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Growth, and Stock Status Assessment of African Catfish, Clarias anguillaris (Linnaeus, 1758) from Burkina Faso Newly Man-Made Lake Samandeni

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Advances in Bioscience and Biotechnology 2023年第7期14卷 346-357页

作者： Nomwine Da Raymond Ouedraogo adama oueda Institute for the Environment and Agricultural Research National Center for Scientific and Technological Research Ouagadougou Burkina Faso Animal Biology and Ecology Laboratory Joseph Ki-Zerbo University Ouagadougou Burkina Faso

The Samandeni reservoir in Burkina Faso, impounded in 2017, hosts a significant diversity of fish, including the Clariidae family. The fish stocks have been exploited since 2019, when the reservoir was opened to fishermen. However, no assessment of the status of these stocks has been conducted. The present study focused on the dynamics of Clarias anguillaris exploitation in order to have reliable information that can contribute to the planning of its sustainable exploitation. Length-frequency data on 323 individuals were sampled from commercial catches from March 2021 to February 2022. The growth parameters were determined using ELEFAN method and the stock assessment was done using the Bayesian Length-Based Biomass (LBB) method. The growth analysis showed isometry for both male and female fishes with allometric coefficient value of 3.03, 3.01 and 3.17 respectively for mixed sexes, male and female. Estimates values (0.6 and 0.4) of the growth oscillation intensity indicate the existence of seasonal growth. The relative biomass (B/B0) estimated for C. anguillaris was less than the relative biomass that produces the maximum sustainable yield (BMSY/B0) indicating biomass overfishing. In addition, the length at first capture was less than the optimal length at first capture indicating a growth overfishing status. Therefore, it would be desirable to increase the mesh size of the fishing gear so that juveniles are not caught, which will ensure an ecological sustainability of the exploitation of the Clariidae.

关键词： Growth Stock Status Clarias anguillaris Samandeni Reservoir Burkina Faso

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Growth, Population Parameters and Stock Status of Sarotherodon galilaeus in Samandeni Reservoir, Burkina Faso

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Open Journal of Ecology 2024年第4期14卷 257-273页

作者： Nomwine Da Raymond Ouedraogo Mahamoudou Minoungou adama oueda Institute for the Environment and Agricultural Research National Center for Scientific and Technological Research Ouagadougou Burkina Faso Animal Biology and Ecology Laboratory Joseph Ki-Zerbo University Ouagadougou Burkina Faso

Mango tilapia, Sarotherodon galilaeus is one of the most caught fish species in the Samandeni multi-species fishing sites of which, few data on its biology and exploitation are available. The study aimed to Assess the stock status of S. galilaeus. Sampling was conducted from March, 2021 to February 2022 based on commercial fish catches to analyze growth parameters, first sexual maturity size and harvest status of the stock. A total of 572 specimens including 297 females and 275 males were examined. The stock assessment was performed by using the Length based Bayesian method of Biomass (LBB) and that of growth by the ELEFAN method. The growth parameters showed a seasonality of growth and females appeared to grow faster than males. On the other hand, males had a greater asymptotic length than females. Results on the estimated length of fish at first maturity showed that females firstly reached the maturity compared to males. The relative biomass (B/B0) estimated for the stock was higher than the relative biomass that produces maximum sustainable yield (BMSY/B0) indicating healthy biomass. In addition, the length at first sexual maturity was less than the length at the first catch, indicating the absence of overfishing of growth. In addition, extending the study to the various stocks of the reservoir would be important for the sustainable management of the Samandeni high economic fishing area.

关键词： Growth Stock Status Sarotherodon galilaeus Samandeni Reservoir Maturity

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Ichthyoplankton Population in the Estuaries and Mangroves of Sangaréah Bay

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Open Journal of Ecology 2024年第11期14卷 879-890页

作者： Ousmane Sangaré adama oueda Yabyouré Marc-Florent Sawadogo Ahmed Guissé Fanta Touré Ecole Suprieure du Tourisme et de lHotellerie (ESTH) Conakry Guinea Laboratoire de Biologie et cologie Animales Unit de Formation et de Recherche en Sciences de la Vie et de la Terre Universit Joseph KI-ZERBO Ouagadougou Burkina Faso Centre de Recherche Scientifique de Rogban Conakry Guinea Ministre de lEnseignement Suprieur de la Recherche Scientifique et de lInnovation Conakry Guinea

This study concerns the density and biomass of the ichthyoplankton population in the estuaries and mangroves of Sangaréah Bay. The study resulted in the inventory of 5938 individuals divided into 20 families and 30 species, more dominated by the Carangidae, Clupeidae and Sciaenidae, which each account for 10% of the species total population. A high concentration of planktonic ichthyo organisms was observed in the Sonfonia, Samatran, Soumba and Arabanty areas. In short, the constant presence of eggs and larvae of ontogenetic stages make these estuary and mangrove zones environments of advection, migration, ontogenetic development and feeding. Ichthyoplankton is one of the modern tools used in the bio-indication and bio-monitoring of aquatic ecosystems. A diverse population dominated by fish eggs and larvae is a sign that the ecosystems surveyed are functioning properly.

关键词： Estuaries Mangroves Sangaréah Bay Ichthyoplankton Species

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Modeling Bat Species Richness and Spatial Distribution in Burkina Faso

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Open Journal of Ecology 2021年第11期11卷 790-806页

作者： Napoko Malika Kangoyé adama oueda Rimwaodo Pierre Silga Idrissa Ouedraogo Wendengoudi Guenda Boureima Gustave Kabre Life and Earth Sciences Training and Research Unit University Joseph Ki-Zerbo Ouagadougou Burkina Faso

The spatial distribution of bats in Burkina Faso is little-known. Previous studies have only described the bat species’ richness in Burkina Faso. This study was conducted to highlight bat species’ richness distribution within Burkina Faso and environmental variables that influence this distribution with the aim to give support for protection and further sampling for biodiversity. The Species Distribution Models (SDMs) were used to perform this study. To do that, species occurrences were collected throughout literature and field sampling and correlated to environmental variables through the Maxent software (Maximum Entropy). Our modeling variables included climate, vegetation cover, topography and hydrography data. The Jackknife test was performed to determine the importance of environmental variables that influence the species distribution model. The results showed that bats are present in all areas of vegetation in Burkina Faso. Species richness varies across the country. The species richness for major families increases from North to South. The total annual precipitation and topography are the main variables that positively influence bats distribution in Burkina Faso but the bare ground cover and standard deviation of the maximum temperature negatively influence this distribution. This modeling approach of bat species richness is important for policies makers and represents an invaluable tool in ecological management, particularly in the current context of climate change.

关键词： Bats Distribution Species Model Richness Maxent Burkina Faso

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Impact of Anthropogenic Activities on the Abundance of Crocodylus suchus (Saint-Hilaire 1807) within the Nazinga Game Ranch, Burkina Faso

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Open Journal of Ecology 2022年第12期12卷 788-803页

作者： Ilassa Ouedraogo adama oueda M. Emmanuel Hema Matthew H. Shirley B. Gustave Kabre Departement de Sciences de la Vie et de la Terre Université de Ouahigouya Ouahigouya Burkina Faso Laboratoire de Biologie et écologie Animales Université Joseph Ki-Zerbo Ouagadougou Burkina Faso Unité de Formation et de Recherche/Sciences Appliquées et Technologiques Université de Dédougou Dédougou Burkina Faso Institute for the Environment Florida International University North Miami USA

In Burkina Faso, human activities are practiced in Nazinga Game Ranch (NGR) which is colonized by West African crocodiles Crocodylus suchus (Geoffroy Saint-Hilaire 1807) decades ago. This study which aims to estimate impact of anthropogenic activities on abundance of C. suchus has been conducted in NGR reservoirs. For data collection, C. suchus populations were counted morning, afternoon and night from October 2015 to May 2017 in 11 reservoirs. Binoculars were used for remote observations and spotlight was used by night. According to the size of the sites and its accessibility, direct observations were carried out on foot or by canoe. Every time we observed crocodiles, they were numbered and added information such as their size, their behavior, geographical coordinates and the type of habitat were collected. Human activities were noted after direct observations. The R software version 3.5.3 was used for data analysis. A total of 1849 crocodiles including hatchlings, juveniles, subadults and adults were counted in these 11 reservoirs of the NGR. They were more abundant in reservoirs than rivers with highest abundances in Akalon, Akwazena, Kalieboulou and Barka. Crocodile showed very high visibility at night their abundances showed important correlation with human activities and environmental factors such as roads, fishing, tourism, moon phases and “died crocodiles” and in NGR.

关键词： Crocodylus suchus Abundance Human Activities Protected Area Burkina Faso

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Trophic Structure of the Fish Community in the Samandeni Reservoir—Burkina Faso

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Open Journal of Ecology 2023年第9期13卷 621-632页

作者： Minoungou Mahamoudou Kiendrebeogo Seni Ouedraogo Raymond Da Nomwine Sawadogo Marc Florent Yabyoure Bance Victor oueda adama Laboratoire de Biologie et écologie Animales Unité de Formation et de Recherche en Sciences de la Vie et de la Terre Université Joseph KI-ZERBO Ouagadougou Burkina Faso Ministère de l’Environnement de l’Economie verte et du Changement Climatique Ouagadougou Burkina Faso Département Environnement et Forêts Institut de l’Environnement et Recherches Agricoles Ouagadougou Burkina Faso Filière Agrosylvopastorale Centre Universitaire Polytechnique de Manga Université Norbert Zongo Koudougou Burkina Faso

From November 2020 to August 2022, the diet of 12 fish species from the Samandeni reservoir was examined in order to describe the diet and the trophic level of each of them. The analysis of this vital function allows a better knowledge of the concerned ecosystem and gives opportunity for its better management. The fish were sampled with gill nets and cast net. A total of 213 stomach contents of individuals belonging to 12 species grouped in 7 families and 10 genera were analysed. Results showed low to medium vacuity coefficients. The preys were mainly composed of fish, insects, detritus, zooplankton and phytoplankton. Variability in the use of resources by individuals was evident. Thus, the 12 species were classified as fish-eating predators, granivorous, zooplanktivorous, insectivorous and filter-feeding microphages. Then, the fish trophic structure of the Samandeni reservoir was elaborated.

关键词： Diet Vacuity Coefficient Trophic Organisation Samandeni Burkina Faso

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Risk of Waterborne Parasitic Infection among Vegetables Producers in the City of Ouagadougou, Burkina Faso: An Attempt to Quantify Them Using the Quantitative Microbiological Risk Assessment Method

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Agricultural Sciences 2022年第1期13卷 10-24页

作者： Noellie W. Kpoda Hamidatu S. Darimani adama oueda Idrissa Ouédraogo Gustave B. Kabré Department of Animal Biology and Physiology Laboratory of Animal Biology and Ecology Joseph Ki-Zerbo University Ouagadougou Burkina Faso Faculty of Engineering Department of Agricultural Engineering Dr. Hilla Limann Technical University Wa Ghana

The use of wastewater in urban agriculture has been promoted as an alternative to water scarcity and as a means to increase soil fertilizer. However, the use of wastewater in urban agriculture raises major public health concerns, mainly due to the often high concentration of pathogenic micro-organisms. Waterborne parasites are a major health concern in this regard, especially in endemic areas, mainly due to the high environmental resistance of eggs/cysts combined with a low infectious dose. In this study, the parasitological risk to vegetables producers in Ouagadougou using polluted water was evaluated through the quantitative microbiological risk analysis method. For this purpose, the search for and quantification of viable parasite eggs and cysts in irrigation water was coupled with epidemiological surveillance of vegetables producers in Ouagadougou. Protozoa and helminths belonging to 9 species were recorded and samples analyzed. These include Ancylostoma sp., Ascaris lumbricoides, tapeworm’s sp, Strongyloides stercoralis, Entamoeba histolytica, Giardia lamblia. Despite the variability of isolated parasitic species, Ancylostoma sp. eggs were common and severe to all types of water. Moreover, epidemiological approach showed that there were more parasitic species found in irrigation water and also other parasitic species circulating among vegetable farmers. In addition, there is no statistical significant association between the type of water used for irrigation and the carried parasites by vegetable gardeners. However, contamination of the groups using the raw wastewater is once higher than those using well water. When one is interested in the groups using treated wastewater as a source of irrigation, these risks of contaminations are halved. These contaminations are halved when one looks at groups using treated wastewater as a source of irrigation water. Still, whatever the type of water used by the gardeners,

关键词： Urban Agriculture Polluted Water Parasites Health Risk Quantitative Microbiological Risk Assessment Burkina Faso

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Fishermen Local Knowledge and Aquatic Environmental Change: Impacts on Fishing and Adaptation Strategies in Volta Basin

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Open Journal of Ecology 2021年第7期11卷 507-526页

作者： Rimwaodo Pierre Silga adama oueda Winkom Noellie Kpoda Komandan Mano Idrissa Ouedraogo D. M. Peter Weesie Boureima Gustave Kabre Life and Earth Sciences Training and Research Unit University Joseph Ki-Zerbo Ouagadougou Burkina Faso Applied Sciences and Technology Training and Research Unit University of Dédougou Dédougou Burkina Faso University of Dori Dori Burkina Faso Sciences and Society Group (SSG) University of Groningen Groningen Netherlands

Climate researches predict that climate change will have an important impact on aquatic and terrestrial ecosystems. However, many fishermen do not have a lot of knowledge about climate change or how it might affect their fish catch yields and overall fishing operations in the future. The objective of this study was to assess local fishermen’s perception of global change on the ichthyofauna of the Volta Basin in Burkina Faso. Focus group interviews were conducted between March 2019 and July 2020 in 19 reservoirs of the Volta Basin. A total of 242 fishermen divided into 34 groups participated in the interviews. The results showed that fishermen are aware of climatic and anthropogenic threats to fish fauna. According to them, these global changes lead to important modifications in the structure of the ichthyofauna ranging from seasonal mortality of fish (Mormyridae) to the extinction of certain species such as those of the genera Lates, Hydrocynus and Heterotis. These changes also lead to a loss of fish habitat through silting and lower water levels in the reservoirs. Statistical analysis of the collected data showed that the main factors threatening the structure and dynamics of fish are mainly agriculture and market gardening around the dam lakes, the temperature increase and the trend of decreasing rainfall. Thus, the main pressures responsible for the mortality and/or extinction of fish are market gardening pollution (100%), bad fishing practices (63.15%) and high temperatures (47.5%). As for adaptation measures and management strategies, the most important were training and sensitization of stakeholders (78.94% of citations) followed by fish stocking (21.05%). This endogenous knowledge is important for the development of climate change adaptation programs.

关键词： Climate Variability Perception Fishing Burkina Faso

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First Research on Bat Bacteria in Burkina Faso (West Africa)

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Advances in Microbiology 2023年第9期13卷 462-476页

作者： Noel Gabiliga Thiombiano Géraud Joel Guigma Magloire Boungou Amana Metuor Dabire Bertrand Mèschac Adéchègoun Chabi Malika Kangoye adama oueda Jacques Simpore Laboratoire de Biologie et Ecologie Animales (LBEA) Unité de Formation et de Recherche/Science de la Vie et de la Terre (UFR/SVT) Université Joseph KI-ZERBO Ouagadougou Burkina Faso Laboratoire de Biologie Moléculaire et de Génétique (LABIOGENE) Ouagadougou Burkina Faso University de Dédougou Dédougou Burkina Faso Université de Ouahigouya Ouahigouya Burkina Faso

The world is in turmoil with the emergence of various diseases in which bats play a key part. Indeed, bats are known to host bacteria that can create major public health problems. The investigation into bat bacteria was carried out from December 2020 to September 2021 at seven sites in Burkina Faso. Bat specimen collection occurred from 6 pm to 5 am with mist nets. On each bat captured, an oral and rectum swab was taken to search for bacterial species using standard bacterial culture methods. A total of 204 bats representing 11 species were captured. 183 bat specimens were infected by at least one bacterium with a prevalence of 89.7%. 54 species of bacteria divided into 30 genera were identified from the 183 specimens. Bacterial species richness was the highest in the bat Mops condylurus (A. Smith, 1833) followed by Epomophorus gambianus (Ogilby, 1835). Genus Escherichia was the most frequent of the bat species. Genus Pseudomonas alone is represented by six species. The most infected site was the rectum, from which we isolated 44 species of bacteria out of the 54 species. The most infected locality was Ouagadougou. Bacteria are highly pathogenic to humans and may be responsible for public health problems, such as Shigella sp. was identified and bacteria known to cause harm to bats such as Yersinia and Pasteurella were also isolated. From this study, decisions on the management of public health problems can be considered drown to avoid the emergence and re-emergence of certain zoonotic diseases.

关键词： Chiroptera Bacteria Prevalence Diversity Burkina Faso

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Farmers’perceptions on cultivation and the impacts of climate change on goods and services provided by Garcinia kola in Nigeria

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Ecological Processes 2018年第1期7卷 425-434页

作者： Onyebuchi Patrick Agwu adama Bakayoko Saka Oladunni Jimoh Porembski Stefan WASCAL Graduate Research Program on Climate Change and Biodiversity Universite´Felix Houphouet BoignyBP 165Abidjan 31Côte d’Ivoire Centre Suisse de Recherches Scientifiques en Côte d’Ivoire(CSRS) UniversitéNangui AbrogouaAbidjanCôte d’Ivoire Department of Social and Environmental Forestry University of IbadanIbadanNigeria Institute for Biodiversity Research University of RostockRostockGermany

Background:Garcinia kola is an indigenous multipurpose tree species commonly found in the tropical rain forest zone of West and Central *** economic,ecological,and socio-cultural benefits for people,they have potentials to improve the regional and local income generation to the farmers but the cultivation of the species is very limited in ***:The study investigated cultivation and farmers’perceptions on the impacts of climate change on goods and services provided by *** in *** questioners and interviews were *** data obtained was analyzed using descriptive and inferential statistic such as frequency,percentage,chi-square,and multinomial logit regressions with SPSS Version 20 and R software Version ***:The results show that farmers are presently not cultivating ***,and most of the available stands were inherited from *** farmers still believe it is only God that can make *** to germinate;however,information about the new improved methods of raising *** was not spread across farmers’*** 93%of these farmers were not aware of these new methods,and the only means they raise the species is by picking the wildlings that regenerate naturally close to mother tree and are rarely *** finding also shows that farmers are well aware of climate change and its impact on crop productivity is not clear to *** result shows that five explanatory variables(age,gender,marital status,education level,household size and primary occupation)are the main factors significantly influencing farmers’perception of climate change and the cultivation of the *** interview section,the farmers reported variability of Harmattan season influences fruit production of the species;according to them,increase in Harmattan season usually leads to increase in fruiting of ***:Based on our findings,all the 215 respondent interviewed agree that climatic variability influences the availabi

关键词： Garcinia kola Propagation Multipurpose species Farmers Climate change Harmattan season

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