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
- Institución
- Universidad Nacional del Comahue
- OAI Identificador
- oai:rdi.uncoma.edu.ar:uncomaid/17159
Ver los metadatos del registro completo
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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/2025-09-29T14:28:42Zoai: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:71082025-09-29 14:28:43.06Repositorio 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 |
_version_ |
1844621547896045568 |
score |
12.559606 |