Costa Rican Crocs Threatened by Bananas
By Hannah Osborne | September 19, 2013 11:18 PM EST
Crocodilians in Costa Rica are being threatened by bananas farmed in the Central American country.
Caiman, one of the most common species of crocodilian in Central America, have been found to have high levels of pesticide in their blood, which causes health problems in the predator.
The reason for these high levels is the increased demand for bananas across the globe.
Over £10bn is spent on bananas every year and to meet this demand, farmers in Costa Rica have turned to the intensive use of pesticide for better crop yield.
Pesticide use has doubled in Central America in the last 20 years and Costa Rica now ranks second in the world for the intensity of its use. Farmers also regularly use banned pesticides.
Paul Grant, from South Africa's Stellenbosch University, said: "Banana plantations are big business in Costa Rica, which exports an estimated 1.8 million tonnes per year; 10% of the global total.
"The climate of the country's North East is ideal for bananas; however, the Rio Suerte, which flows through this major banana producing area, drains into the Tortuguero Conservation Area."
Caiman living in Tortugero are highly adaptive and feed on fish, crustaceans and occasionally wild pigs.
Grant, lead author of the study, said: "Frequent heavy rains can wash pesticides from plantation areas, leading to contamination and the reapplication of sprays to the crops.
"Without adequate enforcement of regulations, dangerous practices such as aerial spraying close to streams or washing application equipment in rivers also contributes to contamination downstream."
Blood samples taken from 14 adult caiman were analysed for traces of pesticide. Those living closest to where pesticides drained into had the highest levels than those in remote locations.
Caiman with higher levels were less healthy than those living further afield, they discovered.
Researchers also found that seven of the nine pesticides identified were banned under the 2011 Stockholm Convention on Persistent Organic Pollutants.
"This suggests that either pesticides pose a health risk to caiman, or that pesticides harm the habitat and food supply of caiman, thereby reducing the health of this predator.
"Caiman and other aquatic species have been exposed to pesticides from upstream banana plantations, even in remote areas of a national wilderness area.
"Banana plantations may be economically important to Costa Rica; however their erosion of aquatic ecosystems highlights the need for a developed regulatory infrastructure and adequate enforcement."
To report problems or to leave feedback about this article, e-mail:
To contact the editor, e-mail:
Most Popular Slideshows
- Flight MH17 Attack: Russians Claim 'Putin A Terrorist,' Memorial at Dutch Embassy Overflows [PHOTOS]
- Typhoon Rammasun Claims 18 Lives in China, Incurs $4.32B Losses (PHOTOS)
- Ellen DeGeneres Caught Cheating with Mutual Friend Before Portia de Rossi’s Rehab – Reports [PHOTOS]
- Malaysia Airlines MH17: Vital Black Boxes Finally Land in Hands of Malaysian Authorities, Rebels Announce Ceasefire (PHOTOS/VIDEOS)
Join the Conversation
- Another Aviation Disaster: Taiwan Plane Crashes, Passengers Aboard Feared Dead [PHOTO]
- 'Dronies' to Become Latest Trend as Tourism New Zealand Buys Drone to Record Tourists' Videos
- MH370 Search Efforts Not Affected by MH17 Recovery; Australia Still Committed to Solving Mystery
- Former Destiny’s Child Star Farrah Franklin Arrested
- Asylum Seeker Women in Australia-Run Christmas Island Attempt Suicide in Desperation
- Samsung Galaxy Note 4 Apps Leak Online, Five Fresh Features to Expect from the Android Smartphone
- Moto 360 Price Speculations, Key Features, Strategic Release Date, Design: A Watch That is More Than Just Time
- Windows Phone 8.1 Update Rollout: 20 Nokia Lumia Phones Eligible and 13 New Features to be Added
- Three New Moto G Successors Spotted in FCC Document Dubbed Moto G2, Moto M and More --Reports
- iPad Air 2 Release Date Will Skip IGZO Panel; To Rollout with Super-Slim iPad Mini Air
- Upcoming iPad Mini 3 Could be 30% Thinner and Likely be Called iPad Mini Air; Apple Q3 Results Show 9% Decrease in iPad Sales
- Sony Xperia M2 vs. Moto G – Specifications, Features and Price Showdown