Literaturdatenbank
Literaturdatenbank |
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Pearson, S. H., Spotila, J. R., & Avery, H. W. , Competition between red-bellied turtles (pseudemys rubriventris) and invasive red-eared slider turtles (trachemys scripta elegans). Unpublished paper presented at 2013 Annual Conference.
Added by: Admin (06 Jan 2014 18:25:07 UTC) |
| Resource type: Conference Paper BibTeX citation key: Pearson2013 View all bibliographic details  |
Categories: General Keywords: Emydidae, Ernährung - nutrition, Habitat - habitat, invasive Arten - invasive species, Pseudemys rubriventris, Schildkröten - turtles + tortoises, Trachemys scripta Creators: Avery, Pearson, Spotila Collection: 2013 Annual Conference |
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| Abstract |
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Invasive species affect populations and communities of wildlife worldwide through predation and competition for limited resources. Globally, the invasive red-eared slider turtle (Trachemys scripta elegans) may compete with native turtles for limited food, basking and other wetland resources. In the Delaware Estuary, the red-eared slider turtle is ecologically similar to the red-bellied turtle (Pseudemys rubriventris). Red-bellied turtles have undergone population declines in wetlands where red-eared slider turtles have been introduced. In anthropogenically degraded wetlands the potential for competition may be greater between red-eared slider turtles and red-bellied turtles due to extensive overlap for dietary resources and habitat use. We performed manipulative experiments with juvenile turtles of both species to determine the underlying mechanisms of how red-eared slider turtles may compete with red-bellied turtles for limited resources. Using mesocosms, we housed single and mixed species groups at low and high densities to determine the mechanisms of competition for limited dietary and thermoregulatory resources. We determined ingestion rates, growth rates and behavioral interactions of turtles to determine whether red-eared slider turtles outcompete red-bellied turtles for limited dietary and thermoregulatory resources. Preliminary results indicate that the growth rate and ingestion rates of red-bellied turtles can be suppressed when housed with red-eared slider turtles under limited resource conditions. Understanding the mechanisms of competition between red-eared slider turtles and red-bellied turtles will allow us to understand the long term impacts of the red-eared slider turtle invasions on ecologically similar native species.
Added by: Admin |