The role of marine protected areas in sustaining fisheries: The case of the National Park of Banc d’Arguin, Mauritania

Trégarot, Ewan; Meissa, Beyah; Gascuel, Didier; Sarr, Ousmane; Valy, Yeslem El; Wagne, Oumar Hamet; Kane, Elimane Abou; Bal, Abou Ciré; Haidallah, Mohamed Saleck; Fall, Assane Deda; Dia, Abdou Daïm; Failler, Pierre

doi:10.1016/j.aaf.2020.08.004

Cited by 14 publications

(2 citation statements)

References 20 publications

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“…Our present-day habitat suitability predictions already identified the coast of Mauritania with a high presence probability, meaning that the species may colonize this area in the upcoming years. This prediction is of particular concern for the Banc d'Arguin National Park in Mauritania, a highly productive ecosystem, the largest marine protected area in western Africa, and a UNESCO World Heritage Site (Treǵarot et al, 2020). At these latitudes, non-i Atlantic blue crab populations may compete with three native congeners Callinectes amnicola (de Rochebrune, 1883), Callinectes marginatus (A. Milne-Edwards, 1861), and Callinectes pallidus (Rochebrune, 1883) (Manning and Holthuis, 1981).…”

Section: Current Distributionmentioning

confidence: 99%

Aquatic species shows asymmetric distribution range shifts in native and non-native areas

et al. 2023

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IntroductionClimate change is reshaping the geographical distribution of species across the globe. In marine ecosystems, climate change creates novel challenges to an environment impacted by numerous anthropogenic stressors. Forecasting shifts in species distribution, including the expansion of non-indigenous species under climate change scenarios, is a management challenge for today’s world.MethodsWe applied Bayesian Additive Regression Tree (BART) models to investigate the environmental factors modulating the occurrence and habitat preferences of the Atlantic blue crab Callinectes sapidus Rathbun, 1896 in native and non-native areas. With BART models, we also aimed to predict its current and future distributions under two climate change scenarios (RCPs 4.5 and 8.5). BART models were performed using global occurrences of the Atlantic blue crab – recorded from 1830 to 2022 – and several environmental covariates (i.e., water temperature, salinity, current velocity, and rugosity). Model accuracy was assessed with the Area Under the Curve (AUC) and True Skill Statistics (TSS) criteria. Cross-validation experiments were made to balance accuracy prediction and uncertainty model prediction intervals.Results and discussionAUC and TSS values indicated that data validation was successful for the BART model. Water temperature was the most critical variable affecting the presence probability of the Atlantic blue crab. The BART model predicts asymmetric distribution range shifts on both sides of the Atlantic Ocean. The non-native populations will experience broader shifts in their distribution range than in the native range, and the RCP 8.5 scenario model outputs predict a wider distribution range by the end of the century. Overall, we anticipate significant ecological changes in native and non-native areas. The range expansion in native areas is often equivalent to the ecological shifts induced by invasive species, so lessons learned by ecologists and managers in non-native areas will provide actionable insights to managers in native areas.

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Section: Current Distributionmentioning

confidence: 99%

Aquatic species shows asymmetric distribution range shifts in native and non-native areas

et al. 2023

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“…The aim of MPAs is to protect breeding grounds for fish, thus replenishing declining fish stocks (Assis et al, 2021;Marcos et al, 2021). However, globally the value of MPAs for conserving fisheries is contested and the results are highly context-dependent (Caveen et al, 2014;Di Franco et al, 2016;Kituyi and Thomson, 2018;Trégarot et al, 2020). The second measure that has been taken to mitigate the impact of climate change is the promotion of co-management to strengthen relationships and trust between stakeholders in the fisheries, and for the collective action toward sustainable fisheries management and climate change adaptation for artisanal fisheries (Pittman et al, 2019).…”

Section: Introductionmentioning

confidence: 99%

Alleviating impacts of climate change on fishing communities using weather information to improve fishers’ resilience

Okeke‐Ogbuafor

Taylor

Dougill

et al. 2022

Front. Environ. Sci.

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This study contributes new knowledge in evaluating actions aimed at alleviating impacts of climate change on small-scale fishers and enhancing resilience in their households in West Africa. Evidence of the damage caused by climate change to the artisanal fisheries sector in West African countries is accumulating. Current measures in place for artisanal fishers to adapt to these changes include broad long-term pro-poor strategies designed to manage the persistent problem of overfishing and declining fish stocks. However, one immediate coping strategy is beginning to emerge, the more active use of reliable weather information. Based on 80 semi-structured interviews conducted in Senegal, Ghana, and Nigeria between 2021 and 2022, this study investigates claims that the use of weather information (WI) is helping West African artisanal fishers and those involved in secondary fishery activities to build more climate-resilient household income and food security. Unlike the long-term measures for mitigating the impact of climate change, results from the study show that by assessing the risk, their marine capture activities using weather information, fishers are immediately benefitting. Using the diffusion of the innovation theory to investigate the pattern of fishers’ adoption and usage of weather information, we found that Senegalese marine artisanal fishers can be classified as “Early Adopters” of this innovation. However, this is not the case with inland fishers who remain skeptical and will only use weather information if they can ascertain its reliability. West Africa’s inland fisheries sector is often neglected in climate change strategies: there is a lack of coordinated action to understand the weather information needs of these vulnerable fishers in order to coassess and codevelop bespoke weather products that offer benefits to them. However, West Africa’s fisheries, especially those inland, are too important to ignore if the United Nations Sustainable Development Goals (UNSDGs), including no poverty and zero hunger, are to be achieved. To help this sector fully benefit from the use of weather information, this study recommends detailed research into the weather information needs of these fishers and user-friendly ways to engage with the fishers to transmit the information.

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Movement patterns of green turtles at a key foraging site: the Banc d’Arguin, Mauritania

Mestre,

Patrício,

Sidina

et al. 2024

Mar Biol

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Interactions with fisheries is a major threat to sea turtles. However, space-use at foraging locations remains overlooked in many populations, preventing effective protection. We assess the space-use of 14 juvenile and 24 adult green turtles (Chelonia mydas) satellite-tracked in 2018–2022 within a foraging site of global importance for this species, the Banc d’Arguin in Mauritania, West Africa. Turtles exhibited a patchy distribution and used overlapping habitats irrespective of sexes and life stages. Mean individual home range was larger (151.5 ± 160.5 km²) than values reported in most green turtle populations. Individuals concentrated in two main areas used year-round. Inshore/offshore movements seem to occur within the central part of the Banc d’Arguin, with turtles moving to deeper areas during colder months. More than half of the turtles performed within-season range shifts and switched between up to four distinct areas, with some individuals returning to previously visited sites. Turtles mostly exploited shallow areas (4.30 ± 3.42 m) and seemed to use disproportionally more of the areas inside the Parc National du Banc d’Arguin, than areas of similar bathymetry outside this marine protected area. This suggests that foraging green turtles have been benefiting from the management of the Park since it was established in 1976. However, turtles’ home range overlapped greatly with artisanal fisheries, which operate in the central shallow waters of the Park. The present study provides valuable ecological information that can be used to inform the planning of fisheries management zones, aiming to reduce the interactions between turtles and artisanal fisheries.

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The role of marine protected areas in sustaining fisheries: The case of the National Park of Banc d’Arguin, Mauritania

Cited by 14 publications

References 20 publications

Aquatic species shows asymmetric distribution range shifts in native and non-native areas

Aquatic species shows asymmetric distribution range shifts in native and non-native areas

Alleviating impacts of climate change on fishing communities using weather information to improve fishers’ resilience

Movement patterns of green turtles at a key foraging site: the Banc d’Arguin, Mauritania

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