National Committee on Marine Sciences (NCMS)
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- Insights into the environmental conditions contributing to variability in the larval recruitment of the tropical sardine Sardinella lemuruPata, Patrick R.; Yñiguez, Aletta T.; Deauna, Josephine Dianne L.; De Guzman, Asuncion B.; Jimenez, Cesaria R.; Rosario, Roselle T. Borja-Del; Villanoy, Cesar L. (Elsevier, 2021-07)The small pelagic fishery in the southern Philippines is one of the largest contributors to fisheries production in the country, and is dominated by the Bali sardine Sardinella lemuru. This species is a year-round spawner that has its peak spawning period during the northeast monsoon (NEM) months of November to February. However, there is still limited information on the conditions that affect this species’ survival during its early life history stages. Here, we attempt to discern the importance of temperature, prey density and advection on sardine larvae. The larvae were represented as passive particles that were released in known spawning grounds to simulate dispersal. The conditions the larvae experienced, namely, temperature and estimated prey density based on satellite chlorophyll-a values were recorded at each time step until the estimated recruitment age of 60 days. The temporal and spatial averaged conditions of recruited sardines showed that sardines spawned during the NEM months experienced higher chlorophyll-a, lower (more optimal) sea surface temperature, albeit higher advective loss, than sardines spawned during other months. Comparisons between years showed that during higher reported catch years, sardine larvae experienced lower temperatures and higher retention nearshore. Our results emphasize that sardine stock management efforts need to recognize the contribution of the temporally variable sardine environment to patterns in sardine recruitment and consequently in catches.The authors would like to thank Dr. Wilfredo Campos, Luke Felix, Dr. Rio Naguit, Denmark Recamara, and the Research for Sardines Volunteer Program (RSVP) volunteers for sharing sardine fisheries data; Arjay Cayetano for helping start the model used; and Iris Salud Bollozos for useful insights on larval ecology. This study was fully funded by the Department of Science and Technology–Philippine Council for Agriculture, Aquatic and Natural Resources Research and Development (DOSTPCAARRD) under the program, “Development of robust tools for managing sardine fisheries in the Philippines: Zamboanga Upwelling Bohol Sea System Program.” The authors declare no conflict of interest.
- Int’l body accused of economic sabotage for listing Tawilis as endangered speciesMiraflor, Madelaine B. (Manila Bulletin, 2019-02-06)Switzerland-based International Union for Conservation of Nature (IUCN) has been accused of economic sabotage for listing Sardinella Tawilis, the only freshwater sardine in the world, as an endangered species, stakeholders said. The United Stakeholders of Taal Lake, which includes fishermen, vendors, restaurant owners and residents of communities surrounding Taal Lake, has “strongly condemned” the IUCN’s report in a position paper. IUCN said in its report that Tawilis, which is endemic to Taal Lake, has become endangered “due to overexploitation, pollution, and predation with introduced fishes, resulting in continuing declines in habitat quality and number of mature individuals”.
- Increased sardines supply in W. VisayasMomblan, Gail T. (Daily Guardian Multi-Media Services, Inc., 2018-11-29)The Bureau of Fisheries and Aquatic Resources (BFAR)-6 reported a 1.2 percent increase in the supply of sardines in Western Visayas. The BFAR stock assessment data indicated that the region produced 28, 523 metric tons of sardines in 2017, a way higher that the 28, 185 metric tons produces in 2016. Remia Appari, BFAR-6 regional director, assured that Western Visayas has a steady supply of sardines.