Artis Zoo in Amsterdam Announces Western Lowland Gorilla Relocations and New Arrivals
Amsterdam's Artis Zoo is preparing for a significant change within its Western lowland gorilla group. This summer, two female gorillas of reproductive age will be moving to other zoos to contribute to the broader European species conservation program. In turn, Artis will welcome two new female gorillas, reshaping the social dynamic of the group.
Supporting a Healthy Gorilla Population
The decision to relocate gorillas is part of a carefully managed effort to maintain a healthy and genetically robust population across European zoos. Tjerk ter Meulen, Artis's Animal & Plant Manager, explained that the current silverback, who is 30 years old, has already produced numerous offspring. To ensure genetic diversity, it's beneficial for him not to reproduce further. Therefore, the two departing females, who are still able to bear young, will move to new groups where their reproduction is encouraged. The two incoming females are currently on contraception, aligning with the conservation program's goal to manage specific genetic lines.
Artis Zoo plays a central role in coordinating the European species conservation program for Western lowland gorillas. This allows the institution to have a detailed overview of gorilla groups in various European zoos, enabling informed recommendations for optimal group structures, including relocations or contraception, to preserve a strong genetic future for the species.
Considerations in Animal Relocation
Relocations are not undertaken lightly, often involving a year-long process from recommendation to execution. Artis considers various factors when planning a move, including the gorillas' individual personalities, their existing roles within the group, and their overall well-being. The new accommodation's space, layout, and facilities are also carefully assessed. Furthermore, the wishes of the involved zoos are taken into account, and travel time is minimized, with nearby locations preferred. In this instance, the gorillas are moving to other zoos within the Netherlands.
Mimicking Natural Gorilla Social Structures
In their natural habitat, gorillas typically live in "harem" groups consisting of one silverback, multiple females, and their young. Young males eventually leave their birth group to form their own or join bachelor groups. While zoos cannot replicate this freedom entirely, relocations are used to simulate the natural dispersal and formation of groups. Artis has seen a number of males born recently, some of whom have already been relocated. The remaining five young males at Artis have been castrated to prevent them from maturing into silverbacks and causing unrest within the current group, allowing them to stay. The arrival of new females is expected to enhance the social balance and introduce a fresh dynamic, enriching the lives of all animals in the group.
Preparing for New Arrivals
Two years ago, Artis modified its gorilla enclosure to offer more space and better utilization of the facility. This ensures that when the two new female gorillas arrive this summer, they will have ample room to acclimate peacefully. Initially, they will be introduced to the silverback, and if they bond successfully, he will then guide their introduction to the rest of the gorilla family.
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