期刊
BEHAVIORAL ECOLOGY AND SOCIOBIOLOGY
卷 70, 期 1, 页码 111-122出版社
SPRINGER
DOI: 10.1007/s00265-015-2029-3
关键词
Social organization; Social dynamics; Killer whale; Orcinus orca; Foraging
资金
- Loro Parque Foundation
- CEPSA
- Ministerio de Medio Ambiente
- Fundacion Biodiversidad
- LIFE+ Indemares [LIFE07NAT/E/000732]
- LIFE Conservacion de Cetaceos y tortugas de Murcia y Andalucia [LIFE02NAT/E/8610]
- Plan Nacional I+D+I ECOCET of the Spanish Ministerio de Economia y Competitividad [CGL2011-25543]
- Spanish Ministry of Economy and Competitiveness, through the Severo Ochoa Programme for Centres of Excellence in R+D+I [SEV-2012-0262]
- Subprograma Juan de la Cierva
The primary prey of killer whales (Orcinus orca) in the Strait of Gibraltar is the bluefin tuna (Thunnus thynnus). All killer whales observed in this area hunt tuna by chasing individual fish until they become exhausted and can be overcome. However, a subset of pods also interact with a dropline tuna fishery which has developed since 1995. Here, we investigated the social structure within and among social units (pods). Our data suggested that social structure was shaped by maternal kinship, which appears to be a species-specific trait, but also by foraging behavior, which is less common at the intra-population level. At the start of the study, only one cohesive pod interacted with the fishery, which during the course of the study underwent fission into two socially differentiated pods. Social structure within these two fishery-interacting pods was more compact and homogenous with stronger associations between individuals than in the rest of the population. Three other pods were never seen interacting with the fishery, despite one of these pods being regularly sighted in the area of the fishery during the summer. Sociality can influence the spread of the novel foraging behaviors and may drive population fragmentation, which, in this example, is already a critically small community. Observations of social changes in relation to changes in foraging at the earliest stages of diversification in foraging behavior and social segregation may provide insights into the processes that ultimately result in the formation of socially isolated discrete ecotypes in killer whales.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据