Garaï Marion E, Boult Victoria L, Zitzer Heike R
Elephant Reintegration Trust, Port Alfred 6170, South Africa.
Department of Meteorology, University of Reading, Reading RG6 7BE, UK.
Animals (Basel). 2023 Jan 30;13(3):483. doi: 10.3390/ani13030483.
African elephants () exhibit a long developmental period during which they acquire complex social and ecological knowledge through social networks. Central to this is that matriarchs and older individuals play an important role as repositories of information gained through experience. Anthropogenic interventions-including poaching, culling, translocation, and hunting-can disrupt elephants' social networks, with implications for individual fitness and potential long-term population viability. Here, we draw on a unique long-running, individual-based dataset to examine the impacts of translocation on a population of elephants in South Africa, taking into consideration demographic rates, social dynamics, and ecological decision-making. Specifically, we compared two translocated groups: a group of unrelated culling Orphans and a family herd. We found that the Orphan group experienced accelerated reproductive rates when compared with the family herd. The Orphan group also fissioned more frequently and for longer periods of time, suggesting lower cohesiveness, and were less decisive in their large-scale movement decisions. These results add to the growing body of literature on the downstream impacts of social disruption for elephants. Whilst the translocation of culling Orphans is no longer practised in South Africa, we encourage careful consideration of any elephant translocation and the resulting social disruption.
非洲象在漫长的发育阶段通过社交网络获取复杂的社会和生态知识。其中关键在于,象群中的女家长和年长个体作为经验信息的储存库发挥着重要作用。包括偷猎、捕杀、转移和狩猎在内的人为干预会破坏大象的社交网络,对个体健康和种群的长期生存能力产生影响。在此,我们利用一个长期独特的、基于个体的数据集,考虑到人口统计学比率、社会动态和生态决策,来研究转移对南非一群大象的影响。具体而言,我们比较了两个转移群体:一组无关的捕杀孤儿象群和一个家族象群。我们发现,与家族象群相比,孤儿象群的繁殖率加快。孤儿象群分裂也更频繁、持续时间更长,表明凝聚力较低,并且在大规模迁移决策中不够果断。这些结果进一步丰富了关于大象社会破坏下游影响的文献。虽然南非不再进行捕杀孤儿象的转移,但我们鼓励在进行任何大象转移及由此导致的社会破坏时要慎重考虑。