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Mitigating slipping-related mortality from purse seine fisheries for small pelagic fish: case studies from European Atlantic waters Marcalo, A.; Breen, M.; Tenningen, M.; Onandia, I.; Arregi, L.; Gonçalves, J.M.S. (2019). Mitigating slipping-related mortality from purse seine fisheries for small pelagic fish: case studies from European Atlantic waters, in: Uhlmann, S.S. et al. The European Landing Obligation. Reducing Discards in Complex, Multi-Species and Multi-Jurisdictional Fisheries. pp. 297-318. https://dx.doi.org/10.1007/978-3-030-03308-8_15 In: Uhlmann, S.S. et al. (Ed.) (2019). The European Landing Obligation. Reducing Discards in Complex, Multi-Species and Multi-Jurisdictional Fisheries. Springer Nature: Switzerland. ISBN 978-3-030-03307-1. xix, 431 pp. https://dx.doi.org/10.1007/978-3-030-03308-8

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Beschikbaar in	Auteurs
VLIZ: Open access 323201 [ download pdf ]

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Trefwoorden

Pisces [WoRMS] Marien/Kust

Author keywords

Bycatch and slipping mitigation; Delayed mortality; Pelagic fish; Purse seine

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Auteurs		Top
Marcalo, A. Breen, M. Tenningen, M.	Onandia, I. Arregi, L. Gonçalves, J.M.S.

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Abstract

The release of unwanted catches (UWC) from purse seines, while the catch is still in the water, is known as “slipping”. Once thought to be a benign process, compared to discarding UWC overboard from the fishing vessel, it is now recognised that “slipping” can lead to significant mortality in the released fish if done inappropriately. In this chapter, we examine purse seining and slipping operations, and discuss what drives slipping and potential mitigation measures to reduce slipping mortality. We use three examples of purse seine fisheries for small pelagic species in the North-east Atlantic; from Norway, Portugal and Spain. The ideal solution (identifying and avoiding UWC before the net is set) requires the development of tools to enable fishers to better characterise target schools in terms of key selection criteria, e.g., with respect to species, individual size and catch biomass. Such tools are being developed, based primarily on hydro-acoustic technology. However, some UWC in purse seine catches are inevitable, and operational improvements in slipping practices have been shown to significantly reduce stress and mortality in the released UWC. We conclude with a discussion on the challenges currently facing the implementation of the European Union (EU) Landing Obligation with regards to minimising slipping related mortality.

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