Navigation Links
In a last 'stronghold' for endangered chimpanzees, survey finds drastic decline
Date:10/13/2008

In a population survey of West African chimpanzees living in Cte d'Ivoire, researchers estimate that this endangered subspecies has dropped in numbers by a whopping 90 percent since the last survey was conducted 18 years ago. The few remaining chimpanzees are now highly fragmented, with only one viable population living in Ta National Park, according to a report in the October 14th issue of Current Biology, a Cell Press publication.

This alarming decline in a country that had been considered one of the final strongholds for West African chimps suggests that their status should be raised to critically endangered, said Genevive Campbell of the Max Planck Institute for Evolutionary Anthropology.

The booming human population in Cte d'Ivoire is probably responsible for the chimpanzees' demise.

"The human population in Cote d'Ivoire has increased nearly 50 percent over the last 18 years," said Christophe Boesch, also of the Max Planck Institute for Evolutionary Anthropology. "Since most threats to chimpanzee populations are derived from human activities such as hunting and deforestation, this has contributed to the dramatic decline in chimpanzee populations. Furthermore, the situation has deteriorated even more with the start of the civil war in 2002, since all surveillance ceased in the protected areas."

In the 1960s, the population of chimpanzees in Cte d'Ivoire was estimated at about 100,000 individuals. At the end of the 1980s, when the first and last nationwide chimpanzee survey was carried out, the total population of chimpanzees was estimated at 8,000 to 12,000 individuals. While that already represented a drastic decrease from the expected numbers, it nonetheless meant that Cte d'Ivoire harbored about half of the world's remaining West African chimpanzee populations.

In the new study, Campbell and Boesch's team conducted another nationwide survey, revealing a 90 percent drop in the chimpanzee nest encounter rate since the time of the last survey. That catastrophic decline in chimpanzees is especially strong in forest areas with low protection status, where the researchers saw no sign of the chimps. Even in protected areas like Marahou National Park, chimpanzees have clearly suffered since surveillance and external funding support were disrupted by civil unrest in 2002.

"Following my transect lines in Marahou National Park was similar to doing so in classified forests throughout the country, where I had to search long and hard to find any wild trees," Campbell said. "It was saddening that I only found one nest in this park, as during the previous survey they found 234 nests along the same transects. The one nest I did find was also in an area that had just been cleared for agriculture."

The only remaining refuge for the dwindling West African chimpanzees is Ta National Park. However, this population is also extremely threatened by poaching activities, Boesch said. External financial support in that park is scheduled to end in 2010, a move that will probably have disastrous consequences for the last vestiges of chimpanzees in Cte d'Ivoire.

"The comparisons between the results within national parks in Cte d'Ivoire and compared with the classified forest sends a very clear message: populations of wild chimpanzees living in protected areas with constant funding for conservation activities can survive even during period of rapid increase in human populations and political unrest," Boesch said. "We must appeal to the international conservation community to invest in sustainable funding of conservation activities in national parks with known importance for chimpanzee populations. Our results show that this works."


'/>"/>

Contact: Cathleen Genova
cgenova@cell.com
617-397-2802
Cell Press
Source:Eurekalert

Related biology news :

1. Cryopreservation techniques bring hopes for women cancer victims and endangered species
2. Recovery efforts not enough for critically endangered Asian vulture
3. Ecological Society of America criticizes administrations overhaul of the Endangered Species Act
4. Pollination habits of endangered Texas rice revealed to help preservation
5. First successful reverse vasectomy on endangered species performed at the National Zoo
6. New CITES quotas allow more caviar export, further jeopardize endangered sturgeon
7. Relocation of endangered Chinese turtle may save species
8. Great apes endangered by human viruses
9. Critically endangered porpoise is focus of new research report
10. Worlds most endangered gorilla fights back
11. Critically endangered Amur leopard captured
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:4/13/2017)... Calif. , April 13, 2017 UBM,s ... York will feature emerging and evolving technology ... Both Innovation Summits will run alongside the expo portion ... speaker sessions, panels and demonstrations focused on trending topics ... largest advanced design and manufacturing event will take place ...
(Date:4/11/2017)... 11, 2017 NXT-ID, Inc. (NASDAQ:   ... announces the appointment of independent Directors Mr. Robin D. ... Board of Directors, furthering the company,s corporate governance and expertise. ... Gino Pereira , ... forward to their guidance and benefiting from their considerable expertise ...
(Date:4/4/2017)... --  EyeLock LLC , a leader of iris-based identity ... and Trademark Office (USPTO) has issued U.S. Patent No. ... iris image with a face image acquired in sequence ... th issued patent. "The issuance ... multi-modal biometric capabilities that have recently come to market ...
Breaking Biology News(10 mins):
(Date:8/16/2017)... ... August 16, 2017 , ... Recent studies ... type. Many treatments for specific cancers, such as breast, prostate, or lung, target ... androgen deprivation therapy for advanced prostate cancer. , This therapy limits the ...
(Date:8/16/2017)... -- This year,s edition of the Inc. 5000 features a now-familiar name: BioPoint ... made the list for the third year in a row. Now in ... based on a set of quantitative metrics. In addition, BioPoint was also ... the Bay State . ... Inc. 5000 ...
(Date:8/15/2017)... CA (PRWEB) , ... August 15, 2017 , ... ... pioneering graphene biosensors that accelerate pharmaceutical and biotherapeutics development, announces the launch of ... number of steps needed to gain kinetic binding data for a wide range ...
(Date:8/15/2017)... ... 15, 2017 , ... The Conference Forum and The Trout ... a series of upcoming panels and events. The partnership culminates with the 4th ... in New York City. , “With our experience in producing the Immuno-Oncology 360° NYC ...
Breaking Biology Technology: