Post-Zygotic Isolation and Haldane’s Rule in Two Closely Related Lake Malawi Cichlid Species

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dc.contributor.advisorDanley, Patrick D.
dc.contributor.authorBrashears, Caitlyn
dc.contributor.departmentUniversity Scholars.en_US
dc.contributor.schoolsHonors College.en_US
dc.date.accessioned2016-08-08T17:05:51Z
dc.date.available2016-08-08T17:05:51Z
dc.date.copyright2016-05
dc.date.issued2016-08-08
dc.description.abstractCichlid fishes from the Great Lakes in East Africa experienced an extensive, rapid, and recent diversification resulting in over 2,000 species of fish over the course of 10 million years. Such extraordinary diversification is thought to have been driven by behavioral pre-zygotic isolation. However, limited research has been conducted evaluating the role of post-zygotic isolation in promoting the reproductive isolation of African Cichlid fishes. In order to test the hypothesis that post-zygotic isolation contributes to the reproductive isolation of two closely related Lake Malawi African Cichlid fishes, Maylandia benetos and Maylandia zebra, I artificially created conspecific and reciprocal hybrid crosses and examined the fitness of the first generation. Fertilization rate, hatching rate, survival rate, and sex ratios were analyzed and compared. I found no differences in fertilization rate, hatching rate, or survival rate. However, the interspecific cross with a M. benetos female produced no male offspring. The absence of males in the interspecific cross with a M. benetos female may provide support for the hypothesis that post-zygotic isolation contributes to the reproductive isolation of M. benetos and M. zebra.en_US
dc.identifier.urihttp://hdl.handle.net/2104/9680
dc.language.isoen_USen_US
dc.rightsBaylor University projects are protected by copyright. They may be viewed from this source for any purpose, but reproduction or distribution in any format is prohibited without written permission. Contact libraryquestions@baylor.edu for inquiries about permission.en_US
dc.rights.accessrightsWorldwide access.en_US
dc.rights.accessrightsAccess changed 7/9/18.
dc.subjectBiologyen_US
dc.titlePost-Zygotic Isolation and Haldane’s Rule in Two Closely Related Lake Malawi Cichlid Speciesen_US
dc.typeThesisen_US

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