Foraging behavior of lactating South American sea lions (Otaria flavescens) and spatial–temporal resource overlap with the Uruguayan fisheries

Uruguayan Pinnipeds (Arctocephalus australis and Otaria flavescens): Evidence of Influenza Virus and Mycobacterium pinnipedii Infections

“…Maximum distance from the colony was 98.60 km ± 31.3 km. These results indicate that during the breeding season females forage in coastal and shallow continental shelf areas (Riet et al, 2009(Riet et al, , 2012. In autumn, foraging trips last 5 days (range: 1-14 days).…”

“…According to different authors, the sea lions' diet is mainly made up of coastal prey and some pelagic fishes: whitemouth croaker (Micropogonias furnieri), striped weakfish (Cynoscion guatucupa), Brazilian codling (Urophysis brasiliensis), cutlassfish (Trichiurus lepturus), mackerel (Trachurus lathami), Argentinean conger (Conger orbignyanus), carangid (Parona signata), two species of anchovies (Engraulis anchoita and Anchoa marinii), and Argentinean croaker (Umbrina canosai) (Franco-Trecu, 2010;Naya et al, 2000;Pinedo & Barros, 1983;Ponce de León & Pin, 2006;Riet et al, 2011Riet et al, , 2012Vaz Ferreira, 1981). As a consequence of interactions with sea lions, fishermen lost prey with high local commercial market value.…”

A Simulation-Based Study on Bayesian Estimators for the Skew Brownian Motion

“…Several studies on different sea lion species have demonstrated a fidelity to foraging areas among individuals (e.g., [17][18][19]), including SASL on the Atlantic coast ( [20,21]). Individual fidelity to foraging areas may allow animals to locate productive foraging grounds on successive trips, which could be a beneficial strategy as it confers the advantage of reducing overall travel costs ( [18,20]). Based on this, we hypothesized that the SASL will always travel to the same foraging areas, and thus, within the proposed model, θ should be close to −1.…”

Regional variability in diving physiology and behavior in a widely distributed air-breathing marine predator, the South American sea lionOtaria byronia

“…On the Falkland Islands, animals (n=10) were instrumented with MK9 time-depth recorders (Wildlife Computers) and Sirtrack Fastloc-GPS tags (Fastloc I, New Zealand) (Baylis et al, 2015a). In Uruguay, female sea lions (n=9) were instrumented with MK9 timedepth recorders (Wildlife Computers) and either a Fastloc-GPS tag (Sirtrack, New Zealand) or an Argos SPOT satellite tag (Wildlife Computers) (Riet-Sapriza et al, 2013). Specifics about instruments programming and resolution are provided in Table S2.…”

“…Although a few studies have examined the diving behavior of South American sea lions, they have been limited to its Atlantic range, from Uruguay (Riet-Sapriza et al, 2013;Rodriguez et al, 2013) to Argentinean Patagonia (Campagna et al, 2001;Werner and Campagna, 1995) and the Falkland/ Malvinas Islands (Baylis et al, 2015a;Thompson et al, 1998). Using time-depth recorders and satellite tags, these studies have found that sea lions are typically benthic foragers restricted to continental shelf waters (Campagna et al, , 2001Riet-Sapriza et al, 2013;Rodriguez et al, 2013;Thompson et al, 1998;Werner and Campagna, 1995). However, a recent study along the Pacific coast of South America showed that juvenile male sea lions forage pelagically and are not limited to the continental shelf (Hückstädt et al, 2014).…”