Combining fishers' perceptions, landings and an independent survey to evaluate trends in a swimming crab data-poor artisanal fishery

The fishery for the swimming crab Ovalipes trimaculatus in the southwestern Atlantic started in 2007, with an average catch of 64.36 t⋅y −1 during the period between 2008 and 2013. The fishery is under an open access regime and market demand exceeds the catch which raises concern about its future. I...

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Detalles Bibliográficos
Autores principales: de la Barra, P., Iribarne, O., Narvarte, M.
Formato: JOUR
Materias:
Fishers decision
Fishing effort
Making process
Ovalipes trimaculatus
Patagonia
Portunid fishery
San Matías Gulf
Decision making
Fishing vessels
Open access
Population distribution
Shellfish
Fisheries
Decapoda (Crustacea)
Portunidae
Acceso en línea:http://hdl.handle.net/20.500.12110/paper_09645691_v173_n_p26_delaBarra
Aporte de:
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) de Universidad de Buenos Aires
id todo:paper_09645691_v173_n_p26_delaBarra
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spelling todo:paper_09645691_v173_n_p26_delaBarra2023-10-03T15:54:50Z Combining fishers' perceptions, landings and an independent survey to evaluate trends in a swimming crab data-poor artisanal fishery de la Barra, P. Iribarne, O. Narvarte, M. Fishers decision Fishing effort Making process Ovalipes trimaculatus Patagonia Portunid fishery San Matías Gulf Decision making Fishing vessels Open access Population distribution Shellfish Fishers decision Fishing effort Making process Ovalipes trimaculatus Patagonia Fisheries Decapoda (Crustacea) Ovalipes trimaculatus Portunidae The fishery for the swimming crab Ovalipes trimaculatus in the southwestern Atlantic started in 2007, with an average catch of 64.36 t⋅y −1 during the period between 2008 and 2013. The fishery is under an open access regime and market demand exceeds the catch which raises concern about its future. It is also data-poor, which prevents researchers from using traditional assessment methods. The factors that limit the fishing effort were identified by analyzing the fishing operation, the decision making process of the fishers and CPUE. Changes in catch composition through space and time, and the distribution of the population along a depth gradient were also studied. Wind, recent yield and the price of crab were perceived by skippers as relevant factors when deciding to go fishing, but there was no relationship between these variables and monthly fishing effort. However, daily fishing effort depended on wind conditions. During the studied period (2008–2013) the CPUE of 2009 was the only one lower than the CPUE of 2008, and the number of fishing grounds as well as their respective area have not increased. The species depth distribution reaches 60 m deep, which is much deeper than the depths divers can reach (about 20 m), however the highest abundance of O. trimaculatus occurs at less than 30 m depth. The fishery did not show signs of depletion likely due to the combination of target species depth distribution and fleet characteristics limiting fishers' operability. This provides a unique opportunity to constrain fishing effort and avoid overcapacity, for example by banning larger vessels from the fishery. © 2019 Elsevier Ltd JOUR info:eu-repo/semantics/openAccess http://creativecommons.org/licenses/by/2.5/ar http://hdl.handle.net/20.500.12110/paper_09645691_v173_n_p26_delaBarra
institution Universidad de Buenos Aires
institution_str I-28
repository_str R-134
collection Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA)
topic Fishers decision
Fishing effort
Making process
Ovalipes trimaculatus
Patagonia
Portunid fishery
San Matías Gulf
Decision making
Fishing vessels
Open access
Population distribution
Shellfish
Fishers decision
Fishing effort
Making process
Ovalipes trimaculatus
Patagonia
Fisheries
Decapoda (Crustacea)
Ovalipes trimaculatus
Portunidae
spellingShingle Fishers decision
Fishing effort
Making process
Ovalipes trimaculatus
Patagonia
Portunid fishery
San Matías Gulf
Decision making
Fishing vessels
Open access
Population distribution
Shellfish
Fishers decision
Fishing effort
Making process
Ovalipes trimaculatus
Patagonia
Fisheries
Decapoda (Crustacea)
Ovalipes trimaculatus
Portunidae
de la Barra, P.
Iribarne, O.
Narvarte, M.
Combining fishers' perceptions, landings and an independent survey to evaluate trends in a swimming crab data-poor artisanal fishery
topic_facet Fishers decision
Fishing effort
Making process
Ovalipes trimaculatus
Patagonia
Portunid fishery
San Matías Gulf
Decision making
Fishing vessels
Open access
Population distribution
Shellfish
Fishers decision
Fishing effort
Making process
Ovalipes trimaculatus
Patagonia
Fisheries
Decapoda (Crustacea)
Ovalipes trimaculatus
Portunidae
description The fishery for the swimming crab Ovalipes trimaculatus in the southwestern Atlantic started in 2007, with an average catch of 64.36 t⋅y −1 during the period between 2008 and 2013. The fishery is under an open access regime and market demand exceeds the catch which raises concern about its future. It is also data-poor, which prevents researchers from using traditional assessment methods. The factors that limit the fishing effort were identified by analyzing the fishing operation, the decision making process of the fishers and CPUE. Changes in catch composition through space and time, and the distribution of the population along a depth gradient were also studied. Wind, recent yield and the price of crab were perceived by skippers as relevant factors when deciding to go fishing, but there was no relationship between these variables and monthly fishing effort. However, daily fishing effort depended on wind conditions. During the studied period (2008–2013) the CPUE of 2009 was the only one lower than the CPUE of 2008, and the number of fishing grounds as well as their respective area have not increased. The species depth distribution reaches 60 m deep, which is much deeper than the depths divers can reach (about 20 m), however the highest abundance of O. trimaculatus occurs at less than 30 m depth. The fishery did not show signs of depletion likely due to the combination of target species depth distribution and fleet characteristics limiting fishers' operability. This provides a unique opportunity to constrain fishing effort and avoid overcapacity, for example by banning larger vessels from the fishery. © 2019 Elsevier Ltd
format JOUR
author de la Barra, P.
Iribarne, O.
Narvarte, M.
author_facet de la Barra, P.
Iribarne, O.
Narvarte, M.
author_sort de la Barra, P.
title Combining fishers' perceptions, landings and an independent survey to evaluate trends in a swimming crab data-poor artisanal fishery
title_short Combining fishers' perceptions, landings and an independent survey to evaluate trends in a swimming crab data-poor artisanal fishery
title_full Combining fishers' perceptions, landings and an independent survey to evaluate trends in a swimming crab data-poor artisanal fishery
title_fullStr Combining fishers' perceptions, landings and an independent survey to evaluate trends in a swimming crab data-poor artisanal fishery
title_full_unstemmed Combining fishers' perceptions, landings and an independent survey to evaluate trends in a swimming crab data-poor artisanal fishery
title_sort combining fishers' perceptions, landings and an independent survey to evaluate trends in a swimming crab data-poor artisanal fishery
url http://hdl.handle.net/20.500.12110/paper_09645691_v173_n_p26_delaBarra
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AT narvartem combiningfishersperceptionslandingsandanindependentsurveytoevaluatetrendsinaswimmingcrabdatapoorartisanalfishery
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