Marine species mortality in derelict fishing nets in Puget Sound, WA and the cost/benefits of derelict net removal

Kirsten Vk Gilardi, Daphne Carlson-Bremer, Jeffrey A. June, Kyle Antonelis, Ginny Broadhurst, Tom Cowan

Research output: Contribution to journalArticlepeer-review

33 Scopus citations

Abstract

Derelict fishing gear persists for decades and impacts marine species and underwater habitats. Agencies and organizations are removing significant amounts of derelict gear from marine waters in the United States. Using data collected from repeated survey dives on derelict gillnets in Puget Sound, Washington, we estimated the daily catch rate of a given derelict gillnet, and developed a model to predict expected total mortality caused by a given net based on entanglement data collected upon its removal. We also generated a cost:benefit ratio for derelict gear removal utilizing known true costs compared to known market values of the resources benefiting from derelict gear removal. For one study net, we calculated 4368 crab entangled during the impact lifetime of the net, at a loss of $19,656 of Dungeness crab to the commercial fishery, compared to $1358 in costs to remove a given gillnet, yielding a cost:benefit ratio of 1:14.5.

Original languageEnglish (US)
Pages (from-to)376-382
Number of pages7
JournalMarine Pollution Bulletin
Volume60
Issue number3
DOIs
StatePublished - 2010

Keywords

  • Cost/benefit
  • Ghost fishing
  • Mortality
  • Net
  • Puget Sound

ASJC Scopus subject areas

  • Aquatic Science
  • Oceanography
  • Pollution

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