Intermediate Kinematics Produce Inferior Feeding Performance in a Classic Case of Natural Hybridization

Mc Gee, Matthew David; Reustle, Joseph W.; Oufiero, Christopher E.; Wainwright, Peter C. (2015). Intermediate Kinematics Produce Inferior Feeding Performance in a Classic Case of Natural Hybridization. The American naturalist, 186(6), pp. 807-814. University of Chicago Press 10.1086/683464

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Selection on naturally occurring hybrid individuals is a key component of speciation theory, but few studies examine the functional basis of hybrid performance. We examine the functional consequences of hybridization in nature, using the freshwater sunfishes (Centrarchidae), where natural hybrids have been studied for more than a century and a half. We examined bluegill (Lepomis macrochirus), green sunfish (Lepomis cyanellus), and their naturally occurring hybrid, using prey-capture kinematics and morphology to parameterize suction-feeding simulations on divergent parental resources. Hybrid individuals exhibited kinematics intermediate between those of the two parental species. However, performance assays indicated that hybrids display performance most similar to the worse-performing species for a given parental resource. Our results show that intermediate hybrid phenotypes can be impaired by a less-than-intermediate performance and hence suffer a larger loss in fitness than could be inferred from morphology alone.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Department of Biology > Institute of Ecology and Evolution (IEE)

UniBE Contributor:

Mc Gee, Matthew David

Subjects:

500 Science > 570 Life sciences; biology

ISSN:

0003-0147

Publisher:

University of Chicago Press

Language:

English

Submitter:

Marcel Häsler

Date Deposited:

14 Dec 2015 09:18

Last Modified:

07 May 2019 15:34

Publisher DOI:

10.1086/683464

BORIS DOI:

10.7892/boris.73686

URI:

https://boris.unibe.ch/id/eprint/73686

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