Reconstructed catches and trends for mainland Portugal fisheries between 1938 and 2009: Implications for sustainability, domestic fish supply and imports

F. Leitão, V. Baptista, D. Zeller, K. Erzini

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Illegal, Unreported and Unregulated catches (IUU) are an important topic in fisheries, both from an economic and environmental perspective. Here, we estimated the likely total Portuguese mainland catches between 1938 and 2009 by estimating unreported catches (i.e., missing from official statistics) using a fishery-by-fishery approach. Landings increased from 1938, peaking between 1964 and 1972 (period when landings reached highest values across the time series), and declined thereafter, reaching values below the mean after 1993. Higher misreporting (unreported values above the mean) were recorded between 1956 and 1988. Overall, we estimated that over 25,013,000 t were caught between 1938 and 2009, which is 36% (range 28.2-41.5%) higher than the 16,121,510 t officially reported for the same time period, based on annual catches of around 123,000 t·year-1. Trawl fisheries accounted for the largest part of unreported catches, with 54% of total unreported catches, while accounting for 21% of total reported landings. The multi-gear fisheries accounted for the second largest percentage of estimated catches (25% of total unreported catches, 30% of reported landings). Purse seine fisheries accounted for 49% of total reported landings, but had the smallest proportion of unreported catches (19%). Unreported catches from the recreational/subsistence sector were lower, accounting for 1.5% of total unreported catches. Finfish accounted for 94% (115,000 t·year-1) of unreported catches, followed by cephalopods (2,400 t year-1) and crustaceans (1,800 t·year-1).

Original languageEnglish
Pages (from-to)33-50
Number of pages18
JournalFisheries Research
Volume155
DOIs
Publication statusPublished - 2014
Externally publishedYes

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imports
Portugal
import
fishery
fisheries
sustainability
fish
fisheries statistics
Cephalopoda
finfish
cephalopod
bycatch
time series analysis
subsistence
Crustacea
crustacean
trend
economics
time series

Cite this

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title = "Reconstructed catches and trends for mainland Portugal fisheries between 1938 and 2009: Implications for sustainability, domestic fish supply and imports",
abstract = "Illegal, Unreported and Unregulated catches (IUU) are an important topic in fisheries, both from an economic and environmental perspective. Here, we estimated the likely total Portuguese mainland catches between 1938 and 2009 by estimating unreported catches (i.e., missing from official statistics) using a fishery-by-fishery approach. Landings increased from 1938, peaking between 1964 and 1972 (period when landings reached highest values across the time series), and declined thereafter, reaching values below the mean after 1993. Higher misreporting (unreported values above the mean) were recorded between 1956 and 1988. Overall, we estimated that over 25,013,000 t were caught between 1938 and 2009, which is 36{\%} (range 28.2-41.5{\%}) higher than the 16,121,510 t officially reported for the same time period, based on annual catches of around 123,000 t·year-1. Trawl fisheries accounted for the largest part of unreported catches, with 54{\%} of total unreported catches, while accounting for 21{\%} of total reported landings. The multi-gear fisheries accounted for the second largest percentage of estimated catches (25{\%} of total unreported catches, 30{\%} of reported landings). Purse seine fisheries accounted for 49{\%} of total reported landings, but had the smallest proportion of unreported catches (19{\%}). Unreported catches from the recreational/subsistence sector were lower, accounting for 1.5{\%} of total unreported catches. Finfish accounted for 94{\%} (115,000 t·year-1) of unreported catches, followed by cephalopods (2,400 t year-1) and crustaceans (1,800 t·year-1).",
keywords = "Fisheries catch reconstruction, IUU, Portugal mainland, Unreported catches",
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Reconstructed catches and trends for mainland Portugal fisheries between 1938 and 2009 : Implications for sustainability, domestic fish supply and imports. / Leitão, F.; Baptista, V.; Zeller, D.; Erzini, K.

In: Fisheries Research, Vol. 155, 2014, p. 33-50.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Reconstructed catches and trends for mainland Portugal fisheries between 1938 and 2009

T2 - Implications for sustainability, domestic fish supply and imports

AU - Leitão, F.

AU - Baptista, V.

AU - Zeller, D.

AU - Erzini, K.

PY - 2014

Y1 - 2014

N2 - Illegal, Unreported and Unregulated catches (IUU) are an important topic in fisheries, both from an economic and environmental perspective. Here, we estimated the likely total Portuguese mainland catches between 1938 and 2009 by estimating unreported catches (i.e., missing from official statistics) using a fishery-by-fishery approach. Landings increased from 1938, peaking between 1964 and 1972 (period when landings reached highest values across the time series), and declined thereafter, reaching values below the mean after 1993. Higher misreporting (unreported values above the mean) were recorded between 1956 and 1988. Overall, we estimated that over 25,013,000 t were caught between 1938 and 2009, which is 36% (range 28.2-41.5%) higher than the 16,121,510 t officially reported for the same time period, based on annual catches of around 123,000 t·year-1. Trawl fisheries accounted for the largest part of unreported catches, with 54% of total unreported catches, while accounting for 21% of total reported landings. The multi-gear fisheries accounted for the second largest percentage of estimated catches (25% of total unreported catches, 30% of reported landings). Purse seine fisheries accounted for 49% of total reported landings, but had the smallest proportion of unreported catches (19%). Unreported catches from the recreational/subsistence sector were lower, accounting for 1.5% of total unreported catches. Finfish accounted for 94% (115,000 t·year-1) of unreported catches, followed by cephalopods (2,400 t year-1) and crustaceans (1,800 t·year-1).

AB - Illegal, Unreported and Unregulated catches (IUU) are an important topic in fisheries, both from an economic and environmental perspective. Here, we estimated the likely total Portuguese mainland catches between 1938 and 2009 by estimating unreported catches (i.e., missing from official statistics) using a fishery-by-fishery approach. Landings increased from 1938, peaking between 1964 and 1972 (period when landings reached highest values across the time series), and declined thereafter, reaching values below the mean after 1993. Higher misreporting (unreported values above the mean) were recorded between 1956 and 1988. Overall, we estimated that over 25,013,000 t were caught between 1938 and 2009, which is 36% (range 28.2-41.5%) higher than the 16,121,510 t officially reported for the same time period, based on annual catches of around 123,000 t·year-1. Trawl fisheries accounted for the largest part of unreported catches, with 54% of total unreported catches, while accounting for 21% of total reported landings. The multi-gear fisheries accounted for the second largest percentage of estimated catches (25% of total unreported catches, 30% of reported landings). Purse seine fisheries accounted for 49% of total reported landings, but had the smallest proportion of unreported catches (19%). Unreported catches from the recreational/subsistence sector were lower, accounting for 1.5% of total unreported catches. Finfish accounted for 94% (115,000 t·year-1) of unreported catches, followed by cephalopods (2,400 t year-1) and crustaceans (1,800 t·year-1).

KW - Fisheries catch reconstruction

KW - IUU

KW - Portugal mainland

KW - Unreported catches

UR - http://www.scopus.com/inward/record.url?scp=84896461187&partnerID=8YFLogxK

U2 - 10.1016/j.fishres.2014.02.012

DO - 10.1016/j.fishres.2014.02.012

M3 - Article

VL - 155

SP - 33

EP - 50

JO - Fisheries Research

JF - Fisheries Research

SN - 0165-7836

ER -