Exploring habitat credits to manage the benthic impact in a mixed fishery

J. Batsleer*, P. Marchal, S. Vaz, V. Vermard, Ad Rijnsdorp, J.J. Poos

*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

5 Citations (Scopus)

Abstract

The performance of a combined catch quota and habitat credit system was explored to manage the sustainable exploitation of a mix of demersal fish species and reduce the benthic impacts of bottom trawl fisheries using a dynamic state variable model approach. The model was parameterised for the Eastern English Channel demersal mixed fishery using otter trawls or
dredges. Target species differed in their association with habitat types. Restricting catch quota for plaice and cod had a limited effect on benthic impact, except when reduced to very low values, forcing the vessels to stay in port. Quota management had a minimal influence on fishing behaviour and hence resulted in a minimal reduction of benthic impact. Habitat credits may reduce the
benthic impacts of the trawl fisheries at a minimal loss of landings and revenue, as vessels are still able to reallocate their effort to less vulnerable fishing grounds, while allowing the fishery to catch their catch quota and maintain their revenue. Only if they are reduced to extremely low levels can habitat credits potentially constrain fishing activities to levels that prevent the fisheries from using up the catch quota for the target species.
Original languageEnglish
Pages (from-to)167-179
JournalMarine Ecology Progress Series
Volume586
DOIs
Publication statusPublished - 11 Jan 2018

Keywords

  • Fleet dynamics
  • Dynamic state variable modelling
  • TAC
  • Total allowable catch
  • Mixed fisheries
  • Eastern English Channel
  • Plaice
  • Cod

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