What does this research mean for the field?

During a bycatch event in static nets, harbour porpoises engage in foraging behavior prior to entanglement, and surviving companions exhibit prolonged unusual communication behavior afterward. Novelty: ClaimNovelty.NOVEL_FINDING. Consensus alignment: ConsensusAlignment.ESTABLISHES_NEW_DIRECTION.

What question did this study set out to answer?

To determine the three-dimensional movement and acoustic behaviour of harbour porpoises immediately before and during a static net entanglement event.

August 27, 2026Royal Society Open ScienceOpen Access

First detailed insights into harbour porpoise behaviour during a bycatch event

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Authors

JMJamie Macaulay AKAllen Kingston ACAlexander Coram

Discussion

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Overview

Acoustic tracking study reveals foraging patterns and distress calls during net entanglement in harbour porpoises, highlighting key mechanisms for fishery bycatch mitigation.

Key Points

To determine the three-dimensional movement and acoustic behaviour of harbour porpoises immediately before and during a static net entanglement event.
Deployed a multi-hydrophone passive acoustic monitoring array to record the 3D positions and vocalizations of harbour porpoises (Phocoena phocoena).
Continuously tracked the fine-scale acoustics and physical interactions of an entangled porpoise and a nearby companion animal during a static net bycatch event.
Porpoises engaged in active foraging behaviour around the fishing gear immediately preceding the bycatch event.
The entangled porpoise lifted the static net vertically by approximately 7 m during the entanglement interaction.
The surviving companion porpoise remained in close proximity and exhibited unusual acoustic communication behaviour for several hours post-entanglement.

Cite This Study

Macaulay et al. (2026) studied this question.

synapsesocial.com/papers/6a8fea0d10c91c1e92622073 https://doi.org/10.1098/rsos.260565

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August 27, 2026Royal Society Open ScienceOpen Access

First detailed insights into harbour porpoise behaviour during a bycatch event

View Full Paper

Ask AI

Bookmark

Authors

JMJamie Macaulay AKAllen Kingston ACAlexander Coram

Discussion

Member takes

Overview

Acoustic tracking study reveals foraging patterns and distress calls during net entanglement in harbour porpoises, highlighting key mechanisms for fishery bycatch mitigation.

Key Points

To determine the three-dimensional movement and acoustic behaviour of harbour porpoises immediately before and during a static net entanglement event.
Deployed a multi-hydrophone passive acoustic monitoring array to record the 3D positions and vocalizations of harbour porpoises (Phocoena phocoena).
Continuously tracked the fine-scale acoustics and physical interactions of an entangled porpoise and a nearby companion animal during a static net bycatch event.
Porpoises engaged in active foraging behaviour around the fishing gear immediately preceding the bycatch event.
The entangled porpoise lifted the static net vertically by approximately 7 m during the entanglement interaction.
The surviving companion porpoise remained in close proximity and exhibited unusual acoustic communication behaviour for several hours post-entanglement.

Cite This Study

Macaulay et al. (2026) studied this question.

synapsesocial.com/papers/6a8fea0d10c91c1e92622073 https://doi.org/10.1098/rsos.260565

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