Evidence of hawksbill turtle (Eretmochelys imbricata) depredation on fish caught in gillnets

Yusuf C. El-Khaled*, Carlos M. Duarte, Raquel S. Peixoto

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

Bycatch is a major global threat to marine megafauna and occurs in nearly all fishing fleets, including small-scale fisheries that use gillnets. Gillnets represent a threat to endangered air-breathing megafauna, who incidentally entangle in bottom-set gillnets and suffocate after being attracted by bait that is secured on fishing gear. We here provide the first evidence that hawksbill turtles feed on trapped fish in gillnets, suggesting that potential prey items trapped in gillnets may act as additional bait, attracting carnivorous sea turtles towards this threat. This overlooked depredating behaviour potentially explains and increases the likelihood of critically endangered hawksbill turtle bycatch in gillnet fisheries, calling for technological and management solutions.

Original languageEnglish (US)
Article number1180219
JournalFRONTIERS IN MARINE SCIENCE
Volume10
DOIs
StatePublished - 2023

Keywords

  • depredation
  • food source
  • incidental bycatch
  • marine megafauna
  • marine megafauna bycatch
  • sea turtle
  • small-scale fishery

ASJC Scopus subject areas

  • Oceanography
  • Global and Planetary Change
  • Aquatic Science
  • Water Science and Technology
  • Environmental Science (miscellaneous)
  • Ocean Engineering

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