Navigation Links
Key 'impact hunters' catalyze hunting among male chimpanzees
Date:2/1/2008

CAMBRIDGE, Mass., Feb. 1, 2008 While hunting among chimpanzees is a group effort, key males, known as impact hunters are highly influential within the group. They are more likely to initiate a hunt, and hunts rarely occur in their absence, according to a new study. The findings, which appear in the current issue of Animal Behaviour, shed light on how and why some animals cooperate to hunt for food, and how individual variation among chimpanzees contributes to collective predation.

The study was led by Ian Gilby, a postdoctoral researcher in the Department of Anthropology in Harvards Faculty of Arts and Sciences, with Lynn Eberly of the University of Minnesota and Richard Wrangham, Ruth Moore Professor of Biological Anthropology at Harvard.

Chimpanzees live in communities of 40 to 150, within which fluid subgroups of changing size and composition form. While their diet is largely ripe fruit, chimpanzees also prey upon red colobus monkeys, which are agile and live in the trees. For this study, the researchers followed the hunting patterns of 11 adult males over more than a decade, among which two chimpanzees were identified as impact hunters. The chimpanzees that were studied live in Kanyawara, in Kibale National Park, Uganda.

Our findings show that while hunting among chimpanzees is a group process, these individual males have a strong effect on whether or not others decide to hunt, says Gilby. They have a strong catalytic effect on the decision to hunt. When a party of chimpanzees encounters a troop of red colobus, the impact hunters tend to be the first to hunt. By doing so, they dilute the preys defenses, thereby reducing the costs of hunting for other chimpanzees. Hunts rarely occurred in the absence of the impact males.

If all chimpanzees were equally skilled at hunting, the addition of any given chimpanzee to a party would increase the likelihood of hunting. However, this did not appear to be the case; it was th
'/>"/>

Contact: Amy Lavoie
amy_lavoie@harvard.edu
617-496-9982
Harvard University
Source:Eurekalert

Page: 1 2 3

Related biology news :

1. LSU, Yale team study agricultural impact on Mississippi River
2. Scientists call for urgent research into real impacts of invasive species
3. Will intensive forest practices impact water quality?
4. Smithsonian scientists highlight environmental impacts of biofuels
5. Global climate change: The impact of El Nio on Galpagos marine iguanas
6. Global climate change: The impact of El Niño on Galápagos marine iguanas
7. Ancient fish bones reveal impacts of global warming beneath the sea
8. New report explores tourisms impact on rural Alaska community
9. High-tech helmets reveal new information about the impact of hard hits to the head
10. Agriculture experts meet in Beijing to examine impacts of food prices and climate change on farmers
11. Nanotechs health, environment impacts worry scientists
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:7/11/2014)... division of the striatum is also involved in ... of substance P in the striatal marginal division ... his team, College of Biophotonics, South China Normal ... P receptor, neurokinin 1 was highly expressed in ... rats. Unilateral or bilateral injection of an antisense ...
(Date:7/11/2014)... 2014 Research and Markets has ... Market - Industry Analysis Size Share Growth Trends and ... http://photos.prnewswire.com/prnh/20130307/600769 The ... a need for high level security in both private ... such as username and passwords, tokens etc. are vulnerable ...
(Date:7/10/2014)... Santa Fe, Albuquerque, and other major cities in New ... with treated municipal wastewater rather than precious potable water ... than 40% of all golf courses receive treated effluent. ... , Additionally, golf courses and homeowners alike fertilize ... in fertilizer is nitrate. A New Mexico State University ...
Breaking Biology News(10 mins):International Biometrics Technology Market - Industry Analysis Size Share Growth Trends and Forecast to 2019 2'Tailored' water -- the latest in lawn care 2
... landscape of our planet and the elemental forces that shape ... being led by The University of Nottingham. The Earth ... University,s School of Geography, is a two-year project funded with ... will focus on technology that can be used for a ...
... from the University of Pennsylvania have linked the ... dark contrasts of the natural world, demonstrating the likelihood ... adapted to best capture the world around us. ... darkness are more numerous and cluster closer together than ...
... -- The explosion of portable communication devices that we ... Bluetooth hands-free units, and wireless Internet networks -- has ... variety of integrated circuits that create, process and receive ... Continuing demand for higher performance over a ...
Cached Biology News:Keeping a watch on the world 2Keeping a watch on the world 3The world is full of darkness, reflected in the physiology of the human retina, Penn researchers say 2The world is full of darkness, reflected in the physiology of the human retina, Penn researchers say 3
(Date:7/10/2014)... 10, 2014 Robert Harman, DVM, Founder and ... is proud to announce the relaunch of his highly informative ... new series called “ What are Stem Cells ?” ... and straightforward foundation in the basics of stem cell therapy ... the right type of treatment when considering regenerative medicine. , ...
(Date:7/10/2014)... Senior supply chain management executives from over ... challenges of “Reducing Cost, Lead Time, & Defects in ... Describing the partnership of the Bio Supply Management Alliance ... ( SCMI) of the University of San Diego ... Kroc Institute of Peace and Justice in San Diego, ...
(Date:7/10/2014)...  Kainos Capital, a firm specializing in acquiring and ... has acquired the Slim-Fast brand from Unilever. Unilever will ... the transaction were not disclosed. Slim-Fast is ... markets ready-to-drink shakes, powders, bars and snacks to retail ... in the United Kingdom and ...
(Date:7/10/2014)...   Ceres, Inc . (Nasdaq: CERE ... financial results for the three months ended May 31, ... Ceres reported that the company and its customers ... season in Brazil, which concluded in June, despite dry ... areas for part of the growing season. Yields of ...
Breaking Biology Technology:Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 2Robert Harman, DVM Talks About What Stem Cells are in His Latest Blog Series for Vet-Stem, Inc. 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 2Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 3Biotech & Biopharm Supply Chain Management Executives Launch BSMA in San Diego 4Kainos Capital Acquires Slim-Fast From Unilever 2Ceres Announces Fiscal Third Quarter 2014 Financial Results 2Ceres Announces Fiscal Third Quarter 2014 Financial Results 3Ceres Announces Fiscal Third Quarter 2014 Financial Results 4Ceres Announces Fiscal Third Quarter 2014 Financial Results 5Ceres Announces Fiscal Third Quarter 2014 Financial Results 6Ceres Announces Fiscal Third Quarter 2014 Financial Results 7Ceres Announces Fiscal Third Quarter 2014 Financial Results 8Ceres Announces Fiscal Third Quarter 2014 Financial Results 9
... , COLUMBIA, Md., Aug. 20 Martek Biosciences Corporation ... into a multi-year, sole-source supply agreement with Milk Powder Solutions, based ... as Milk Powder Solutions, exclusive supplier for all of its ARA ... Gold Cow brand name. , , "This new ...
... BEIJING, Aug. 20 /PRNewswire-Asia-FirstCall/ -- China Medical Technologies,Inc. ... China-based medical device,company that develops, manufactures and markets advanced ... unaudited financial results,for the fourth fiscal quarter ("4Q FY2008") ... first fiscal quarter ("1Q FY2009") ended June 30, 2009,before ...
... , BELLE MEAD, N.J., Aug. 19 ... Jersey will streamline and improve the quality of care for patients ... i ng.net ), a leader in healthcare technology. ... to oversee all aspects of practice management and electronic health record ...
Cached Biology Technology:Martek Signs Sole-Source Supply Agreement with Milk Powder Solutions 2Martek Signs Sole-Source Supply Agreement with Milk Powder Solutions 3China Medical Technologies to Announce Unaudited Financial Results for the Fourth Fiscal Quarter and Fiscal Year ended March 31, 2009 and the First Fiscal Quarter ended June 30, 2009 on September 1, 2009 2New Jersey Surgery Centers Pick Health Informatics Consulting to Implement Patient Electronic Health Record Systems 2