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Capturing elephants from the wild hinders their reproduction for over a decade

October 09, 2019

  • Scientists at the University of Sheffield have studied how capturing Asian elephants negatively affects their reproduction
  • The research found that capturing wild elephants not only negatively affects their reproduction immediately, but also any calves born to captured female elephants are less likely to survive
  • Millions of animals all over the world are removed from the wild and placed in captivity either for conservation, research or economic purposes
  • Researchers are hoping to address the need for animal welfare specialists, vets and ecologists to identify the effects of capture from the wild
Capturing elephants to keep in captivity not only hinders their reproduction immediately, but also has a negative effect on their calves, according to new research.

Scientists from the University of Sheffield have found long-lasting negative effects on the reproduction of Asian elephants captured from the wild and kept in captivity, in a joint study with the University of Turku and the Myanma Timber Enterprise (MTE).

Asian elephants caught from the wild were less likely to reproduce in their lifetime and started reproducing later, with these reductions lasting for over a decade. Researchers also found that this had a negative effect on the next generation, with calves born to captured mothers having reduced survival rates.

Approximately 16,000 Asian elephants are held in captivity in countries like Myanmar, India and Thailand, mainly used to drag logs in the timber industry or for tourism. To sustain these industries, elephants continue to be captured from the wild, but the long term impact of this for the elephants is less studied.

With so many wild animals kept in captivity, often to try and protect threatened species, understanding how captivity affects animals in the long term is important to improve conservation efforts.

John Jackson, lead author of the study and PhD Researcher at the University of Sheffield, said: "Conservation programmes that include captive breeding or captive management need to consider that taking individuals from the wild can influence animals for many years, and this may hinder future conservation efforts.

"The finding of long-lasting negative effects of capturing wild animals is important not only to sustain elephant populations in the future, but also for many other species that are taken from the wild."

Professor Virpi Lummaa, Associate of the University of Sheffield's Department of Animal and Plant Sciences from the University of Turku, said: "The key thing that we found here is that the negative effects of taking animals out of the wild can last for decades, and have knock on effects for generations in captivity.

"This is something conservationists have to consider when capturing animals, because even if we re-create good conditions in captivity, the animals may still struggle to reproduce."

Researchers also looked at the reasons why the calves of captured elephants suffered.

Mirkka Lahdenperä, PhD Researcher and co-lead of the study from the University of Turku, said: "We think that the stress imposed by the capture of elephants, which can negatively influence a whole host of processes in the animal such as the development of the foetus, body condition and social interactions, is the key reason we see such big reductions in reproduction."
-end-
The paper 'Capture from the wild has long-term costs on reproductive success in Asian elephants' is published in Proceedings of the Royal Society B, today (9 October 2019).

For further information please contact: Emma Griffiths, Media and PR Assistant, University of Sheffield, 0114 222 1034, e.l.griffiths@sheffield.ac.uk

Notes to editors

The University of Sheffield

With almost 29,000 of the brightest students from over 140 countries, learning alongside over 1,200 of the best academics from across the globe, the University of

Sheffield is one of the world's leading universities.

A member of the UK's prestigious Russell Group of leading research-led institutions, Sheffield offers world-class teaching and research excellence across a wide range of disciplines.

Unified by the power of discovery and understanding, staff and students at the university are committed to finding new ways to transform the world we live in.

Sheffield is the only university to feature in The Sunday Times 100 Best Not-For-Profit Organisations to Work For 2018 and for the last eight years has been ranked in the top five UK universities for Student Satisfaction by Times Higher Education.

Sheffield has six Nobel Prize winners among former staff and students and its alumni go on to hold positions of great responsibility and influence all over the world, making significant contributions in their chosen fields.

Global research partners and clients include Boeing, Rolls-Royce, Unilever, AstraZeneca, Glaxo SmithKline, Siemens and Airbus, as well as many UK and overseas government agencies and charitable foundations

University of Sheffield

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