Muslims and Chiefs in West Africa. A study of Islam in the Middle Volta Basin in the precolonial period

1971 ◽  
Vol 13 (3/4) ◽  
pp. 239
Author(s):  
W. Hoenerbach ◽  
N. Levtzion
Keyword(s):  
West Africa ◽  
Volta Basin

scholarly journals Multi-model and multi-sensor estimations of evapotranspiration over the Volta Basin, West Africa

2014 ◽  
Vol 35 (10) ◽  
pp. 3132-3145 ◽  
Author(s):  
S. A. Andam-Akorful ◽  
V. G. Ferreira ◽  
J. L. Awange ◽  
E. Forootan ◽  
X. F. He
Keyword(s):  
West Africa ◽  
Volta Basin

Climate trends of temperature, precipitation and river discharge in the Volta Basin of West Africa

2007 ◽  
Vol 5 (1) ◽  
pp. 17-30 ◽  
Author(s):  
Rebekka Neumann ◽  
Gerlinde Jung ◽  
Patrick Laux ◽  
Harald Kunstmann
Keyword(s):  
West Africa ◽  
River Discharge ◽  
Climate Trends ◽  
Volta Basin

The Blackfly Dilemma

1977 ◽  
Vol 4 (4) ◽  
pp. 291-295 ◽  
Author(s):  
Emmanuel O. A. Asibey
Keyword(s):  
West Africa ◽  
Food Chain ◽  
Terminal Link ◽  
Human Knowledge ◽  
Volta Basin ◽  
Onchocerciasis Control ◽  
Blind Spots

The good intentions of specialists involved in the onchocerciasis control project in the Volta Basin of West Africa have not been questioned. It is, however, questioned whether there was not too great a haste to implement the spraying phase of the programme. There is apprehension that the food-chain with Man as terminal link will be contaminated, and that the project will increase the socio-economic as well as political problems of participating countries and yet fail to control the disease.In view of these considerations and of continuing ‘blind spots’ in human knowledge and especially of the problems involved, it is considered urgent that the spraying as it is now going on be modified or suspended until such time as the gaps in knowledge are reasonably closed.

scholarly journals Genetic diversity of Nile tilapia (Oreochromis niloticus) throughout West Africa

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
Curtis E. Lind ◽  
Seth K. Agyakwah ◽  
Felix Y. Attipoe ◽  
Christopher Nugent ◽  
Richard P. M. A. Crooijmans ◽  
...  
Keyword(s):  
Genetic Structure ◽  
West Africa ◽  
Genetic Resources ◽  
Oreochromis Niloticus ◽  
Nile Tilapia ◽  
Spatial Genetic Structure ◽  
River Basins ◽  
Fine Scale ◽  
Genetic Structuring ◽  
Volta Basin

AbstractNile tilapia (Oreochromis niloticus) is a globally significant aquaculture species rapidly gaining status as a farmed commodity. In West Africa, wild Nile tilapia genetic resources are abundant yet knowledge of fine-scale population structure and patterns of natural genetic variation are limited. Coinciding with this is a burgeoning growth in tilapia aquaculture in Ghana and other countries within the region underpinned by locally available genetic resources. Using 192 single nucleotide polymorphism (SNP) markers this study conducted a genetic survey of Nile tilapia throughout West Africa, sampling 23 wild populations across eight countries (Benin, Burkina Faso, Côte d’Ivoire, Ghana, Togo, Mali, Gambia and Senegal), representing the major catchments of the Volta, Niger, Senegal and Gambia River basins. A pattern of isolation-by-distance and significant spatial genetic structure was identified throughout West Africa (Global FST = 0.144), which largely corresponds to major river basins and, to a lesser extent, sub-basins. Two populations from the Gambia River (Kudang and Walekounda), one from the western Niger River (Lake Sélingué) and one from the upper Red Volta River (Kongoussi) showed markedly lower levels of diversity and high genetic differentiation compared to all other populations, suggesting genetically isolated populations occurring across the region. Genetic structure within the Volta Basin did not always follow the pattern expected for sub-river basins. This study identifies clear genetic structuring and differentiation amongst West African Nile tilapia populations, which concur with broad patterns found in previous studies. In addition, we provide new evidence for fine-scale genetic structuring within the Volta Basin and previously unidentified genetic differences of populations in Gambia. The 192 SNP marker suite used in this study is a useful tool for differentiating tilapia populations and we recommend incorporating this marker suite into future population screening of O. niloticus. Our results form the basis of a solid platform for future research on wild tilapia genetic resources in West Africa, and the identification of potentially valuable germplasm for use in ongoing breeding programs for aquaculture.

scholarly journals Modelling daily precipitation features in the Volta Basin of West Africa

2009 ◽  
Vol 29 (7) ◽  
pp. 937-954 ◽  
Author(s):  
P. Laux ◽  
S. Wagner ◽  
A. Wagner ◽  
J. Jacobeit ◽  
A. Bárdossy ◽  
...  
Keyword(s):  
West Africa ◽  
Daily Precipitation ◽  
Volta Basin

Recent climate trends for the Volta Basin in West Africa

Weather ◽  
2018 ◽  
Vol 74 (S1) ◽  
Author(s):  
Deborah Darko ◽  
Kwaku A. Adjei ◽  
Samuel N. Odai ◽  
Emmanuel Obuobie ◽  
Ruby Asmah ◽  
...  
Keyword(s):  
West Africa ◽  
Climate Trends ◽  
Volta Basin ◽  
Recent Climate
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