Aquatic Living Resources最新文献

{"title":"Sea urchin (Paracentrotus lividus) gut biomass as a co-product with antioxidant and antibacterial potential to supplement aquafeeds","authors":"Pierre Boudry,&nbsp;Fernando Pagels ,&nbsp;Inês Garrido ,&nbsp;Carla Teixeira ,&nbsp;Tânia G. Tavares ,&nbsp;Benjamin Costas ,&nbsp;F. Xavier Malcata ,&nbsp;Luisa M.P. Valente ,&nbsp;A. Catarina Guedes","doi":"10.1051/alr/2023022","DOIUrl":"10.1051/alr/2023022","url":null,"abstract":"<div><div>Sea urchin processing practices by the canning industry result in a large volume of waste due to a high fraction of inedible parts, in special the gut, that can still be a valuable source of bioactive compounds. Therefore, this work aimed to thoroughly characterise gut biomass from <em>Paracentrotus lividus</em> evaluating its bioactive potential. The gut biomass was evaluated in terms of bioactive capacity, and biochemical composition in both males and females. Although no statistical differences were found between sexes in any of these parameters, this study provided a proof of concept on the potential of sea urchin's gut, obtained as a co-product in the sea urchin industry, for feed supplementation. The gut biomass exhibited a high antioxidant capacity (IC₅₀ ≈ 0.5–1.0 mg_DW mL⁻¹ in four different assays) and bactericidal activity (IC₅₀ &lt; 1.0 mg_DW mL⁻¹ against <em>Vibrio parahaemolyticus</em>, <em>Edwardsiella tarda</em>, and <em>Tenacibaculum maritimum</em>). The gut co-product can also be used as a source of phenolic compounds, carotenoids, and PUFAs, with contents of 4.6 ± 0.4, 2.4 ± 0.8, and 93.0 ± 3.1 mg g_DW⁻¹, respectively. Overall, the sea urchin's gut seems a valuable product with a remarkable potential for use in aquafeeds as a source of bioactive compounds.</div></div>","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"36 ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57825041","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Portfolio of distribution maps for Octopus vulgaris off Mauritania","authors":"Verena Trenkel,&nbsp;Dedah Ahmed-Babou ,&nbsp;Hervé Demarcq ,&nbsp;Beyah Meissa ,&nbsp;Nicolas Bez","doi":"10.1051/alr/2023008","DOIUrl":"10.1051/alr/2023008","url":null,"abstract":"<div><div>This study introduces the concept of portfolios of distribution maps, which consist of the reduced set of empirical orthogonal maps that best explain spatial biomass distributions of a given species over time. The approach is demonstrated for the distributions of common octopus (<em>Octupus vulgaris</em>) off Mauritania over the last thirty years. The maps in the portfolio are the subset of empirical orthogonal maps that allowed to recover 60% of the spatiotemporal biomass distribution variance and whose temporal weights were significantly correlated with abundance. For octopus during the hot season, one single map explained half of the overall variance of the distribution data, while during the cold season, the portfolio of octopus distribution maps consisted of four maps, with the temporal weights of the second map being negatively correlated with upwelling intensity six months before. The size of each portfolio represents the number of distinct spatial patterns describing octopus spatial distributions. Assuming that specific but hidden processes explain each biomass spatial distribution of the portfolio, the size of a map portfolio might be interpreted as a proxy for system resilience. A small portfolio could reflect systems that are more fragile.</div></div>","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"36 ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57825106","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Review of the current situation, problems, and challenges in fish seed production and supply for Bangladesh's aquaculture development","authors":"Costas S Tsigenopoulos,&nbsp;Md. Rabiul Islam ,&nbsp;Olumide Samuel Olowe ,&nbsp;Shayla Sultana Mely ,&nbsp;Md. Amzad Hossain ,&nbsp;Mousumi Das ,&nbsp;Md. Farid Uz Zaman","doi":"10.1051/alr/2023028","DOIUrl":"10.1051/alr/2023028","url":null,"abstract":"<div><div>Fish seed are important for the growth of aquaculture in Bangladesh, but there are many challenges associated with supplying quality fish seed. This review evaluated the current level of production, issues and challenges that are affecting the production of fish seed in Bangladesh. The fish hatchery was found to be the major contributor in terms of fish seed production. Out of 671 metric tons of fish seed produced in 2020–2021, above 99% were from hatcheries. Freshwater finfish hatcheries have expanded over the last 30 yr, and are distributed throughout the country, but there is no commercial hatchery for coastal and marine water finfish species in the country. Shrimp and prawn hatcheries are concentrated in Cox's Bazar and the greater Jassore regions, respectively, while crab culture is entirely dependent on wild capture. Crablets are collected from nature, which has a devastating impact on biodiversity and wild stocks. The fish seed value chain is multidirectional and interlinked, and intermediaries dominate the supply chain. Disease outbreaks and indiscriminate use of chemicals are major concerns in fish seed production. Management strategies such as the introduction of certification, training programs, technology transfer, access to credit, and implementation of the law could improve the quality and productivity of fish seed in Bangladesh.</div></div>","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"36 ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143354081","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The European native oyster, Ostrea edulis, in Wales, a historical account of a forgotten fishery","authors":"Tom C. Cameron,&nbsp;Maria Hayden-Hughes ,&nbsp;Philippa Bayford ,&nbsp;Jonathan King ,&nbsp;David Smyth","doi":"10.1051/alr/2022024","DOIUrl":"10.1051/alr/2022024","url":null,"abstract":"<div><div>The history of the European native oyster has been documented for numerous countries within its natural range. However, the history of <em>Ostrea edulis</em> in Wales remains conspicuously absent from current UK and European peer-reviewed publications. It was therefore deemed necessary to address this and as a result in-depth research of archival data was conducted including local trade directories, decennial census returns, collections from the National Museum Wales, annual government fisheries reports and grey literature from local historical societies. These historical reviews resulted in the construction of a timeline which documents all the significant historical dates related to <em>O. edulis</em> in Wales from the early 1500 s to present day. Fisheries statistics for England and Wales were also analysed for the western regional oyster fisheries in an attempt to understand the contribution which the Welsh landings made to the region. The review revealed that the Welsh fishery was the primary contributor of regional landings from the early 1600 s with maximum landings reported 1894, with the oyster beds at Mumbles producing more oysters than any other port until the fishery closed in 1937. A commercial native oyster fishery no longer exists in Wales but there remains a small native oyster population in South Wales. It is hoped that the historical accounts of bountiful catches, overexploitation, and restoration of <em>O. edulis</em> over the centuries in Wales may offer current conservation practitioners an insight into failures and mistakes of the past which could benefit the future of the European flat oyster in Wales.</div></div>","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"36 ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57824487","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"The potential impact of human interventions at different scales in offshore wind farms to promote flat oyster (Ostrea edulis) reef development in the southern North Sea","authors":"Pauline Kamermans,&nbsp;Remment ter Hofstede ,&nbsp;Gregory Williams ,&nbsp;Mark van Koningsveld","doi":"10.1051/alr/2023001","DOIUrl":"10.1051/alr/2023001","url":null,"abstract":"<div><div>Incorporation of ecology and ecosystem services into marine infrastructural developments has gained interest over the last decades. Growing attention is given to combine the massive roll-out of offshore wind farms in the North Sea with reinstating the once rich but nowadays nearly extinct European flat oyster (<em>Ostrea edulis</em>). However, the practical upscaling of these pilots is hindered by the absence of clear management objectives and the lack of quantitative knowledge on the effect of technical interventions that could stimulate oyster reef development. Consequently, it is unclear what scale of intervention would actually be required to achieve overall management objectives. This paper presents a stepwise procedure designed in particular to guide the selection of appropriate measures and their required scale for pro-actively facilitating flat oyster reef development in offshore wind farms, in order to reach a desired state for oyster reef inclusive wind farms. The stepwise procedure addresses the historical and current situation of the physical system and social environment, provides options for intervention that stimulate oyster reef development at a range of scales, from micro-scale (materials used) to mega-scale (connectivity between wind farms), and quantitatively assesses the potential effect of applying these interventions. Assumptions have been made in quantifying the effort required for developing oyster reefs in offshore wind farms, and refinement is obviously needed. However, this is a first attempt to make such estimates. The outcomes provide direction in identifying research needs to fill knowledge gaps, as well as in decision-making during the design process for inducing oyster reef development in offshore wind farms. Herewith, application of the stepwise procedure supports authorities in restoration management for the successful reinstatement of flat oyster reefs in the southern North Sea.</div></div>","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"36 ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57824502","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impacts of COVID-19 on small-scale freshwater carp and coastal brackish water shrimp farming in India","authors":"Olivier Thebaud,&nbsp;Debesh Hait ,&nbsp;Murugesan Vignesh ,&nbsp;Shib Kinkar Das","doi":"10.1051/alr/2022020","DOIUrl":"10.1051/alr/2022020","url":null,"abstract":"<div><div>The present study was simultaneously conducted in two distantly located areas to assess the impacts of COVID-19 on farming processes, instantaneous financial impacts and mitigation strategies adopted by the farmers in the small scale freshwater carp farming and coastal brackish water shrimp farming sectors in India. Primary data were collected through interview of the farmers with the help of pre-tested structured interview schedules. Though the initial impact in both the sectors were substantial, freshwater carp farmers mitigated the crises comparatively well because of wider option in alternative livelihood, low cost locally available inputs, mobilization of local market, direct door to door vending of live fish and mobilization of women work force from the family in the farming sector. Untapped resource in the form of women's' participation in the freshwater farming practices was noteworthy during the pandemic period which increased polynomially (<em>y</em>  =  –1.0714<em>x</em>² + 7.5286<em>x</em> − 2.2; <em>R</em>² = 0.9648). As the shrimp farming sector was dependent upon external markets and burdened with high cost inputs primarily supplied by the input dealers on credit basis, the sector has to bear the burden most. Garret's Rank analysis revealed that integration with other production sectors ranked first as mitigation perception to the freshwater carp farmers, whereas, to the coastal shrimp farmers, the highest rank was with the perception that everything will be normalized within 2–3 months naturally. Garret's Rank analysis also revealed that in both the sectors, the farmers most important need was credit from the Govt. source in mitigating COVID-19 like crisis in future.</div></div>","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"36 ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57824873","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Fisheries and aquaculture products consumption in France: when the Covid-19 crisis did not lead to more sustainable purchases","authors":"Olivier Thebaud,&nbsp;Kilian Heutte ,&nbsp;Fabienne Daures ,&nbsp;Sterenn Lucas ,&nbsp;Sophie Girard ,&nbsp;Frédérique Alban ,&nbsp;Pascal Le Floc‘h","doi":"10.1051/alr/2023004","DOIUrl":"10.1051/alr/2023004","url":null,"abstract":"<div><div>In terms of food consumption, sustainability dimensions are often conflicting with purchasing power and practical purchases. France lands, farms, imports, and consumes large quantities of fisheries and aquaculture products (FAPs). The pandemic affected both domestic and foreign FAP supply through restrictions on trade and fishing conditions. Numerous sale points offering FAPs were closed during the pandemic. This general context has likely questioned the role of consumers on environmental, economic, and social matters. The aim of the paper is to assess whether the Covid-19 crisis has been an opportunity for French consumers to align their consumption at-home with the environmental issues by favouring domestic producers, short channels, or eco-friendly products. Quantitative data on at-home ordinary household purchases in metropolitan France from 2017 to 2021 was used along with t-test methods. It seems that fresh FAPs consumption did not truly adapt to the domestic fish production in defiance of import restrictions and available surpluses. While fresh shellfish at-home consumption did not change significantly in 2020, salmon and cod are still widely favoured by French consumers at-home, although their French production is virtually non-existent. On the contrary, domestically produced fish species remains poorly consumed at-home. The abundant supply of fresh salmon initially intended for other markets has permitted to consolidate the dominant position of this species on the French at-home consumption market. Initiated by supermarkets and hypermarkets and followed up by consumers, the trend of purchasing pre-packaged fresh fish has been substantially amplified by the pandemic and seems to persist over time.</div></div>","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"36 ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57824612","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Bonamia-free flat oyster (Ostrea edulis L.) seed for restoration projects: non-destructive screening of broodstock, hatchery production and test for Bonamia-tolerance","authors":"Tom C. Cameron,&nbsp;Pauline Kamermans ,&nbsp;Ainhoa Blanco ,&nbsp;Pim van Dalen ,&nbsp;Marc Engelsma ,&nbsp;Nienke Bakker ,&nbsp;Pascalle Jacobs ,&nbsp;Marco Dubbeldam ,&nbsp;Inés M. Sambade ,&nbsp;Manuel Vera ,&nbsp;Paulino Martinez","doi":"10.1051/alr/2023005","DOIUrl":"10.1051/alr/2023005","url":null,"abstract":"<div><div>Native (flat) oyster (<em>Ostrea edulis</em>) beds, once a major component of the North Sea, largely disappeared from the region in the late 19th century. Flat oyster restoration is taking place at a number of locations in the North Sea. When flat oyster beds are restored in areas where <em>O. edulis</em> is functionally extinct it is advised to treat these as disease-free areas. Adult oysters were collected in the Dutch Delta area which is infected with the pathogenic parasite <em>Bonamia ostreae</em>. The aim of this research was to obtain <em>Bonamia</em>-free seed from parents collected in a <em>Bonamia</em>-infected area. In addition, the oysters were analysed to identify candidate genomic regions related to bonamiosis tolerance and exposed to <em>Bonamia</em> in the field to assess survival compared to a naïve control group. With the aid of a non-destructive screening method, <em>Bonamia</em>-free broodstock were selected. These oysters produced <em>Bonamia</em>-free larvae and seed. For comparison, broodstock oysters were collected in the Dutch Wadden Sea, an area free of <em>Bonamia</em>. These oysters also produced <em>Bonamia</em>-free larvae and seed. To study if the Delta area oysters had developed a degree of resistance to the disease, while the naïve Wadden Sea oysters had not, seed of both groups was challenged in Lake Grevelingen where <em>Bonamia</em> occurs. Survival of the pre-selected <em>Bonamia</em>-free oysters was significantly higher than the naïve group. Samples of seed were analysed for association of candidate genetic markers related to bonamiosis tolerance. A higher percentage of individuals with tolerance-associated marker genotypes was found in the screened group compared to the naïve one. However, mortality of the naïve group could not be related to <em>Bonamia</em> presence. Further challenge tests are needed before firm conclusions regarding the genetic markers can be made. The results show that hatchery production of <em>Bonamia</em>-free and potentially <em>Bonamia</em>-tolerant flat oysters is possible.</div></div>","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"36 ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57824657","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Can Azolla filiculoides be a complementary feed resource for ecological intensification in small-scale fish farming? Biological effects on giant gourami (Osphronemus goramy)","authors":"Ryan B Carnegie,&nbsp;Domenico Caruso ,&nbsp;Angela Mariana Lusiastuti ,&nbsp;Simon Pouil ,&nbsp;Reza Samsudin ,&nbsp;Otong Zenal Arifin ,&nbsp;Jacques Slembrouck","doi":"10.1051/alr/2023007","DOIUrl":"10.1051/alr/2023007","url":null,"abstract":"<div><div>Using <em>Azolla</em> <em>filiculoides</em>, a candidate macrophyte species for ecological intensification, in small-scale aquaculture requires the investigation of the potential effects of fresh plant material not only on fish growth but also on physiological status and responses to disease and stress. In this study, juveniles of giant gourami <em>Osphronemus goramy</em> reared into cages placed in an outdoor pond were fed for six weeks with different proportions of fresh <em>Azolla</em> in replacement of commercial pellets (A: 100%, B: 56%, C:26% and D: 0% of the feeding events). The condition factor (<em>K</em>_Fulton) somatic and immunological indicators were measured. Effects of <em>Azolla</em> on transport stress and bacterial infection with <em>Aeromonas hydrophila</em> were also assessed. Results showed that <em>K</em>_Fulton decreased with increasing proportions of <em>Azolla</em> in the diet (<em>p</em> &lt; 0.001). Total protein, albumin and globulin in fish from treatment A were significantly lower than in the other treatments. A decrease in lymphocytes was observed in treatments A and B (<em>p</em> &lt; 0.001) and fish from these treatments had higher levels of monocytes (<em>p</em> &lt; 0.001). Neutrophils were higher in treatment A only (<em>p</em> = 0.012). Plasma lysozyme levels and serum bactericidal activity increased with <em>Azolla</em> in the diet (both <em>p</em> &lt; 0.001). Before transport stress, glycaemia was lower in fish from treatment A (<em>p</em> &lt; 0.001) while after transport, glycaemia increased in all treatments excepted treatment A (<em>p</em> &lt; 0.001) where survival was the highest after 15 days post transport. One week after infection the survival of fish was higher in fish from treatments A and B (<em>p</em> &lt; 0.001). <em>Azolla</em> had positive effects on immunological indicators, and resistance to stress and disease but decreased growth. These findings suggest using <em>Azolla</em> at reasonable rate (i.e. &lt;30% of the diet) to reduce pellets inputs while maintaining growth and providing other benefits to fish.</div></div>","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"36 ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57825096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Seagrass macroinvertebrate bycatches support mosquito net trawl fishery in Madagascar","authors":"François LE LOC'H ,&nbsp;Patricia A. Herinirina ,&nbsp;Lionel Bigot ,&nbsp;Patrick Frouin ,&nbsp;Huguette T.E Volandrae ,&nbsp;Roddy M. Randriatsara ,&nbsp;Faustinato Behivoke ,&nbsp;Lantoasinoro Ranivoarivelo ,&nbsp;Marc Léopold","doi":"10.1051/alr/2023014","DOIUrl":"10.1051/alr/2023014","url":null,"abstract":"<div><div>The use of mosquito nets, primarily for targeting small and/or juvenile fish, has rapidly increased in Western Indian Ocean shallow seagrass beds and coral reefs over the last 20 years. However, to date, invertebrate by-catch by locally-made fishing gear has not been reported. We studied the mosquito net trawl fishery in seagrass areas in the Bay of Toliara, Southwest Madagascar through the GPS tracking of fishers from August 2018 to February 2019. Catches were monitored through monthly landing surveys to characterize spatial temporal patterns in the abundance and diversity of macroinvertebrates in the seagrass beds. Fishing was carried out at low tide, mostly at night, by fishers pulling a hand-made trawl net of varying dimensions. Overall, 43 macroinvertebrate taxa were identified out of 217,080 individuals collected from 109 catch samples. Catches were generally composed of crustaceans (mainly Portunidae, Processidae, Penaeidae, and Alpheidae). The crab <em>Thalamita mitsiensis</em> largely dominated the abundance and biomass of the macroinvertebrate assemblage (from 6% to 100% and from 5 to 100% of the overall density and biomass, respectively). Macroinvertebrates composed 1.5% to 100% of the total catch per trip (i.e., 4–55 kg trip⁻¹). They were sold for human consumption or animal feed, which provided additional income to fishers (USD 1–24 trip⁻¹ and 1–72% of catch income per trip). This study revealed that macroinvertebrate resources provide valuable by-catch to small-scale fishers in Southwest Madagascar. This bycatch generates income that further encourages the use of mosquito net trawls and exacerbates their negative effects on coastal seagrass ecosystems and fisheries.</div></div>","PeriodicalId":55491,"journal":{"name":"Aquatic Living Resources","volume":"36 ","pages":""},"PeriodicalIF":1.5,"publicationDate":"2023-02-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"57825328","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}