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Cetacean–fishery interactions in Galicia (NW Spain): results and management implications of a face-to-face interview survey of local fishers

Authors: Sabine Goetz; F.L. Read; M. Begoña Santos; Cristina Pita; Graham J. Pierce;

Cetacean–fishery interactions in Galicia (NW Spain): results and management implications of a face-to-face interview survey of local fishers

Abstract

Galicia (NW Spain) is an important fishing region with a high potential for cetacean–fishery interactions. Cetacean depredation on catch and damage to fishing gear can potentially lead to substantial economic loss for fishers, while cetacean bycatch raises conservation concerns. With the aim of gathering information on the types and scale of interactions and of suggesting possible management strategies, we conducted face-to-face interviews with fishers in local fishing harbours, in particular to identify specific problematic interactions and to quantify the level of economic loss and bycatch rates associated with these interactions. We found that cetacean–fishery interactions are frequent, although damage to catch and fishing gear by cetaceans was mostly reported as small. Nevertheless, substantial economic loss can result from common bottlenose dolphins (Tursiops truncatus) damaging coastal gillnets and from short-beaked common dolphins (Delphinus delphis) scattering fish in purse-seine fisheries. Cetacean bycatch mortality was reported to be highest for trawls and set gillnets, and probably exceeds sustainable levels for local common and bottlenose dolphin populations. Although interview data may be biased due to the perceptions of interviewees, and therefore should be interpreted with care, the methodology allowed us to cover multiple sites and fisheries within a reasonable time frame. Minimizing cetacean–fishery interactions requires the implementation of case-specific management strategies with the active participation of fishers. For set gillnet and purse-seine fisheries, the use of acoustic deterrent devices (pingers) may prevent cetaceans from approaching and getting trapped in the nets. For trawl fisheries, where bycatch appears to be particularly high at night in water depths of 100–300 m, possible solutions include the implementation of time/area closures and the relocation of some fishing effort to deeper waters

The study was funded by the EC projects MEXC-CT-2006-042337 and MEST-CT-2005-020501), the German Academic Exchange Service (DAAD), and the Fundação para a Ciência e a Tecnologia (FCT). MBS participation was part of the EU FP7 grant MYFISH (No. 289257) and the LOTOFPEL project (Plan Nacional de I + D + I, CTM 2010-16053)

14 pages, 5 figures, 3 tables

Peer reviewed

Country
Spain
Subjects by Vocabulary

Microsoft Academic Graph classification: Fishing Delphinus delphis Face to face interview biology.animal biology Bottlenose dolphin biology.organism_classification Active participation Fishery Bycatch Management implications Relocation

Keywords

cetacean–fishery interactions, Aquatic Science, Dolphin bycatch, Fisher participation, fishers' opinions, Oceanography, fisher participation, Centro Oceanográfico de Vigo, Pesquerías, Ecology, Evolution, Behavior and Systematics, Interview survey, Ecology, Cetacean–fishery interactions, Depredation, fishers’ opinions

  • BIP!
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    42
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
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    Top 10%
    impulse
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    Average
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    Usage byUsageCounts
    visibility views 18
    download downloads 71
  • citations
    This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    42
    popularity
    This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
    Top 10%
    influence
    This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
    Top 10%
    impulse
    This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
    Average
    Powered byBIP!BIP!
  • 18
    views
    71
    downloads
    Powered byOpenAIRE UsageCounts
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visibility
download
citations
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
views
OpenAIRE UsageCountsViews provided by UsageCounts
downloads
OpenAIRE UsageCountsDownloads provided by UsageCounts
42
Top 10%
Top 10%
Average
18
71
Green
bronze
Funded by
EC| MYFISH
Project
MYFISH
Maximising yield of fisheries while balancing ecosystem, economic and social concerns
  • Funder: European Commission (EC)
  • Project Code: 289257
  • Funding stream: FP7 | SP1 | KBBE
Related to Research communities
Sustainable Development Solutions Network - Greece
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