L'homme et l'animal dans le bassin du lac Tchad

Une appréciation personnelle est donnée du recensement national du bétail qui a été effectué au Nigéria de 1989 jusqu'au milieu de l'année 1991. Ce recensement, dans lequel l'auteur était responsable des enquêtes au sol, a été conçu comme un exercice technique et statistique, mais il comportait de fortes implications politiques. Pour toutes les catégories de bétail, l'examen des effectifs et des systèmes de production a porté sur la totalité du pays. On résume les diverses méthodes utilisées et les principaux résultats chiffrés. Puis, les problèmes rencontrés pour obtenir des données numériques fiables sont évoqués, ainsi que les raisons de cette situation. Le rapport final a été mal accueilli par le gouvernement nigérien, en partie parce que ses résultats contredisaient les statistiques officielles utilisées dans la répartition des crédits. De ce fait, ce recensement n'as pas été utilisé dans l'élaboration de projets de développement pour l'élevage. (Résumé d'auteur

Reconstructing the origin and dispersal patterns of village chickens across East Africa: insights from autosomal markers

Unravelling the genetic history of any livestock species is central to understanding the origin, development and expansion of agricultural societies and economies. Domestic village chickens are widespread in Africa. Their close association with, and reliance on, humans for long-range dispersal makes the species an important biological marker in tracking cultural and trading contacts between human societies and civilizations across time. Archaezoological and linguistic evidence suggest a complex history of arrival and dispersion of the species on the continent, with mitochondrial DNA (mtDNA) D-loop analysis revealing the presence of five distinct haplogroups in East African village chickens. It supports the importance of the region in understanding the history of the species and indirectly of human interactions. Here, through a detailed analysis of 30 autosomal microsatellite markers genotyped in 657 village chickens from four East African countries (Kenya, Uganda, Ethiopia and Sudan), we identify three distinct autosomal gene pools (I, II and III). Gene pool I is predominantly found in Ethiopia and Sudan, while II and III occur in both Kenya and Uganda. A gradient of admixture for gene pools II and III between the Kenyan coast and Uganda's hinterland (P = 0.001) is observed, while gene pool I is clearly separated from the other two. We propose that these three gene pools represent genetic signatures of separate events in the history of the continent that relate to the arrival and dispersal of village chickens and humans across the region. Our results provide new insights on the history of chicken husbandry which has been shaped by terrestrial and maritime contacts between ancient and modern civilizations in Asia and East Africa

Trade and market in conflict development and conflict resolution in Nigeria: scoping study report to the UK department for International Development.

This study of trade related conflict and its resolution in Nigeria’s was prompted by the needs of policy makers concerned with improving market access for the poor. There is a lack of published material analysing links between trade/markets and conflict development/conflict resolution. The study is based on a literature review, a small number of interviews in Nigeria and UK and a one-day workshop:it was conceived as a pilot to identify areas for future research. The informality of Nigeria’s agricultural produce trade has the potential to promote both cooperation and conflict. The food marketing chains are complex networks extending across the country, and often involve diverse ethnic, religious and social groups. For the most part these linkages work extremely effectively, drawing on substantial inter-gender, inter-ethnic and inter-religious cooperation,often built up over generations.Nonetheless, there is potential for

An unreported African sign language in Northeast Nigeria

Language Use in Past and Presen

Social factors affecting seasonal variation in bovine trypanosomiasis on the Jos Plateau, Nigeria

BACKGROUND: African Animal Trypanosomiasis (AAT) is a widespread disease of livestock in Nigeria and presents a major constraint to rural economic development. The Jos Plateau was considered free from tsetse flies and the trypanosomes they transmit due to its high altitude and this trypanosomiasis free status attracted large numbers of cattle-keeping pastoralists to the area. The Jos Plateau now plays a major role in the national cattle industry in Nigeria, accommodating approximately 7% of the national herd, supporting 300,000 pastoralists and over one million cattle. During the past two decades tsetse flies have invaded the Jos Plateau and animal trypanosomiasis has become a significant problem for livestock keepers. Here we investigate the epidemiology of trypanosomiasis as a re-emerging disease on the Plateau, examining the social factors that influence prevalence and seasonal variation of bovine trypanosomiasis. METHODS: In 2008 a longitudinal two-stage cluster survey was undertaken on the Jos Plateau. Cattle were sampled in the dry, early wet and late wet seasons. Parasite identification was undertaken using species-specific polymerase chain reactions to determine the prevalence and distribution of bovine trypanosomiasis. Participatory rural appraisal was also conducted to determine knowledge, attitudes and practices concerning animal husbandry and disease control. RESULTS: Significant seasonal variation between the dry season and late wet season was recorded across the Jos Plateau, consistent with expected variation in tsetse populations. However, marked seasonal variations were also observed at village level to create 3 distinct groups: Group 1 in which 50% of villages followed the general pattern of low prevalence in the dry season and high prevalence in the wet season; Group 2 in which 16.7% of villages showed no seasonal variation and Group 3 in which 33.3% of villages showed greater disease prevalence in the dry season than in the wet season. CONCLUSIONS: There was high seasonal variation at the village level determined by management as well as climatic factors. The growing influence of management factors on the epidemiology of trypanosomiasis highlights the impact of recent changes in land use and natural resource competition on animal husbandry decisions in the extensive pastoral production system

East Benue-Congo: Nouns, pronouns, and verbs

This volume is the first in what hopefully will be a growing set of edited volumes and monographs concerning Niger-Congo comparative studies. This first volume addresses matters that are relevant to the entire East Benue-Congo family as well as the particular branches Kainji, Plateau, and Bantoid. In the case of Bantoid, the particular focus is on Grassfields and the Grassfields-Bantu borderland, though other Bantoid subgroups are referenced. The potential topics for comparative studies among these languages are numerous, but this volume is dedicated to presentations on nominal affixes, third person pronouns, and verbal extensions. A forthcoming volume will provide some results of reconstructions and lexicostatistics in Cross River, exploratory reconstructions in Southern Jukunoid, and reconstructions in Ekoid-Mbe and Mambiloid

East Benue-Congo: Nouns, pronouns, and verbs

This volume is the first in what hopefully will be a growing set of edited volumes and monographs concerning Niger-Congo comparative studies. This first volume addresses matters that are relevant to the entire East Benue-Congo family as well as the particular branches Kainji, Plateau, and Bantoid. In the case of Bantoid, the particular focus is on Grassfields and the Grassfields-Bantu borderland, though other Bantoid subgroups are referenced. The potential topics for comparative studies among these languages are numerous, but this volume is dedicated to presentations on nominal affixes, third person pronouns, and verbal extensions. A forthcoming volume will provide some results of reconstructions and lexicostatistics in Cross River, exploratory reconstructions in Southern Jukunoid, and reconstructions in Ekoid-Mbe and Mambiloid

East Benue-Congo: Nouns, pronouns, and verbs

This volume is the first in what hopefully will be a growing set of edited volumes and monographs concerning Niger-Congo comparative studies. This first volume addresses matters that are relevant to the entire East Benue-Congo family as well as the particular branches Kainji, Plateau, and Bantoid. In the case of Bantoid, the particular focus is on Grassfields and the Grassfields-Bantu borderland, though other Bantoid subgroups are referenced. The potential topics for comparative studies among these languages are numerous, but this volume is dedicated to presentations on nominal affixes, third person pronouns, and verbal extensions. A forthcoming volume will provide some results of reconstructions and lexicostatistics in Cross River, exploratory reconstructions in Southern Jukunoid, and reconstructions in Ekoid-Mbe and Mambiloid