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Social dynamics and sexual segregation of Australian humpback dolphins (Sousa sahulensis) in Moreton Bay, Queensland
Marine Mammal Science ( IF 2.3 ) Pub Date : 2019-12-02 , DOI: 10.1111/mms.12657 Elizabeth R. Hawkins 1, 2 , Lara Pogson‐Manning 1, 2 , Christian Jaehnichen 1 , Justin J. Meager 3
Marine Mammal Science ( IF 2.3 ) Pub Date : 2019-12-02 , DOI: 10.1111/mms.12657 Elizabeth R. Hawkins 1, 2 , Lara Pogson‐Manning 1, 2 , Christian Jaehnichen 1 , Justin J. Meager 3
Affiliation
Understanding the social organization of coastal dolphins, particularly those that reside adjacent to major cities and urbanized regions, is important for understanding the vulnerability of populations to human impacts. We investigated the sexual segregation and social dynamics in a population of Australian humpback dolphins (Sousa sahulensis) inhabiting the near‐urban embayment of Moreton Bay, Queensland. Over 160 vessel‐based surveys, 148 adults were photographically identified. This included 116 assumed females and 32 assumed males. The population was sexually segregated (SSAS = 0.52, p < .001) and individuals preferred to associate with others of the same sex occupying the same spatial area (p < .025). Association indices between paired males were almost double those of females ( , SD = 0.04 and , SD = 0.02, respectively). However, females were more gregarious than males and maintained a larger network of associates based on preferred companionships. The social network was also modular with five clusters identified, and a limited number of individuals had a disproportionate influence on connectivity between clusters. This highly fragmented social network implies that the population may be vulnerable to social disruptions from human impacts.
中文翻译:
昆士兰州莫顿湾的澳大利亚座头海豚(Sousa sahulensis)的社会动态和性别隔离
了解沿海海豚的社会组织,特别是与主要城市和城市化地区相邻的沿海海豚的社会组织,对于了解人口对人类影响的脆弱性很重要。我们调查了居住在昆士兰州莫顿湾近郊的澳大利亚座头海豚(Sousa sahulensis)的性别隔离和社会动态。在超过160项基于船只的调查中,通过照相识别出148名成年人。其中包括116名假定女性和32名假定男性。人口处于性别隔离状态(SSAS = 0.52,p <.001),并且个人倾向于与同性的其他人交往并占据相同的空间区域(p <.025)。成年男性之间的关联指数几乎是女性的两倍(,SD = 0.04和,SD分别为0.02)。但是,女性比男性更合群,并根据偏好的伙伴关系维持着更大的同伴网络。社交网络也是模块化的,确定了五个集群,并且数量有限的个人对集群之间的连通性有不成比例的影响。这种高度分散的社会网络意味着人口可能易受人类影响的社会破坏。
更新日期:2019-12-02
中文翻译:
昆士兰州莫顿湾的澳大利亚座头海豚(Sousa sahulensis)的社会动态和性别隔离
了解沿海海豚的社会组织,特别是与主要城市和城市化地区相邻的沿海海豚的社会组织,对于了解人口对人类影响的脆弱性很重要。我们调查了居住在昆士兰州莫顿湾近郊的澳大利亚座头海豚(Sousa sahulensis)的性别隔离和社会动态。在超过160项基于船只的调查中,通过照相识别出148名成年人。其中包括116名假定女性和32名假定男性。人口处于性别隔离状态(SSAS = 0.52,p <.001),并且个人倾向于与同性的其他人交往并占据相同的空间区域(p <.025)。成年男性之间的关联指数几乎是女性的两倍(,SD = 0.04和,SD分别为0.02)。但是,女性比男性更合群,并根据偏好的伙伴关系维持着更大的同伴网络。社交网络也是模块化的,确定了五个集群,并且数量有限的个人对集群之间的连通性有不成比例的影响。这种高度分散的社会网络意味着人口可能易受人类影响的社会破坏。