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Studies of Interactive Marine Fisheries of Bangladesh-BOBP/WP/89

Year of publication 1993

Pages p.120

Author M.S. Islam et al.;Fishery and Aquaculture Economics and Policy Division

Product type Project

Edition 1

Synopsis (short abstract) Concerned about the effects of the estuarine set bagnet fishery on the shrimp and finfish resources and also on other marine fisheries dependent on the same resources, the Bangladesh Department of Fisheries, with the assistance of the Bay of Bengal Programme (BOBP), conducted a two-year (1989-91) biosocioeconomic assessment of the estuarine set bagnet fishery. In ordcr to make the assessments needed for management purposes, it was necessary to gather information on other interactive fisheries: t he marine set bagnet, trammelnet, bottom longline and shrimp trawl fisheries. The only major marine fishery not included was the Hilsa fishery, which does not interact with the estuarine set bagnet fishery. This report contains the information (catch rate, seasonality, catch, effort, biological parameters and cost and earnings) gathered in the estuarine set bagnet and other interactive fisheries, but the socioeconomic information and biosocioeconomic assessment results are published separate ly as BOBP/WP/90 and BOBP/REP/62. The authors of the seven parts of this paper were all members of the Management and Development Project, Department of Fisheries, Chittagong, Bangladesh, and were assisted by BOBP’s Senior Fishery Biologist, Dr K Sivasubramaniam. The investigations were done under BOBP’s “Small-scale Fisherfolk Communities” project funded by DANIDA and SIDA and the reporting under “Bioeconomics of Smallscale Fisheries” funded by UNDP.

Language English

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    Biosocioeconomic Assessment of the Effect of the Estuarine Set Bagnet on the Marine Fisheries of Bangladesh - BOBP/WP/94 1994
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    The estuarine set bagnet (ESBN) fishery of Bangladesh is one of the country’s niost important traditional fisheries and a large population of small-scale fisherfolk have been dependent on it for a long time. In the last two decades, the introduction and rapid expansion of the bottom trawl fishery and of shrimp culture have contributed to problems of interaction and competition among the fisheries which exploit the same penaeid shrimp and demersal finfish stocks. The traditional, but less effic ient, ESBN fishery has not only become vulnerable, being likely to be affected by other fisheries, but may also be destructive to small penaeid shrimp and some of the finfish resources that these other fisheries exploit. The Department of Fisheries, Bangladesh, decided to investigate this issue and the Bay of Bengal Programme (BOBP) was requested to assist. The study was funded by the United Nations Development Programme (UNDP). Bioeconomic and socioeconomic surveys were undertaken in 1989/90 an d a National Seminar was held in January 1992 to discuss the results. Because of the interactive nature of many of the marine fisheries, it was necessary, for the assessment and management of any one fishery, to consider the other fisheries exploiting the same resources. Therefore, in addition to the estuarine set bagnet fishery, the fisheries employing marine set bagnets (MSBN), trammelnets (TRN), beach seines (BS), bottom longlines (BLL) and trawlnets (TWL), as well as shrimp fry-collection using pushnets (PN) and dragnets (DN), were investigated. These studies have been documented separately in BOBP working papers BOBP/WP/89 Studies of Interactive Marine Fisheries of Bangladesh and BOBP/WP/90 — The Socioeconomic Condition of the Estuarine Set Bagnet Fisherfolk in Bangladesh. The present paper is based on the results and findings of these publications and assesses the biosocioeconomic impact of the ESBN fishery on the other marine fisheries of Bangladesh. The working papers mention ed provide additional information on the respective fisheries.
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    Cage Nursery Rearing of Shrimp and Prawn Fry in Bangladesh - BOBP/WP/92 1994
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    The shrimp culture industry of Bangladesh depends on catches of the wild fry of tiger shrimp. Employment as fry-catchers has been generated for thousands of rural poor. But the marketing system is not well developed and high fry mortality occurs due to poor handling. The growing freshwater prawn farming sector, however, continues to demand increasing quantities of large juveniles. This report, based on field trials from 1990 to 1993, describes the results of cage nurseryculture trials with b oth tiger shrmip (Penaeus monodon) and giant freshwater prawn (Macrobrachium rosenbergii) fry. It was thought that fry-catchers would be able to increase their earnings through sales of nursed post-larvae and juveniles. The survival of nursed post-larvae in the distribution system would also be increased. However, it is unlikely that tiger shrimp fry nursing can be made profitable. On the other hand, cage culture of a combination of hatchery-reared post-larvae and wild-caught fry of the freshwat er prawn would be profitable. An NGO played an important role in the subproject by implementing technical trials and organizing and supporting participating fisherfolk groups.
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    The Hilsa is the main marine fish captured in Bangladesh. and the Meghna River is the centre of this fishery. Bhola Island. off the east shore of the Meghna, is the home of thousands of fisherfolk who rely on Hilsa for their survival. They mainly use chandi boats in this fishery. This report describes the evolution of the motorization of the chandi boat, in Bhola, between 1980 and 1903. It includes information on the project sponsored by the Danish International Development Agency (DANIDA) and developments in the private sector. The Bay of Bengal Programme’s (BOBP) involvement during this period, supporting project implementation and monitoring the project, permits a technosocioeconomic analysis. which is also part of the report.
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