Many animal vocal signals are given in a wide range of contexts which can sometimes have little in common. Yet, to respond adaptively, listeners must find ways to identify the cause of a signal, or at least rule out alternatives. Here, we investigate the nature of this process in putty-nosed monkeys, a forest primate. In this species, adult males have a very restricted repertoire of vocalizatio...

In recent years there has been much interest in investigating the social structure of group living animals using social network analysis. Many studies so far have focused on the social networks of adults, often excluding younger, immature group members. This potentially may lead to a biased view of group social structure as multiple recent studies have shown that younger group members can signi...

BACKGROUND: Non-invasive tool of community diagnosis for onchocercal endemicity needs to be identified and ascertained for their utility and effectivity in order to facilitate the control of onchocerciacis in sub-Saharan Africa OBJECTIVE: To determine the utility and effectiveness of the Wu-Jones Motion Sensitivity Screening Test (MSST) in detecting optic nerve diseases in onchocercal-endemic r...

V. Sommer and C. Ross (eds.), Primates of Gashaka, Developments in Primatology: Progress and Prospects 35, DOI 10.1007/978-1-4419-7403-7_14, © Springer Science+Business Media, LLC 2011 Abstract All great ape taxa are considered endangered due to a combination of habitat loss, hunting, disease outbreaks and human population increase. The bush-meat trade is thought to be the biggest threat to the...

Cancer disease has been on the increase recently in both developed and developing countries of the world resulting in 40 million deaths annually. Ethno-medicinal survey of indigenous herbal plants used in traditional medicine in the treatment of cancers was conducted in major communities in Bali, Gashaka and Sarduana Local Government Areas Taraba State Nigeria. Traditional medicine practitioner...

Cancer disease has been on the increase recently in both developed and developing countries of the world resulting in 40 million deaths annually. Ethno-medicinal survey of indigenous herbal plants used in traditional medicine in the treatment of cancers was conducted in major communities in Bali, Gashaka and Sarduana Local Government Areas Taraba State Nigeria. Traditional medicine practitioner...

Various populations of chimpanzees attack beehives to obtain honey, often with the help of wooden tools. However, little is known about how honey abundance in tropical habitats fluctuates with season and how chimpanzees respond to this. For a woodland-savannah habitat inhabited by the Nigeria-Cameroon chimpanzee subspecies, we analyzed monthly proportions of flowering trees and vines as a proxy...