Temperature-mediated Feeding Between Spring-associated and Riverine-associated Congeners, with Implications for Community Segregation

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dc.contributor.authorCraig, Cody A.
dc.contributor.authorMaikoetter, Jeremy D.
dc.contributor.authorBonner, Timothy H.
dc.date.accessioned2019-07-31T20:47:01Z
dc.date.available2019-07-31T20:47:01Z
dc.date.issued2019-01
dc.description.abstractFreshwater fish communities segregate along water temperature gradients attributed in part to temperature-mediated physiological processes that affect species fitness. In spring complexes of southwest USA, spring complexes with narrow range of water temperatures are dominated by a community of fishes (i.e., spring-associated fishes), whereas riverine habitats with wide-range of water temperatures are dominated by a different community of fishes (i.e., riverine-associated fishes). The purpose of this study was to test a prediction of the concept that temperature-mediated species performance is a mechanism in maintaining community segregation. We predicted that a spring-associated fish (Largespring Gambusia Gambusia geiseri) would feed first and more often in a pairing with a riverine-associated fish (Western Mosquitofish G. affinis) at an average spring temperature (23 °C) and that the riverine-associated fish would feed first and more often in a pairing with the spring-associated fish at a warm riverine temperature (30 °C). Among four trails consisting of 30 pairings, at the spring complex temperature (23 °C), Largespring Gambusia had a greater number of first feeds (mean ± 1 SD, 5.0 ± 0.82) than Western Mosquitofish (2.5 ± 1.73) and had greater mean number of total feeds (1.9 ± 0.31) than Western Mosquitofish (0.81 ± 0.70). At the riverine environment temperature (30 °C), Western Mosquitofish had a greater number of first feeds (5.25 ± 1.71) than Largespring Gambusia (2.5 ± 1.73) and had greater mean number of total feeds (2.78 ± 1.05) than Largespring Gambusia (0.94 ± 0.68). Our findings suggest that temperature-mediated species performance could be maintaining segregation between the two fish communities. This study benefits our understanding of distributional patterns and improves threat assessments of stenothermal aquatic organisms.
dc.description.departmentBiology
dc.formatText
dc.format.extent10 pages
dc.format.medium1 file (.pdf)
dc.identifier.citationCraig, C. A., Maikoetter, J. D., & Bonner, T. H. (2019). Temperature-mediated feeding between spring-associated and riverine-associated congeners, with implications for community segregation. PeerJ, 6(e6144).
dc.identifier.doihttps://doi.org/10.7717/peerj.6144
dc.identifier.urihttps://hdl.handle.net/10877/8436
dc.language.isoen
dc.publisherPeerJ Inc.
dc.rights.holder© 2019 Craig et al.
dc.rights.licenseThis work is licensed under a Creative Commons Attribution 4.0 International License.
dc.sourcePeerJ, 2019, Vol. 6, Article e6144.
dc.subjectaquaculture
dc.subjectfisheries and fish science
dc.subjectecology
dc.subjectfreshwater biology
dc.subjecttemperature-mediated
dc.subjectfeeding performance
dc.subjectstenothermal
dc.subjecteurythermal
dc.subjectcondition specific performance
dc.subjectGambusia
dc.subjectGambusia geiseri
dc.subjectanimal behavior
dc.subjectGambusia affinis
dc.subjectspring complex
dc.subjectanimal behavior
dc.subjectBiology
dc.titleTemperature-mediated Feeding Between Spring-associated and Riverine-associated Congeners, with Implications for Community Segregation
dc.typeArticle

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