期刊
APPLIED ANIMAL BEHAVIOUR SCIENCE
卷 234, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.applanim.2020.105175
关键词
Gorillas; Castration; Bachelor; Maturation; Social network analysis; Welfare
资金
- Antwerpen Zoo
- Apenheul
- Basel Zoo
- Barcelona Zoo
- Zooparc de Beauval and Beauval Nature
- Safaripark Beekse Bergen
- La Boissiere du Dore
- Dublin Zoo
- Bioparc Fuengirola
- Gaiazoo
- Erlebniz zoo Hannover
- Heidelberg Zoo
- Krefeld Zoo
- Longleat Safari Park
- Madrid Zoo
- Munchner Tierpark Hellabrunn
- Nuremberg Zoo
- Rostock Zoo
- Wilhelma Stuttgart
- Taipei Zoo
- Der Grune Zoo Wuppertal
- La Vall ee des Singes
- Zurich Zoo
This study evaluated socialization differences between captive juvenile and adolescent male gorillas, finding that castrated adolescent individuals showed more cohesiveness within familial groups. Intact adolescent males in bachelor groups were more isolated, but did not differ from their counterparts in familial groups in terms of positive behavior. These findings suggest that both bachelor groups and castration could be appropriate management strategies for gorilla populations in captivity.
In the European captive population of western lowland gorillas (Gorilla gorilla gorilla), the harem social structure and an even sex ratio at birth result in a surplus of males and consequent management difficulties. This study seeks to assess the socialization differences between captive juvenile and adolescent male gorillas according to their fertility status (intact vs castrated) in different social compositions (familial vs bachelor groups), and to evaluate the suitability of castration as a management tool for the EEP gorilla population. We carried out social network analyses (SNA) to assess the positive proximity pattern of behaviour in 93 western lowland gorillas aged from 0 to 45 years old and housed in 11 social units (seven familial and four bachelor groups). We compared the data recorded for the 27 juvenile and adolescent (i.e. subadult and blackback) males included in our sample size. Although no differences were revealed between the intact juveniles and the castrated juveniles living in familial groups, our results showed that castrated adolescent individuals showed more cohesiveness within their familial group than their intact conspecifics in terms of their activity budget. They also displayed a positive proximity pattern of behaviour with all group members, including adults (silverback and females). Despite being significantly more isolated, the intact adolescent males living in bachelor groups do not differ from their castrated and intact counterparts of the same age class living in familial groups in terms of their strength of positive behaviour when close to group conspecifics. This effect highlights the social benefits of male-male interactions within gorilla species. Our results may be evidence that both of the management strategies compared here, i.e. bachelor groups and castration, could be appropriate socio-behavioural enrichments during juvenility and adolescence. These findings also highlight the need to continue investigations until the study subjects reach adulthood to validate and/or improve these tools for the welfare-compliant management of gorilla male surplus in captivity.
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