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1. A review of the ecological knowledge on the species Batrachoides liberiensis in estuarine and lagoon environments of West Africa.

Author

Simier, Monique, Sadio, Oumar, Tito de Morais, Luis, and Ecoutin, Jean‐Marc

Subjects
LAGOONS, GASTROINTESTINAL contents, WATER temperature, SPECIES, SEX ratio, MOLLUSKS
Abstract

Copyright of African Journal of Ecology is the property of Wiley-Blackwell and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)

Published
2023
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2. The PPEAO experimental fishing dataset : fish from West African estuaries, lagoons and reservoirs [Data paper]

Author

Simier, Monique, Ecoutin, Jean-Marc, and Tito de Morais, Luis

Subjects
Tropical area, Fish, Estuary, West Africa, Coastal area, Crustacean, Lagoon, Mollusc, Experimental fishing, Reservoir lake
Abstract

Background This paper describes a dataset of fish, crustacean and mollusc occurrences extracted from the "Experimental Fishing" section of the IRD's PPEAO information system. PPEAO stands for "Fish communities and artisanal fisheries of West African estuarine, lagoon and freshwater ecosystems". This database contains information collected using two different methods: experimental fishing and surveys of the artisanal fisheries that exploit these ecosystems. The database is accessible at

Published
2019

3. Acoustic Survey of an Estuarine Marine Protected Area and of its Close Vicinity: Analysis and Monitoring Prospective

Author

Béhagle, Nolwenn, Guillard, Jean, Ecoutin, Jean-Marc, Laë, Raymond, Sow, Ibrahima, Tito De Morais, Luis, Lebourges-Dhaussy, Anne, Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL), Institut National de la Recherche Agronomique (INRA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), 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), ANR-07-BDIV-0009,AMPHORE,Les aires marines protégées : outil de conservation de la biodiversité et de gestion durable des ressources halieutiques.(2007), 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)-Institut Universitaire Européen de la Mer (IUEM), Institut de Recherche pour le Développement (IRD)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Brest (UBO)-Centre National de la Recherche Scientifique (CNRS), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de la Recherche Agronomique (INRA), Centre de Recherche Océanographique de Dakar-Thiaroye (CRODT), and Institut Sénégalais de Recherches Agricoles [Dakar] (ISRA)

Subjects
geography, geography.geographical_feature_category, Estuary, Marine Protected Areas, General Medicine, Oceanography, Fish, Hydro-acoustics, West Africa, Environmental science, Marine protected area, 14. Life underwater, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, ACLN, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; Facing the loss of fish biodiversity and the decrease of fish stocks since several decades, a proposed solution is the multipli-cation of Marine Protected Areas (MPA). In Senegal, one MPA has been implemented in 2003 in one of the channels composing the Sine Saloum estuary. A monitoring program was carried out based on hydro-acoustic survey and the two main metrics extracted from hydro-acoustic data: Fish biomass proxy and fish size distribution proxy. The surveys were performed using vertical beaming at differ-ent seasons from 2003 to 2010. In the MPA, a light increase of the fish biomass proxy and an increase of the fish size proxy during the dry season were observed. The biomass proxy recorded in a close but not protected tributary were higher than in the MPA, probably due to a strong connection with open marine water, aggregative be-havior of preys in the MPA due to higher predation, and a stronger avoidance phenomenon in the MPA. The high variability of the MPA environment submitted to both estuarine and marine influences and the size of the MPA may explain the lack of clear results. However, the learned lessons enable us to make recommendations to monitor fish population in MPAs using hydroacoustic methods. Evaluation procedures using these methods are proposed highlighting the im-portance of a rigorous survey protocol to insure the exploitation of the entire acquired time series.

Published
2018

4. More and more marine protected areas ?

Author

Bonnin, Marie, Laë, Raymond, Behnassi, Mohamed, Tito de Morais, Luis, 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), Université Ibn Zohr [Agadir], IUCN, ANR-07-BDIV-0009,AMPHORE,Les aires marines protégées : outil de conservation de la biodiversité et de gestion durable des ressources halieutiques.(2007), Tito de Morais, Luis, Biodiversité - Les aires marines protégées : outil de conservation de la biodiversité et de gestion durable des ressources halieutiques. - - AMPHORE2007 - ANR-07-BDIV-0009 - BDIV - VALID, 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 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)

Subjects
[SDE.BE] Environmental Sciences/Biodiversity and Ecology, Mpa effects, [SHS.DROIT]Humanities and Social Sciences/Law, [SHS.DROIT] Humanities and Social Sciences/Law, West Africa, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, AFF
Abstract

International audience; Presentation of the book (in French): Bonnin, M., R. Laë, M. Behnassi (Eds). Les aires marines protégées. Défis scientifiques et enjeux sociétaux enAfrique du Nord-Ouest. IRD éditions.The book provides an interdisciplinary perspective on the unprecedented development of marine protected areas.Several examples centered on North-West Africa illustrate both successes and the uncertainties of science on this issue and the hopes placed in the use of MPAs as tools for the conservation and sustainable use of marine and coastal areas.

Published
2014

5. Fish population surveys in estuaries: a comparison between acoustic at moored stations and purse seine surveys

Author

Tito De Morais, Luis, Guillard, Jean, Simier, Monique, Sow, Ibrahima, Raffray, Jean, Albaret, Jean-Jacques, Institut de Recherche pour le Développement (IRD), Réponses adaptatives des populations et des peuplements de poissons aux pressions de l'environnement (RAP), Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL), Institut National de la Recherche Agronomique (INRA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), Centre de Recherche Océanographique de Dakar-Thiaroye (CRODT), Institut Sénégalais de Recherches Agricoles [Dakar] (ISRA), Institut de recherche pour le développement (IRD [Sénégal]), Centro EPOMEX-Universidad Autónoma de Campeche (Mexico), UMR 212 EME 'écosystèmes marins exploités' (EME), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM), Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de la Recherche Agronomique (INRA), and Tito de Morais, Luis

Subjects
AFRIQUE DE L'OUEST, [SDV]Life Sciences [q-bio], EAF, Fish communities, [SDV.SA.STP] Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery, estuary, purse seine, [SDE.BE] Environmental Sciences/Biodiversity and Ecology, West Africa, [SDV.SA.STP]Life Sciences [q-bio]/Agricultural sciences/Sciences and technics of fishery, FISCH COMMUNITIES, ACOUSTIQUE, ESTUAIRE, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, acoustics, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; In most estuarine ecosystems, the fish biomass is difficult to estimate, since most of the standard sampling methods are difficult to implement and may be limited to certain biotopes. Moreover, Protected Areas are no longer limited to marine ecosystems and several protected areas have been created in estuaries, lagoons or mangrove environments. In these areas, turbid waters do not allow direct diving observations and fish sampling, often performed using destructive – because efficient and non selective - gears such as trawling or seine nets, is always an ethic problem. As a consequence there is an increased need for liable, non-destructive methods to study fish assemblages in these environments. In order to describe the fish biomass distribution and evolution in the Gambia estuary, five research surveys have been conducted at different hydrological seasons. The fish assemblages were sampled by vertical echo-sounding at moored stations and at the same time and same location with a purse seine. The purpose of this work, still in process, is to compare the two methods, to try to inter-calibrate them and to seek for their complementarity. Though significant, the global direct correlation between estimations of biomass performed with the two sampling methods were too low to be considered satisfactory. Moreover the level of correlation between the two methods varies extensively following the survey, the season or the zone of the estuary taken into account. The role of the main environmental variables: depth, salinity, transparency and current strength on the quality of the correlation of the estimation made by the two methods was emphasized.

Published
2006

6. AMPHORE. Méthodologie générale. Du choix des indicateurs biologiques aux mécanismes écologiques et à l'intégration pluridisciplinaire

Author

Brind'Amour, A., Simier, Monique, Pastor, J., Tomasini, J.-A., Samba, A.O., Mouillot, D., Francour, P., Kopp, D., Ferrer, R., Tito De Morais, Luis, Ctr Nantes, Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER), UMR 212 EME 'écosystèmes marins exploités' (EME), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM), Ecosystèmes lagunaires : organisation biologique et fonctionnement (ECOLAG), Université Montpellier 2 - Sciences et Techniques (UM2)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Centre National de la Recherche Scientifique (CNRS), Ecosystèmes Côtiers Marins et Réponses aux Stress (ECOMERS), Université Nice Sophia Antipolis (... - 2019) (UNS), COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA), Laboratoire Ecologie Fonctionnelle et Environnement (ECOLAB), Université Toulouse III - Paul Sabatier (UT3), Université Fédérale Toulouse Midi-Pyrénées-Université Fédérale Toulouse Midi-Pyrénées-Institut Ecologie et Environnement (INEE), Centre National de la Recherche Scientifique (CNRS)-Centre National de la Recherche Scientifique (CNRS)-Institut National Polytechnique (Toulouse) (Toulouse INP), Université Fédérale Toulouse Midi-Pyrénées-Observatoire Midi-Pyrénées (OMP), Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Université Fédérale Toulouse Midi-Pyrénées-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Météo France-Centre National d'Études Spatiales [Toulouse] (CNES)-Centre National de la Recherche Scientifique (CNRS)-Institut de Recherche pour le Développement (IRD)-Centre National de la Recherche Scientifique (CNRS), 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), and ANR-07-BDIV-0009,AMPHORE,Les aires marines protégées : outil de conservation de la biodiversité et de gestion durable des ressources halieutiques.(2007)

Subjects
mpa, fisheries, West Africa, Indicators, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, COM, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2011

7. Use and limits of three assessment methods of fish size spectra and abundance in two tropical man-made lakes

Author

Coll, Céline, Tito De Morais, Luis, Lae, Raymond, Lebourges-Dhaussy, Anne, Simier, Monique, Guillard, Jean, Josse, Erwan, Ecoutin, Jean-Marc, Albaret, Jean-Jacques, Raffray, Jean, Kantoussan, Justin, Réponses adaptatives des populations et des peuplements de poissons aux pressions de l'environnement (RAP), Institut de Recherche pour le Développement (IRD), Hydro-acoustique appliquée à l'halieutique, à l'écologie et à l'éthologie aquatiques (ACAPPELLA), UMR 212 EME 'écosystèmes marins exploités' (EME), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM), Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques (CARRTEL), Institut National de la Recherche Agronomique (INRA)-Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry]), and Université Savoie Mont Blanc (USMB [Université de Savoie] [Université de Chambéry])-Institut National de la Recherche Agronomique (INRA)

Subjects
Artisanal fisheries, West Africa, Fish sampling, Shallow waters, Size distribution, Hydroacoustic, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, Abundance estimate
Abstract

International audience; A comparative study, combining three different assessment methods (fish gillnet sampling, artisanal fisheries surveys and hydroacoustics) was conducted in Mali where two man-made reservoirs (Sélingué and Manantali) are particularly suited for investigating the impact of fishing effort on the fish assemblage. These two ecosystems have relatively similar areas, edaphic and environmental properties but are subjected to different levels of fishing exploitation (low at Manantali, high at Sélingué). The comparison is based on two indicator parameters: the abundance indices and the size spectra distributions, obtained by the three methods at two contrasting hydrological seasons (April and October). The results were compared first between the two seasons, and then between the two lakes. The present work is based on two main hypotheses: (1) that there is a higher fish abundance in October associated with smaller overall sizes, after spawning; (2) a lower abundance and smaller sizes in the Sélingué reservoir than in Manantali, because of the much higher fishing pressure in Sélingué. The relevance of each method to the selected indicators is discussed. On the one hand, the three methodologies on the whole gave similar conclusions and they also complement each other. On the other hand, some results do not match the hypotheses because of biases due to difficulties and technical limitations of each method in such ecosystems (shallow water with vegetation and stumps of former forests)

Published
2007

8. Effect of a marine protected area on tropical estuarine fish assemblages: Comparison between protected and unprotected sites in Senegal.

Author

Sadio, Oumar, Simier, Monique, Ecoutin, Jean-Marc, Raffray, Jean, Laë, Raymond, and Tito de Morais, Luis

Subjects
MARINE parks & reserves, ESTUARINE fishes, COMPARATIVE studies, ACQUISITION of data, BIOINDICATORS, FISH diversity
Abstract

A comparative study of fish assemblages of a marine protected area and an exploited area was carried out in the Sine Saloum estuary (Senegal, West Africa). Data were collected at these two sites between 2008 and 2011. The two areas are morphologically similar, and comparison of the physicochemical parameters (salinity, transparency, temperature and percentage of saturation of dissolved oxygen) showed that the water masses are similar. The bio-ecological indicators and ecological, trophic and size structures were also compared. Given the environmental similarity of the two sites, their differences in bio-ecological characteristics and fish assemblage organization can be explained by the protection status of the MPA. The species richness and fish abundance per sampling unit were higher in the exploited site, but the mean trophic level and the observed maximum size of individuals were higher in the MPA. Although slightly higher for the MPA, the differences observed for biomass and average size between the two sites were not significant. The beta diversity in the MPA was higher than in the exploited site. The fish assemblage was dominated in terms of abundance by two pelagic herbivores Ethmalosa fimbriata (80%) and Sardinella maderensis (12.3%) and in terms of biomass by E. fimbriata (37.4%) and a benthic predator, Arius latiscutatus (23.7%). The assemblage of the MPA had a marine affinity characterized by the presence of piscivorous or generalist predators; large individuals were not uncommon. In the exploited site, the fish assemblage was relatively stable, dominated in abundance by E. fimbriata (33.4%) and S. maderensis (32.8%). In terms of biomass, a species of mullet, Liza dumerili , ranked first (26.2%), followed by E. fimbriata (22.4%) and S. maderensis (14.9%). The assemblage in the exploited site had a more estuarine affinity, dominated by detritivorous or phytophagous herbivores. Individuals observed there were mostly of small or medium size. This study confirms that the establishment of MPA is an effective tool for restoring marine biodiversity and trophic structure of fish assemblages. [ABSTRACT FROM AUTHOR]

Published
2015
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9. Aires marines protégées, défis scientifiques et enjeux sociétaux

Author

Luis Tito de Morais, Marie Bonnin, Raymond Laë, Behnassi, M., 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), ANR-07-BDIV-0009,AMPHORE,Les aires marines protégées : outil de conservation de la biodiversité et de gestion durable des ressources halieutiques.(2007), Tito de Morais, Luis, and Biodiversité - Les aires marines protégées : outil de conservation de la biodiversité et de gestion durable des ressources halieutiques. - - AMPHORE2007 - ANR-07-BDIV-0009 - BDIV - VALID

Subjects
[SDE.BE] Environmental Sciences/Biodiversity and Ecology, mpa, West Africa, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, COM, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2014

10. Efficacité d’une Aire Marine Protégée comme outil de restauration des ressources marines : l’expérience ouest-africaine

Author

Sadio, O., Ecoutin, J. M., Luis Tito de Morais, Monique Simier, Raffray, J., Raymond Laë, Tito de Morais, Luis, Biodiversité - Les aires marines protégées : outil de conservation de la biodiversité et de gestion durable des ressources halieutiques. - - AMPHORE2007 - ANR-07-BDIV-0009 - BDIV - VALID, 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 [Sénégal]), UMR 212 EME 'écosystèmes marins exploités' (EME), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM), Institut de Recherche pour le Développement (IRD), and ANR-07-BDIV-0009,AMPHORE,Les aires marines protégées : outil de conservation de la biodiversité et de gestion durable des ressources halieutiques.(2007)

Subjects
mpa, [SDE.BE] Environmental Sciences/Biodiversity and Ecology, West Africa, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, COM, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2014

11. The Bamboung Marine Protected Area(Sine Saloum, Senegal) Laboratory for field ecological studies in a tropical estuary

Author

Ecoutin, J. M., Diadhiou, H., Raymond Laë, Oumar SADIO, Monique Simier, Thiaw, M., Luis Tito de Morais, Tous, P., 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), Centre de Recherche Océanographique de Dakar-Thiaroye (CRODT), Institut Sénégalais de Recherches Agricoles [Dakar] (ISRA), Institut de Recherche pour le Développement (IRD), Institut de recherche pour le développement (IRD [Sénégal]), UMR 212 EME 'écosystèmes marins exploités' (EME), Institut de Recherche pour le Développement (IRD)-Institut Français de Recherche pour l'Exploitation de la Mer (IFREMER)-Université de Montpellier (UM), ANR-07-BDIV-0009,AMPHORE,Les aires marines protégées : outil de conservation de la biodiversité et de gestion durable des ressources halieutiques.(2007), Tito de Morais, Luis, and Biodiversité - Les aires marines protégées : outil de conservation de la biodiversité et de gestion durable des ressources halieutiques. - - AMPHORE2007 - ANR-07-BDIV-0009 - BDIV - VALID

Subjects
[SDE.BE] Environmental Sciences/Biodiversity and Ecology, ACTI, mpa, West Africa, Bamboung, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, ComputingMilieux_MISCELLANEOUS
Abstract

International audience; no abstract

Published
2013

12. Étude du régime alimentaire de deux espèces de Cichlidae en situation contrastée dans un estuaire tropical inverse d'Afrique de l'Ouest (Casamance, Sénégal) Title: Study of the diet of two species of Cichlidae in contrasting situation in a West African (Casamance, Senegal) inverse tropical estuary

Author

Ndour, I., François Le Loc’h, Thiaw, O. T., Ecoutin, J. M., Raymond Laë, Raffray, J., Oumar SADIO, Luis Tito de Morais, Centre de Recherche Océanographique de Dakar-Thiaroye (CRODT), 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 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), Institut Universitaire de Pêche et Aquaculture (IUPA), Université Cheikh Anta Diop [Dakar, Sénégal] (UCAD), Institut de recherche pour le développement (IRD [Sénégal]), 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), and Tito de Morais, Luis

Subjects
Salinity, Estuaire inverse, trophic, contrasted situation, Casamance, Cichlidae, Senegal, Afrique de l'Ouest Keywords: Diet, [SDE.BE] Environmental Sciences/Biodiversity and Ecology, Salinité, Régime alimentaire, West Africa, Western Africa, [SDE.BE]Environmental Sciences/Biodiversity and Ecology, ACLN, Situation contrastée, inverse estuary
Abstract

National audience; The dam anti-salt of Maka was set up as 1998 on the river Casamance (Senegal) to restore the fresh water conditions for the benefit of the rice production activity of the local populations. It separates two environments of salinity contrasted: a downstream salted part under influence of the inverse estuary and an upstream part of fresh water. The comparative study of the diets of two Cichlidae Sarotherodon melanotheron heudelotii and Tilapia guineensis living on both sides on the anti-salt dam of Maka was made on the basis of samplings over three different periods in 2006 and 2007: a warm wet season (in October), a cold dry season (in February) and a warm dry season (in May). The diets of both species are approached by a classic method of analysis of the stomach contents by noting the occurrences of preys. Compared with the Ndour et al. (2011) J. Sci. Halieut. Aquat., 4: 120-133 121 populations of S. m. heudelotii and of T. guineensis who live upstream to the dam, those living downstream to the dam present more important occurrences of preys. S. m. heudelotii tends to ingest of advantage of plant fragments to the detriment of the mud when the salinity becomes high. On the other hand, T. guineensis who has a wider trophic spectrum, tends to consume more vase (bivalves) than of plant fragments, when the salinity increases. The comparison of the diets of this two Cichlidae on both sides of the dam, shows an evolution of their diets according to the environmental conditions.

Published
2011

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