1
|
Higueruelo A, Santín A, Salazar J, Ambroso S, Soler-Membrives A, Grinyó J. Coexistence of megabenthic assemblages and artisanal fishers: The case of Cap de Creus Marine Protected Area (North-Western Mediterranean Sea). Mar Environ Res 2023; 192:106211. [PMID: 37801780 DOI: 10.1016/j.marenvres.2023.106211] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 09/14/2023] [Accepted: 09/26/2023] [Indexed: 10/08/2023]
Abstract
Artisanal fisheries, although considered less harmful, can still endanger marine ecosystems, especially in areas with long-standing tradition. In Cap de Creus, where artisanal fisheries has likely occurred for centuries, the status of benthic communities in fishing grounds was poorly understood. Through collaboration with local fishers, the benthic assemblages in three artisanal fishing grounds within Cap de Creus Marine Protected Area (MPA) were studied. Using video transects recorded by a remotely operated vehicle (ROV), the diversity and distribution of species were analysed in relation to substrate type, slope, and depth. The study also assessed the impacts on these communities by examining marine litter, lost fishing gear, and the condition of gorgonian populations. The findings identified three megabenthic assemblages and revealed higher fishing pressure and impact in the Maça d'Oros area, likely due to multiple fishing guilds converging. However, the study demonstrated lower impact in MPAs compared to unprotected Mediterranean areas, highlighting the importance of coastal management.
Collapse
Affiliation(s)
- A Higueruelo
- Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, 08193, Barcelona, Spain.
| | - A Santín
- Institut de Ciències Del Mar (ICM-CSIC), Passeig Marítim de La Barceloneta, 37-49, 08003, Barcelona, Catalonia, Spain; CIIMAR - Interdisciplinary Centre of Marine and Environmental Research, University of Porto, Matosinhos, Portugal
| | - J Salazar
- Institut de Ciències Del Mar (ICM-CSIC), Passeig Marítim de La Barceloneta, 37-49, 08003, Barcelona, Catalonia, Spain; Programa de Ciències Del Mar, Facultat de Ciències de La Terra, Universitat de Barcelona, Av. Diagonal, 643, 08028, Barcelona, Spain
| | - S Ambroso
- Departament de Biologia Evolutiva, Ecologia I Ciències Ambientals, Universitat de Barcelona, Av. Diagonal, 643, 08028, Barcelona, Spain
| | - A Soler-Membrives
- Departament de Biologia Animal, de Biologia Vegetal i d'Ecologia, Universitat Autònoma de Barcelona, Cerdanyola Del Vallès, 08193, Barcelona, Spain
| | - J Grinyó
- Department of Ocean Systems, Royal Netherlands Institute for Sea Research (NIOZ), Den Burg, Netherlands
| |
Collapse
|
2
|
Menéndez Delgado ER, Castillo Ruperti RJ, Zambrano Yépez CA, Cedeño Marcillo GM. Environmental aspects and management preferences: A case study of small pelagic fisheries in the Crucita parish of the Portoviejo canton. Heliyon 2023; 9:e17858. [PMID: 37456017 PMCID: PMC10339012 DOI: 10.1016/j.heliyon.2023.e17858] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/06/2023] [Revised: 06/28/2023] [Accepted: 06/29/2023] [Indexed: 07/18/2023] Open
Abstract
The extractive context of artisanal fishing in Ecuador is very broad and diverse considering the different fishing equipment that is used to capture a very varied set of species. As part of this broad sector, there is a small pelagic fishery, which is in the Crucita parish of the Portoviejo canton and is a long-standing and economically very relevant resource for the community. The objective of this article is to analyze the environmental and management aspects of this fishery as aspects relevant to achieving sustainable exploitation. To this end, information was collected from the beneficiaries of the purse-seine fishing fleet with the use of a structured questionnaire. The results revealed that there is widespread ignorance of the environmental aspects that affect the conservation of ecosystems and marine bioresources. On the other hand, the fishermen are aware of a general need to implement management measures that guarantee the sustainability of their fishing. However, they consider that the current regulations are not adapted to the current local context. Finally, from the perspective of those involved, the implementation of minimum capture sizes as a management measure could guarantee the sustainable capture of the species.
Collapse
Affiliation(s)
- Erick Rodolfo Menéndez Delgado
- Facultad de Ciencias Administrativas, Contables y Comercio, Universidad Laica Eloy Alfaro de Manabí, Km 1 ½ vía Manta, San Mateo, Manta, Manabí, Ecuador
| | - Ricardo Javier Castillo Ruperti
- Facultad de Ciencias de la Vida y Tecnologías, Universidad Laica Eloy Alfaro de Manabí, Km 1 ½ vía Manta, San Mateo, Manta, Manabí, Ecuador
| | - Claudia Alexandra Zambrano Yépez
- Facultad de Ciencias Sociales, Derecho y Bienestar, Universidad Laica Eloy Alfaro de Manabí, Km 1 ½ vía Manta, San Mateo, Manta, Manabí, Ecuador
| | - Gladys Mirella Cedeño Marcillo
- Facultad de Ciencias Administrativas, Contables y Comercio, Universidad Laica Eloy Alfaro de Manabí, Km 1 ½ vía Manta, San Mateo, Manta, Manabí, Ecuador
| |
Collapse
|
3
|
Ronda AC, Menéndez MC, Tombesi N, Álvarez M, Tomba JP, Silva LI, Arias AH. Microplastic levels on sandy beaches: Are the effects of tourism and coastal recreation really important? Chemosphere 2023; 316:137842. [PMID: 36640983 DOI: 10.1016/j.chemosphere.2023.137842] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/30/2022] [Revised: 11/23/2022] [Accepted: 01/10/2023] [Indexed: 06/17/2023]
Abstract
This study assessed the effect of tourism and other recreational activities on microplastic (MP) levels and their characteristics in the sand and surf zone of the seawater. Six sites were chosen belonging to three sandy beaches with similar geomorphologic and morphodynamic characteristics but with different tourism activities. On average, a concentration of 1133.3 ± 811.3 items/kg dry weight (d.w.) and 12.7 ± 14.9 items/m3 were found in the sand and seawater samples, respectively. Fibers and films predominated and were less than 1 mm in length. In the sand, the films mainly matched the PE polymer spectra and the fibers matched PET polymer, cotton, and indigo blue dye; in the seawater samples, PP films and PET fibers prevailed. At the Pehuén-Co - Monte Hermoso Coastal Marine MPA where the flow of tourists is low, the MP levels were the lowest and the largest particles were found, mainly blue or black fibers, with less polymer diversity, cotton and PET being the most prevalent suggesting a recent input of textile fibers to this site. Moreover, the highest concentration of MPs was found on the southern site of a beach considered to be more pristine due to negligible human activity, including the smallest size pattern, mostly composed of white films or fibers with a greater diversity of polymers, predominantly PE > PET > PP. A great occurrence of PVC white films was also found in the surf zone at this site. Proximity to the mouth of a river, littoral drift, and other point sources were identified as the main sources, indicating that, apart from the local tourism and recreational activities, other sources might play a major role in the input of MPs to sandy beaches, such as extensive/intensive agricultural land use and irrigation areas.
Collapse
Affiliation(s)
- Ana Carolina Ronda
- Instituto Argentino de Oceanografía (IADO-CONICET/UNS), CCT-CONICET Bahía Blanca, Camino La Carrindanga km 7.5, 8000, Bahía Blanca, Argentina; Departamento de Biología, Bioquímica y Farmacia, Universidad Nacional del Sur (UNS), Av. Alem 1253, 8000, Bahía Blanca, Argentina
| | - María Clara Menéndez
- Instituto Argentino de Oceanografía (IADO-CONICET/UNS), CCT-CONICET Bahía Blanca, Camino La Carrindanga km 7.5, 8000, Bahía Blanca, Argentina
| | - Norma Tombesi
- Departamento de Química, Universidad Nacional del Sur (UNS), Av. Alem 1253, 8000 Bahía Blanca, Argentina; Instituto de Química del Sur (INQUISUR - CONICET/UNS), Av. Alem 1253, 8000 Bahía Blanca, Argentina
| | - Mónica Álvarez
- Departamento de Química, Universidad Nacional del Sur (UNS), Av. Alem 1253, 8000 Bahía Blanca, Argentina; Instituto de Química del Sur (INQUISUR - CONICET/UNS), Av. Alem 1253, 8000 Bahía Blanca, Argentina
| | - Juan Pablo Tomba
- Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), Universidad Nacional de Mar del Plata (UNMP)-CONICET, Av. Colón 10850, 7600, Mar del Plata, Argentina
| | - Leonel Ignacio Silva
- Instituto de Investigaciones en Ciencia y Tecnología de Materiales (INTEMA), Universidad Nacional de Mar del Plata (UNMP)-CONICET, Av. Colón 10850, 7600, Mar del Plata, Argentina
| | - Andrés Hugo Arias
- Instituto Argentino de Oceanografía (IADO-CONICET/UNS), CCT-CONICET Bahía Blanca, Camino La Carrindanga km 7.5, 8000, Bahía Blanca, Argentina; Departamento de Química, Universidad Nacional del Sur (UNS), Av. Alem 1253, 8000 Bahía Blanca, Argentina.
| |
Collapse
|
4
|
Ayilu RK, Fabinyi M, Barclay K, Bawa MA. Blue economy: industrialisation and coastal fishing livelihoods in Ghana. Rev Fish Biol Fish 2023; 33:1-18. [PMID: 36620376 PMCID: PMC9809519 DOI: 10.1007/s11160-022-09749-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 05/20/2022] [Accepted: 12/21/2022] [Indexed: 06/17/2023]
Abstract
The growing focus on the blue economy is accelerating industrial fishing in many parts of the world. This intensification is affecting the livelihoods of small-scale fishers, processors, and traders by depleting local fishery resources, damaging fishing gears, putting fishers' lives at risk, and compromising market systems and value chain positions. In this article, we outline the experiences, perspectives, and narratives of the small-scale fishing actors in Ghana. Drawing on qualitative interview data, we examine the relationship between small-scale and industrial fisheries in Ghana using political ecology and sustainable livelihood approaches. We demonstrate how industrialised, capital-intensive fishing has disrupted the economic and social organisation of local fishing communities, affecting incomes, causing conflicts, social exclusion and disconnection, and compromising the social identity of women. These cumulative impacts and disruptions in Ghana's coastal communities have threatened the viability of small-scale fisheries, yet coastal fishing actors have few capabilities to adapt. We conclude by supporting recommendations to reduce the number and capacity of industrial vessels, strictly enforce spatial regulations, and ensure "blue justice" against marginalisation.
Collapse
Affiliation(s)
- Raymond K. Ayilu
- Climate, Society and Environment Research Centre (C-SERC), University of Technology Sydney, Sydney, Australia
| | - Michael Fabinyi
- Climate, Society and Environment Research Centre (C-SERC), University of Technology Sydney, Sydney, Australia
- Resources, Environment and Development Group, Crawford School of Public Policy, The Australian National University, Canberra, ACT Australia
| | - Kate Barclay
- Climate, Society and Environment Research Centre (C-SERC), University of Technology Sydney, Sydney, Australia
| | | |
Collapse
|
5
|
Maciel OLDC, Willmer IQ, Saint'Pierre TD, Machado W, Siciliano S, Hauser-Davis RA. Arsenic contamination in widely consumed Caribbean sharpnose sharks in southeastern Brazil: Baseline data and concerns regarding fisheries resources. Mar Pollut Bull 2021; 172:112905. [PMID: 34523430 DOI: 10.1016/j.marpolbul.2021.112905] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/21/2021] [Revised: 08/16/2021] [Accepted: 08/22/2021] [Indexed: 06/13/2023]
Abstract
Although shark meat is consumed worldwide, elevated arsenic (As) concentrations have been increasingly reported. The Caribbean sharpnose shark (Rhizoprionodon porosus) is a widely consumed fishing resource in Brazil, with scarce information on As burdens to date. Herein, commercial-sized juvenile Caribbean sharpnose sharks from Rio de Janeiro (Brazil) were assessed in this regard, presenting significantly higher hepatic As concentrations in males (8.24 ± 1.20 mg kg-1 wet weight; n = 12) compared to females (6.59 ± 1.87 mg kg-1 w.w.; n = 8), and a positive correlation (r = 0.74) was noted between female muscle and liver As concentrations, indicating systemic inter-tissue transport not evidenced in males. Arsenic concentrations were over the maximum permissible As limit established in Brazilian legislation for seafood and calculated Target Hazard Quotients suggest consumption risks, although cancer risks were not evidenced. Therefore, Public Health concerns with regard to Caribbean sharpnose shark As burdens deserve careful attention.
Collapse
Affiliation(s)
- Oswaldo Luiz de C Maciel
- Fundação Instituto da Pesca do Estado do Rio de Janeiro (FIPERJ), 24030-020 Niterói, RJ, Brazil; Programa de Pós-Graduação em Geociências (Geoquímica), Universidade Federal Fluminense (UFF), 24020-141 Niterói, RJ, Brazil.
| | - Isabel Q Willmer
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz (Fiocruz), 21040-360 Rio de Janeiro, RJ, Brazil; Laboratório de Biologia e Tecnologia Pesqueira, Departamento de Biologia Marinha, Universidade do Rio de Janeiro (UFRJ), 21941-902 Rio de Janeiro, RJ, Brazil
| | - Tatiana D Saint'Pierre
- Departamento de Química, Pontifícia Universidade Católica do Rio de Janeiro (PUC-Rio), 22453-900 Rio de Janeiro, RJ, Brazil
| | - Wilson Machado
- Programa de Pós-Graduação em Geociências (Geoquímica), Universidade Federal Fluminense (UFF), 24020-141 Niterói, RJ, Brazil; Laboratório de Geoquímica do Antropoceno, Departamento de Geoquímica, Universidade Federal Fluminense (UFF), 24020-141 Niterói, RJ, Brazil.
| | - Salvatore Siciliano
- Grupo de Estudos de Mamíferos Marinhos da Região dos Lagos (GEMM-Lagos), 28970-000 Araruama, RJ, Brazil; Fundação Oswaldo Cruz (Fiocruz), Av. Brasil, 4.365, Manguinhos, 21040-900 Rio de Janeiro, RJ, Brazil
| | - Rachel Ann Hauser-Davis
- Laboratório de Avaliação e Promoção da Saúde Ambiental, Instituto Oswaldo Cruz (Fiocruz), 21040-360 Rio de Janeiro, RJ, Brazil.
| |
Collapse
|
6
|
de Oliveira Estevo M, Lopes PFM, de Oliveira Júnior JGC, Junqueira AB, de Oliveira Santos AP, da Silva Lima JA, Malhado ACM, Ladle RJ, Campos-Silva JV. Immediate social and economic impacts of a major oil spill on Brazilian coastal fishing communities. Mar Pollut Bull 2021; 164:111984. [PMID: 33517088 DOI: 10.1016/j.marpolbul.2021.111984] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/20/2020] [Revised: 07/24/2020] [Accepted: 12/22/2020] [Indexed: 06/12/2023]
Abstract
In August 2019, a major oil spill hit nine Brazilian coastal states, affecting marine ecosystems and fishing communities. In this study, we assess the immediate social and economic impacts of this oil spill on fishing communities of the northeast coast. We conducted semi-structured interviews and focal meetings with 381 fishers and shellfish gatherers to understand the perceived socioeconomic impacts on different types of fishing. We also obtained information on fish consumption after the oil spill, which we compared with data prior to the oil spill from the same communities. Sales decreased by more than 50% for all types of fishing, strongly impacting local income generation. These communities, which are already social-ecologically vulnerable, have had their subsistence, food security and cultural maintenance strongly compromised. We argue that there is a clear need for coordinated state interventions to mitigation the impacts, considering it's environmental, social, economic, human health and political dimensions.
Collapse
Affiliation(s)
- Mariana de Oliveira Estevo
- Instituto de Ciências Biológicas e da Saúde, Universidade Federal do Alagoas, Maceió 57072-900, AL, Brazil.
| | - Priscila F M Lopes
- Departamento de Ecologia, Centro de Biociências, Universidade Federal do Rio Grande do Norte, Natal, RN, Brazil
| | | | - André Braga Junqueira
- Institut de Ciència i Tecnologia Ambientals, Universitat Autònoma de Barcelona, Spain
| | - Ana Paula de Oliveira Santos
- Instituto de Ciências Biológicas e da Saúde, Universidade Federal do Alagoas, Maceió 57072-900, AL, Brazil; Associação de Jangadeiros Artesanais do Município de Barra de Santo Antônio - AJAMBASA, Barra de Santo Antônio, AL, Brazil
| | - Johnny Antonio da Silva Lima
- Instituto de Ciências Biológicas e da Saúde, Universidade Federal do Alagoas, Maceió 57072-900, AL, Brazil; Colonia de Pescadores Santo Amaro-21, Paripueira, AL, Brazil
| | - Ana Claudia Mendes Malhado
- Instituto de Ciências Biológicas e da Saúde, Universidade Federal do Alagoas, Maceió 57072-900, AL, Brazil
| | - Richard J Ladle
- Instituto de Ciências Biológicas e da Saúde, Universidade Federal do Alagoas, Maceió 57072-900, AL, Brazil; ERA Chair in Tropical Biodiversity and Ecosystems Research, CIBIO, Portugal
| | - João Vitor Campos-Silva
- Instituto de Ciências Biológicas e da Saúde, Universidade Federal do Alagoas, Maceió 57072-900, AL, Brazil; Faculty of Environmental Sciences and Natural Resource Management, Norwegian University of Life Sciences, Ås, Norway
| |
Collapse
|
7
|
Wosnick N, Prado AC, Padilha É, Musyl MK. Current status and potential contributions of fisheries statistics from artisanal fisheries for managing juvenile istiophorid billfishes in Southern Brazil. Environ Biol Fishes 2021; 104:375-382. [PMID: 33551541 PMCID: PMC7846492 DOI: 10.1007/s10641-021-01060-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/17/2020] [Accepted: 01/24/2021] [Indexed: 06/12/2023]
Abstract
Billfishes are considered important fishery resources and the identification of aggregation sites is imperative for proper management. Here we present evidence of a seasonal aggregation site for juvenile istiophorid billfishes in southern Brazil. We discuss the results as they relate with the need for management at a local scale and participatory monitoring with artisanal fishing communities as a way to ensure access to data on the occurrence and population status in the long term.
Collapse
Affiliation(s)
- Natascha Wosnick
- Programa de Pós-graduação em Zoologia, Universidade Federal do Paraná, Curitiba, Paraná Brazil
| | - Aline C. Prado
- Programa de Pós-graduação em Zoologia, Universidade Federal do Paraná, Curitiba, Paraná Brazil
| | - Érica Padilha
- Programa de Pós-graduação em Zoologia, Universidade Federal do Paraná, Curitiba, Paraná Brazil
| | | |
Collapse
|
8
|
da Silva AB, Lopes JB, Figueiredo LS, de Barros RFM, Souto WMS, Alencar NL, Lopes CGR. Water spirits within the fishers' worldview: implications for fishing management in Northeast Brazil. J Ethnobiol Ethnomed 2019; 15:70. [PMID: 31870386 PMCID: PMC6929421 DOI: 10.1186/s13002-019-0350-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 07/19/2019] [Accepted: 12/12/2019] [Indexed: 06/10/2023]
Abstract
BACKGROUND Historically, aquatic environments are linked to the worldview of many local people, where there is an interconnection between the natural world, the supernatural, and the social organization. In this study, we provided a discussion on how the supernatural beings that inhabit the freshwater systems interact with artisanal fishers and fishing resources in the riverine community of Parnaíba River middle course, in Mid North of Northeast Brazil. We also provided the implications of these interactions on the fisher's behaviors and how the acculturation process (e.g., introduction of new religions) can affect the fishers' worldview. METHOD The selection of participants was done through intentional sampling. The content qualitative analysis was carried out to interpret the data from semi-structured interviews with 29 artisanal fishers. RESULTS The mythical representations that inhabit the aquatic environments in the surveyed area were as follows: Mãe d' água, Cabeça de cuia, Muleque d'água, Visage, Piratinga, Sucuiuiu, and Luz e Arco-íris. These beings have distinctions regarding the form and attributions and can be associated with seasonality (temporal markers) and specific habitats (spatial markers). The respect and fear feeling of the mythical beings were striking among the fishers interviewed. For instance, we have record offering practices in order to obtain protection and success during the fisheries. These practices suggest that there may be local conservationist habits in fisheries management. However, the advancement of urbanization and the introduction of new religions that deny the existence of mythical entities are factors that can generate the acculturation process among the fishers. CONCLUSIONS It is therefore necessary to carry out more studies in the surveyed area in order to evaluate the existence of possible patterns in the relationship between fisher and mythical beings. This information could confirm the role of mythical beings as environmental regulators. Consequently, it could be considered in the conservationist policies of fishery resources, reinforcing the importance of local knowledge and cultural factors for fishing management approaches.
Collapse
Affiliation(s)
- André Bastos da Silva
- Development and Environment Graduate Program, Federal University of Piauí (UFPI), Universitária, Teresina, Piauí, 64049-550, Brazil.
| | - João Batista Lopes
- Development and Environment Graduate Program, Federal University of Piauí (UFPI), Universitária, Teresina, Piauí, 64049-550, Brazil
| | - Luciano Silva Figueiredo
- Development and Environment Graduate Program, Federal University of Piauí (UFPI), Universitária, Teresina, Piauí, 64049-550, Brazil
- Nature Science Center, State University of Piauí (UESPI), 25 Highway BR230, Picos, Piauí, 64600-000, Brazil
| | - Roseli Farias Melo de Barros
- Development and Environment Graduate Program, Federal University of Piauí (UFPI), Universitária, Teresina, Piauí, 64049-550, Brazil
- Department of Biology, UFPI, Teresina, Brazil
| | - Wedson Medeiros Silva Souto
- Development and Environment Graduate Program, Federal University of Piauí (UFPI), Universitária, Teresina, Piauí, 64049-550, Brazil
- Department of Biology, UFPI, Teresina, Brazil
| | | | - Clarissa Gomes Reis Lopes
- Development and Environment Graduate Program, Federal University of Piauí (UFPI), Universitária, Teresina, Piauí, 64049-550, Brazil
| |
Collapse
|
9
|
Farias EGG, Preichardt PR, Dantas DV. Influence of fishing activity over the marine debris composition close to coastal jetty. Environ Sci Pollut Res Int 2018; 25:16246-16253. [PMID: 29687197 DOI: 10.1007/s11356-018-2012-4] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/21/2017] [Accepted: 04/11/2018] [Indexed: 06/08/2023]
Abstract
Worldwide, the marine debris emissions have been provoking impacts in ecosystems, generating massive mortality of different species with commercial interest. In South America, we have a lack of studies to verify the marine debris composition in transitional environments such as adjacent regions of coastal jetties. These are hydraulic engineering constructions used to maintain the navigation channel access between the sea-estuarine interface and are also used by teleost fishes, crustaceans, and mollusks like artificial shelters (reefs), being excellent fishing grounds. Therefore, the present study was devoted to qualitatively evaluate the composition of marine debris in an internal jetty portion of a Laguna Estuarine System (LES) located in South America (Brazil). Six hundred freediving were conducted to collect marine debris in the study region. The in situ campaigns were performed in 2016 during all spring season (sand substrata) in four distinct zones with 26,400 m2 each one covering almost all adjacent jetty extension, to evaluate possible spatial changes in the marine debris composition. All material obtained was identified, measured, weighed, and ordered in eight groups, with six groups being related to the fishing activity and two groups related to the tourism/community in the study region. So, it was possible to observe possible relations between the marine debris distribution to artisanal and recreational local fishing. After 600 freediving sampling efforts, 2142 marine debris items were obtained, totaling close to 100 kg of solid waste removed from the inner portion of the coastal jetty. Notably, 1752 units (50 kg) of fishing leads were collected being this item the main marine debris residue found in the four sampled areas, corresponding to nearly 50% of the total weight of the collected waste. Ninety-eight percent of marine debris were derived from the local fishing activities, and just 2% were derived from tourism/community. Considering the total contribution related to fishing, 83% of the marine debris were composed by lead (sinkers) adopted by recreational and artisanal fishing. Notably, the catch activity in this region has a close influence over the marine debris composition. Reductions of marine debris emissions derived from the fishing activities have been a global challenge, once this problem is occurring in practically all marine and estuarine environments under the anthropic action. The presence of marine debris changes the local landscape and can provoke serious environmental problems, such as ghost fishing that affects a wide variability of marine mammals, birds, and fishes. Most of marine debris collected came from recreational and artisanal fishing, being the fishing leads the most prominent material, especially in sector 4. This fact is possibly related to the intense mullet fishing using cast nets, usual in this sample area. In the other sectors, there was a great predominance of grapnel fishing leads, widely adopted by recreational fishermen in open water environments. The "fingernails" present in these fishing leads ensure the sinking of the line for a specific location independently of possible flow oscillations of the tidal current and/or currents generated by winds. The massive quantity of fishing leads into the sectors is a dangerous fact. Notably, lead is a heavy, non-biodegradable, and extremely toxic metal that, due to the anthropogenic activities, has been increasing around the world. Future efforts in our study region should evaluate the seasonal marine debris composition to observe possible changes along the different seasons of the year. In this way, it would be possible to infer quantitatively the emission of marine debris derived from the fishing activity, assessing its impacts and enabling the adoption of environmental management strategies. This effort adopted a qualitative analysis, serving to show the current situation of this region that we now know to be vulnerable to the presence of marine debris derived from the fishing activity.
Collapse
Affiliation(s)
- Eduardo G G Farias
- Grupo de Tecnologia e Ciência Pesqueira (TECPESCA), Departamento de Engenharia de Pesca e Ciências Biológicas, Universidade do Estado de Santa Catarina (UDESC), R. Cel. Fernandes Martins, Laguna, Santa Catarina, 270, Brazil.
| | - Paulo R Preichardt
- Grupo de Tecnologia e Ciência Pesqueira (TECPESCA), Departamento de Engenharia de Pesca e Ciências Biológicas, Universidade do Estado de Santa Catarina (UDESC), R. Cel. Fernandes Martins, Laguna, Santa Catarina, 270, Brazil
| | - David V Dantas
- Grupo de Tecnologia e Ciência Pesqueira (TECPESCA), Departamento de Engenharia de Pesca e Ciências Biológicas, Universidade do Estado de Santa Catarina (UDESC), R. Cel. Fernandes Martins, Laguna, Santa Catarina, 270, Brazil
- Programa de Pós-Graduação em Planejamento Territorial e Desenvolvimento Socioambiental (PPGPLAN) - UDESC/FAED, Florianópolis, Brazil
| |
Collapse
|
10
|
LIMA MSP, OLIVEIRA JELINS, de NÓBREGA MF, LOPES PFM. The use of Local Ecological Knowledge as a complementary approach to understand the temporal and spatial patterns of fishery resources distribution. J Ethnobiol Ethnomed 2017; 13:30. [PMID: 28571574 PMCID: PMC5455079 DOI: 10.1186/s13002-017-0156-9] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2016] [Accepted: 05/04/2017] [Indexed: 05/22/2023]
Abstract
BACKGROUND Acquiring fast and accurate information on ecological patterns of fishery resources is a basic first step for their management. However, some countries may lack the technical and/or the financial means to undergo traditional scientific samplings to get such information; therefore affordable and reliable alternatives need to be sought. METHODS We compared two different approaches to identify occurrence patterns and catch for three main fish species caught with bottom-set gillnets used by artisanal fishers from northeast Brazil: (1) scientific on-board record data of small-scale fleet (n = 72 trips), and (2) interviews with small-scale fishers on Local Ecological Knowledge (LEK) (n = 32 interviews). We correlated (Pearson correlations) the months cited by fishers (LEK) as belonging to the rainy or to the dry season with observed periods of higher and lower precipitation (SK). The presence of the three main fish species at different depths was compared between LEK and SK by Spearman correlations. Spearman correlations were also used to compare the depths of greatest abundance (with the highest Capture per Unit Effort - CPUE) of these species; the CPUEs were descendly ordered. RESULTS Both methods provided similar and complementary bathymetric patterns of species occurrence and catch. The largest catches occured in deeper areas, which also happened to be less intensively fished. The preference for fishing in shallower and less productive areas was mostly due to environmental factors, such as weaker currents and less drifting algae at such depths. CONCLUSION Both on-board and interview methods were accurate and brought complementary information, even though fishers provided faster data when compared to scientific on-board observations. When time and funding are not limited, integrative approaches such as the one presented here are likely the best option to obtain information, otherwise fishers' LEK could be a better choice for when a compromise between speed, reliability and cost needs to be reached.
Collapse
Affiliation(s)
- Mauro Sergio Pinheiro LIMA
- Department of Oceanography and Limnology at the Federal University of Rio Grande do Norte, Natal, Brazil
| | | | | | - Priscila Fabiana Macedo LOPES
- Fishing Ecology, Management and Economics group, Department of Ecology at the Federal University of Rio Grande do Norte, Natal, RN Brazil
| |
Collapse
|