Science in AfricaLogo Merck: Distributors of fine chemicals and apparatus. Enter here for more information.
November 2003

Feature

 


Elephants get a chilli reception

By Emma Duncan, WWF

It is well known that elephants are wary of bees, but fuming farmers tired of having their crops flattened by visiting elephants are now turning to the hot stuff - chilli - to keep them at bay.


Elephants. Picture from www.addoelephantpark.com Alfonso Namilepe surveys his field. The sugar cane stalks are flattened and half-eaten crops lie all around. This was his only livelihood. In one night, it's all gone.

"The armed conflict in Mozambique has finished, but now there's another war," he says, looking as devastated as his field.

Over 1400km away in Kenya's Transmara district, farmers come down from a rickety tree-top watch tower. They have worked in shifts through the night, guarding their fields from a well-organized raid.

But the raiders aren't humans - they're elephants.

To many, elephants are a mythical symbol of power and wisdom. To rural Africans, they can be a frightening reality.

The largest land mammal in the world, African elephants (Loxodonta africana) once roamed across most of the African continent, from the Mediterranean coast right down to the southern tip. Just 100 years ago, there may have been 5 million of them. Today there's no more than 500,000, living in fragmented populations in sub-Saharan regions.

The ivory trade was a major factor behind the African elephant's decline. But although poaching for meat and ivory is still a problem, the biggest threat to their continued survival is loss of habitat.

"With the rapid growth in human populations over the past 30 years, large areas of savannah and forest have been converted into agricultural land," explains Dr Noah Sitati, an elephant expert working for the Durrell Institute of Conservation and Ecology (DICE) in Kenya. "This forces the elephants into smaller and smaller areas."

This has led to increasing conflict between humans and elephants.

Kenya's Transmara district, located next to the world famous Masai Mara Game Reserve, is one conflict hotspot. The traditional inhabitants of the region, the nomadic, cattle-herding Maasai, have lived alongside elephants for centuries.

But over the last decade, large numbers of migrants have come to the area, attracted by the good farming conditions. The new farms have replaced more than half of the elephant's habitat. Many are right in the middle of established elephant paths. And maize, a staple crop, is too much for elephants to resist.

"Elephants can smell ripe maize from a distance of 10km," says Sitati. "They send a few ahead to see if the maize is ready before the full herd advances - making a beeline for tall ripe cobs. At harvest time they can easily trample and eat an entire year's crop in one night."

Crop raiding is the most common type of human-elephant conflict, occurring throughout Africa wherever elephants and farmers live near one another. The animals can also disrupt daily life. Children in the Transmara are often too frightened to walk to and from school, or have to leave school early because elephants are in the area. As a result, many children's education has suffered.

Sometimes the conflict ends in tragedy.

"Elephants have killed 200 people in Kenya and injured many more over the past seven years," says Dr PJ Stephenson from WWF's African Elephant Programme. "And northern Mozambique - where elephants destroy up to two-thirds of crops each year - lions, hyenas, and other predators have learned that a farmer guarding his field at night is easy prey. In one year, there were 52 hyena attacks in one small district, resulting in 28 deaths."

Elephants too are often killed. In Kenya, wildlife authorities shoot between 50 and 120 elephants each year in response to the animals harming people or their livelihoods. Some villages take the law in to their own hands and kill many more animals. The situation is the same wherever elephants come in to conflict with people.

Because the scale of the problem has only recently become so large, solutions have only just started being developed. One problem is that elephants are not just big, but smart - they can knock down regular fences, and figure out how to disable electric fences. They also quickly become habituated to loud noises made by farmers defending their fields.

Bring on the chilli

But it seems they have one weak spot - they don't like spicy food.

Chilli was shown to be an effective elephant deterrent in Zimbabwe in 2000. It's either grown around crops that elephants like to eat, used with engine oil to paint fiery rope barriers around fields, or burnt with elephant dung to produce a pungent smoke.

"It's a simple and effective solution, but it sometimes requires patience," says Peter Bechtel, who is working with WWF in Mozambique's Quirimbas National Park to help communities cope with elephants.

"For example, elephants were drinking at a water hole near one village every night and damaging fields on the way in and out. The community set up oiled ropes around the water hole. For three nights the smell of the chilli kept the elephants away, but the next night they broke the ropes and drank. The ropes were repaired but the elephants broke them again later. The village was about to give up ... but the elephants never came back. Twice was enough!"

In another village, a farmer decided to use chilli bombs to defend his cabbage patch, which elephants had destroyed before.

"When he heard the elephants approaching through the forest, the farmer burnt chilli bombs in four locations around his fields," says Bechtel. "The bull elephant came in first and encountered the smoke. He snorted and shook his head, then turned and ran off. The others followed, and all stayed away from the entire village for five weeks."

This had positive repercussions for the whole village. With no elephants around, mangoes were harvested for the first time in 10 years.

To further improve crop protection, WWF is advising villagers to plant their fields next to each other in blocks outside the forest to make them easier to defend. After receiving training, most villages have set up committees to oversee the crop protection work. They've also started growing chilli so they don't have to rely on project support.

A combination of chilli ropes and watchtowers has also proved very effective in Kenya's Transmara district.

"The watchtowers provide an 'early warning detection system'," explains Sitati. "If the farmers see or hear elephants approaching, they can usually scare them off using bright lights and noise. The chilli ropes form a second line of defence. We need to keep rotating our tactics, otherwise the elephants eventually learn to get around them."

WWF and DICE are also recommending that farmers grow crops that elephants don't like instead of maize, such as chilli and chrysanthemum, from which the natural insecticide pyrethrum is produced. Alternative income projects are also being promoted, such as honey production from the rich forests. The Maasai hope to develop tourism in the area too.

Changes to village planning could help as well. WWF's analysis revealed that many of those injured or killed by elephants in the Transmara district might have been filled with false courage or else slow to react - about one-third of the attacks occurred after the victims had left a bar situated near the maize fields. An easy if unpopular solution: close bars that are near fields.

Thanks to these combined measures, human-elephant conflict has been markedly reduced in Mozambique's Quirimbas National Park and Kenya's Transmara district. WWF plans to extend the work to other communities throughout Africa.

"The most important aspect of this work is that it helps local people deal with their every day problems," says Stephenson. "The success in reducing crop-raiding and increasing crop yields has made people more enthusiastic and supportive of conservation, and has demonstrated that people can live alongside wildlife while developing sustainable livelihoods. And that in turn should help ensure a long future for the elephants!"

It seems the hottest ideas really are the simplest.


More information:

WWF - www.panda.org 

* Emma Duncan is Managing Editor at WWF International.

Reproduced with permission from WWF. © 2002 WWF-- World Wide Fund For Nature. (Formerly World Wildlife Fund). All rights reserved.

Useful links:

Addo Elephant Park, South Africa. www.addoelephantpark.com 

Conserving Addo's elephants - the past, present and future of the population. More.

 

Science in Africa - Africa's First On-Line Science Magazine

Return to Home PageReturn to the TopYour FeedbackRegister with "Science in Africa" 

Copyright  2002, Science in Africa, Science magazine for Africa CC. All Rights Reserved

Terms and Conditions