2023 Early Hearing Detection & Intervention Conference
March 5-7, 2023 • Cincinnati, OH
5/21/2018 | 3:15 PM - 3:30 PM | AN INVESTIGATION OF DEMOGRAPHIC RESPONSE VARIATION AMONG STREAM FISHES AS A MECHANISM TO MAINTAIN COMMUNITY DIVERSITY. | 310 B
AN INVESTIGATION OF DEMOGRAPHIC RESPONSE VARIATION AMONG STREAM FISHES AS A MECHANISM TO MAINTAIN COMMUNITY DIVERSITY.
The southeastern United States retains some of the highest freshwater fish diversity in North America, however it's unclear how this diversity is maintained over evolutionary timescales. Sympatric species in communities are exposed to biotic interactions and the same abiotic environment. These environments can vary over time, some of this variation is regular (e.g. seasonal variation) and some of it is stochastic. There is also documented temporal variation in the persistence and stability of stream fishes, and this has been shown by studies examining how stream fish communities change over time. Key questions that remain is whether or not the species in these communities show similar responses to variation. We investigated potential coexistence mechanisms for fish communities in two piedmont streams in South Carolina using a mark-recapture study to examine variation of a demographical parameter such as survival. Study species included Bluehead chub (Nocomis leptocephalus), Mottled sculpin (Cottus bairdii), Creek chub (Semotilus atromaculatus), and Striped jumprock (Moxostoma rupiscartes). Bi-monthly apparent survival was estimated using a Cormack-Jolly Seber model from the months of September 2015 – March 2018. Interspecies variation in population dynamics can buffer species against environmental change and maintain diversity.
- Fish
- Modeling
- Population
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Presenters/Authors
Kasey Pregler
(), Colorado State University; Department of Fish, Wildlife, and Conservation Biology, kasey.pregler@colostate.edu;
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Seoghyun Kim
(), University of North Carolina at Greensboro, seoghyun.kim@colostate.edu;
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Yoichiro Kanno
(), Colorado State University; Department of Fish, Wildlife, and Conservation Biology, Yoichiro.Kanno@colostate.edu;
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