Strategy for Trawl Fishery Bycatch Management (REBYC-II CTI) (2011-2014 : SEAFDEC-FAO)
http://hdl.handle.net/20.500.12067/795
The five participating countries in this project Strategies for Trawl Fisheries Bycatch Management (REBYC-II CTI) – Indonesia, Papua New Guinea, Philippines, Thailand and Viet Nam – are part of the Coral Triangle and Southeast Asia region. The Coral Triangle area is one of the most biologically diverse, economically productive and potentially vulnerable marine zones in the world. Increasing populations and exploitation pressures together with growing threats from pollution are a concern for the marine environment and resources of the Coral Triangle as well as of other parts of the Southeast Asia region. At the same time, an important part of the human population in the region is highly dependent on aquatic resources and other goods and services provided by marine ecosystems. The fisheries sector employs millions of people and provides local income as well as foreign exchange earnings. Fish plays a vital role in the region’s food supplies, providing important proteins and other nutrients. 3 Degradation of the marine environment and depletion of fishery resources threaten biological sustainability and diversity as well as food security and livelihoods. This impact is likely to be disproportionately felt by the poor who, directly or indirectly, depend on these aquatic systems for income generation and are the least able to adapt to adverse changes in aquatic resources.2024-03-28T07:32:05ZGulf of Thailand Trawl Experiments Using 4.0 cm Codend Mesh
http://hdl.handle.net/20.500.12067/1709
Gulf of Thailand Trawl Experiments Using 4.0 cm Codend Mesh
Phoonsawat, Ratanawalee; Auksonphaob, Udomsin; Cheuamankong, Thitipon; Panjarat, Sampan
In responce to the depletion of fisheries resources in the Gulf of Thailand, the DOF Thailand, in collaboration with the Food and Agriculture Organization of the United Nations (FAO) and Southeast Asian Fishery Development Center (SEAFDEC) implemented participatory research into the use of increased (4.0 cm mesh size) trawl codend mesh sizes in Chumporn province, Thailand. The study resulted in four sets of analyses: 1) Catch rate, catch composition and escapement rate between current codend mesh size (1.25 – 1.8 cm stretched full mesh lenght) and esperimental 4.0 cm codend; 2) Comparison analysis of revenue from trawling with the current mesh size and 4.0 cm codend; 3) The assessment of overall financial loss, financial gain and impacts of changing the codend mesh size from the current to 4.0 cm; and 4) Length at first capture of fish from the enlarged mesh size. For Pair trawls, comparing catch rates (catch per unit of effort,CPUE) of 1.8 and 4.0 cm codend mesh size, catches of trash fish reduced from 1,053.8 kg/haul (1.8 cm) to 300 kg/haul (4.0 cm) (Table 3). Catches of economically important species increased from 501.5 kg/haul (1.8 cm) to 525.2 (4.0 cm) kg/haul. Overall income was found to be higher For Otter board trawls, comparing catch rate (CPUE) of 1.25 cm and 4.0 cm codend mesh size,there was a reduced catch rate (76 kg/haul) with the larger mesh size. In particular, there was a significant reduction of the trash fish catch rate from 64.7 kg /haul to 16.7 kg. Catches of demeral and pelagic fish increased but catch of squid and shrimp remained constant. There was a remarkable increase of shellfish, from 0.3 kg/haul in 1.25 cm codend to 16.6 kg/haul in the codend with mesh size of 4.0 cm. Revenue from shellfish was able to offset lost income from trash fish and others. Comparisons with an earlier DoF Study on catch rate and species composition of research vessel (Promong 1) during 2010-2013 showed that catches by the fisheries research vessel were not significantly different to catches from local otter board trawls, 158.5 kg/haul. However, escapement rates from the 4.0 cm codend, calculated as 47 % were higher, possibly because of the shorter towing time (1 hour), used in the experiment. The study suggests potential positive benefits by releasing juveniles of economic species through a larger codend mesh size. The study showed that no matter what composition and size of catch, the escape rate of juvelines increases when the mesh size is increased. However, the study suggests that changing codend mesh size would not alone allow for a significant replenishment of the fisheries resources, even if mesh size was increased to 4.0 cm. The reduced catch of juveniles and small sized trash fish would not dramatically impact fisher’s income. In addition, there would be positive impacts including reduced catch sorting time, increased catch quality and higher price of catch, reduced crew costs due to the decrease in the amount of sorting of catch onboard. By using increased mesh it is possible also to reduce the costs of ice and reduce the fuel use, which are major costs for trawl operators. However considering the decrease in catches, many trawl fishers do not seem to be willing to modify codend mesh size to 4.0 cm.
2016-09-01T00:00:00ZProject Achievements and Policy Recommendations For Vietnam
http://hdl.handle.net/20.500.12067/1467
Project Achievements and Policy Recommendations For Vietnam
The purpose of the policy brief is to provide key information and recommendations to policy and decision makers, fisheries managers, fisheries resource users and other relevant stakeholders on issues, challenges and opportunities to improve the management of trawl fisheries. This should in the long run lead to healthier fish stocks and habitats, increased economic benefits from resource use, and sustainable development.
2015-01-01T00:00:00ZReport Data Collection of Trawl Fisheries bycatch in Kien Giang, Vietnam
http://hdl.handle.net/20.500.12067/1465
Report Data Collection of Trawl Fisheries bycatch in Kien Giang, Vietnam
This report presents the outcomes of catch and bycatch data collection in Vietnamese trawl fisheries within the framework of the project “Strategies for trawl fisheries bycatch management” (REBYC-II CTI). The study involved the on board catch sampling of the bottom otter trawl fishery and the pair trawl fishery in Kien Giang province in Vietnam.
Results show that trawl catches are composed of a large number of species and with a very high bycatch proportion (accounting for about 50% of the total catch). High amount of bycatch creates various difficulties in management perspectives and have to be addressed. It is proposed that a routine bycatch sampling and data collection scheme at Kien Giang province is established. In addition, better trawl fishery management regime, including the development and approval of trawl fishery management plan to reduce fishing effort on these fisheries, will be necessary.
2015-01-01T00:00:00ZA National Workshop to Terminate The REBYC-II CTI Project Phu Quoc, Kien Giang, Viet Nam
http://hdl.handle.net/20.500.12067/1460
A National Workshop to Terminate The REBYC-II CTI Project Phu Quoc, Kien Giang, Viet Nam
The workshop aims to: (i) To share lessons learned during the implementation of the REBYC-II CTI project, with the stakeholders interested in trawl fisheries in Viet Nam; (ii) To summarize the national/provincial level impacts of the Project on trawl fisheries management; (iii) To recommend and propose future actions by all stakeholders for better trawl fisheries management in Viet Nam and (iv) To discuss what to be prepared such as administrative procedures for closing the project in Viet Nam. Participants are mainly from local authorities who then can provide feedback through their points of view on the project implementation. In addition, participants could recommend better solutions to effectively and sustainably manage trawl fisheries at the local and national level. The agenda of the meeting is indicated in the APPENDIX 2. This report gives the record of the workshop and the major outcomes.
2016-01-01T00:00:00Z