Hlxe Newsmakers
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
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in the current issue of An
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imal Behaviour, shed light on how and why some animals cooperate to hunt for food, and how individual variatio
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n among chimpanzees contributes to collective predation.The study was led by Ian Gilby, a postdoctoral researcher in the Department of Anthropology in Harvard s 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 Zeju Edmond J. Safra Foundation supports ethics education with gift of $10 million
According to Economic Development in Africa 2008, published by the UN Conference on Trade and Development UNCTAD , the continent lost market share from 6 per cent of world exports in 1980 to about 3 per cent in 2007.Compared to other developin
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g regions, the increase in Africa s export value was driven prima
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rily by an external factor 鈥?rising export commodity prices 鈥?rather than increasing volumes. Between 1995 and 2006, both export volumes and prices grew at about 6 per cent per ye
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ar. During the same period, Asia s export volumes grew by 10 per cent per year while the prices increased by only 1 per cent per year, the report finds.The main obstacle faced by African countries, states the report, is their limited ability to produce the quantity and quality of goods required to meet the demands of the global market. They need such building blocks as well-trained workforces, reliable electricity supply, research and development skills, flexible investment and banking services, and effici