Ingestion of fishing items by South American sea lion in southern Brazil: Indicating a neglected problem

A rise in pinniped-fisheries interactions has been observed due to the global decline in fish populations primarily attributed to overfishing, and/or due to the recent population recovery of several pinniped species. Although many studies have quantified these interactions, a limited number delve into their behavioral aspects. We consulted 374 studies on pinniped-fisheries interactions from 1980 to 2020 and analyzed which of them addressed the interaction from a behavioral perspective. Additionally, we examined the role of learning in pinnipeds and their ability to capture prey from fishing gear. The stimulus-reward relationship in operational interactions was addressed in 51 (14%) studies, involving 10 (19%) of the world’s 54 pinniped species or subspecies. Depredation behavior (43%) and attack behavior (35%) were frequently reported during fishing interactions. Understanding associative and non-associative learning mechanisms has the potential to reduce economic losses from fishing activity, advance efficient mitigation measures to minimize conflicts, and establish pragmatic conservation priorities based on a better understanding of the behavioral aspects of these interactions. More research is needed to explore the effectiveness of deterrents in different species, improve methods of reducing habituation, and evaluate long-term behavioral effects, fostering effective strategies for minimizing conflicts and promoting coexistence between humans and pinnipeds.

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Ingestion of fishing items by South American sea lion in southern Brazil: Indicating a neglected problem

Cited by 3 publications

References 36 publications

Monitoring macroplastic ingestion by birds and marine mammals in northeastern Patagonia, Argentina

Monitoring macroplastic ingestion by birds and marine mammals in northeastern Patagonia, Argentina

Knowledge, attitudes and behavioural intentions of gillnet fishermen towards the South American sea lion in two marine protected areas in southern Brazil

Mitigation measures for pinniped-fisheries interactions based on knowledge of animal behavior

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