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Interaction with salmonids negatively impacts the growth and body condition of the native Percichthys trucha during its juvenile period

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Título
Interaction with salmonids negatively impacts the growth and body condition of the native Percichthys trucha during its juvenile period
Autor(es)
Afiliación(es) del/de los autor(es)
Reggi, Pablo Ezequiel. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina.
Reggi, Pablo Ezequiel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Barriga, Juan Pablo. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina.
Barriga, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Battini, Miguel Ángel. Universidad Nacional del Comahue. Instituto de Investigaciones en Biodiversidad y Medioambiente; Argentina.
Battini, Miguel Ángel. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina.
Resumen
Understanding trophic interaction between native and non-native species is essential for evaluation of the impact of biological invasions on ecosystems and native populations. We investigated the effect of trophic interaction and competition between juvenile native Percichthys trucha and juveniles of the two most abundant invasive salmonids of North Patagonia (Oncorhynchus mykiss and Salmo trutta). We carried out experiments using enclosures in a river to compare the body condition and growth rate of P. trucha in the absence and presence of each salmonid. We performed two series of experiments using two different sizes of P. trucha, young-of-the-year (Age-0) and one-year-old (Age-1) individuals. Mortality was relatively low for the Age-0 P. trucha, but was markedly higher for Age-1 in the salmonid treatments. Both salmonid species had a negative effect on the body condition and growth rate of P. trucha juveniles, although this was more evident in Age-0 than Age-1 juveniles. This indicates that juvenile P. trucha failed to thrive in the presence of O. mykiss or S. trutta juveniles, resulting in poor body condition at the end of the experiment, with weight loss and negative growth rates. Furthermore, the higher growth rates of both salmonids play a key role in the native–exotic competition, conferring on the exotic species a competitive advantage over the slower-growing P. trucha. This study demonstrates that the susceptibility of juvenile P. trucha to salmonid competition could be a real threat in Patagonian lotic environments.
Año de publicación
Idioma
inglés
Formato (Tipo MIME)
application/vnd.openxmlformats-officedocument.spreadsheetml.sheet
application/vnd.ms-excel
Materia
Salmo trutta; Oncorhynchus mykiss; Percichthys trucha; Patagonia; Competition; Native–exotic interaction; Salmonid invasion; Ciencias de la Tierra y Medio Ambiente; Datos primarios de investigación;
Cobertura geo-temporal
ARG
Condiciones de uso
Disponible en acceso abierto
Repositorio digital
Repositorio Digital Institucional (UNCo) - Universidad Nacional del Comahue
Registro relacionado
https://www.springer.com/journal/10530

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Citación

Reggi, Pablo Ezequiel Battini, Miguel Ángel Barriga, Juan Pablo (): Interaction with salmonids negatively impacts the growth and body condition of the native Percichthys trucha during its juvenile period. Universidad Nacional del Comahue, http://rdi.uncoma.edu.ar/handle/123456789/16363.

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