Quantification of anthropogenic debris from small-scale fisheries and community-based aquaculture in marine and coastal ecosystems of Southwestern Madagascar. - 2025
Quantification of anthropogenic debris from small-scale fisheries and community-based aquaculture in marine and coastal ecosystems of Southwestern Madagascar.
[en] Most coastal populations in Southwestern Madagascar live on the resources provided by small-scale fishery (SSF), and over the past twenty years, sea cucumber and seaweed farming has grown significantly. This study analyzes the importance of these fisheries and community-based aquaculture (CBA) activities in the contribution of anthropogenic marine debris (AMD) to coastal ecosystems in Southwestern Madagascar. Sampling was conducted in the rainy and dry seasons in three sites with contrasted fishing and farming activities. We have investigated two important coastal ecosystems in these sites, the mangroves and the beaches. At all, about 16,000 AMD items, were collected predominantly plastics. A lower amount of AMD was observed in the rainy season compared to the dry season. The contribution of SSF and CBA activities to the AMD pollution is very important representing 40 % of all AMD in the initial survey. On beaches, 4003 items were found with an average density of 0.17 items m-2. In mangroves, 1039 items were found with an average density of 0.04 items m-2. The most polluted site by SSF and CBA items is Toliara with 3218 debris, Toliara being the one with the highest number of fishermen. The pollution brought by fishing is much more important than that brought by farming. The pollution concerns much more the beaches, where the fishermen start their activities.
Disciplines :
Chemistry
Author, co-author :
Raharinaivo, Lovasoa Rina ; University of Mons (UMONS) - Research Institute for Biosciences, Biology of Marine Organisms and Biomimetics Unit, 23 Place du Parc, B-7000 Mons, Belgium, University of Toliara - Test and Analysis of Materials research team at Institut Halieutique et des Sciences Marines (IH.SM), BP 141, Rue Dr. Rabesandratana, Mahavatse II, 601 Toliara, Madagascar, Marine Station of Belaza (UToliara-UMons-ULiège) at Institut Halieutique et des Sciences Marines (IH.SM), Saint Augustin's road, 602 Toliara, Madagascar. Electronic address: raharinaivolovasoa@gmail.com
Todinanahary, Gildas Boleslas Georges; University of Toliara - Test and Analysis of Materials research team at Institut Halieutique et des Sciences Marines (IH.SM), BP 141, Rue Dr. Rabesandratana, Mahavatse II, 601 Toliara, Madagascar, Marine Station of Belaza (UToliara-UMons-ULiège) at Institut Halieutique et des Sciences Marines (IH.SM), Saint Augustin's road, 602 Toliara, Madagascar
Delroisse, Jérôme ; University of Mons (UMONS) - Research Institute for Biosciences, Biology of Marine Organisms and Biomimetics Unit, 23 Place du Parc, B-7000 Mons, Belgium
Raquez, Jean-Marie ; Université de Mons - UMONS > Faculté des Sciences > Service des Matériaux Polymères et Composites
Bittencourt, Carla ; Université de Mons - UMONS > Faculté des Sciences > Service de Chimie des Interactions Plasma-Surface
Maherizo, Tiandrainy Gédice Fernand; University of Toliara - Test and Analysis of Materials research team at Institut Halieutique et des Sciences Marines (IH.SM), BP 141, Rue Dr. Rabesandratana, Mahavatse II, 601 Toliara, Madagascar, Marine Station of Belaza (UToliara-UMons-ULiège) at Institut Halieutique et des Sciences Marines (IH.SM), Saint Augustin's road, 602 Toliara, Madagascar
Lavitra, Thierry ; Université de Mons - UMONS > Faculté des Sciences > Service de Biologie des Organismes Marins et Biomimétisme
Eeckhaut, Igor ; Université de Mons - UMONS > Faculté des Sciences > Service de Biologie des Organismes Marins et Biomimétisme
Language :
English
Title :
Quantification of anthropogenic debris from small-scale fisheries and community-based aquaculture in marine and coastal ecosystems of Southwestern Madagascar.
Research Institute for Materials Science and Engineering
Funders :
Academy of Research and Higher Education
Funding text :
The research was performed within the research project for development \u201CBioplastics and village seaweed farming in Madagascar\u201D financially supported by ARES-CCD (Belgium). Lovasoa Rina RAHARINAIVO also benefited from support within the 2022 L'Or\u00E9al-UNESCO for Women in Science Young Talents of the Sub-Saharan Africa Program. We thank all persons who contributed to this research study from data collection to publication of the finalization of the manuscript. Special thanks to the field teams (Mr. Donn\u00E9, Mr. President FIMIHARA, Mr. Toto, Mr. Victor, Mr. Melan, Mr. Eric, and in particular all students' teams), Dr. Alessandra WHAITE, the laboratory teams (TEAM in Madagascar and BOMB in Belgium), for their help; and the anonymous reviewers, for their useful comments.The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Lovasoa Rina RAHARINAIVO reports financial support was provided by ARES-CCD (Belgium). If there are other authors, they declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.The research was performed within the research project for development \u201CBioplastics and village seaweed farming in Madagascar\u201D financially supported by ARES-CCD (Belgium). Lovasoa Rina RAHARINAIVO also benefited from support within the 2022 L'Or\u00E9al-UNESCO for Women in Science Young Talents of the Sub-Saharan Africa Program. We thank all persons who contributed to this research study from data collection to publication of the finalization of the manuscript. Special thanks to the field teams (Mr. Donn\u00E9, Mr. President FIMIHARA, Mr. Toto, Mr. Victor, Mr. Melan, Mr. Eric, and in particular all students' teams), Dr. Alessandra WHAITE, the laboratory teams (TEAM in Madagascar and BOMB in Belgium), for their help; and the anonymous reviewers, for their useful comments.
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