Researchers say that trawlers in Myanmar are using nets with a 2.5cm (one inch) mesh - trapping smaller, juvenile fish, even though the minimum standard size should be 10cm. Skovrind, M. et al. This finding was consistent with the major groupings in the above-mentioned analyses, in which individuals of Chandpur and Surma-Kushiara River were clustered as Eastern Riverine group. Article  If you do not receive an email within 10 minutes, your email address may not be registered, and M.A. Mazid, M. A. Altschul, S. F. et al. Collection codes correspond to those listed in Table 1. 7, 43417, (2017). New Delhi: Lovers of hilsa, the fish considered a big delicacy in most Bengali households, have some good news to look forward to. The pairwise FST values for the adaptive loci dataset were markedly higher than the FST values for the neutral loci dataset, supporting genetic distinctiveness between the Hilsa shad populations (Table 4). Out of a total of 46,307 loci within a catalog of 92,971 consensus sequences, only 31,276 loci were remained when indels and SNP sites with less than 5% minor allele frequency have been removed from the original dataset. Scientific Reports Owing to the distinctive differences observed in the body height, the Hilsa stocks were divided into Western Riverine’s ‘Broad type’ and Eastern Riverine’s ‘Slender type’56,57,58. Video, Sisters celebrate Diwali with a difference, US election 2020: Biden takes Georgia to solidify victory, Doug Emhoff: The first 'second dude' in the White House, Coronavirus: Italy extends 'red zones' as infections soar, Princess Diana's note to BBC about Panorama interview recovered, US Election 2020: The 'dead voters' in Michigan who are still alive, Georgia judge denies bond for father and son in Ahmaud Arbery case, EU-UK talks: 'Make or break' moment approaching, say both sides, Dominic Cummings: PM's top adviser leaves No 10 to 'clear the air', Coronavirus: North Korea and Russia hackers 'targeting vaccine', How North Korea is trying to tackle smoking. Bangladesh has a shore of close to 75 percent in the production of Hilsa fish in the world. Proceedings of the National Academy of Sciences, India, Section B: Biological Sciences 34, 44–57 (1968). Ultimately, isolating mechanisms, environmental factors, and the temporal stability of these patterns in structuring these groups in Bangladesh will require further study to help fishery managers in formulating ecotypes oriented management strategies for sustainable fisheries of two million fishers who participate in the Hilsa shad fishery. Lal, K. K., Kumar, D., Srivastava, S. K. & Mukherjee, A. Fisheries and Marine Resource Technology Discipline, Khulna University, Khulna, Bangladesh, Connecticut Sea Grant Extension, Department of Agriculture and Resource Economics, University of Connecticut, Avery Point, Groton, Connecticut, Department of Fisheries, University of Rajshahi, Rajshahi, Bangladesh. Marine Fishery Resource Management in the Bay of Bengal, 66 pp. The genetic differentiation at quantitative trait loci under local adaptation. View the article PDF and any associated supplements and figures for a period of 48 hours. Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. Fragmented DNA was then amplified for 25 cycles at 72 °C, with one of the primers matching the adapter and extending 8 nucleotides into the genomic DNA with the selective sequence GTGTAGAG. DNA isolations were performed using Promega DNA purification system (Promega, Madison, WI, USA) according to the manufacturer’s protocol. On a similar study of population genomics, through transcriptome analysis it was found that intron retention and alternative polyadenylation is largely independent along the transcript, leading to thousands of novel isoforms. Loci that were heterozygous in all samples or had more than 2 alleles in a sample (suggesting collapsed paralogs) were removed. Cristescu, M. E. Genetic reconstructions of invasion history. Performed spatial analysis and interpreted the analysis: Y.I and S.A. Read about our approach to external linking. I would walk from Golpark to Jadavpur.”, Sakura also mentions: “I liked studying Bengali in Jadavpur and decided to pursue it long term. The video shows that she is equally fluent in Hindi. CAS  It also found that migration failure is the major cause for decline of hilsa population in the upper stretch of Ganga. Besides, the presence of population structuring in Hilsa shad was also reported by studies conducted using allozymes markers14,49,50 and RAPD analysis20,21. and (ii) is there any relationship between adults and juveniles of a particular habitat? U Kauk Tin knows that he and fishermen like him have a role to play in solving the issue, but he needs help. Hussain, M. G., Salini, J. P., Islam, M. S. & Mazid, M. A. & Hossain, H. A morphometric study of the population of Hilsa ilisha (Hamilton-Buchanan) from the river Meghna. Rahman, M. & Nævdal, G. Studies on hemoglobins of Hilsa shad by isoelectric focusing. Therefore, fishes from Kuakata may have migrated to Bhola to spawn, but not to any other rivers, as significant differentiations between Kuakata and other river populations have been observed. 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To reduce annotations to repetitive sequences in the database, each locus in the vcf file had the associated sequence annotated by blast, using: blastn -db ncbi-blast-2.4.0+/db/nt and filtering for those blast hits with a significance of e-15 or better. & Chenery, S. R. Can Otolith chemistry detect the population structure of the shad Hilsa Tenualosa ilisha? This might be because that these two sites are the common routes of Hilsa shad to migrate from downstream to the geographically separated upstream rivers, thereby frequent admixture events may likely happen, and some adults may have been mixed during sampling activities. Collection codes correspond to those listed in Table 1. The marine subtype inhabited nearshore coastal and/or sea habitats and relies on downstream estuarine waters for spawning without migrating to freshwater9,10,11. But commercial trawlers catch them with purse seine nets - a large circular wall of net which goes down very deep to scoop up fish of all sizes. Article  The official said the CIFRI study found that “tagged hilsa were recorded as far as Munger in Bihar”. We suggest that this innovative work provides a model that may be of value in other aquatic species, especially in anadromous fish species that intersect diverse ecotypes during their life-history stages. It was reported last week that the Border Security Force seized approximately 2,800 kg of Bangladeshi hilsa in the last seven months. All reads were mapped to the reference with an alignment identity threshold of 0.95 using bbmap (BBMap tools). Fisheries: minor commercial; aquaculture: experimental, Total processing time for the page : 1.1394 seconds. This year, IIED is going to work on a project to help Myanmar's poor fishing communities using a programme they implemented in Bangladesh in which fishing communities were given rice as an incentive not to catch hilsa in the closed season. Similarly, it was reported that Hilsa shad has genetically two different populations from two major inland rivers of Bangladesh, the Padma and the Meghna20. Myanmar catches about 15-20% of all hilsa globally, second only to neighbouring Bangladesh which is responsible for about 60% of the total catch in the world, according to a report by the Bay of Bengal Large Marine Ecosystem (BOBLME) project.