HOME >> BIOLOGY >> NEWS
Tracking orangutans from the sky

From the hundreds of thousands of orangutans that once ranged throughout southeast Asia, only two orangutan species now inhabit just two countries: Indonesia and Malaysia. The Sumatran orangutan is listed as critically endangered, the Bornean, endangered. In a new study published in the open access journal PLoS Biology, Marc Ancrenaz and colleagues report an innovative method for reliably counting orangutan numbers from the sky, and estimate that the entire population in Sabah has dropped by 35% in the past 20 years.

Conservation efforts depend on having reliable data on population size, density, and distribution, but estimates of orangutan numbers in Sabah--which range from 2,000 to 20,000--are outdated. Orangutans are tough to spot directly, so researchers traditionally count the nests they sleep in at night, which is time-consuming, especially when faced with the hip-deep muck and steep slopes of the rainforest floor. Instead, Ancrenaz and colleagues have developed a survey method by which estimates of orangutan numbers can be made from helicopters. By comparing ground survey data, collected over two years, with aerial counts garnered in only 72 hours the authors calibrated and refined their aerial survey results and were able to directly assess the distribution and size of orangutan populations throughout the whole of Sabah (an area of 72,000 square kilometers).

The authors attribute the 35% decline in Sabah orangutan numbers primarily to habitat loss from agricultural development. While the authors acknowledge the density estimates could be more precise, their survey reveals crucial information on orangutan numbers and distribution, and their results suggest that orangutans may adapt better to degraded forests than previously thought--provided illegal hunting and agricultural conversion are controlled. Having reliable estimates of orangutan numbers is vital to conservation efforts. These aerial surveys will speed that work, and help su
'"/>


6-Dec-2004


Page: 1 2

Related biology news :

1. Gut check: Tracking the ecosystem within us
2. Tracking genes for self-pollination in arabidopsis
3. Tracking sperm whales and jumbo squid
4. Tracking diseases by bait, plane, insects and fowl
5. Tracking membranes of rupturing blood cells sheds light on malaria infection
6. Tracking a killer: Observing liver invasion by malarial parasites
7. Lessons from the orangutans: Upright walking may have begun in the trees
8. Study suggests evolutionary link between diet, brain size in orangutans
9. Genetic study shows humans have pushed orangutans to the brink of extinction

Post Your Comments:
*Name:
*Comment:
*Email:


(Date:11/2/2019)... ... ... Stay on top of current hot topics through free webinars presented by leading experts ... be sure to register today to save your place! Participate in the discussion and ... webinars: , CLINICAL OPERATIONS , November 14 – Leveraging Technology and Data to Establish ...
(Date:10/30/2019)... ... October 30, 2019 , ... Amberdata ... venture capital firms, including Fenbushi Capital, DF Capital, Rising Tide Fund, and HWVP. ... enabling Amberdata to further accelerate its position as the leading data provider of ...
(Date:10/27/2019)... ... October 26, 2019 , ... Since 2010, The HOTH ... program. By prioritizing the success of their clients, they’ve earned a place on the ... row, and they’ve won many additional awards and accolades along the way. , Now, ...
Breaking Biology News(10 mins):
(Date:11/6/2019)... ... November 06, 2019 , ... ... and dialogue, today announces its East/West CEO conference to be held ... , Kicking off the week of the J.P. Morgan Healthcare Conference ...
(Date:11/5/2019)... ... , ... Focal Healthcare , an innovator of image-guided ... 2.0 prostate fusion biopsy solution. By combining information from multiparametric MRI (mpMRI) with ... across Europe the ability to perform targeted transrectal and transperineal prostate biopsies. , ...
(Date:11/2/2019)... ... 2019 , ... A clinical trial usually involves many different ... principal investigators, supply chain managers, manufacturers, IRT, CRAs and so on. Lack of ... data, potentially leading to patient risk. , By having a single source of ...
(Date:11/2/2019)... YORK (PRWEB) , ... October 31, 2019 , ... ... been released by pharma artificial intelligence pioneer tellic. drug360 brings tellic’s expertise ... This new tool allows researchers to quickly uncover relationships between genes, diseases, variants, ...
Breaking Biology Technology:
Cached News: