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Tawilis Summit 2019: “4Ts: Talakayan Tungkol Sa Management Adelina S

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Tawilis Summit 2019: “4Ts: Talakayan Tungkol Sa Management Adelina S Philippine Society for Freshwater Science Aquatic Biology Research Laboratory, Rm 130 Institute of Biology, National Science Complex, University of the Philippines Diliman Quezon City 1101 Philippines (+632) 981 8500 loc 3728 Statement of Support for the Conservation and Sustainable Management Interim Officers 2018-2020 of Sardinella tawilis and of Lake Taal President Francis S. Magbanua, PhD Sardinella tawilis (locally known as tawilis) is the only freshwater species of Sardinella and is only found in Lake Taal, Batangas, Luzon Island, the Philippines. Vice President Rey Donne S. Papa, PhD Recently, the International Union for the Conservation of Nature (IUCN) has classified tawilis as endangered. Corresponding Secretary Teresita R. Perez, PhD In the assessment of a taxon’s threatened category, IUCN follows its well- Recording Secretary established, regularly-updated guidelines. In the case of tawilis, IUCN based its Jhoana M. Garces, MS evaluation using criteria A2bd, which is on population reduction measured over the Treasurer longer 10 years or 3 generations, and B1ab and B2ab, which are the extent of Jhaydee Ann Pascual, MS occurrence (EOO) and area of occupancy (AOO), respectively. Business Manager: Daniel Edison Husana, PhD On December 11, 2018, the Philippine Society of Freshwater Science (PSFS), a Auditor professional association whose members are from the academe, research Ma. Vivian C. Camacho, institutions, environmental organizations, government agencies, and civil society PhD engaged in the promotion of scientific knowledge and stimulation of scientific Public Relations Officer investigation for the advancement of freshwater science in the Philippines, was Milette U. Mendoza, MSc established. Liaison Officer Jonathan Carlo A. Briones, On February 19, 2019, the PSFS, together with the University of Santo Tomas PhD Department of Biological Sciences (UST), University of the Philippines Diliman Division Heads: Institute of Biology (UP), Department of Agriculture-National Fisheries Research and Systematics and Evolution Development Institute (DA-NFRDI), Department of Agriculture-Bureau of Fisheries Jonas Quilang, PhD and Aquatic Resources (DA-BFAR), and the Department of Environment and Natural Conservation and Resources (DENR), organized the Tawilis Summit 2019: “4Ts: Talakayan Tungkol sa Management Adelina S. Borja, MSc Tawilis at Taal.” Invasive Species Data presented during the Tawilis Summit 2019 that formed the basis for classifying Adelaida Palma, DFT tawilis under the Endangered category, indeed show a decline in the tawilis catch Inland Fisheries and since 1998 and that harvest dropped by about 49% over the past 10 years. Aquaculture Ma. Lourdes C. Aralar, PhD Moreover, Lake Taal, which is the habitat of the tawilis, has a surface area of only Physical Limnology 244 km2. Therefore, the area of occurrence (AOO) of this Lake Taal endemic fish is Augustus C. Mamaril, MSc less than 244 km2 and its extent of occurrence (EOO) is 297 km2 that are way smaller Freshwater Ecology than the thresholds of < 5,000 km2 and < 500 km2, respectively. Given these and the Daniel Edison Husana, PhD Philippine Society for Freshwater Science Aquatic Biology Research Laboratory, Rm 130 Institute of Biology, National Science Complex, University of the Philippines Diliman Quezon City 1101 Philippines (+632) 981 8500 loc 3728 continuing declines in the number of mature individuals presented above, tawilis Interim Officers 2018-2020 has been categorized as Endangered. President Based on two separate studies on the reproductive biology of tawilis, data show Francis S. Magbanua, PhD that spawning season peaks during the months of March and April. Similarly, it was Vice President observed that during the spawning season, tawilis are mostly found nearshore Rey Donne S. Papa, PhD where the “macrophytes” are located. Coincidentally, these areas will likewise be Corresponding Secretary affected in the planned circumferential road to be built around Lake Taal. Teresita R. Perez, PhD Recording Secretary Given the situation and conditions connected with the declining tawilis catch and Jhoana M. Garces, MS habitat quality of Lake Taal, we the members of the Philippine Society for Treasurer Freshwater Science support for the conservation and sustainable management of Jhaydee Ann Pascual, MS Sardinella tawilis and Lake Taal through the following measures: Business Manager: Daniel Edison Husana, PhD 1. Implementation of the PAMB ordinances for close season during the months of March and April, the implementation of a recommended mesh-size for fishing, Auditor Ma. Vivian C. Camacho, and establishment of tawilis sanctuary areas in Lake Taal; PhD 2. Law enforcement should be multisectoral and should include the participation of Public Relations Officer government agencies such as DENR, NFRDI, BFAR, LGUs and the fisherfolk Milette U. Mendoza, MSc organizations including those involved in aquaculture practices; Liaison Officer 3. Regular, long-term monitoring of the lake in terms of catch per unit effort, water Jonathan Carlo A. Briones, quality parameters, and aquaculture practices through the continued efforts of PhD the government agencies such as NFDI, BFAR and other researchers; Division Heads: 4. Progress report and discussion after one year of implementation of programs and Systematics and Evolution policies should be done to evaluate success and effectiveness of management Jonas Quilang, PhD initiatives; and Conservation and 5. Research program, participated in by Batangas-based Higher Education Institutes Management Adelina S. Borja, MSc including State Colleges and Universities with funding from the national government and other institutions, with the aim of getting tawilis off the IUCN Invasive Species Adelaida Palma, DFT red list. 6. Reconsider the location and construction of the Taal Lake Circumferential Road Inland Fisheries and Aquaculture (TLCR), which, according to current plans, is too close to the lakeshore areas. The Ma. Lourdes C. Aralar, PhD placement of this road would have a negative impact on littoral vegetation, which Physical Limnology the tawilis and other aquatic organisms in Lake Taal (including the Lake Taal sea Augustus C. Mamaril, MSc snake, Hydrophis semperi) utilize heavily as their breeding grounds or actual Freshwater Ecology habitat. Daniel Edison Husana, PhD .
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