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Niche overlap by invasion of Oncorhynchus mykiss on the habitat of its amphibian prey in central Mexico

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Abstract

The introduction of exotic species is one of the main leading factors in the decline and extinction of amphibian populations worldwide. Reductions in the abundance and local extinctions of amphibians due to the introduction of exotic fishes in rivers or lakes have been reported worldwide. To help prevent further extinctions, studies are needed in order to make appropriate conservation decisions. In the present study, environmental niche modeling (ENM) was used to identify the environmental niche overlap and land-use and vegetation cover variables that favor the presence of the invasive species Rainbow trout (Oncorhynchus mykiss) and its amphibian prey, including the Mountain stream salamander (Ambystoma altamirani), Mountain tree frog (Dryophytes eximius), and Ridged tree frog (Dryophytes plicatus) in central Mexico. We found that the potential distributions and environmental niches of O. mykiss and its amphibian prey are similar, which may affect the amphibian populations in several ways, including the displacement of these species from their distribution area in the long term. The information generated in this study is critical for proposing better conservation strategies for these amphibian species as well as management solutions for the invasive O. mykiss hatcheries.

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Acknowledgements

We are grateful to the editor and two anonymous reviewers for their comments. We thank Andrea González-Fernández for her help with fieldwork and advice on the analyses. We thank Laura Gilchrist for the English language review. J.R.R is grateful to the graduate program Maestría en Ciencias Agropecuarias y Recursos Naturales to Universidad Autónoma del Estado de México for the scholarship granted and the scholarships received from CONAHCYT (1190269). R.L.H.B was on his postdoctoral stay at UAEMex (CONAHCYT: 2995280/94/2022). This work was supported by the Secretary of Research and Advanced Studies (SYEA) of the Universidad Autónoma del Estado de México (Grants to AS: 4732/2019CIB and 6801/2022CID), SEP (Grant to AS: PRODEP 511/2022-5401) and CONACYT (Grant to AS: FOINS 6828/2017). A.S: Adahy Olun Contreras-García yo nunca te abandoné, estoy haciendo todo para que la justicia mexicana me permita volver a estar contigo, pero es un proceso muy lento, te extraño mucho.

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All the authors contributed to the study conception and design, material preparation, and data collection and analysis. The first draft of the manuscript was written by Armando Sunny, and all the authors commented on previous versions of the manuscript. All the authors read and approved the final manuscript. All the data will be made available upon reasonable request.

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Correspondence to Armando Sunny.

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Sunny, A., Ruiz-Reyes, J., Domínguez-Vega, H. et al. Niche overlap by invasion of Oncorhynchus mykiss on the habitat of its amphibian prey in central Mexico. Biol Invasions (2024). https://doi.org/10.1007/s10530-024-03304-7

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  • DOI: https://doi.org/10.1007/s10530-024-03304-7

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