Schakner Zachary A, Petelle Matthew B, Tennis Mathew J, Van der Leeuw Bjorn K, Stansell Robert T, Blumstein Daniel T
Department of Ecology and Evolutionary Biology, University of California, Los Angeles, CA 90095-1606, USA.
Department of Zoology and Entomology, University of the Free State, Phuthaditjhaba, South Africa.
R Soc Open Sci. 2017 May 17;4(5):160820. doi: 10.1098/rsos.160820. eCollection 2017 May.
Social relationships define an individual's position in its social network, which can influence the acquisition and spread of information and behavioural variants through the population. Thus, when nuisance behaviours spread through wildlife populations, identifying central individuals may provide valuable insights for problem-species management. We studied the effects of network position on California sea lion () discovery and foraging success at a novel foraging ground-the salmonids that aggregate at the Bonneville Dam tail-race, 235 km up the Columbia River. We found that an individual's centrality in their social network influenced discovery of the Bonneville Dam and whether they returned the next year. Foraging success once at the dam was independent of network position. Extensive lethal and non-lethal removal efforts have been implemented at Bonneville Dam and focused on reducing the number of individual sea lions at the dam. Since social relationships forged at the opening of the Columbia River influence both the discovery and return to the Bonneville Dam, efforts to increase salmon recovery may be enhanced by breaking apart social networks at the opening of the river.
社会关系决定了个体在其社交网络中的位置，这可能会影响信息和行为变体在种群中的获取与传播。因此，当有害行为在野生动物种群中传播时，识别核心个体可能为问题物种的管理提供有价值的见解。我们研究了网络位置对加利福尼亚海狮（）在一个新的觅食地——哥伦比亚河上游235公里处邦纳维尔大坝尾水区聚集的鲑鱼——发现和觅食成功的影响。我们发现，个体在其社交网络中的中心性影响了对邦纳维尔大坝的发现以及它们次年是否返回。一旦到达大坝，觅食成功率与网络位置无关。邦纳维尔大坝已经实施了广泛的致死和非致死清除措施，重点是减少大坝上个体海狮的数量。由于在哥伦比亚河河口形成的社会关系既影响对邦纳维尔大坝的发现又影响返回，通过在河口打破社交网络，可能会加强增加鲑鱼数量恢复的努力。
