http://hdl.handle.net/20.500.12067/1100 2026-03-16T17:08:38Z 2026-03-16T17:08:38Z http://hdl.handle.net/20.500.12067/837 2022-04-27T08:47:37Z 2010-01-01T00:00:00Z

National Report on Bycatch Management and Reduction of Discard , Jakarta The issue of bycatch and discards in the trawl fisheries involving small-scale boats is significantly different from the trawl fisheries conducted by industrial fishing companies. Shrimp is the most expected catch among small-scale trawl fishermen and the bycatch is dominated by groundfish, such as members of Leiognathidae, Haemulidae, Mullidae, and Scianidae. The bycatch can be sold by fishermen to buyers who will either resale it or process it into dried or salted fish or became fish meal. Since not all bycatch are kept onboard (by fishermen), the rest will be returned to the sea as discards. It is well demonstrated that in trawl fisheries targeting shrimps, the proportion of bycatch far exceeds the proportion of the shrimps. Therefore, discards has become one of big issues in the trawl fisheries, especially the one that is conducted by fishing companies operating large sized trawlers. This situation is particularly applicable to the trawl fisheries at Sorong. In some regions, the small-scale fishermen may have no specific target species because the populations of those species are at a low level. To them, any catch is valuable and worth to be retained. Therefore, discards is not an important issue. Fishermen now consider the catch of earlier target species merely as a bonus because they do not expect to catch them anymore. This situation is likely observed in the northern Java trawl fisheries (Cirebon, Tegal and Brondong) and Bengkulu (Sumatera). In other regions, small-scale fishermen are more confident with successful trawling since their main target species are still abundant. To them, shrimp is often the most valuable catch while certain type of fish are interesting to them only to be kept for family’s meal (e.g. Indian mackerels) or to be distributed in their neighborhood. However, by-catch is not an issue since most of those fish are sold to local fish processors. The fishing intensity conducted by the small scale fisheries is not as intensive as that carried out by industrial trawlers. The issue of potential discards is less relevant than the discards resulted from the operation of the industrial trawlers. This situation is commonly found in the trawl fisheries in Tarakan, Kotabaru and Pontianak. While the trawl fisheries mentioned above are concentrated to catch shrimps, the trawl fisheries in Belawan are targeting various types of demersal fish. The fish trawls consequently produce less by-catch since their catch is dominated by their targets which are multi-species of finfish. Certainly if they accidentally catch some shrimps, they will retain the by-catch on-board. Fishermen are likely concerned when the catch is dominated by small-sized fish individuals of no market value. The three types of potential strategies to manage the by-catch issues are: (1) adjusting trawl operations according to natural spatial and temporal distribution of the target species and its associated fish assemblages, (2) improvement of fishing methods to reduce the likelihood of unwanted fish retained by fishing gear or improvement of fishing selectivity, and (3) directing fish transaction to certain quality of fish that promote protection of young or small fish from early exploitation.

2010-01-01T00:00:00Z Rafael V., Ramiscal Dickson, Jonathan O. http://hdl.handle.net/20.500.12067/836 2023-04-20T03:50:49Z 2010-01-01T00:00:00Z

Bycatch Management and Discard Reduction Strategies National Report - Philippines Rafael V., Ramiscal; Dickson, Jonathan O. Capture fisheries in the Philippines is administratively divided into commercial and municipal sectors on the basis of vessel gross tonnage. As defined in the Philippine Fisheries Code of 1998, commercial fisheries include fishing operations that use vessels of over 3 gross tons (GT). Municipal fisheries, on the other hand, involve the use of vessels of 3 GT or less, including operations that do not involve the use of fishing boats. Municipal fisheries roughly translate to traditional, artisanal or small-scale fisheries, while the commercial fisheries correspond to the industrial or large-scale type fisheries.

2010-01-01T00:00:00Z http://hdl.handle.net/20.500.12067/807 2021-05-20T04:11:54Z 2008-01-01T00:00:00Z

National Report on By-catch Management and Reduction of Discards PROPOSED REVISED OUTLINE National Report on by-catch management and reduction of discards Collection of biological and socio-economic data/information to define the strategies for by-catch management plan, and this will include by-catch composition, volumes, values and utilization. These data will be needed to evaluate the possible impact on the fishery resources, livelihood and security

2008-01-01T00:00:00Z Supongpan, Mala Boonchuwong, Pongpat http://hdl.handle.net/20.500.12067/806 2023-04-20T03:50:49Z 2010-05-28T00:00:00Z

Thailand: National Report Bycatch Management in Trawl Fisheries in the Gulf of Thailand Supongpan, Mala; Boonchuwong, Pongpat The report is synthesized and reviewed background of the trawl fisheries in the Gulf of Thailand using existing primary and secondary data sources and scientific reports. It covers fishery biology, fishing ground, species and sizes caught, geographic area, fishing capacity, fishing effort, fish production, fish distribution, fishing gear and method, exploitation state, fish stock assessment, conflicts in fisheries, season and area closure, legal framework and institutional arrangement, production and value trend for demersal and trash fish, market and utilization, employment, fishing rent and other social economic issues. The fish stocks especially for demersal resources in the Gulf of Thailand are already overexploited. These resources are caught mainly by trawl gear which comprises trash fish almost half of the landing catches. These trashfish are identified into about 35% of juvenile economic fish in trash fish component. The management of bycatch (trashfish) should be conducted in terms of scientific evidences with fisher and stakeholder participation in collaboration with relevant agencies. Future project plan activities are formulated to reduce juvenile economic fish, protect area for spawner and nursing ground as well as using VPS in monitoring illegal fishing around existing season and area closure. The experiment and demonstration of enlargement of cod end mesh size of trawl net, demonstration to install JTED in trawl net, Using VPS for monitoring and enforcement, closed area and closed season demarcated area, bycatch utilization management, office renovation and increase awareness and strengthening capacity in legal framework activities are all project plans for Thailand. Financial framework plan in term of co-finance of the Department of Fisheries and private sector (The Fisheries Association of Thailand) is formulated to request fund from GEF for implementing the seven activities for 4 years project to support bycatch management from trawl fisheries in the Gulf of Thailand.

2010-05-28T00:00:00Z