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dc.contributor.author
Giese, Adriana Carolina
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dc.contributor.author
Garcia Asorey, Martin Ignacio
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dc.contributor.author
Casalinuovo, Miguel Angel
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dc.contributor.author
Amaya Santi, María Marcela
dc.contributor.author
Kennedy, Brian Patrick
dc.contributor.author
Pascual, Miguel Alberto
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dc.date.available
2023-08-18T14:10:24Z
dc.date.issued
2022-10
dc.identifier.citation
Giese, Adriana Carolina; Garcia Asorey, Martin Ignacio; Casalinuovo, Miguel Angel; Amaya Santi, María Marcela; Kennedy, Brian Patrick; et al.; Surfing the tide: Homeward migration of sea trout (Salmo trutta) in a Patagonian river; Wiley Blackwell Publishing, Inc; Journal of Fish Biology; 101; 4; 10-2022; 925-936
dc.identifier.issn
0022-1112
dc.identifier.uri
http://hdl.handle.net/11336/208697
dc.description.abstract
This study evaluates the influence of marine and freshwater conditions on the timing of river entry and upstream migration of sea trout (Salmo trutta) in the Grande River of Tierra del Fuego, Patagonia. We analysed the in-river catch-and-release records from a group of fishing lodges that dominate the Grande River fishery during January–April 2008 (n = 5029 fish) as a function of environmental variables: tidal amplitude, stage in the lunar cycle, river discharge, and river water temperature along the homeward migration season. We discuss the value of the daily catch rate as an abundance index in the Grande river, then analyse the temporal structure of the tidal cycle in the Grande River estuary, a macro-tidal environment with a mean tidal amplitude of 5.7 m, and analyse the fit of a generalized additive model to trout catches on a daily basis in four sections along the river to identify the environmental variables that may affect trout abundance throughout the homeward migration. Fish catches in each section of the river were differentially affected by specific environmental variables: tidal amplitude had a positive and significant effect on catches in the lower river sections, whereas water temperature and river discharge significantly affected catches in upper sections (positive effect of temperature; negative effect of discharge). Catches in the lower section clearly reflect the river entry stage of the homeward migration, with a bi-modal shape significantly correlated with the tidal cycle. The first peak was composed mainly of larger multi-sea-winter trout that move upstream, whereas the second one had a wider range of fish lengths, including a large proportion of small and maybe nonreproductive trout that overwinter in the lower river. Based on our results, we conclude that the large tides in the Grande River estuary strongly affect the river entry timing of sea trout. The underlying mechanisms of this effect may be a combination of increased olfactory recognition and increased tidal transport modulated by the seasonal tidal cycle, which operates on trout during coastal migration to produce the pulses observed in the Grande River sea trout run. In the middle and upper sections of the river, where the tidal effect at river entry was dissipated as upstream migration progressed, trout catches increased with water temperature and decreased with river discharge, which may operate through their influence on in-river migration rate and abundance, but also through changes in catchability.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
Wiley Blackwell Publishing, Inc
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
ANADROMY
dc.subject
GAM
dc.subject
MIGRATION TIMING
dc.subject
PATAGONIA
dc.subject
SALMO TRUTTA
dc.subject
SPRING-NEAP TIDAL CYCLE
dc.subject.classification
Biología Marina, Limnología
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dc.subject.classification
Ciencias Biológicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Surfing the tide: Homeward migration of sea trout (Salmo trutta) in a Patagonian river
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2023-07-05T15:07:02Z
dc.journal.volume
101
dc.journal.number
4
dc.journal.pagination
925-936
dc.journal.pais
Reino Unido
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dc.journal.ciudad
Londres
dc.description.fil
Fil: Giese, Adriana Carolina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico para el Estudio de los Ecosistemas Continentales; Argentina
dc.description.fil
Fil: Garcia Asorey, Martin Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico para el Estudio de los Ecosistemas Continentales; Argentina. Grupo de Investigación y Desarrollo Tecnologico En Acuicultura y Pesca. - Universidad Tecnologica Nacional. Facultad Regional Chubut. Grupo de Investigacion y Desarrollo Tecnologico En Acuicultura y Pesca.; Argentina
dc.description.fil
Fil: Casalinuovo, Miguel Angel. Dirección de Manejo de Recursos Ícticos Continentales; Argentina
dc.description.fil
Fil: Amaya Santi, María Marcela. Universidad Nacional de la Patagonia Austral. Unidad Académica Río Gallegos; Argentina
dc.description.fil
Fil: Kennedy, Brian Patrick. University of Idaho; Estados Unidos
dc.description.fil
Fil: Pascual, Miguel Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto Patagónico para el Estudio de los Ecosistemas Continentales; Argentina
dc.journal.title
Journal of Fish Biology
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://onlinelibrary.wiley.com/doi/10.1111/jfb.15151
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/http://dx.doi.org/10.1111/jfb.15151
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