Octopuses are an important fishery resource in the Ryukyu Archipelago, Japan, and Octopus cyanea is an important fishery resource in this region. Although a gradual downward trend in catches of O. cyanea in the Ryukyu Archipelago has been reported, no study has focused on the connectivity and genetic structure, which are important parameters for conservation strategies. We used partial sequences of mitochondrial COI and MIG-seq, which can efficiently obtain single nucleotide polymorphism (SNPs) to evaluate genetic diversity and patterns of gene flow among three populations of O. cyanea in the Ryukyu Archipelago. We combined population genetic analyses with biophysical approaches to understand larval dispersal patterns and the regional connectivity. Although there was a tendency for the Yaeyama population to become isolated from the Okinawa-jima populations, high genetic diversity was maintained overall, indicating frequent genetic exchange between populations. Population genetic analyses combined with larval dispersal simulations revealed that the contemporary migration of O. cyanea is asymmetric patterns among the three populations, suggesting that western coast of Okinawa-jima Island functions as a source population among the three populations we examined. The potential implications of this study on the conservation management of O. cyanea were discussed, namely that future population assessment approaches are needed to include western coast of Okinawa-jima populations. In addition, this study indicates that at least two different management units should be considered. This study is the first population genetic study of O. cyanea in the Ryukyu Archipelago and provides fundamental information on the genetic population structure of this species in this region.
八爪鱼是日本琉球群岛的重要渔业资源，而八爪鱼（Octopus cyanea）是该地区的重要渔业资源。虽然有报道称琉球群岛的八爪鱼渔获量呈逐渐下降趋势，但还没有研究重点关注八爪鱼的连通性和遗传结构，而这正是保护战略的重要参数。我们利用线粒体 COI 部分序列和 MIG-seq（可有效获得单核苷酸多态性 (SNP)）评估了琉球群岛 O. cyanea 三个种群之间的遗传多样性和基因流动模式。我们将种群遗传分析与生物物理方法相结合，以了解幼虫扩散模式和区域连通性。虽然八重山种群有与冲绳岛种群隔离的趋势，但总体上保持了较高的遗传多样性，表明种群间的遗传交流频繁。种群遗传分析结合幼虫扩散模拟显示，O. cyanea在三个种群之间的当代迁移模式是不对称的，这表明冲绳岛西海岸在我们研究的三个种群中发挥着源头种群的作用。本研究还讨论了对 O. cyanea 保护管理的潜在影响，即未来的种群评估方法需要包括冲绳岛西海岸种群。此外，本研究还表明至少应考虑两个不同的管理单位。本研究是首次对琉球群岛的 O. cyanea 进行种群遗传研究，为该地区该物种的遗传种群结构提供了基本信息。
{"title":"Population structure and genetic connectivity of the big blue octopus Octopus cyanea in the Ryukyu Archipelago, Japan","authors":"Hiroki Kise, Naoki Saito, Kodai Gibu, Masaki Asato, Tomohiro Kita, Kenta Matsuzaki, Akira Iguchi","doi":"10.1002/aqc.4153","DOIUrl":"https://doi.org/10.1002/aqc.4153","url":null,"abstract":"<p>Octopuses are an important fishery resource in the Ryukyu Archipelago, Japan, and <i>Octopus cyanea</i> is an important fishery resource in this region. Although a gradual downward trend in catches of <i>O. cyanea</i> in the Ryukyu Archipelago has been reported, no study has focused on the connectivity and genetic structure, which are important parameters for conservation strategies. We used partial sequences of mitochondrial COI and MIG-seq, which can efficiently obtain single nucleotide polymorphism (SNPs) to evaluate genetic diversity and patterns of gene flow among three populations of <i>O. cyanea</i> in the Ryukyu Archipelago. We combined population genetic analyses with biophysical approaches to understand larval dispersal patterns and the regional connectivity. Although there was a tendency for the Yaeyama population to become isolated from the Okinawa-jima populations, high genetic diversity was maintained overall, indicating frequent genetic exchange between populations. Population genetic analyses combined with larval dispersal simulations revealed that the contemporary migration of <i>O. cyanea</i> is asymmetric patterns among the three populations, suggesting that western coast of Okinawa-jima Island functions as a source population among the three populations we examined. The potential implications of this study on the conservation management of <i>O. cyanea</i> were discussed, namely that future population assessment approaches are needed to include western coast of Okinawa-jima populations. In addition, this study indicates that at least two different management units should be considered. This study is the first population genetic study of <i>O. cyanea</i> in the Ryukyu Archipelago and provides fundamental information on the genetic population structure of this species in this region.</p>","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 5","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141078930","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Estimating the potential distribution range of the invasive South American suckermouth armoured catfishes Pterygoplichthys spp. in the Indo-Burma biodiversity hotspot using MaxEnt","authors":"S.M. Marr, J. Patoka, D.D. Zworykin","doi":"10.1002/aqc.4173","DOIUrl":"https://doi.org/10.1002/aqc.4173","url":null,"abstract":"<p>\u0000 </p>","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 5","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141078929","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Smrutisikha Mohanty, Prem C. Pandey, Prachi Singh, Vikas Dugesar, Prashant K. Srivastava
{"title":"Vegetation discrimination based on chlorophyll prediction in Marshy wetland using Unmanned Aerial Vehicles","authors":"Smrutisikha Mohanty, Prem C. Pandey, Prachi Singh, Vikas Dugesar, Prashant K. Srivastava","doi":"10.1002/aqc.4170","DOIUrl":"https://doi.org/10.1002/aqc.4170","url":null,"abstract":"<p>\u0000 </p>","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 5","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141078931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Patterns in abundance, size and space-use of Giant Mud Crab (Scylla serrata) in a temperate marine protected area","authors":"Daniel E. Hewitt, Daniel D. Johnson, Luke Erskine, David Harasti, Iain M. Suthers, Matthew D. Taylor","doi":"10.1002/aqc.4167","DOIUrl":"10.1002/aqc.4167","url":null,"abstract":"<p>\u0000 \u0000 </p>","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 5","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aqc.4167","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141060686","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Myllena Lima, Frederico F. Salles, André Felipe A. de Andrade, Karina Dias-Silva, Leandro Juen, Leandro Schlemmer Brasil
{"title":"Linnean and Wallacean shortfalls of Leptophlebiidae (Ephemeroptera: Insecta) in the Brazilian Amazon","authors":"Myllena Lima, Frederico F. Salles, André Felipe A. de Andrade, Karina Dias-Silva, Leandro Juen, Leandro Schlemmer Brasil","doi":"10.1002/aqc.4163","DOIUrl":"https://doi.org/10.1002/aqc.4163","url":null,"abstract":"<p>\u0000 </p>","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 5","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140953078","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Megan Maroen, Mary Rowlinson, Conrad Matthee, Sara Andreotti
{"title":"The effectiveness of the semi-automated Identifin software to accurately fast-track dorsal fin photographic identifications of sharks","authors":"Megan Maroen, Mary Rowlinson, Conrad Matthee, Sara Andreotti","doi":"10.1002/aqc.4159","DOIUrl":"https://doi.org/10.1002/aqc.4159","url":null,"abstract":"<p>\u0000 </p>","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 5","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aqc.4159","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140952720","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Deisiane Oliveira, Erika C. Rocha, Gisele Y. Kawauchi, Leticia Curvelo Franco, Rômulo Barroso, Wagner F. Magalhães
{"title":"Peanut worms as unreported fishery resources in Brazil","authors":"Deisiane Oliveira, Erika C. Rocha, Gisele Y. Kawauchi, Leticia Curvelo Franco, Rômulo Barroso, Wagner F. Magalhães","doi":"10.1002/aqc.4169","DOIUrl":"https://doi.org/10.1002/aqc.4169","url":null,"abstract":"","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 5","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140949136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Small-scale fisheries ensure food security and employment in Angolan coastal communities. These dynamic, widespread fisheries remain mostly unregulated, with limited data available despite their likely significant impact on marine megafauna. We used an interview-based survey to investigate local fisher interactions with elasmobranchs (sharks and rays) and gather information on utilization, trade and perceptions. All fishers (n = 83) landed elasmobranchs. Most fishers considered sharks as bycatch (74.7%, n = 62), while 100% targeted rays (Order Myliobatiformes), and 62.8% (n = 52) targeted guitarfishes (Order Rhinopristiformes). Over 80% of fishers reported declining catches and sizes of elasmobranchs over the last 30 years, raising concerns about the sustainability of these fisheries. Utilization and trade routes varied depending on elasmobranch products, with exports to China (fins) and local market sales (meat). Specifically, 8.4% (n = 5) of fishers confirmed meat and fin exports to China (4.8%, n = 3). The protection of sharks was considered by 32.5% (n = 30) of respondents, while 21.7% (n = 18) believed only certain shark species should be protected. Most respondents reported that rays (80.5%, n = 67) and guitarfishes (61%, n = 51) should not be protected. Regarding the ban on fishing, none considered it for ray species, with only 6.1% (n = 5) supporting this idea for guitarfishes. We highlight the lack of elasmobranch-specific conservation measures and the need for a multi-pronged approach to inform policy. Considering the scale of these fisheries, management actions need to be urgently developed and implemented to ensure the sustainability of elasmobranch fisheries while securing the livelihoods of coastal communities.
{"title":"Fisher perceptions of catch and trade of sharks and rays in Angolan small-scale fisheries","authors":"Ana Lúcia Furtado Soares, Rima W. Jabado","doi":"10.1002/aqc.4168","DOIUrl":"https://doi.org/10.1002/aqc.4168","url":null,"abstract":"<p>Small-scale fisheries ensure food security and employment in Angolan coastal communities. These dynamic, widespread fisheries remain mostly unregulated, with limited data available despite their likely significant impact on marine megafauna. We used an interview-based survey to investigate local fisher interactions with elasmobranchs (sharks and rays) and gather information on utilization, trade and perceptions. All fishers (<i>n</i> = 83) landed elasmobranchs. Most fishers considered sharks as bycatch (74.7%, <i>n</i> = 62), while 100% targeted rays (Order Myliobatiformes), and 62.8% (<i>n</i> = 52) targeted guitarfishes (Order Rhinopristiformes). Over 80% of fishers reported declining catches and sizes of elasmobranchs over the last 30 years, raising concerns about the sustainability of these fisheries. Utilization and trade routes varied depending on elasmobranch products, with exports to China (fins) and local market sales (meat). Specifically, 8.4% (<i>n</i> = 5) of fishers confirmed meat and fin exports to China (4.8%, <i>n</i> = 3). The protection of sharks was considered by 32.5% (<i>n</i> = 30) of respondents, while 21.7% (<i>n</i> = 18) believed only certain shark species should be protected. Most respondents reported that rays (80.5%, <i>n</i> = 67) and guitarfishes (61%, <i>n</i> = 51) should not be protected. Regarding the ban on fishing, none considered it for ray species, with only 6.1% (<i>n</i> = 5) supporting this idea for guitarfishes. We highlight the lack of elasmobranch-specific conservation measures and the need for a multi-pronged approach to inform policy. Considering the scale of these fisheries, management actions need to be urgently developed and implemented to ensure the sustainability of elasmobranch fisheries while securing the livelihoods of coastal communities.</p>","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 5","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aqc.4168","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140924822","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
<p>Effective marine monitoring and conservation efforts are urgently needed because anthropogenic pressures such as overfishing, habitat damage, pollution and invasive species are increasing (Laffoley et al., <span>2022</span>). Public engagement activities can enhance marine monitoring efforts, providing valuable observations and increasing ocean literacy in society (Boaventura et al., <span>2021</span>). Sharing knowledge about marine wildlife in accessible ways, such as digital media and at interactive workshops, can greatly increase the involvement of people in protecting their local environment. Marine citizen science is growing globally (Garcia-Soto et al., <span>2021</span>; Kelly et al., <span>2020</span>) ranging from specific environmental issues (e.g. plastic pollution; Rambonnet et al., <span>2019</span>), habitat protection (e.g. seagrass meadows; Smale et al., <span>2019</span>) or a focus on certain taxa (such as seaweeds; Brodie et al., <span>2023</span>).</p><p>Most UK marine citizen science initiatives have been driven by non-governmental organizations (Garcia-Soto et al., <span>2021</span>). Examples include <i>Project Seagrass</i>, a Welsh University-led organization that combines research, public involvement and outreach activities to share seagrass knowledge and restore seagrass meadows (www.projectseagrass.org). More than 800,000 habitat and species observations have been reported to the UK National Biodiversity Network by <i>Seasearch</i>. This group of SCUBA divers and snorkelers are trained by the Marine Conservation Society and have been collecting data for marine conservation since 1988, greatly expanding the known distribution of maerl (www.seasearch.org.uk). Seasearch maerl data were used to inform the design of a network of Special Areas of Conservation (SAC) and Marine Protected Areas (MPAs). Seasearch continues to build a database with maerl distribution records to inform future conservation and management initiatives and is working with Natural England to help improving maerl habitat classification (Angus Jackson, pers. comm.).</p><p>Maerl is a seabed habitat made up of coralline algae thalli that grow unattached to substrata (Figure 1). Maerl habitats occur worldwide and have high ecological, socio-economic and cultural value but are far less well known or studied than habitats such as coral reefs, kelp forests or seagrass beds (Tuya et al., <span>2023</span>). This habitat harbours high biodiversity and provides nursery areas for commercially valuable species such as cod and scallops and spawning areas for herring (Hall-Spencer, <span>2023</span>).</p><p>Scottish Natural Heritage (now called NatureScot; www.nature.scot) funded a workshop which drew together researchers from Europe and North and South America (Donnan & Moore, <span>2003</span>) who noted that maerl is particularly sensitive to physical disturbance such as towed demersal gear impacts, it is now known to also be sensitive to fish farm wastes (
{"title":"The importance of public engagement for maerl conservation: Insights from Scotland","authors":"Jason M. Hall-Spencer, Lina M. Rasmusson","doi":"10.1002/aqc.4162","DOIUrl":"https://doi.org/10.1002/aqc.4162","url":null,"abstract":"<p>Effective marine monitoring and conservation efforts are urgently needed because anthropogenic pressures such as overfishing, habitat damage, pollution and invasive species are increasing (Laffoley et al., <span>2022</span>). Public engagement activities can enhance marine monitoring efforts, providing valuable observations and increasing ocean literacy in society (Boaventura et al., <span>2021</span>). Sharing knowledge about marine wildlife in accessible ways, such as digital media and at interactive workshops, can greatly increase the involvement of people in protecting their local environment. Marine citizen science is growing globally (Garcia-Soto et al., <span>2021</span>; Kelly et al., <span>2020</span>) ranging from specific environmental issues (e.g. plastic pollution; Rambonnet et al., <span>2019</span>), habitat protection (e.g. seagrass meadows; Smale et al., <span>2019</span>) or a focus on certain taxa (such as seaweeds; Brodie et al., <span>2023</span>).</p><p>Most UK marine citizen science initiatives have been driven by non-governmental organizations (Garcia-Soto et al., <span>2021</span>). Examples include <i>Project Seagrass</i>, a Welsh University-led organization that combines research, public involvement and outreach activities to share seagrass knowledge and restore seagrass meadows (www.projectseagrass.org). More than 800,000 habitat and species observations have been reported to the UK National Biodiversity Network by <i>Seasearch</i>. This group of SCUBA divers and snorkelers are trained by the Marine Conservation Society and have been collecting data for marine conservation since 1988, greatly expanding the known distribution of maerl (www.seasearch.org.uk). Seasearch maerl data were used to inform the design of a network of Special Areas of Conservation (SAC) and Marine Protected Areas (MPAs). Seasearch continues to build a database with maerl distribution records to inform future conservation and management initiatives and is working with Natural England to help improving maerl habitat classification (Angus Jackson, pers. comm.).</p><p>Maerl is a seabed habitat made up of coralline algae thalli that grow unattached to substrata (Figure 1). Maerl habitats occur worldwide and have high ecological, socio-economic and cultural value but are far less well known or studied than habitats such as coral reefs, kelp forests or seagrass beds (Tuya et al., <span>2023</span>). This habitat harbours high biodiversity and provides nursery areas for commercially valuable species such as cod and scallops and spawning areas for herring (Hall-Spencer, <span>2023</span>).</p><p>Scottish Natural Heritage (now called NatureScot; www.nature.scot) funded a workshop which drew together researchers from Europe and North and South America (Donnan & Moore, <span>2003</span>) who noted that maerl is particularly sensitive to physical disturbance such as towed demersal gear impacts, it is now known to also be sensitive to fish farm wastes (","PeriodicalId":55493,"journal":{"name":"Aquatic Conservation-Marine and Freshwater Ecosystems","volume":"34 5","pages":""},"PeriodicalIF":2.4,"publicationDate":"2024-05-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/aqc.4162","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140924823","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":3,"RegionCategory":"环境科学与生态学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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