Report of the 4th Meeting of the Scientific Working Group on the Stock Assessment of Neritic Tuna in Southeast Asian Waters in Kuala Lumpur, Malaysia from 7 to 9 November 2017 by the Secretariat of the Southeast Asian Fisheries Development Center (SEAFDEC). The document is distributed to meeting participants, SEAFDEC Member States, SEAFDEC Divisions and relevant institutions. Report of the 4th Meeting of the Scientific Working Group on the Stock Assessment of Neritic Tuna in Southeast Asian Waters, Kuala Lumpur, Malaysia, 7-9 November 2017, Southeast Asian Fisheries Development Center.
Report of the fourth meeting of the Scientific Working Group on the Assessment of the Neritic Tuna Stock in Southeast Asian Waters.
Introduction
Opening of the Meeting
Introduction and Adoption of the Agenda
Review/progress on Stock Assessment of Neritic Tunas including Seer fishes by
Nishida suggested that the king mackerel and seer fish statistics should include all seer fish species. Sallehudin Jamon presented the current and updated status of Neritic Tunas and seer fishes in Malaysia (Appendix 8). In 2016, Neritic tuna and seer fish contribute to Malaysia's marine fish landings with 4.7% and 1.1% respectively.
It was also proposed that the number of FADs in Malaysian water may need to be better managed to balance the catch of neritic tuna and skipjack. The need to specify species for neritic tuna and sawfish was also highlighted and SEAFDEC/TD offered to help improve data collection. Sherryl Mesa presented the current status of Philippine Neritic Tuna and Shikfish (Appendix 9 and 10).
The data on neritic tuna and seer fish in the Philippines was collected by the National Stock Assessment Program (NSAP). Nishida also informed that the inventory of seer fish will also be started in the next two years.
Review/progress of the Genetic Study and Improve Data Collection
A general discussion was held on the need to take inventory structure into account when calculating MSY and inventory status, and on the need for good input data. The result of the last SWG meeting showed that the spawning biomass (SSB) for Kawakawa was in the green zone but close to the MSY in the Indian Ocean, but much higher and in the green zone in Pacific waters . Longtail tuna in the Indian Ocean is in the red zone and close to the MSY, while in the Pacific Ocean this species is in the green zone and above the MSY point.
Currently, these species are believed to have two lineages, one in the Indian Ocean and one on the South China Sea/Pacific Ocean. Although this may change in the future, any assessments of the MSY should be based on the stock structure, even if national/regional assessments can be done to get a snapshot of the regional situation. Therefore, all the member states should be ready with the input data on the specific species from this time.
In the discussion, it was recommended that some additional samples from the west coast of Thailand be collected and also that the results be compared with the genetic result from the Philippines, if available. The IOTC is currently collecting neritic tuna genetics samples in the Indian Ocean and the program has funding that IOTC member countries can apply for.
Apply the Stock and Risk Assessment of LOT and KAW to sub-region
Maybe if the result was the same, the management strategy can be started and can be proposed for ASEAN meeting for management on neritic tuna in the region. However, SWG needs to be standardized and finalized to use the best method for stock assessment of neritic tuna in the region as suggested by Dr. The representative of the Philippines also reported that their time series of data were not consistent when the effort was applied as needed in the analysis.
Jacob Hagberg suggested optimizing the method so that the assessment of neritic tunas in the region can be fully utilized. Collecting data and latest information from SEAFDEC could be an important exercise to pre-determine the neritic tuna stock in the region. The representative of the Philippines requested clarification on the type of effort used for the calculation throughout the process.
Amnuay Kongprom provided the concept on "Efforts to reduce management measures simulating data from Thai DoF" this concept is to use the percentage of overfishing for each country separately from the percentage that can be converted to catch. Reviews of the preparatory work on the stock and risk assessment of the Southeast Asian sawfish by Dr Tom Nishida.
Reviews on preparatory work on Stock and Risk Assessment of Seer Fish in the
The Assembly was informed that the FADs management issue was raised to manage the tuna and other pelagic resource and Malaysia requested SEAFDEC to study on this. Nishida explained that the exact unit of effort could not be answered yet, depended on the detail and trend of effort that was different in each countries and area, this issue should be discussed later. That catch can be referred to each country according to the ratio of regional catch per country, which each country can calculate back to the national effort using their own standard CPU.
The effort can be separated by equipment by their own national data, where the management measure will be determined by the country itself. Jacob Hagberg suggested that another possible way to monitor catch by country is to use the CPUE trend. The management measure of catch reduction or other necessary options can be implemented as a precautionary measure when the trend of CPUE decreases.
This choice seems to be suitable for both socio-economic and biologically based management.
Reviews other activities and work plan for Research, Capacity Building and
The representative from Thailand, Mr. Amnuay Kongprom, delivered the concept of "The effort-reducing management measure simulation of data from Thai DoF" this concept is to use the percentage of overfishing for separately for each country with the percentage that can be converted to catch. Perhaps this could also be a good exercise for the preparation of stock assessment for seerfish in the next two years. A few suggestions had been raised to upgrade the data collection, such as: .. i) Some collaboration with the Statistical Working Group on data collection and data mining. ii).
Samsudin Basir suggested that a time should be set for the stock assessment result to be forwarded to the highest level in the same year so that advice can be obtained. The representative from Cambodia expressed interest in capacity building and will do his best to contribute to the stock assessment for neritic tuna and also seefish in the future. The meeting therefore recognized the need for capacity building especially for species identification and data analysis for a country such as Cambodia, therefore further discussion on the budget was necessary especially when high value species such as seer fish were involved.
The meeting also agreed that there was a need for a special workshop for data standardization for data collection. The meeting had agreed that the next SWG meeting will be hosted by Indonesia and the meeting was proposed in the first week of October or November 2018.
Introduction: Risk Assessments for Neritic Tunas in Southeast Asia
Nishida had emphasized to all SWG members the importance of CPUE input data for stock assessment using ASPIC analysis. Therefore, follow-up action was needed to compile and extract data according to the country's requirements. He also added this issue as one of the main concerns during the IOTC meeting.
The Chief of SEAFDEC/MFRDMD had emphasized the importance of learning the software analysis for stock and risk assessment so that all countries can work on their own data analysis for their own assessment in the future. However, the general view was that the current estimate was still valid and that there were no plans or resources to update the data and re-estimate during 2018, which will instead be dedicated to seerfish (king mackerel).
Risk Assessments for Neritic Tunas in Southeast Asia
Closing of the Meeting
Firdaus Siregar bin Abdullah E-pošta: [email protected] Nurul Nadwa bint Abdul Fatah (ga.) E-pošta: [email protected].
It is expected that participants will upgrade their knowledge of risk assessment, which is also important for the management of these species. Therefore, these meetings and training programs will not only provide us with essential knowledge, but also an excellent opportunity to share experiences on both technical and regulatory issues on risk assessments and fisheries management framework/measures for our target species. Finally, I would like to take this opportunity to sincerely thank the organizing committee and especially our respected colleague Dr. Tom Nishida.
I hope this meeting and training program will be useful, interesting and useful for our future work, and I hope you have a pleasant stay in Kuala Lumpur. Finally, in the name of Allah, the Most Merciful and Merciful, I would like to declare our SWG meeting and training session on Longtail Tuna and Kawakawa in Southeast Asia officially open.
