A behavioral ecology of fishermen: hidden stories from trajectory data in the Northern Humboldt Current System

Descripción del Articulo

Tesis (Doctorat). -- Universite de Montpellier II
Detalles Bibliográficos
Autor: Joo, Rocío
Formato: tesis de maestría
Fecha de Publicación:2013
Institución:Instituto del Mar del Perú
Repositorio:IMARPE-Institucional
Lenguaje:inglés
OAI Identifier:oai:repositorio.imarpe.gob.pe:20.500.12958/2338
Enlace del recurso:https://hdl.handle.net/20.500.12958/2338
Nivel de acceso:acceso abierto
Materia:Localización De Buques
Embarcaciones Pesqueras
Pescadores - Comportamiento
Humboldt Norte
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spelling A behavioral ecology of fishermen: hidden stories from trajectory data in the Northern Humboldt Current SystemJoo, RocíoLocalización De BuquesEmbarcaciones PesquerasPescadores - ComportamientoHumboldt NorteTesis (Doctorat). -- Universite de Montpellier IIThis work proposes an original contribution to the understanding of fishermen spatial behavior, based on the behavioral ecology and movement ecology paradigms. Through the analysis of Vessel Monitoring System (VMS) data, we characterized the spatial behavior of Peruvian anchovy fishermen at different scales: (1) the behavioral modes within fishing trips (i.e., searching, fishing and cruising); (2) the behavioral patterns among fishing trips; (3) the behavioral patterns by fishing season conditioned by ecosystem scenarios; and (4) the computation of maps of anchovy presence proxy from the spatial patterns of behavioral mode positions. At the first scale considered, we compared several Markovian (hidden Markov and semi-Markov models) and discriminative models (random forests, support vector machines and artificial neural networks) for inferring the behavioral modes associated with VMS tracks. The models were trained under a supervised setting and validated using tracks for which behavioral modes were known (from on-board observers records). Hidden semi-Markov models performed better, and were retained for inferring the behavioral modes on the entire VMS dataset. At the second scale considered, each fishing trip was characterized by several features, including the time spent within each behavioral mode. Using a clustering analysis, fishing trip patterns were classified into groups associated to management zones, fleet segments and skippers’ personalities. At the third scale considered, we analyzed how ecological conditions shaped fishermen behavior. By means of co-inertia analyses, we found significant associations between fishermen, anchovy and environmental spatial dynamics, and fishermen behavioral responses were characterized according to contrasted environmental scenarios. At the fourth scale considered, we investigated whether the spatial behavior of fishermen reflected to some extent the spatial distribution of anchovy. Finally, this work provides a wider view of fishermen behavior: fishermen are not only economic agents, but they are also foragers, constrained by ecosystem variability. To conclude, we discuss how these findings may be of importance for fisheries management, collective behavior analyses and end-to-end models.IRD / IMARPEMontpellier, Francia2015-08-18T15:54:36Z2015-08-18T15:54:36Z2013info:eu-repo/semantics/masterThesisapplication/pdfhttps://hdl.handle.net/20.500.12958/2338Instituto del Mar del Perú - IMARPERepositorio Digital IMARPEreponame:IMARPE-Institucionalinstname:Instituto del Mar del Perúinstacron:IMARPEenginfo:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by/4.0/oai:repositorio.imarpe.gob.pe:20.500.12958/23382021-06-11T08:12:22Z
dc.title.none.fl_str_mv A behavioral ecology of fishermen: hidden stories from trajectory data in the Northern Humboldt Current System
title A behavioral ecology of fishermen: hidden stories from trajectory data in the Northern Humboldt Current System
spellingShingle A behavioral ecology of fishermen: hidden stories from trajectory data in the Northern Humboldt Current System
Joo, Rocío
Localización De Buques
Embarcaciones Pesqueras
Pescadores - Comportamiento
Humboldt Norte
title_short A behavioral ecology of fishermen: hidden stories from trajectory data in the Northern Humboldt Current System
title_full A behavioral ecology of fishermen: hidden stories from trajectory data in the Northern Humboldt Current System
title_fullStr A behavioral ecology of fishermen: hidden stories from trajectory data in the Northern Humboldt Current System
title_full_unstemmed A behavioral ecology of fishermen: hidden stories from trajectory data in the Northern Humboldt Current System
title_sort A behavioral ecology of fishermen: hidden stories from trajectory data in the Northern Humboldt Current System
dc.creator.none.fl_str_mv Joo, Rocío
author Joo, Rocío
author_facet Joo, Rocío
author_role author
dc.subject.none.fl_str_mv Localización De Buques
Embarcaciones Pesqueras
Pescadores - Comportamiento
Humboldt Norte
topic Localización De Buques
Embarcaciones Pesqueras
Pescadores - Comportamiento
Humboldt Norte
description Tesis (Doctorat). -- Universite de Montpellier II
publishDate 2013
dc.date.none.fl_str_mv 2013
2015-08-18T15:54:36Z
2015-08-18T15:54:36Z
dc.type.none.fl_str_mv info:eu-repo/semantics/masterThesis
format masterThesis
dc.identifier.none.fl_str_mv https://hdl.handle.net/20.500.12958/2338
url https://hdl.handle.net/20.500.12958/2338
dc.language.none.fl_str_mv eng
language eng
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
https://creativecommons.org/licenses/by/4.0/
eu_rights_str_mv openAccess
rights_invalid_str_mv https://creativecommons.org/licenses/by/4.0/
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Montpellier, Francia
publisher.none.fl_str_mv Montpellier, Francia
dc.source.none.fl_str_mv Instituto del Mar del Perú - IMARPE
Repositorio Digital IMARPE
reponame:IMARPE-Institucional
instname:Instituto del Mar del Perú
instacron:IMARPE
instname_str Instituto del Mar del Perú
instacron_str IMARPE
institution IMARPE
reponame_str IMARPE-Institucional
collection IMARPE-Institucional
repository.name.fl_str_mv
repository.mail.fl_str_mv
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score 13.936249
A behavioral ecology of fishermen: hidden stories from trajectory data in the Northern Humboldt Current System
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