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Tuesday, April 24 • 2:20pm - 2:40pm
Continued Exploration Of Conditions Favoring The Evolution Of Superfetation Using A State Dependent Life History Model

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Superfetation is characterized by the ability of an organism to simultaneous carry multiple offspring to term. Further, each offspring may be in a different stage of development. Superfetation has been observed, with varying degrees of confidence, in a wide range of species, most significant being members of the live-bearing fish family Poeciliidae; however, the evolutionary origins of the phenomenon are still unclear. This research builds off previous investigations into the evolutionary origins of superfetation, using a state-dependent life history model. Although the previous model realistically described reproductive decisions for a female poeciliid, the model did not predict superfetation. The goal of this project was to modify the previous model to determine under what circumstances superfetation is predicted. Creative changes to a variety of axioms present in the previous model are being implemented within the programming environment R. Examples of such changes include, but are not limited to, alterations to both the minimum resource requirements for offspring viability, and the assumptions concerning the distribution of resources amongst developing embryos.


Tuesday April 24, 2018 2:20pm - 2:40pm PDT
014 Zeis Hall

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