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Le Gué L, Savina E, Arhant M, Davies P, Dumergue N, Vincent B. Influence of knot strength on the mechanical performance of a biodegradable gillnet. Sci Rep 2024; 14:15450. [PMID: 38965403 PMCID: PMC11224365 DOI: 10.1038/s41598-024-66474-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/20/2024] [Accepted: 07/01/2024] [Indexed: 07/06/2024] Open
Abstract
Ghost fishing is a global issue that can be addressed using fishing gear materials that do not persist in the marine environment. However, for these alternatives to be widely adopted, they must meet the same mechanical specifications as current commercial materials while degrading without any negative impact. The objective of this study was to compare a conventional gillnet made of polyamide 6 (PA6) with an alternative made of poly(butylene succinate-co-adipate-co-terephthalate) (PBSAT) at three different scales: monofilament, knot, and net. While the PBSAT monofilament's strength was half that of the conventional PA6 net, knot and net losses were even more significant. This indicates a greater sensitivity of the material to the knot. Since the results between the knot and net scales were coherent, testing whole net panels is not necessary. Studying the curvature and the behaviour of the knot revealed its complex geometry and mechanical behaviour. Testing the weaver's knot is a good indicator for studying the relevance of an alternative to conventional fishing gear materials. This should be considered when developing biodegradable nets in order to reduce ghost fishing at sea.
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Affiliation(s)
- Louis Le Gué
- Ifremer, RDT Research and Technological Development, 29280, Plouzané, France.
- Institut Agro, IFREMER, INRAE, DECOD, 56325, Lorient, France.
| | - Esther Savina
- Section for Fisheries Technology, DTU Aqua, 9850, Hirtshals, Denmark
| | - Mael Arhant
- Ifremer, RDT Research and Technological Development, 29280, Plouzané, France
| | - Peter Davies
- Ifremer, RDT Research and Technological Development, 29280, Plouzané, France
| | - Nicolas Dumergue
- Ifremer, RDT Research and Technological Development, 29280, Plouzané, France
| | - Benoit Vincent
- Institut Agro, IFREMER, INRAE, DECOD, 56325, Lorient, France
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Byeon E, Jeong H, Lee YJ, Cho Y, Lee KW, Lee E, Jeong CB, Lee JS, Kang HM. Effects of microplastics and phenanthrene on gut microbiome and metabolome alterations in the marine medaka Oryzias melastigma. JOURNAL OF HAZARDOUS MATERIALS 2024; 461:132620. [PMID: 37757554 DOI: 10.1016/j.jhazmat.2023.132620] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2023] [Revised: 09/10/2023] [Accepted: 09/22/2023] [Indexed: 09/29/2023]
Abstract
Plastic pollution of the oceans is increasing, and toxic interactions between microplastics (MPs) and organic pollutants have become a major environmental concern. However, the combined effects of organic pollutants and MPs on microbiomes and metabolomes have not been studied extensively. In the present study, to evaluate whether MPs and phenanthrene (Phe) act synergistically in the guts of marine medaka (Oryzias melastigma), we performed toxicity assessments, 16 S rRNA gene sequencing, and liquid chromatography-tandem mass spectrometry (LC-MS/MS) analyses. Our investigations revealed increased toxicity induced by Phe, as well as disturbances in gut microbiota (known as dysbiosis) when MPs were present. Furthermore, combined exposure to Phe and MPs resulted in greater alterations to microbiota composition and metabolite profiles. Notably, MP exposure was distinctly associated with the abundance of Shewanella and Spongiibacteraceae, while Phe exposure was associated with the abundance of Marimicrobium. Among key microbiota, Marimicrobium and Roseibacillus were significantly correlated with metabolites responsible for coenzyme A and glycerophospholipid metabolism in medaka. These results suggest that interactions between Phe and MPs may have significant effects on the gut microbiota and metabolism of aquatic organisms and underscore the importance of acknowledging the interplay between MPs and contaminants in aquatic environments.
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Affiliation(s)
- Eunjin Byeon
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Haksoo Jeong
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Yeon-Ju Lee
- Marine Biotechnology & Bioresource Research Department, Korea Institute of Ocean Science and Technology, Busan 49111, South Korea; KIOST School, University of Science and Technology, Daejeon 34113, South Korea
| | - Yeonwoo Cho
- Marine Biotechnology & Bioresource Research Department, Korea Institute of Ocean Science and Technology, Busan 49111, South Korea; KIOST School, University of Science and Technology, Daejeon 34113, South Korea
| | - Kyun-Woo Lee
- Marine Biotechnology & Bioresource Research Department, Korea Institute of Ocean Science and Technology, Busan 49111, South Korea; KIOST School, University of Science and Technology, Daejeon 34113, South Korea
| | - Euihyeon Lee
- Marine Biotechnology & Bioresource Research Department, Korea Institute of Ocean Science and Technology, Busan 49111, South Korea; KIOST School, University of Science and Technology, Daejeon 34113, South Korea
| | - Chang-Bum Jeong
- Department of Marine Science, College of Natural Sciences, Incheon National University, Incheon 22012, South Korea
| | - Jae-Seong Lee
- Department of Biological Sciences, College of Science, Sungkyunkwan University, Suwon 16419, South Korea
| | - Hye-Min Kang
- Marine Biotechnology & Bioresource Research Department, Korea Institute of Ocean Science and Technology, Busan 49111, South Korea; KIOST School, University of Science and Technology, Daejeon 34113, South Korea.
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Le Gué L, Davies P, Arhant M, Vincent B, Tanguy E. Mitigating plastic pollution at sea: Natural seawater degradation of a sustainable PBS/PBAT marine rope. MARINE POLLUTION BULLETIN 2023; 193:115216. [PMID: 37437477 DOI: 10.1016/j.marpolbul.2023.115216] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2023] [Revised: 06/20/2023] [Accepted: 06/21/2023] [Indexed: 07/14/2023]
Abstract
This paper evaluates the use of a PBS/PBAT biodegradable rope to reduce the environmental impact of fishing gear lost at sea. The study aims to better understand the degradation mechanisms that the rope and its monofilaments may encounter due to the long term exposure to seawater. The monofilaments were immersed in natural seawater for up to 18 months, and rope samples were also immersed to study aging at a larger scale and evaluate the ability of a modelling tool to predict initial and aged states of the rope. At low temperatures, no loss of properties was observed for the monofilament and rope. However, at higher temperatures, biodegradation and hydrolysis processes were observed, leading to a faster loss of properties in the monofilament compared to the rope. The modelling tool provided conservative predictions due to severe mechanical test conditions of aged monofilament and a degradation gradient within the rope structure.
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Affiliation(s)
- Louis Le Gué
- Ifremer RDT, Research and Technology Development Unit, 1625 route de Sainte-Anne, Plouzané, 29280, France; DECOD (Ecosystem Dynamics and Sustainability), IFREMER, INRAE, Institut Agro, Lorient, 56325, France.
| | - Peter Davies
- Ifremer RDT, Research and Technology Development Unit, 1625 route de Sainte-Anne, Plouzané, 29280, France
| | - Mael Arhant
- Ifremer RDT, Research and Technology Development Unit, 1625 route de Sainte-Anne, Plouzané, 29280, France
| | - Benoit Vincent
- DECOD (Ecosystem Dynamics and Sustainability), IFREMER, INRAE, Institut Agro, Lorient, 56325, France
| | - Erwan Tanguy
- Le Drezen, 12 rue de Kélareun, Le Guilvinec, 29730, France
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Quantification of catch composition in fisheries: A methodology and its application to compare biodegradable and nylon gillnets. J Nat Conserv 2022. [DOI: 10.1016/j.jnc.2022.126298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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