author
Type of Resource: text
Genre: Text
Bachelor Thesis
Date Issued: 2017-04-28
Physical Form: computer
online resource
Extent: 1 online resource
Language(s): English
Abstract/Description: When females mate with multiple males is a phenomenon known as polyandry. This is a strategy of sexual reproduction that presents both costs and benefits to female fitness. Mating with multiple males may maximize sperm availability and increase the likelihood of encountering a high-quality male. On the other hand, sperm may become overwhelming and result in polyspermy. With increasing mates, female could increase the risk of encountering low-quality males as well. The research presented in this paper examined how these costs and benefits could potentially affect the fitness of individuals within a broadcast spawning population of marine urchins, Lytechinus variegatus. These organisms release their gametes into the water column, where fertilization occurs externally. This study attempted to examine how fertilization success was affected, if at all, by a female’s eggs encountering sperm from two different males in the water column rather than just one. Urchin color was also controlled for in order to see whether it may be used as a proxy for gametic compatibility between individuals. The data suggested that by pooling males together in the water column, rather than mating with one male at a time, the efficiency of fertilization increased. Therefore, it took less sperm to reach the same fertilization success when males were pooled together than when they were kept apart. Though assortative mating based on color was predicted, the data only showed evidence of this during the trials in which males were pooled together. When females were presented with a single male, male and female identity were instead the best predictors of compatibility.
Identifier: FSU_libsubv1_scholarship_submission_1493414146 (IID)
Keywords: Biology, Sexual selection, Gamete recognition proteins, Marine biology
Persistent Link to This Record: http://purl.flvc.org/fsu/fd/FSU_libsubv1_scholarship_submission_1493414146
Owner Institution: FSU

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Betters, M. (2017). The role of compatibility in determining the costs and benefits of polyandry in the broadcast spawning urchin Lytechinus variegatus. Retrieved from http://purl.flvc.org/fsu/fd/FSU_libsubv1_scholarship_submission_1493414146