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Home NEWS Science News Science

Chimpanzees at the crossroads: adapt to living outside protected areas

Bioengineer by Bioengineer
May 22, 2019
in Science
Reading Time: 4 mins read
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Research carried out into the impact of changes to chimpanzee habitats found they have adapted to human developments — including learning how to cross roads safely — but their survival is still threatened

IMAGE

Credit: Tacugama Chimpanzee Sanctuary (TCS)/DICE, University of Kent

Research carried out into the impact of changes to chimpanzee habitats found they have adapted to human developments in a number of ways – including learning how to cross roads safely and the best times to visit human habitats – but their survival is still threatened.

A team of anthropologists from the University of Kent and universities in Spain, in collaboration with the Tacugama Chimpanzee Sanctuary in Sierra Leone, made their discoveries from hidden cameras during an eight-month study in the African country.

Although chimpanzees living in fragmented habitats cross roads to move from one area to another of their home range and may approach human settlements, any further road widening, tarmacking or expansion and urbanisation could significantly affect their distribution and abundance.

Consequently, the research team suggests care with infrastructure development, as well as developing agreements with farmers to allow strategic fallow areas to regenerate into community-managed forest refuges providing corridors for wildlife and vital natural resources and ecosystem services for both humans and wildlife.

The research found that chimpanzees do not avoid areas frequented by people, possibly due to human tolerance and low levels of hunting in the study area – but they did not visit areas humans use at midday when human activity was more prevalent.

Around settlements, farmers grow fruits that attract chimpanzees despite the risks of encounter with people. The cameras captured images of chimpanzees eating domesticated fruits like mangos and pineapples that were cultivated close to human settlements.

The research team used 24 infra-red digital camera traps deployed between 2015 and 2016 for a total of 8 months across 27 1.25×1.25 km grids in the Moyamba district in south-western Sierra Leone.

University of Kent expert in primate behaviour and one of the research team Dr Tatyana Humle said: ‘If we want to secure their long-term survival, it is crucial that successful protection measures should benefit people and chimpanzees alike. Conservation actions should focus on education and helping farmers to implement alternative agricultural methods to slash and burn farming and environmentally-friendly revenue generating activities to ensure coexistence between the two species.’

In a landscape heavily impacted by subsistence agriculture, with many swamps and minimal forest, the researchers found that chimpanzees can survive if habitat loss is gradual, key wild resources such as the native oil palm are abundant and if people are tolerant of their presence. However, chimpanzees in such landscapes tend to avoid roads, including untarmacked secondary roads, and prefer to range in close proximity to the swamps.

Approximately 60% of all world’s non-human primates are threatened with extinction and chimpanzees (Pan troglodytes verus) face serious threats in West Africa, including death from disease, habitat loss, poaching, and retaliation as a result of competition with people for resources.

West Africa has one of the most fragmented tropical forest landscapes in the world due to high levels of deforestation. Chimpanzees in the region are critically endangered with the majority living outside protected areas.

Factors influencing wild chimpanzee (Pan troglodytes verus) relative abundance in an agriculture-swamp matrix outside protected areas by Rosa Garriga, Ignasi Marco and Encarna Casas-Diaz, Facultat de Veterinària, Universitat Autònoma de Barcelona, Barcelona, Spain; Pelayo Acevedo, Instituto de Investigación en Recursos Cinegéticos, Ciudad Real, Spain; Bala Amarasekaran Tacugama Chimpanzee Sanctuary, Freetown, Sierra Leone; and Luna Cuadrado and Tatyana Humle, Durrell Institute of Conservation and Ecology, is published in Plos One.

###

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0215545

https://www.youtube.com/watch?v=Ui5MExaKmAE

For further information and interview or image requests contact Sandy Fleming at the University of Kent Press Office.

Tel: +44 (0)1227 823581

Email: [email protected]

News releases can also be found at http://www.kent.ac.uk/news

University of Kent on Twitter: http://twitter.com/UniKent

Established in 1965, the University of Kent – the UK’s European university – now has almost 20,000 students across campuses or study centres at Canterbury, Medway, Tonbridge, Brussels, Paris, Athens and Rome.

It was ranked 22nd in the Guardian University Guide 2018 and in June 2017 was awarded a gold rating, the highest, in the UK Government’s Teaching Excellence Framework (TEF).

In 2018 it was also ranked in the top 500 of Shanghai Ranking’s Academic Ranking of World Universities and 47th in the Times Higher Education’s (THE) new European Teaching Rankings.

Kent is ranked 17th in the UK for research intensity (REF 2014). It has world-leading research in all subjects and 97% of its research is deemed by the REF to be of international quality.

Along with the universities of East Anglia and Essex, Kent is a member of the Eastern Arc Research Consortium (http://www.kent.ac.uk/about/partnerships/eastern-arc.html).

The University is worth £0.7 billion to the economy of the south east and supports more than 7,800 jobs in the region. Student off-campus spend contributes £293.3m and 2,532 full-time-equivalent jobs to those totals.

Kent has received two Queen’s Anniversary prizes for Higher and Further Education.

Media Contact
Sandy Fleming
[email protected]

Related Journal Article

http://dx.doi.org/10.1371/journal.pone.0215545

Tags: AgricultureAnthropologyClimate ChangeDeveloping CountriesEcology/EnvironmentForestryNatureUrbanization
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