Marine and Fishery Sciences (MAFIS)最新文献

{"title":"Relative abundance and use of elasmobranchs in artisanal fisheries of the Lesser Antilles","authors":"Camila Cáceres, Lauren Ali, Océane Beaufort, Welldon Mapp, Aljoscha Wothke, Bethan Roberts, Philip Matich, Michael Heithaus","doi":"10.47193/mafis.3812025010103","DOIUrl":"https://doi.org/10.47193/mafis.3812025010103","url":null,"abstract":"Shark and ray populations continue to decline in many regions around the world. The contribution of artisanal fisheries to these declines remains poorly understood for many locations. A rapid assessment framework using fisheries-independent sampling and fisher interviews was employed to study elasmobranch occurrence and use in coastal artisanal fisheries of Guadeloupe, Martinique, and Tobago. In-person interviews (n = 405) were conducted between June 2015-June 2017, and baited remote underwater video stations (BRUVS) (n = 50 video drops/reef) were deployed in nine reefs across the islands. The fate of elasmobranchs caught by artisanal fishers varied by island. Martinique reported the highest proportion of fishers keeping their catch for subsistence among the study locations. In Guadeloupe, fishers most frequently sold their catch, and Tobago fishers engaged in both subsistence fishing and sale. Fishers retained almost all animals caught and reported reduced catches of elasmobranch compared to when they started fishing. BRUVS revealed relatively low elasmobranch occurrence and a low Shannon diversity index compared to Caribbean nations with less fishing pressures on elasmobranchs. The present study highlights the need for improved data on, and monitoring of, artisanal fisheries.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"33 9","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141924943","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Status and characteristics of sharks and rays impacted by artisanal fisheries: potential implications for management and conservation","authors":"K. Osuka, M. Samoilys, Peter Musembi, Clare J. Thouless, Clay Obota, Joshua Rambahiniarison","doi":"10.47193/mafis.3812025010101","DOIUrl":"https://doi.org/10.47193/mafis.3812025010101","url":null,"abstract":"Artisanal fisheries in Kenya face substantial challenges, including inadequate enforcement, absence of tailored regulations for elasmobranch conservation and lack of robust data collection systems, hampering our understanding of fisheries and biological aspects of species. To address these challenges, this study examined the species composition, size, weight and number of shark and ray landings in three sites historically known for large catches of elasmobranchs. This research aimed to characterise Kenyan elasmobranchs fishery and exhibit its overlap with key habitats. Our findings are worrying since 79% of the landed fisheries species are categorised as threatened on the IUCN Red List. This includes the Critically Endangered scalloped hammerhead shark (Sphyrna lewini) and white-spotted guitarfish (Rhynchobatus djiddensis), both species frequently caught. Further, 97% of sharks and 46% of rays are landed as neonate and immature individuals. Urgent changes are imperative in national fisheries management to prevent the potential local disappearance of several shark and ray species. We recommend specific conservation measures to reduce the capture of threatened species and juveniles, such as banning the landing of threatened species and establishing minimum size limits. Enforcing fisheries regulations, such as mesh size, and prioritizing the protection of key habitats for the most at-risk species are essential proactive steps.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"34 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-07-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141800731","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Recirculating aquaculture systems affects hematological parameters and increases ectoparasite susceptibility in Nile tilapia Oreochromis niloticus","authors":"Rodrigo Stallbohm, M. S. Owatari, E. Zaniboni-Filho, M.L. Martins","doi":"10.47193/mafis.3742024010708","DOIUrl":"https://doi.org/10.47193/mafis.3742024010708","url":null,"abstract":"We herein evaluated the hematology and parasitology of Nile tilapia previously raised in an earthen pond and transferred to a recirculating aquaculture system (RAS) to verify any possible influence of RAS on such health parameters. For this, 780 tilapias with an initial average weight and length of 91.05 ± 27.08 g and 17.45 ± 1.91 cm, respectively, were distributed in three tanks (2.0 m3) attached to the RAS, where they remained for 54 d. Throughout the period, water quality parameters remained within the range suitable for the cultivation of the species. Tilapia growth performance was satisfactory in the RAS, reaching a final biomass of close to 300 kg and survival of 98%. Hematological and parasitological analyses at the end of 54 d showed possible stress in RAS, with a significant increase in neutrophils from 12.15 ± 6.66 (earthen pond) to 21.43 ± 11.68% (RAS) and erythrocytes from 1.81 ± 0.24 (earthen pond) to 2.13 ± 0.14 (RAS), and a significant decrease in lymphocytes from 22.4 ± 2.66 (earthen pond) to 13.67 ± 3.38 (RAS). Furthermore, parasitological analysis showed a significant increase in the number of parasitized fish (25% to 63%) and abundance (3.55 ± 6.44 to 9.37 ± 9.99) after 54 d. It was concluded that tilapia cultivation in RAS can cause hematological changes and increase parasitism.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":" 33","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140690916","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Women’s participation, challenges and problems encountered in major fish markets during the COVID-19 pandemic in Davao, Philippines","authors":"E. Macusi, Ivy M. Nallos, Charlen Mae G. Canales, M. J. Bersaldo, E. Macusi","doi":"10.47193/mafis.3742024010706","DOIUrl":"https://doi.org/10.47193/mafis.3742024010706","url":null,"abstract":"Women fish vendors actively participate in the fishery sector but they face various challenges regarding their financial capital and opportunities. There is a power imbalance within the market as men seem to dominate and women hold no power or voice to protect their rights. This study provides valuable insights regarding the perceptions and experiences of these women in the Davao region, by not only focusing on the role of women in fisheries and major fish markets in Mindanao, Philippines, but also on their contribution and the challenges they meet. We have conducted semi-structured field interviews with women fish vendors (n = 99) and in-depth follow-up interviews to validate the results (n = 80). Among respondents, 90% in Tagum, 80% in Panabo, and 75% in Davao City were vendors who did not own their stalls. Despite women’s active involvement in fish trading activities such as fish vending, fish brokering, and financing in the market, many of them do not have stalls on their own. It was found that women participate in the fish marketing sector because they received previous training from family members involved in the business (29%), or they wanted a well-paying job (19%), or it was their only economic opportunity (14%). Another reason was profitability (9%) to support their families (9%) and children (8%). Common problems encountered by women in the fish market included a decline in customers (40%), work exhaustion due to the combination of their market and domestic duties (14%), and rude customers and employers (10%). In addition, women also reported challenges regarding mobile vendors (9%), low fish prices (8%), and not having access to financial credit (8%). Many of the women support their husbands by providing additional income for their families. Overall, women fish vendors play a critical role in the local economy of their villages and families. This implies that greater support is needed for women to have financial access to fishing businesses and become beneficiaries of training and livelihood development programs while helping their families overcome food insecurity and poverty.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"55 48","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140701220","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Occurrence of the Blue button Porpita porpita along the Italian Ionian and Tyrrhenian coasts","authors":"Antonio O. Lillo, Gianvito D'Orlando, Giovanna Filippo, Antonella D'Amore, Salvatore Longo, Achille Palma, Teresa Trabace","doi":"10.47193/mafis.3742024010707","DOIUrl":"https://doi.org/10.47193/mafis.3742024010707","url":null,"abstract":"New individuals of Porpita porpita were detected along the Italian coasts of the Mediterranean Sea. In recent years, due to warming Mediterranean waters, the species has spread even further. This observation opens new horizons for further reports of this species in the Ionian and Tyrrhenian Seas of Italy.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"101 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140713660","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Identifying vulnerable marine ecosystems from imagery in the Uruguayan continental shelf","authors":"Alvar Carranza, Pablo Limóngi, Rodrigo Gurdek-Bas, Agustín Loureiro, Hernán Pérez Orsi, Aitor Azcárate, Sofia Santos, Pablo Muniz","doi":"10.47193/mafis.3742024010705","DOIUrl":"https://doi.org/10.47193/mafis.3742024010705","url":null,"abstract":"Scientific surveys employing remotely operated vehicles (ROVs) provide valuable imagery for identifying Vulnerable Marine Ecosystems (VMEs). However, there is presently no established framework for distinguishing VMEs from these images. While existing guidelines effectively address certain habitat types, such as scleractinian reefs, dense octocoral gardens, and chemosynthetic ecosystems, achieving consensus becomes more challenging for other habitats. Our investigation centered on two key localized rocky outcrops on the Uruguayan shelf, conducting ROV dives to explore these environments. This study aims to evaluate initial global consensus guidelines for VME identification from imagery and discuss the suitability of these criteria, and report the existence of Hard Bottom Soft Coral Gardens and Sponge associations in the inner Uruguayan shelf. Recognizing these habitats is of utmost importance for the Uruguayan government, which has expressed the intent to safeguard ecologically representative and well-connected systems crucial for marine biodiversity.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"243 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-04-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140746524","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"A diagnosis of the artisanal fishery landings in the Colombian Caribbean coast by means of indicators","authors":"Camilo B. García, Luis O. Duarte","doi":"10.47193/mafis.3722024010504","DOIUrl":"https://doi.org/10.47193/mafis.3722024010504","url":null,"abstract":"Landings of the artisanal fishery in the Colombian Caribbean from 2013 to 2021 were characterized by means of two indicators: the trophic level and the vulnerability to fishery landings. Indicators showed a statistically significant decreasing trend in vulnerability and trophic level, suggesting that the fishery is increasingly targeting species of low vulnerability and trophic level, thus moving down the food web. The overall pattern of indicators was not uniform in space. Incidence interaction of gears and species landed explained the trajectory of indicators at the scale of Departments. Fishing gears targeted different levels in the food web, with gillnets responsible for the bulk of landings. Compared to a previous study, the group of fish species supporting most of landings has changed towards species with lower vulnerability, i.e. resistant to fishing mortality due to their evolved life-history but still of predatory habits in general. A notable exception is Mugil incilis, a species with a low trophic level that has become third in importance of landings in the database.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":" 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138962995","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of ports construction activities on structure, composition and diversity of fish population: case study of Tema, Ghana","authors":"S. Amponsah, F. Nunoo, Angela E. Lamptey, P. Ofori-Danson, Ayaa Armah","doi":"10.47193/mafis.3722024010502","DOIUrl":"https://doi.org/10.47193/mafis.3722024010502","url":null,"abstract":"Ports offer economic progress to many coastal developing countries. In view of the economic importance, the rising demand for maritime benefits requires the expansion of existing ports. However, marine ecosystems may become vulnerable to negative impact from the construction of these maritime structures. Therefore, the aim of the study was to establish the impact of Tema port expansion on the diversity and population structure of fish species. Data were collected quarterly from June 2018 to November 2021 through trawling fishing activities off the coast of Greater Accra, Ghana, and subsequently analysed using Primer 6 software. Sampling locations along the coast of Greater Accra included Vernon Bank (VNB), Disposal area (DSA) and Offshore Sakumono (OSK). The increased and reduced number of species at VNB and DSA, respectively, could be alluded to dredging and disposal of dredged spoils. Diversity indices at OSK site was higher than those observed in disturbed areas due to the absence of impact in this control area. Thus, it is recommended to conduct further studies on the assemblage of invasive species that migrated to the VNB during dredging activities, since these species can have severe economic impact on fishing activities of artisanal fishermen, especially at the local level.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"52 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139010225","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"First DNA barcoding-based record of Lysiosquilla maculata (Crustacea: Stomatopoda) from Chennai coast, Tamil Nadu, India","authors":"Chelliah Babu, Krishnan Silambarasan, Antony P. Anrose, Antony P. Tiburtius","doi":"10.47193/mafis.3722024010503","DOIUrl":"https://doi.org/10.47193/mafis.3722024010503","url":null,"abstract":"The taxonomic identification of mantis shrimp Lysiosquilla maculata was performed through DNA barcoding analysis of specimens collected from the Kasimedu fishing port, Chennai coast, Tamil Nadu, India. The mitochondrial cytochrome oxidase subunit I (mtCOI) gene with a region of 650 bp was sequenced for phylogenetic analysis. In the present record, mitochondrial gene sequences were used to identify the mantis shrimp. This is the first confirmed DNA barcoding record from Indian waters, whose mtCOI sequence was deposited in GenBank. The Neighbor-joining method was used for phylogenetic analysis. The calculated pairwise genetic distance with five closely related species ranged from 0.01 to 0.094%. The morphological and molecular analysis confirm that the specimens collected correspond to L. maculata.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"101 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-12-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138599950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of artificial light at night on the mobility of the sea urchin Paracentrotus lividus","authors":"Davide Di Bari","doi":"10.47193/mafis.3712024010106","DOIUrl":"https://doi.org/10.47193/mafis.3712024010106","url":null,"abstract":"Light pollution poses a significant global threat to biodiversity, driven by the increasing coastal urbanization and the resulting growth of artificial light at night (ALAN). However, to date, the scientific community has focused mainly on studying its ecological effects within the terrestrial environment. It is only recently that attention has turned to coastal marine systems which are crucial due to their essential contribution at the ecosystem level. These environments, characterized by their high productivity, also play a crucial role in protecting coasts against erosion. The aim of this case study was to investigate the possible effects of ALAN on the sea urchin species Paracentrotus lividus in four areas of an Italian rocky coast, selected according to a gradient of light intensity (0, 0.4, 3 and 25 lux), from April 2022 to February 2023. Effects of ALAN were examined by measuring the density and size of sea urchins and also their reactivity to a stress condition through an innovative technique of overturning sea urchins to study their physiological response in the presence or absence of artificial light. In addition, the permanence of sea urchins in the four areas was evaluated through an efficient tagging test. Results show how these organisms, typically nocturnal, suffer negative effects of ALAN in terms of minor density and mobility, expressed as the speed of response to an adverse event, compared to a dark area.","PeriodicalId":112376,"journal":{"name":"Marine and Fishery Sciences (MAFIS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123685113","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}