Closer to reality: Reconstructing total removals in mixed fisheries from Southern Europe

M. Coll, M. Carreras, M. J. Cornax, E. Massutí, E. Morote, X. Pastor, A. Quetglas, R. Sáez, Leonard da Silva, I. Sobrino, M. A. Torres, S. Tudela, S. Harper, D. Zeller, D. Pauly

Research output: Contribution to journalReview article

27 Citations (Scopus)

Abstract

Underestimation of catches is especially important in countries where fishing fleets are highly diversified, the enforcement of fishery management is low, data availability is poor, and there is high demand for fish products in local markets. This is the case for southern European and Mediterranean regions. Adapting a catch-reconstruction approach, we estimated the total removals of marine resources by Spain for the Spanish Mediterranean Sea and Gulf of Cadiz regions from 1950 to 2010. We collected available information from scientific publications, the grey literature and secondary sources of information to complement officially reported catch data. We assessed missing catch sectors as time-point estimates, used as anchor points of reliable data upon which we then estimated total catch using interpolation to fill in the periods for which quantitative data were missing. Unreported removals and discards represented important portions of total removals in the study area. They accounted for, on average, 43% of total removals between 1950s and 2010, and were composed of black market sales, subsistence fishing, artisanal fishing, recreational fishing and illegal catch, in addition to discarding. By the late 2000s, recreational fishing was the most important sector for unreported landings (~36%), followed by black market sales (~32%), subsistence fishing (~17%), unreported artisanal fishing (~12%) and illegal catch (~2%). The overall catch trend differed from the official trend highlighting that the depletion of marine resources in the region started earlier than previously observed. The catch composition changed with time, with a higher diversification of species in fish markets with time. These results indicate an earlier trend towards expansion of fisheries and depletion of marine resources.

Original languageEnglish
Pages (from-to)179-194
Number of pages16
JournalFisheries Research
Volume154
DOIs
Publication statusPublished - 2014
Externally publishedYes

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Southern European region
marine resources
sport fishing
fishing
fishery
fisheries
artisanal fishing
markets
marine resource
black market
sales
subsistence
fish products
information sources
fisheries management
Mediterranean region
Mediterranean Sea
catch composition
catch statistics
complement

Cite this

Coll, M., Carreras, M., Cornax, M. J., Massutí, E., Morote, E., Pastor, X., ... Pauly, D. (2014). Closer to reality: Reconstructing total removals in mixed fisheries from Southern Europe. Fisheries Research, 154, 179-194. https://doi.org/10.1016/j.fishres.2014.01.013
Coll, M. ; Carreras, M. ; Cornax, M. J. ; Massutí, E. ; Morote, E. ; Pastor, X. ; Quetglas, A. ; Sáez, R. ; da Silva, Leonard ; Sobrino, I. ; Torres, M. A. ; Tudela, S. ; Harper, S. ; Zeller, D. ; Pauly, D. / Closer to reality : Reconstructing total removals in mixed fisheries from Southern Europe. In: Fisheries Research. 2014 ; Vol. 154. pp. 179-194.
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abstract = "Underestimation of catches is especially important in countries where fishing fleets are highly diversified, the enforcement of fishery management is low, data availability is poor, and there is high demand for fish products in local markets. This is the case for southern European and Mediterranean regions. Adapting a catch-reconstruction approach, we estimated the total removals of marine resources by Spain for the Spanish Mediterranean Sea and Gulf of Cadiz regions from 1950 to 2010. We collected available information from scientific publications, the grey literature and secondary sources of information to complement officially reported catch data. We assessed missing catch sectors as time-point estimates, used as anchor points of reliable data upon which we then estimated total catch using interpolation to fill in the periods for which quantitative data were missing. Unreported removals and discards represented important portions of total removals in the study area. They accounted for, on average, 43{\%} of total removals between 1950s and 2010, and were composed of black market sales, subsistence fishing, artisanal fishing, recreational fishing and illegal catch, in addition to discarding. By the late 2000s, recreational fishing was the most important sector for unreported landings (~36{\%}), followed by black market sales (~32{\%}), subsistence fishing (~17{\%}), unreported artisanal fishing (~12{\%}) and illegal catch (~2{\%}). The overall catch trend differed from the official trend highlighting that the depletion of marine resources in the region started earlier than previously observed. The catch composition changed with time, with a higher diversification of species in fish markets with time. These results indicate an earlier trend towards expansion of fisheries and depletion of marine resources.",
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Coll, M, Carreras, M, Cornax, MJ, Massutí, E, Morote, E, Pastor, X, Quetglas, A, Sáez, R, da Silva, L, Sobrino, I, Torres, MA, Tudela, S, Harper, S, Zeller, D & Pauly, D 2014, 'Closer to reality: Reconstructing total removals in mixed fisheries from Southern Europe' Fisheries Research, vol. 154, pp. 179-194. https://doi.org/10.1016/j.fishres.2014.01.013

Closer to reality : Reconstructing total removals in mixed fisheries from Southern Europe. / Coll, M.; Carreras, M.; Cornax, M. J.; Massutí, E.; Morote, E.; Pastor, X.; Quetglas, A.; Sáez, R.; da Silva, Leonard; Sobrino, I.; Torres, M. A.; Tudela, S.; Harper, S.; Zeller, D.; Pauly, D.

In: Fisheries Research, Vol. 154, 2014, p. 179-194.

Research output: Contribution to journalReview article

TY - JOUR

T1 - Closer to reality

T2 - Reconstructing total removals in mixed fisheries from Southern Europe

AU - Coll, M.

AU - Carreras, M.

AU - Cornax, M. J.

AU - Massutí, E.

AU - Morote, E.

AU - Pastor, X.

AU - Quetglas, A.

AU - Sáez, R.

AU - da Silva, Leonard

AU - Sobrino, I.

AU - Torres, M. A.

AU - Tudela, S.

AU - Harper, S.

AU - Zeller, D.

AU - Pauly, D.

PY - 2014

Y1 - 2014

N2 - Underestimation of catches is especially important in countries where fishing fleets are highly diversified, the enforcement of fishery management is low, data availability is poor, and there is high demand for fish products in local markets. This is the case for southern European and Mediterranean regions. Adapting a catch-reconstruction approach, we estimated the total removals of marine resources by Spain for the Spanish Mediterranean Sea and Gulf of Cadiz regions from 1950 to 2010. We collected available information from scientific publications, the grey literature and secondary sources of information to complement officially reported catch data. We assessed missing catch sectors as time-point estimates, used as anchor points of reliable data upon which we then estimated total catch using interpolation to fill in the periods for which quantitative data were missing. Unreported removals and discards represented important portions of total removals in the study area. They accounted for, on average, 43% of total removals between 1950s and 2010, and were composed of black market sales, subsistence fishing, artisanal fishing, recreational fishing and illegal catch, in addition to discarding. By the late 2000s, recreational fishing was the most important sector for unreported landings (~36%), followed by black market sales (~32%), subsistence fishing (~17%), unreported artisanal fishing (~12%) and illegal catch (~2%). The overall catch trend differed from the official trend highlighting that the depletion of marine resources in the region started earlier than previously observed. The catch composition changed with time, with a higher diversification of species in fish markets with time. These results indicate an earlier trend towards expansion of fisheries and depletion of marine resources.

AB - Underestimation of catches is especially important in countries where fishing fleets are highly diversified, the enforcement of fishery management is low, data availability is poor, and there is high demand for fish products in local markets. This is the case for southern European and Mediterranean regions. Adapting a catch-reconstruction approach, we estimated the total removals of marine resources by Spain for the Spanish Mediterranean Sea and Gulf of Cadiz regions from 1950 to 2010. We collected available information from scientific publications, the grey literature and secondary sources of information to complement officially reported catch data. We assessed missing catch sectors as time-point estimates, used as anchor points of reliable data upon which we then estimated total catch using interpolation to fill in the periods for which quantitative data were missing. Unreported removals and discards represented important portions of total removals in the study area. They accounted for, on average, 43% of total removals between 1950s and 2010, and were composed of black market sales, subsistence fishing, artisanal fishing, recreational fishing and illegal catch, in addition to discarding. By the late 2000s, recreational fishing was the most important sector for unreported landings (~36%), followed by black market sales (~32%), subsistence fishing (~17%), unreported artisanal fishing (~12%) and illegal catch (~2%). The overall catch trend differed from the official trend highlighting that the depletion of marine resources in the region started earlier than previously observed. The catch composition changed with time, with a higher diversification of species in fish markets with time. These results indicate an earlier trend towards expansion of fisheries and depletion of marine resources.

KW - Catch reconstruction

KW - Discards

KW - Ecosystem change

KW - Fisheries catch

KW - Gulf of Cadiz

KW - IUU

KW - Mediterranean Sea

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JO - Fisheries Research

JF - Fisheries Research

SN - 0165-7836

ER -