Interactions between South American sea lions Otaria flavescens (Shaw) and salmon farms in southern Chile

By M. Sepúlveda, Doris Oliva. 2005

85 citations recorded by the source corpus.

By means of surveys in 48 salmon farms in Chile, and the analysis of fish mortality in 23, the results showed that attacks by the South American sea lion, Otaria flavescens, were periodical at a daily and seasonal scale, and because of their natural nocturnal feeding behaviour, were more frequent at night and in fall–winter seasons. The attacks varied markedly between the farms studied. No relation was found between the intensity of attacks, the distance to the nearest colony of sea lions and the population in the colony. Differences found between farms could be because of the different protective devices used, namely anti-predator nets, acoustic harassment devices (AHDs) and fibreglass models of killer whales, and the way in which they were used. Of these devices, only the anti-predator net achieved a permanent reduction in sea lion attacks. Both AHDs and fibreglass killer whales were inefficient in the short term.

View Paper: https://www.semanticscholar.org/paper/8cdf856085ed590a37f2dba25ddab5bf8206472c

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Citations in the corpus

Attraction and repulsion of mobile wild organisms to finfish and shellfish aquaculture: a review (2018, background): “Seals and sea lions are also attracted to fish farms and have been recorded to be more abundant around them than similar areas without fish farms (Sepúlveda & Oliva 2005, Nelson et al. 2006, Robinson et al. 2008, Sanchez-Jerez et al. 2011, Northridge et al. 2013).”
Behavioral biology of marine mammal deterrents: A review and prospectus (2013, background): “Fiberglass models of killer whales placed around aquaculture pens (Sepulveda and Oliva, 2005) had a limited effect in deterring depredating pinnipeds.”