Assessing the economic impact caused by South American sea lions based on onboard check versus fishermen's perception: The two sides of the same coin

摘要: Abstract Conflicts with fisheries are the major threat to South American sea lions (Otaria flavescens). The understanding of gap between perceived economic impact by fishermen and actual on activity is crucial avoid retaliations species. This first study conducted in Brazil that simultaneously assessed these both aspects this complex issue. To assess revenue loss caused lions, we 58 onboard surveys 2011 2012, covering 161 fishing operations. socio-economic characteristics, perceptions temporal changes activity, interviewed one hundred fishermen. Onboard observations indicated interact boats throughout year. finding agreement reports most (69%) who believed interaction occurs every day species always present during operations (80%). On other hand, while revealed only 3% annual productivity was due predation (~US$ 1931.00 out total catch US$ 62,279.00), assigned a disproportionate lions: 88% respondents each lion consumed around 100 kg fish per interaction. misperception consequent conflict would decrease if were aware losses lions. mitigate conflict, an effective communication strategy open dialogue local marine Consulting Council recommended.