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5 results on '"Koné, V. (collab.)"'

1. Large scale mechanisms associated with heat wave occurrences in Senegal [résumé de poster]

Author

Sambou, Marie-Jeanne, Janicot, Serge, Badiane, Daouda, Gaye, Amadou Thierno, Dieng, Abdou Lahat, HORIZON, IRD, Brehmer, Patrice (ed.), Diogoul, N. (collab.), Fock, H. (collab.), Mbaye, A. (collab.), Sall. M. (collab.), Mayif, M. (collab.), Fall. A. (collab.), Monteiro, I. (collab.), Kouassi, A.M. (collab.), Silva, O. (collab.), Brochier, Timothée (collab.), Koné, V. (collab.), Sidibe, M. (collab.), Diadhou, H. (collab.), Zenk, C. (collab.), Gorgues, Thomas (collab.), Ferreira Santos, C. (collab.), Bamy, I.L. (collab.), Barry, I. (collab.), Vareilles, M. de (collab.), Schmidt, J. (collab.), Ekau, W. (collab.), Keenlyside, N. (collab.), Nascimento, J.M. (collab.), Ramos, V. M. (collab.), Sow, B.A. (collab.), Laboratoire d'Océanographie et du Climat : Expérimentations et Approches Numériques (LOCEAN), Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-École normale supérieure - Paris (ENS Paris), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)-Institut de Recherche pour le Développement (IRD)-Muséum national d'Histoire naturelle (MNHN)-Centre National de la Recherche Scientifique (CNRS)-Sorbonne Université (SU), Muséum national d'Histoire naturelle (MNHN)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Institut Pierre-Simon-Laplace (IPSL (FR_636)), École normale supérieure - Paris (ENS-PSL), Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut national des sciences de l'Univers (INSU - CNRS)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)-École normale supérieure - Paris (ENS-PSL), and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université de Versailles Saint-Quentin-en-Yvelines (UVSQ)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-École polytechnique (X)-Centre National d'Études Spatiales [Toulouse] (CNES)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)

Subjects
[SDU] Sciences of the Universe [physics], SENEGAL, [SDU.STU.CL] Sciences of the Universe [physics]/Earth Sciences/Climatology, AFRIQUE DE L'OUEST, [SDU]Sciences of the Universe [physics], [SDU.STU.CL]Sciences of the Universe [physics]/Earth Sciences/Climatology, SAHEL, [SDU.STU.HY] Sciences of the Universe [physics]/Earth Sciences/Hydrology, [SDU.STU.HY]Sciences of the Universe [physics]/Earth Sciences/Hydrology, ATLANTIQUE
Abstract

ICAWA : International Conference AWA, Lanzarote, ESP, 17-/04/2018 - 20/04/2018; The coastal location of the Senegal induces specific heat wave (HW) events. HWs are defined as daily temperature (daily maximum or minimum temperature, or mean apparent temperature) higher than the 95th moving percentile during at least three consecutive days over the boreal spring period (Mars-April-May, 1979-2014). A hierarchical classification enables to define three homogeneous regions in terms of HW occurrences over Senegal (Zone #1, #2 and #3, from West to East). In order to study how atmospheric circulation is linked to these HW occurrences, composites of anomaly fields of ERA-Interim reanalysis have been computed using as reference date the starting day of each HW detected in GSOD (Global Summary of the Day) observations database. Results show that two patterns control the occurrence of HWs: regional-scale positive pressure anomalies centred around 35°N-10°W, and more local negative anomalies around 20°N-15°W. This structure leads to enhanced north-easterly winds advecting higher temperatures and moister air over the three zones of Senegal, and lower temperatures and drier air over the central Sahel. The intensity of this relationship is the largest for Zone #1, intermediate for #2 and the weakest for #3. The increased moisture signal over Senegal is highest for the composites associated with minimum and apparent temperature. Indices linked to this structure can be used to evaluate the predictability of such HW events.

Published
2019

2. Climate change and seasonality of small pelagics : impacts on their value chain in Senegal [résumé]

Author

Mbaye, A., Aliou Ba, Schmidt, J., Ngom, F., Thiaw, M., Patrice BREHMER, Abdoulaye Sarré, Thiao, D., HORIZON, IRD, Brehmer, Patrice, Institut Sénégalais de Recherches Agricoles [Dakar] (ISRA), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD), Christian-Albrechts-Universität zu Kiel (CAU), Brehmer, Patrice (ed.), Diogoul, N. (collab.), Zenk, C. (collab.), Vareilles, M. de (collab.), Keenlyside, N. (collab.), Nascimento, J.M. (collab.), Ramos, V. M. (collab.), Sow, B.A. (collab.), Fock, H. (collab.), Schmidt, J. (collab.), Ekau, W. (collab.), Mbaye, A. (collab.), Fall. A. (collab.), Monteiro, I. (collab.), Kouassi, A.M. (collab.), Silva, O. (collab.), Brochier, Timothée (collab.), Sall. M. (collab.), Mayif, M. (collab.), Koné, V. (collab.), Gorgues, Thomas (collab.), Ferreira Santos, C. (collab.), Bamy, I.L. (collab.), Barry, I. (collab.), Sidibe, M. (collab.), and Diadhou, H. (collab.)

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDE.BE] Environmental Sciences/Biodiversity and Ecology, SENEGAL, [SDE.MCG] Environmental Sciences/Global Changes, AFRIQUE DE L'OUEST, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, [SDE.MCG]Environmental Sciences/Global Changes, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, ATLANTIQUE
Abstract

ICAWA : International Conference AWA, Lanzarote, ESP, 17-/04/2018 - 20/04/2018; Factors influencing landed prices and those of processed products (fish and processed) are mainly landed quantities and product quality. The latter are in turn influenced by the seasonality of sardinella conditioned by the temperature of the water. It is usually in cooroon periods (April to June) that sardinella landings are more important and it is at this time also that the prices of fresh fish and processed products are the lowest. On the other hand sardinella is rare in lolli most often (October to December) and it is at this period also that the prices are generally higher. Nevertheless, depending on whether one is on the Petite Côte or on the Grande Côte, fishermen's appreciations of the periods of abundance of sardinellas differ. However, from the analysis of fishermen's knowledge on sardinella migration and bioecological models, it appears that sardinella are present on Senegalese coasts during periods of low temperature. As the cold water periods are later and shorter, the sardinella will be increasingly rare on the coast in Senegal, its higher price, accessibility is more difficult and consequently the animal protein deficit of the populations more accentuated.

Published
2019

3. International conference ICAWA 2017 and 2018 : extended book of abstract : the AWA project : ecosystem approach to the management of fisheries and the marine environment in West African waters

Author

Schmidt, J., Lancker, K., Hoffmann, J., Ba, Aliou, Fricke, L., Brehmer, Patrice (ed.), Diogoul, N. (collab.), Zenk, C. (collab.), Vareilles, M. de (collab.), Keenlyside, N. (collab.), Nascimento, J.M. (collab.), Ramos, V. M. (collab.), Sow, B.A. (collab.), Fock, H. (collab.), Schmidt, J. (collab.), Ekau, W. (collab.), Mbaye, A. (collab.), Fall. A. (collab.), Monteiro, I. (collab.), Kouassi, A.M. (collab.), Silva, O. (collab.), Brochier, Timothée (collab.), Sall. M. (collab.), Mayif, M. (collab.), Koné, V. (collab.), Gorgues, Thomas (collab.), Ferreira Santos, C. (collab.), Bamy, I.L. (collab.), Barry, I. (collab.), Sidibe, M. (collab.), Diadhou, H. (collab.), Institut Sénégalais de Recherches Agricoles [Dakar] (ISRA), and HORIZON, IRD

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDE.MCG] Environmental Sciences/Global Changes, SENEGAL, AFRIQUE DE L'OUEST, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, [SDE.MCG]Environmental Sciences/Global Changes, CAP VERT, ATLANTIQUE
Abstract

ICAWA : International Conference AWA, Mindelo, CPV, 13-/11/2017 - 17/11/2017; Artisanal fisheries still play a large role in many economics, especially in developing countries. These fishers and the coastal communities in general, face various risks in their everyday life including uncertainty about the success of fishing, uncertain prices for fish and uncertain costs for inputs such as fuel, and many more. In addition, foreign fleets, changing world markets and other global factors including climate change in particular can put additional pressures on top of this. We have used field surveys and economic experiments among fishing communities to assess how fisher perceive these risks and how they cope with them. The surveys were carried out in Senegal and Cape Verde, with 691 and 671 valid interviews, respectively. In this presentation, we will provide insights into some parts of our results including the general situation of the fisheries and fishers, climate change perceptions, and on coping mechanisms.

Published
2019

4. International conference ICAWA 2017 and 2018 : extended book of abstract : the AWA project : ecosystem approach to the management of fisheries and the marine environment in West African waters

Author

Marie Bonnin, HORIZON, IRD, Brehmer, Patrice (ed.), Diogoul, N. (collab.), Mayif, M. (collab.), Koné, V. (collab.), Zenk, C. (collab.), Gorgues, Thomas (collab.), Ferreira Santos, C. (collab.), Bamy, I.L. (collab.), Barry, I. (collab.), Sidibe, M. (collab.), Diadhou, H. (collab.), Vareilles, M. de (collab.), Ekau, W. (collab.), Keenlyside, N. (collab.), Nascimento, J.M. (collab.), Ramos, V. M. (collab.), Sow, B.A. (collab.), Fock, H. (collab.), Schmidt, J. (collab.), Mbaye, A. (collab.), Fall. A. (collab.), Monteiro, I. (collab.), Kouassi, A.M. (collab.), Silva, O. (collab.), Brochier, Timothée (collab.), Sall. M. (collab.), Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD), and Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, [SDE.BE] Environmental Sciences/Biodiversity and Ecology, SENEGAL, [SDE.MCG] Environmental Sciences/Global Changes, [SHS.DROIT]Humanities and Social Sciences/Law, AFRIQUE DE L'OUEST, [SHS.DROIT] Humanities and Social Sciences/Law, [SDU.OCEAN] Sciences of the Universe [physics]/Ocean, Atmosphere, [SDE.MCG]Environmental Sciences/Global Changes, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, MAURITANIE, CAP VERT, ATLANTIQUE
Abstract

ICAWA : International Conference AWA, Mindelo, CPV, 13-/11/2017 - 17/11/2017; Marine environmental law has been emerging in West Africa in 70's. International convention has been ratified and national law progressively developed. This communication will show the development of marine environmental law in West African countries using examples from Senegal, Mauritania and Cabo-Verde. This field of law use to be very sectorial. However, the development of integrative ways of regulations at international level impacts West African national law on marine environment. Lastly, examples of first steps toward an integrative way of regulation are underlined in West African countries.

Published
2019

5. The economic impacts of Marine Protected Area on Senegalese small pelagic fisheries [résumé]

Author

Ba, Aliou, Chaboud, Christian, Schimdt, J., Diouf, M., Fall, M., Dème, M., Brehmer, Patrice, Laboratoire des Sciences de l'Environnement Marin (LEMAR) (LEMAR), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut national des sciences de l'Univers (INSU - CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS), Institut de Recherche pour le Développement (IRD), Institut Sénégalais de Recherches Agricoles [Dakar] (ISRA), MARine Biodiversity Exploitation and Conservation (UMR MARBEC), Centre National de la Recherche Scientifique (CNRS)-Université de Montpellier (UM)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Institut de Recherche pour le Développement (IRD), Christian-Albrechts-Universität zu Kiel (CAU), Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), Brehmer, Patrice, Brehmer, Patrice (ed.), Diogoul, N. (collab.), Zenk, C. (collab.), Vareilles, M. de (collab.), Keenlyside, N. (collab.), Nascimento, J.M. (collab.), Ramos, V. M. (collab.), Sow, B.A. (collab.), Fock, H. (collab.), Schmidt, J. (collab.), Ekau, W. (collab.), Mbaye, A. (collab.), Fall. A. (collab.), Monteiro, I. (collab.), Kouassi, A.M. (collab.), Silva, O. (collab.), Brochier, Timothée (collab.), Sall. M. (collab.), Mayif, M. (collab.), Koné, V. (collab.), Gorgues, Thomas (collab.), Ferreira Santos, C. (collab.), Bamy, I.L. (collab.), Barry, I. (collab.), Sidibe, M. (collab.), and Diadhou, H. (collab.)

Subjects
[SDU.OCEAN]Sciences of the Universe [physics]/Ocean, Atmosphere, SENEGAL, AFRIQUE DE L'OUEST, [SDE.MCG]Environmental Sciences/Global Changes, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, ATLANTIQUE
Abstract

ICAWA : International Conference AWA, Lanzarote, ESP, 17-/04/2018 - 20/04/2018; In the early 2000s, Senegal set up several Marine Protected Areas (MPAs) along its coastal zone for the purpose of biodiversity conservation and the sustainably of fisheries. However, the impact of MPAs may vary depending on the types of fishing. In Senegal, the sardinella fishing accounts for 70% of total catches. This fishery is of crucial for food security and employment. Given this importance, it is necessary to evaluate the impact of the MPAs often considered as a tool for fisheries management. An analytical, dynamic and spatial bio-economic model of sardinella fishery has been developed and simulations over 40 years were carried out. The model takes into account the migration of the resource and that of fishermen. The main results show that the fishery is economically overexploited and that the society loses about 15 billion CFA over 40 years of exploitation, i.e. 375 million CFA per year. To reach an optimal level of exploitation, it would be necessary to halve the current fishing capacity. The closure rates of 10, 20 and 30% lead to increases in biomass (8 to 28%) and rent (5 to 11%). Spatio-temporal closure measures lead inevitably to overcapacity in unclosed areas. The objective 11 of the Aichi Convention will have a reserve effect on the resource but also weak improvements in economic indicators for this fishery. Lastly we show that if we expect that the MPAs provide a significant impact on sardinella fishery in Senegal, they should be accompanied by a limitation of fishing capacity.

Published
2018

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