Length-Based Stock Assessment for the Data-Poor Bombay Duck Fishery from the Northern Bay of Bengal Coast, Bangladesh
The Bombay duck (<i>Harpadon nehereus</i>) forms the second-largest single-species marine fishery in Bangladesh and therefore has a significant impact on the local economy, providing employment, food, and nutrition to thousands of people. Despite the immense importance, this fishery has...
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| Format: | Article |
| Language: | English |
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MDPI AG
2022-02-01
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| Series: | Journal of Marine Science and Engineering |
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| Online Access: | https://www.mdpi.com/2077-1312/10/2/213 |
| _version_ | 1797478964845871104 |
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| author | Mohammed Shahidul Alam Qun Liu Petra Schneider Mohammad Mojibul Hoque Mozumder Mohammad Zahedur Rahman Chowdhury Mohammad Muslem Uddin Md. Mostafa Monwar Md. Enamul Hoque Suman Barua |
| author_facet | Mohammed Shahidul Alam Qun Liu Petra Schneider Mohammad Mojibul Hoque Mozumder Mohammad Zahedur Rahman Chowdhury Mohammad Muslem Uddin Md. Mostafa Monwar Md. Enamul Hoque Suman Barua |
| author_sort | Mohammed Shahidul Alam |
| collection | DOAJ |
| description | The Bombay duck (<i>Harpadon nehereus</i>) forms the second-largest single-species marine fishery in Bangladesh and therefore has a significant impact on the local economy, providing employment, food, and nutrition to thousands of people. Despite the immense importance, this fishery has never been a priority for the relevant regulatory authorities. To enhance the sustainability of this fishery, an effective management policy based on the scientific evaluation of the current stock’s status is urgently required. Therefore, this study used three methodological approaches (traditional size structure-based stock assessment to reveal current exploitation status; the length-based spawning potential ratio (LB-SPR) to evaluate the stock’s spawning biomass; and Froese’s sustainability indicators for sustainable fishing) to conduct a thorough assessment of the Bombay duck stock to establish basic standards for the sustainable management of this fishery. The results revealed that this fishery is presently suffering from overexploitation and the stock’s spawning biomass (<i>SPR</i> = 8%) is below the limit reference point because of the juvenile-oriented fishing behavior of the fishery. Based on the outputs, this study recommended the mesh size regulation of the set bag nets (SBNs) (5 cm mesh size for the codend) to ensure not to catch immature fishes with a length equal to or smaller than 17.95 cm; and reduce the existing number of SBNs by half to reduce fishing pressure on the stock to ensure the sustainability of this fishery. |
| first_indexed | 2024-03-09T21:39:07Z |
| format | Article |
| id | doaj.art-5e0c421520744f92996250fdb30a1b38 |
| institution | Directory Open Access Journal |
| issn | 2077-1312 |
| language | English |
| last_indexed | 2024-03-09T21:39:07Z |
| publishDate | 2022-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Marine Science and Engineering |
| spelling | doaj.art-5e0c421520744f92996250fdb30a1b382023-11-23T20:35:20ZengMDPI AGJournal of Marine Science and Engineering2077-13122022-02-0110221310.3390/jmse10020213Length-Based Stock Assessment for the Data-Poor Bombay Duck Fishery from the Northern Bay of Bengal Coast, BangladeshMohammed Shahidul Alam0Qun Liu1Petra Schneider2Mohammad Mojibul Hoque Mozumder3Mohammad Zahedur Rahman Chowdhury4Mohammad Muslem Uddin5Md. Mostafa Monwar6Md. Enamul Hoque7Suman Barua8College of Fisheries, Ocean University of China, Qingdao 266003, ChinaCollege of Fisheries, Ocean University of China, Qingdao 266003, ChinaDepartment for Water, Environment, Civil Engineering and Safety, University of Applied Sciences Magdeburg-Stendal, Breitscheidstraße 2, D-39114 Magdeburg, GermanyFisheries and Environmental Management Group, Helsinki Institute of Sustainability Science (HELSUS), Faculty of Biological and Environmental Sciences, University of Helsinki, 00014 Helsinki, FinlandInstitute of Marine Science, University of Chittagong, Chattogram 4331, BangladeshDepartment of Oceanography, University of Chittagong, Chattogram 4331, BangladeshInstitute of Marine Science, University of Chittagong, Chattogram 4331, BangladeshDepartment of Oceanography, University of Chittagong, Chattogram 4331, BangladeshCollege of Fisheries, Ocean University of China, Qingdao 266003, ChinaThe Bombay duck (<i>Harpadon nehereus</i>) forms the second-largest single-species marine fishery in Bangladesh and therefore has a significant impact on the local economy, providing employment, food, and nutrition to thousands of people. Despite the immense importance, this fishery has never been a priority for the relevant regulatory authorities. To enhance the sustainability of this fishery, an effective management policy based on the scientific evaluation of the current stock’s status is urgently required. Therefore, this study used three methodological approaches (traditional size structure-based stock assessment to reveal current exploitation status; the length-based spawning potential ratio (LB-SPR) to evaluate the stock’s spawning biomass; and Froese’s sustainability indicators for sustainable fishing) to conduct a thorough assessment of the Bombay duck stock to establish basic standards for the sustainable management of this fishery. The results revealed that this fishery is presently suffering from overexploitation and the stock’s spawning biomass (<i>SPR</i> = 8%) is below the limit reference point because of the juvenile-oriented fishing behavior of the fishery. Based on the outputs, this study recommended the mesh size regulation of the set bag nets (SBNs) (5 cm mesh size for the codend) to ensure not to catch immature fishes with a length equal to or smaller than 17.95 cm; and reduce the existing number of SBNs by half to reduce fishing pressure on the stock to ensure the sustainability of this fishery.https://www.mdpi.com/2077-1312/10/2/213Bombay duckexploitationspawning potential ratiolength-based indicatorsoverexploitationlow <i>SPR</i> |
| spellingShingle | Mohammed Shahidul Alam Qun Liu Petra Schneider Mohammad Mojibul Hoque Mozumder Mohammad Zahedur Rahman Chowdhury Mohammad Muslem Uddin Md. Mostafa Monwar Md. Enamul Hoque Suman Barua Length-Based Stock Assessment for the Data-Poor Bombay Duck Fishery from the Northern Bay of Bengal Coast, Bangladesh Journal of Marine Science and Engineering Bombay duck exploitation spawning potential ratio length-based indicators overexploitation low <i>SPR</i> |
| title | Length-Based Stock Assessment for the Data-Poor Bombay Duck Fishery from the Northern Bay of Bengal Coast, Bangladesh |
| title_full | Length-Based Stock Assessment for the Data-Poor Bombay Duck Fishery from the Northern Bay of Bengal Coast, Bangladesh |
| title_fullStr | Length-Based Stock Assessment for the Data-Poor Bombay Duck Fishery from the Northern Bay of Bengal Coast, Bangladesh |
| title_full_unstemmed | Length-Based Stock Assessment for the Data-Poor Bombay Duck Fishery from the Northern Bay of Bengal Coast, Bangladesh |
| title_short | Length-Based Stock Assessment for the Data-Poor Bombay Duck Fishery from the Northern Bay of Bengal Coast, Bangladesh |
| title_sort | length based stock assessment for the data poor bombay duck fishery from the northern bay of bengal coast bangladesh |
| topic | Bombay duck exploitation spawning potential ratio length-based indicators overexploitation low <i>SPR</i> |
| url | https://www.mdpi.com/2077-1312/10/2/213 |
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