Into the wild : escaped farmed rainbow trout show a dispersal-associated diet shift towards natural prey

Autores
Nabaes Jodar, Diego Nicolás; Cussac, Victor Enrique; Becker, Leandro Anibal
Año de publicación
2019
Idioma
inglés
Tipo de recurso
artículo
Estado
versión aceptada
Descripción
The feeding ecology of farmed fish escapees has seldom been assessed, although they are one of aquaculture’s main environmental impacts. Here we tested if the diet of Oncorhynchus mykiss rainbow trout escapees was affected by their dispersal from farms in a reservoir in Argentine Patagonia by combining stomach content and stable isotope data, and compared their spatial patternswith those of caged and wild (previously naturalized) conspecifics. Our results reveal a shift in the stomach content and d13C values of escapees, reflecting a farm (pellets) to wild (mainly Daphnia sp.) diet transition associated to dispersal from farms. The d13C signal of escapees sampled within the farming area was close to that of caged fish, whereas the d13C of escapees captured far from it was indistinguishable from that of wild rainbow trout. Furthermore, escapee dispersal from farms was associated with a transition from indiscriminate surface feeding (on indigestible floating items) typical of caged fish to preying heavily on Daphnia sp. In contrast, wild fish diet was homogeneous across all sites. Farm escapees gradually acquiring the feeding behavior of their wild conspecifics as they disperse from the farms may promote competition for food and space, and increase their chances for survival in the wild.
Fil: Nabaes Jodar, Diego Nicolás. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina.
Fil: Nabaes Jodar, Diego Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Andino Patagónico de Tecnologías Biológicas y Geoambientales; Argentina.
Fil: Cussac, Victor Enrique. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina.
Fil: Cussac, Victor Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Andino Patagónico de Tecnologías Biológicas y Geoambientales; Argentina.
Fil: Becker, Leandro Anibal. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina.
Fil: Becker, Leandro Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Diversidad y Evolución Austral; Argentina.
Fuente
Hydrobiologia. Núm. 847 (2020)
Materia
Farm escapees
Feeding behavior
Freshwater aquaculture
Oncorhynchus mykiss
Stable isotopes
Stomach contents
Ciencias de la Tierra y Medio Ambiente
Nivel de accesibilidad
acceso abierto
Condiciones de uso
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
Repositorio
Repositorio Digital Institucional (UNCo)
Institución
Universidad Nacional del Comahue
OAI Identificador
oai:rdi.uncoma.edu.ar:uncomaid/17159
Acceder
id RDIUNCO_14f751a280c77be0dcba4e6709c62060
oai_identifier_str oai:rdi.uncoma.edu.ar:uncomaid/17159
network_acronym_str RDIUNCO
repository_id_str 7108
network_name_str Repositorio Digital Institucional (UNCo)
spelling Into the wild : escaped farmed rainbow trout show a dispersal-associated diet shift towards natural preyNabaes Jodar, Diego NicolásCussac, Victor EnriqueBecker, Leandro AnibalFarm escapeesFeeding behaviorFreshwater aquacultureOncorhynchus mykissStable isotopesStomach contentsCiencias de la Tierra y Medio AmbienteThe feeding ecology of farmed fish escapees has seldom been assessed, although they are one of aquaculture’s main environmental impacts. Here we tested if the diet of Oncorhynchus mykiss rainbow trout escapees was affected by their dispersal from farms in a reservoir in Argentine Patagonia by combining stomach content and stable isotope data, and compared their spatial patternswith those of caged and wild (previously naturalized) conspecifics. Our results reveal a shift in the stomach content and d13C values of escapees, reflecting a farm (pellets) to wild (mainly Daphnia sp.) diet transition associated to dispersal from farms. The d13C signal of escapees sampled within the farming area was close to that of caged fish, whereas the d13C of escapees captured far from it was indistinguishable from that of wild rainbow trout. Furthermore, escapee dispersal from farms was associated with a transition from indiscriminate surface feeding (on indigestible floating items) typical of caged fish to preying heavily on Daphnia sp. In contrast, wild fish diet was homogeneous across all sites. Farm escapees gradually acquiring the feeding behavior of their wild conspecifics as they disperse from the farms may promote competition for food and space, and increase their chances for survival in the wild.Fil: Nabaes Jodar, Diego Nicolás. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina.Fil: Nabaes Jodar, Diego Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Andino Patagónico de Tecnologías Biológicas y Geoambientales; Argentina.Fil: Cussac, Victor Enrique. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina.Fil: Cussac, Victor Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Andino Patagónico de Tecnologías Biológicas y Geoambientales; Argentina.Fil: Becker, Leandro Anibal. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina.Fil: Becker, Leandro Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Diversidad y Evolución Austral; Argentina.Springer2019-10-23info:eu-repo/semantics/articleinfo:eu-repo/semantics/acceptedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfpp. 105-120application/pdf1573-5117http://rdi.uncoma.edu.ar/handle/uncomaid/17159Hydrobiologia. Núm. 847 (2020)reponame:Repositorio Digital Institucional (UNCo)instname:Universidad Nacional del Comahueenghttps://link.springer.com/article/10.1007/s10750-019-04075-2info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/2025-10-23T11:16:45Zoai:rdi.uncoma.edu.ar:uncomaid/17159instacron:UNCoInstitucionalhttp://rdi.uncoma.edu.ar/Universidad públicaNo correspondehttp://rdi.uncoma.edu.ar/oaimirtha.mateo@biblioteca.uncoma.edu.ar; adriana.acuna@biblioteca.uncoma.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:71082025-10-23 11:16:45.591Repositorio Digital Institucional (UNCo) - Universidad Nacional del Comahuefalse
dc.title.none.fl_str_mv Into the wild : escaped farmed rainbow trout show a dispersal-associated diet shift towards natural prey
title Into the wild : escaped farmed rainbow trout show a dispersal-associated diet shift towards natural prey
spellingShingle Into the wild : escaped farmed rainbow trout show a dispersal-associated diet shift towards natural prey
Nabaes Jodar, Diego Nicolás
Farm escapees
Feeding behavior
Freshwater aquaculture
Oncorhynchus mykiss
Stable isotopes
Stomach contents
Ciencias de la Tierra y Medio Ambiente
title_short Into the wild : escaped farmed rainbow trout show a dispersal-associated diet shift towards natural prey
title_full Into the wild : escaped farmed rainbow trout show a dispersal-associated diet shift towards natural prey
title_fullStr Into the wild : escaped farmed rainbow trout show a dispersal-associated diet shift towards natural prey
title_full_unstemmed Into the wild : escaped farmed rainbow trout show a dispersal-associated diet shift towards natural prey
title_sort Into the wild : escaped farmed rainbow trout show a dispersal-associated diet shift towards natural prey
dc.creator.none.fl_str_mv Nabaes Jodar, Diego Nicolás
Cussac, Victor Enrique
Becker, Leandro Anibal
author Nabaes Jodar, Diego Nicolás
author_facet Nabaes Jodar, Diego Nicolás
Cussac, Victor Enrique
Becker, Leandro Anibal
author_role author
author2 Cussac, Victor Enrique
Becker, Leandro Anibal
author2_role author
author
dc.subject.none.fl_str_mv Farm escapees
Feeding behavior
Freshwater aquaculture
Oncorhynchus mykiss
Stable isotopes
Stomach contents
Ciencias de la Tierra y Medio Ambiente
topic Farm escapees
Feeding behavior
Freshwater aquaculture
Oncorhynchus mykiss
Stable isotopes
Stomach contents
Ciencias de la Tierra y Medio Ambiente
dc.description.none.fl_txt_mv The feeding ecology of farmed fish escapees has seldom been assessed, although they are one of aquaculture’s main environmental impacts. Here we tested if the diet of Oncorhynchus mykiss rainbow trout escapees was affected by their dispersal from farms in a reservoir in Argentine Patagonia by combining stomach content and stable isotope data, and compared their spatial patternswith those of caged and wild (previously naturalized) conspecifics. Our results reveal a shift in the stomach content and d13C values of escapees, reflecting a farm (pellets) to wild (mainly Daphnia sp.) diet transition associated to dispersal from farms. The d13C signal of escapees sampled within the farming area was close to that of caged fish, whereas the d13C of escapees captured far from it was indistinguishable from that of wild rainbow trout. Furthermore, escapee dispersal from farms was associated with a transition from indiscriminate surface feeding (on indigestible floating items) typical of caged fish to preying heavily on Daphnia sp. In contrast, wild fish diet was homogeneous across all sites. Farm escapees gradually acquiring the feeding behavior of their wild conspecifics as they disperse from the farms may promote competition for food and space, and increase their chances for survival in the wild.
Fil: Nabaes Jodar, Diego Nicolás. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina.
Fil: Nabaes Jodar, Diego Nicolás. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Andino Patagónico de Tecnologías Biológicas y Geoambientales; Argentina.
Fil: Cussac, Victor Enrique. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina.
Fil: Cussac, Victor Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto Andino Patagónico de Tecnologías Biológicas y Geoambientales; Argentina.
Fil: Becker, Leandro Anibal. Universidad Nacional del Comahue. Centro Regional Universitario Bariloche; Argentina.
Fil: Becker, Leandro Anibal. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Diversidad y Evolución Austral; Argentina.
description The feeding ecology of farmed fish escapees has seldom been assessed, although they are one of aquaculture’s main environmental impacts. Here we tested if the diet of Oncorhynchus mykiss rainbow trout escapees was affected by their dispersal from farms in a reservoir in Argentine Patagonia by combining stomach content and stable isotope data, and compared their spatial patternswith those of caged and wild (previously naturalized) conspecifics. Our results reveal a shift in the stomach content and d13C values of escapees, reflecting a farm (pellets) to wild (mainly Daphnia sp.) diet transition associated to dispersal from farms. The d13C signal of escapees sampled within the farming area was close to that of caged fish, whereas the d13C of escapees captured far from it was indistinguishable from that of wild rainbow trout. Furthermore, escapee dispersal from farms was associated with a transition from indiscriminate surface feeding (on indigestible floating items) typical of caged fish to preying heavily on Daphnia sp. In contrast, wild fish diet was homogeneous across all sites. Farm escapees gradually acquiring the feeding behavior of their wild conspecifics as they disperse from the farms may promote competition for food and space, and increase their chances for survival in the wild.
publishDate 2019
dc.date.none.fl_str_mv 2019-10-23
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/acceptedVersion
http://purl.org/coar/resource_type/c_6501
info:ar-repo/semantics/articulo
format article
status_str acceptedVersion
dc.identifier.none.fl_str_mv 1573-5117
http://rdi.uncoma.edu.ar/handle/uncomaid/17159
identifier_str_mv 1573-5117
url http://rdi.uncoma.edu.ar/handle/uncomaid/17159
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv https://link.springer.com/article/10.1007/s10750-019-04075-2
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.format.none.fl_str_mv application/pdf
pp. 105-120
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
dc.source.none.fl_str_mv Hydrobiologia. Núm. 847 (2020)
reponame:Repositorio Digital Institucional (UNCo)
instname:Universidad Nacional del Comahue
reponame_str Repositorio Digital Institucional (UNCo)
collection Repositorio Digital Institucional (UNCo)
instname_str Universidad Nacional del Comahue
repository.name.fl_str_mv Repositorio Digital Institucional (UNCo) - Universidad Nacional del Comahue
repository.mail.fl_str_mv mirtha.mateo@biblioteca.uncoma.edu.ar; adriana.acuna@biblioteca.uncoma.edu.ar
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score 12.982451

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