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Abstract:

The trophic relationship between Torrent Catfish (Hatcheria macraei) and Rainbow Trout (Oncorhynchus mykiss) was studied in a lotic Andean system of Argentina to examine whether these fish compete for the same food resources. Fishes were sampled seasonally, in autumn, spring, and summer. Hatcheria macraei and O. mykiss presented a carnivorous generalist feeding strategy. Trout diet was dominated by aquatic macroinvertebrates, and terrestrial invertebrates were an important component in summer. Large-sized Rainbow Trout fed on Catfish, which in turn preyed mainly on Chironomidae and Elmidae larvae. During flood periods, the Trout diet, as well as that of the Catfish, was mainly composed of clingers (Elmidae and Chironomidae) and particularly in the case of Catfish, burrowers (Oligochaeta) were found. We found an elevated dietary overlap between Trout and Catfish with seasonal changes. Our results suggest that coexistence of Trout and Catfish depends on input of terrestrial invertebrates, and the feeding of Catfish on small prey. Copyright © 2017 AEHMS.

Registro:

Documento: Artículo
Título:Trophic interactions between a native Catfish (Trichomycteridae) and a non-native species, the Rainbow Trout, in an Andean stream, San Juan, Argentina
Autor:Garcia, M.I.; Acosta, J.C.; García, M.L.
Filiación:Departamento de Biología, Facultad de Ciencias Exactas, Físicas y Naturales, Universidad Nacional de San Juan, Av. José Ignacio de la Roza 590 (O), Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), San Juan, Argentina
Centro de Investigaciones de la Geósfera y Biósfera, Consejo Nacional de Investigaciones Científicas y Técnicas (CIGEOBIO–CONICET), San Juan, Argentina
División Zoología Vertebrados, Museo de La Plata (UNLP), Buenos Aires, Argentina
Palabras clave:competition; diet; non-native salmonids; terrestrial and aquatic prey
Año:2017
Volumen:20
Número:4
Página de inicio:344
Página de fin:352
DOI: http://dx.doi.org/10.1080/14634988.2017.1404401
Título revista:Aquatic Ecosystem Health and Management
Título revista abreviado:Aquatic Ecosyst. Health Manage.
ISSN:14634988
CODEN:AEHMF
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_14634988_v20_n4_p344_Garcia

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Citas:

---------- APA ----------
Garcia, M.I., Acosta, J.C. & García, M.L. (2017) . Trophic interactions between a native Catfish (Trichomycteridae) and a non-native species, the Rainbow Trout, in an Andean stream, San Juan, Argentina. Aquatic Ecosystem Health and Management, 20(4), 344-352.
http://dx.doi.org/10.1080/14634988.2017.1404401
---------- CHICAGO ----------
Garcia, M.I., Acosta, J.C., García, M.L. "Trophic interactions between a native Catfish (Trichomycteridae) and a non-native species, the Rainbow Trout, in an Andean stream, San Juan, Argentina" . Aquatic Ecosystem Health and Management 20, no. 4 (2017) : 344-352.
http://dx.doi.org/10.1080/14634988.2017.1404401
---------- MLA ----------
Garcia, M.I., Acosta, J.C., García, M.L. "Trophic interactions between a native Catfish (Trichomycteridae) and a non-native species, the Rainbow Trout, in an Andean stream, San Juan, Argentina" . Aquatic Ecosystem Health and Management, vol. 20, no. 4, 2017, pp. 344-352.
http://dx.doi.org/10.1080/14634988.2017.1404401
---------- VANCOUVER ----------
Garcia, M.I., Acosta, J.C., García, M.L. Trophic interactions between a native Catfish (Trichomycteridae) and a non-native species, the Rainbow Trout, in an Andean stream, San Juan, Argentina. Aquatic Ecosyst. Health Manage. 2017;20(4):344-352.
http://dx.doi.org/10.1080/14634988.2017.1404401