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Analysing environmental and fishing effects on a short-lived species stock: the dynamics of the octopus Octopus vulgaris population in Senegalese waters
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: M Thiaw --- , Sénégal D Gascuel --- , France D Thiao --- , Sénégal OT Thiaw --- , Sénégal D Jouffre --- , SénégalShort-lived species are extremely dependent on the seasonal and interannual variability of environmental conditions, and determining their stock status is often difficult. This study investigates the effects of environmental variability and fishing pressure on the stock of octopus Octopus vulgaris... -
Quantitative post-release evaluation of biological control of Pistia stratiotes Linnaeus (Araceae) by the weevil Neohydronomus affinis Hustache (Coleoptera: Curculionidae) in Senegal
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: O Diop MP HillThe South American floating aquatic plant Pistia stratiotes (Araceae) was introduced into Senegal in the early 1990s and by 1994 had covered some 2 034 ha on Lake Guiers. The biological control agent Neohydronomus affinis (Coleoptera: Curculionidae) was released in... -
New evidence for a South Atlantic stock of humpback whales wintering on the Northwest African continental shelf
Item type: Journal Article • Journal: African Zoology • Authors: Koen Van Waerebeek --- COREWAM-Senegal, Musée de la Mer, Senegal Abdoulaye Djiba --- COREWAM-Senegal, Musée de la Mer, Senegal Jens-Otto Krakstad --- Institute of Marine Research, Norway Abdellahi Samba Ould Bilal --- Institut Mauritanien des Recherches Océanographiques et des Pêches (IMROP), Mauritania Idrissa L. Bamy --- Centre National des Sciences Halieutiques de Boussoura (CNSHB), Guinea Amadeu Almeida --- Centro de Investigaç ão Pesqueira Aplicada (CIPA), Guinea-Bissau Ebou Mass Mbye --- Fisheries Department, The GambiaSeventeen confirmed and four probable sightings of humpback whales, Megaptera novaeangliae, were documented from platform-of-opportunity Research Vessel (R/V) Dr. Fridtjof Nansen in a passing-mode visual survey of continental shelf waters between Conakry and Cap Vert Peninsula (Dakar), 21 October -5... -
A multimetric-index approach using fisheries data to assess fish assemblage structure in relation to salinity gradient in a tropical West African estuary
Item type: Journal Article • Journal: African Journal of Marine Science • Authors: J Kantoussan --- Université Gaston Berger de Saint-Louis, Senegal JM Ecoutin --- Institut de Recherche pour le Développement (IRD), France R Laë --- Institut de Recherche pour le Développement (IRD), France OT Thiaw --- Institut Universitaire de Pêche et d’Aquaculture (IUPA), Université Cheikh Anta Diop de Dakar, Senegal L Tito de Morais --- Institut de Recherche pour le Développement (IRD), FranceThis study examines the effects of increasing salinity on fish assemblage structure in the Casamance Estuary, Senegal, using a series of indices. The study data were derived from commercial fishery surveys conducted between April and July 2005. Analysis of within-trophic-group... -
Impact of the adoption of technological innovation on the credit acquisition of rice farmers in Senegal: A propensity score matching technique
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Philomena Chioma-Akalugo Ogwuike --- , Nigeria Clinton Obinna Ogwuike --- , Nigeria Aminou Arouna --- , Cote d’IvoireThis paper examines whether the adoption of the ASI thresher technology by rice farmers in the Senegal River Valley increases their access to credit and their creditworthiness through various pathways. Mainly, this study seeks to verify the argument that the... -
Innovation policy for economic development: The difficult but promising adequacy in the case of Senegal
Item type: Journal Article • Journal: African Journal of Science, Technology, Innovation and Development • Authors: Vanessa Casadella --- , France Sofiane Tahi --- , FranceWe use the National Innovation System (NIS) approach to analyze the performance of innovation policy of the sub-Saharan economy: the Senegal. The NIS approach makes it possible to understand how actors create and disseminate new knowledge, in a context of... -
Genetic and morphological variation of Woodland Kingfisher Halcyon senegalensis reveals cryptic mitochondrial lineages and patterns of mitochondrial–nuclear discordance
Item type: Journal Article • Journal: Ostrich: Journal of African Ornithology • Authors: Monica Mwale --- South African National Biodiversity Institute (SANBI), South Africa Desiré L Dalton --- South African National Biodiversity Institute (SANBI), South Africa Anna S Kropff --- South African National Biodiversity Institute (SANBI), South Africa Kim Labuschagne --- South African National Biodiversity Institute (SANBI), South Africa Isa-Rita Russo --- Cardiff University, United Kingdom Samuel T Osinubi --- University of Cape Town, South AfricaThe Woodland Kingfisher Halcyon senegalensis is widely distributed throughout sub-Saharan Africa and occupies a wide variety of woodland and savannah habitat. Thus far, three subspecies have been described based on morphological variation. In the present study, using western, eastern and... -
Molluscicidal effects of Persicaria senegalensis on terrestrial snails Cornu aspersum in South Africa
Item type: Journal Article • Journal: African Journal of Aquatic Science • Authors: MC Mathole --- Sefako Makgatho Health Sciences University, South Africa PH King --- Sefako Makgatho Health Sciences University, South AfricaCornu aspersum is an invasive terrestrial snail pest of the family Helicidae. In South Africa, where the snail causes significant crop losses in viticulture areas, synthetic molluscicides are used to control them. However, the latter negatively affects both those who...