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Fishery Discards: Factors Affecting Their Variability within a Demersal Trawl Fishery

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  • Jordan Feekings
  • Valerio Bartolino
  • Niels Madsen
  • Tom Catchpole

Abstract

Discards represent one of the most important issues within current commercial fishing. It occurs for a range of reasons and is influenced by an even more complex array of factors. We address this issue by examining the data collected within the Danish discard observer program and describe the factors that influence discarding within the Danish Kattegat demersal fleet over the period 1997 to 2008. Generalised additive models were used to assess how discards of the 3 main target species, Norway lobster, cod and plaice, and their subcomponents (under and over minimum landings size) are influenced by important factors and their potential relevance to management. Our results show that discards are influenced by a range of different factors that are different for each species and portion of discards. We argue that knowledge about the factors influential to discarding and their use in relation to potential mitigation measures are essential for future fisheries management strategies.

Suggested Citation

  • Jordan Feekings & Valerio Bartolino & Niels Madsen & Tom Catchpole, 2012. "Fishery Discards: Factors Affecting Their Variability within a Demersal Trawl Fishery," PLOS ONE, Public Library of Science, vol. 7(4), pages 1-9, April.
    • Handle: RePEc:plo:pone00:0036409
    DOI: 10.1371/journal.pone.0036409
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    1. Stephen C. Votier & Robert W. Furness & Stuart Bearhop & Jonathan E. Crane & Richard W. G. Caldow & Paulo Catry & Kenny Ensor & Keith C. Hamer & Anne V. Hudson & Ellen Kalmbach & Nicholas I. Klomp & S, 2004. "Changes in fisheries discard rates and seabird communities," Nature, Nature, vol. 427(6976), pages 727-730, February.
    2. Petter Johnsen, Jahn & Eliasen, Søren, 2011. "Solving complex fisheries management problems: What the EU can learn from the Nordic experiences of reduction of discards," Marine Policy, Elsevier, vol. 35(2), pages 130-139, March.
    3. Simon N. Wood, 2011. "Fast stable restricted maximum likelihood and marginal likelihood estimation of semiparametric generalized linear models," Journal of the Royal Statistical Society Series B, Royal Statistical Society, vol. 73(1), pages 3-36, January.
    4. Catchpole, T.L. & Frid, C.L.J. & Gray, T.S., 2005. "Discards in North Sea fisheries: causes, consequences and solutions," Marine Policy, Elsevier, vol. 29(5), pages 421-430, September.
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    1. Veiga, Pedro & Pita, Cristina & Rangel, Mafalda & Gonçalves, Jorge M.S. & Campos, Aida & Fernandes, Paul G. & Sala, Antonello & Virgili, Massimo & Lucchetti, Alessandro & Brčić, Jure & Villasante, Seb, 2016. "The EU landing obligation and European small-scale fisheries: What are the odds for success?," Marine Policy, Elsevier, vol. 64(C), pages 64-71.
    2. Sigurðardóttir, Sigríður & Stefánsdóttir, Elísabet Kemp & Condie, Harriet & Margeirsson, Sveinn & Catchpole, Thomas L. & Bellido, Jose M. & Eliasen, Søren Qvist & Goñi, Raquel & Madsen, Niels & Palial, 2015. "How can discards in European fisheries be mitigated? Strengths, weaknesses, opportunities and threats of potential mitigation methods," Marine Policy, Elsevier, vol. 51(C), pages 366-374.

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