New publication: Marine megafauna catch in Thai small-scale fisheries
Dear MARMAMers, We are pleased to share our new OA research paper in Aquatic Conservation, where we estimate the annual marine megafauna catch (marine mammals, sea turtles, and elasmobranchs) in Thailand's small-scale fisheries. Svarachorn T, Temple AJ & Berggren P (2023). Marine megafauna catch in Thai small-scale fisheries. Aquatic Conservation: Marine and Freshwater Ecosystems, 1-18. https://doi.org/10.1002/aqc.3989 Abstract: 1. Small-scale fisheries are a global conservation threat to marine megafauna (marine mammals, sea turtles, and elasmobranchs). There is currently limited information about marine megafauna catch in Thailand's small-scale fisheries, which is required for effective management. 2. This study represents the first independent catch assessment of marine megafauna in Thai small-scale fisheries. Data on catch and fisheries effort across 1 year (2016-2017) were collected from questionnaire interviews with 535 fishers in 17 provinces along the Gulf of Thailand and the Andaman Sea coasts. Catch per unit effort was calculated for marine megafauna by fishing gear types and extrapolated to estimate annual catches using Thai official fisheries statistics. 3. The annual estimated catches were 5.66 million (95% confidence interval, CI: 4.10-7.82 million) rays, 457,864 (95% CI: 192,352-969,166) sharks, 2,400 (95% CI: 1610-3,537) sea turtles, 790 (95% CI: 519-1,167) small cetaceans, and 72 (95% CI: 19-194) dugongs in Thai small-scale fisheries. 4. Gillnets had the highest catch per unit effort for all megafauna groups in both sea areas except for sea turtles, where pound nets had the highest catch per unit effort in the Gulf of Thailand. Further, among gillnets, crab gillnets had the highest catch per unit effort for all groups except dugongs, where ray gillnets had the highest catch per unit effort. Accounting for effort, crab gillnets and shrimp trammel nets were responsible for most of the megafauna catch, where crab gillnets contributed 72%-95% of the annual estimated marine megafauna catch. Crab gillnets and shrimp trammel nets were used by 46% and 40% respectively of the interviewed fishers and by 27% and 15% respectively of all small-scale fishers operating in Thai waters. 5. Restrictions for gillnet fishing effort (crab gillnets specifically) are needed to prevent extirpation of threatened megafauna species that are important for ecosystem resilience and productivity. Open access paper available at: https://doi.org/10.1002/aqc.3989 Cheers, Per _______________________________________________________________ Per Berggren Professor of Marine Megafauna Conservation, School of Natural & Environmental Sciences 5.90 Ridley Building 2, Newcastle University, NE1 7RU, UK Tel +44 191 2085676, Email: per.berggren@ncl.ac.uk<mailto:per.berggren@ncl.ac.uk> https://www.ncl.ac.uk/nes/our-research/marine/ https://twitter.com/perberggren1 ------------------------------------------------------------------------------------------------------ [cid:image001.png@01D9C94D.C8518230] Latest papers: Marine megafauna catch in Thai small-scale fisheries https://doi.org/10.1002/aqc.3989 Offshore construction using gravity-base foundations indicates no long-term impacts on dolphins and harbour porpoise. https://doi.org/10.1007/s00227-023-04240-1 _______________________________________________________________
Dear MARMAMers, We are pleased to inform you about a publication in Lutra about the fatal asphyxiation in seals due to Dover soles. Reference: Haelters, J., Jauniaux, T., Kik, M.J.L. & Kerckhof, F., 2023. Prey that kill: Dover soles (Solea solea) causing fatal asphyxiation in seals in the southern North Sea. Lutra 66(1): 55-65. Abstract: Along with the increase of harbour seals and grey seals in the southern North Sea, the number of stranded dead and dying seals has risen sharply in recent decades. A selection of animals stranded in Belgium and the Netherlands is examined, with as one of the main objectives to collect information about the cause of death. One of the causes of death is suffocation from fish that enter the trachea, or from fish that are too large to be swallowed completely. In this contribution, eleven of such cases are discussed. It appears that Dover sole (Solea solea) is especially dangerous for seals. If you would like to obtain a pdf copy of the article, please send me a message. Cheers, Jan ________________________ __ Jan Haelters jhaelters@naturalsciences.be<mailto:jhaelters@naturalsciences.be> Royal Belgian Institute of Natural Sciences 3de en 23ste Linieregimentsplein B-8400 Ostend Belgium https://odnature.naturalsciences.be/mumm/
participants (2)
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Jan Haelters -
Per Berggren