National Committee on Marine Sciences (NCMS)
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- Individual and interactive effects of ocean warming and acidification on adult Favites colemaniTañedo, Mikhael Clotilde S.; Villanueva, Ronald D.; Torres, Andrew F.; Ravago-Gotanco, Rachel; San Diego-McGlone, Maria Lourdes (Frontiers Media SA, 2021-09-09)Tropical coral reefs are threatened by local-scale stressors that are exacerbated by global ocean warming and acidification from the post-industrial increase of atmospheric CO2 levels. Despite their observed decline in the past four decades, little is known on how Philippine coral reefs will respond to ocean warming and acidification. This study explored individual and synergistic effects of present-day (pH 8.0, 28°C) and near-future (pH 7.7, 32°C) scenarios of ocean temperature and pH on the adult Favites colemani, a common massive reef-building coral in Bolinao-Anda, Philippines. Changes in seawater temperature drive the physiological responses of F. colemani, whereas changes in pH create an additive effect on survival, growth, and photosynthetic efficiency. Under near-future scenarios, F. colemani showed sustained photosynthetic competency despite the decline in growth rate and zooxanthellae density. F. colemani exhibited specificity with the Cladocopium clade C3u. This coral experienced lower growth rates but survived projected near-future ocean warming and acidification scenarios. Its pH-thermal stress threshold is possibly a consequence of acclimation and adaptation to local environmental conditions and past bleaching events. This research highlights the importance of examining the susceptibility and resilience of Philippine corals to climate-driven stressors for future conservation and restoration efforts in the changing ocean.We are grateful to the Marine Biogeochemistry Laboratory and Bolinao Marine Laboratory of the Marine Science Institute, University of the Philippines for the valuable logistical and laboratory support provided. We would also like to thank Drs. Haruko Kurihara, Atsushi Watanabe, and Toshihiro Miyajima for the design of the mass flow controller used in the experiments. This is UP-MSI contribution number 484.
- Phosphorus as a driver of nitrogen limitation and sustained eutrophic conditions in Bolinao and Anda, Philippines, a mariculture-impacted tropical coastal areaFerrera, Charissa M.; Watanabe, Atsushi; Miyajima, Toshihiro; San Diego-McGlone, Maria Lourdes; Morimoto, Naoko; Umezawa, Yu; Herrera, Eugene; Tsuchiya, Takumi; Yoshikai, Masaya; Nadaoka, Kazuo (Elsevier, 2016)The dynamics of nitrogen (N) and phosphorus (P) was studied in mariculture areas around Bolinao and Anda, Philippines to examine its possible link to recurring algal blooms, hypoxia and fish kills. They occur despite regulation on number of fish farm structures in Bolinao to improve water quality after 2002, following a massive fish kill in the area. Based on spatiotemporal surveys, coastal waters remained eutrophic a decade after imposing regulation, primarily due to decomposition of uneaten and undigested feeds, and fish excretions. Relative to Redfield ratio (16), these materials are enriched in P, resulting in low N/P ratios (~ 6.6) of regenerated nutrients. Dissolved inorganic P (DIP) in the water reached 4 μM during the dry season, likely exacerbated by increase in fish farm structures in Anda. DIP enrichment created an N-limited condition that is highly susceptible to sporadic algal blooms whenever N is supplied from freshwater during the wet season.
- Who killed the milkfish?Cardinoza, Gabriel (Philippine Daily Inquirer, Inc., 2011-06-08)They're stubborn. These are the words of Nestor Domenden, regional director of the Bureau of Fisheries and Aquatic Resources (BFAR) when asked why fishkills have been a recurring nightmare in Bolinao and Anda towns in western Pangasinan in the last 10 years. “They (milkfish growers) know where their fishing structures should be built, but they continued to disregard it,” Domenden says. A report from the office of the provincial agriculturist in Lingayen shows that 72 of the 75 fishkill-hit cages were built in the waters off Catubig Point in Barangay Tara up to Barangay Culang in Bolinao, while the rest, mostly bamboo pens, dotted the fishing area from Barangay Mal-ong to Barangay Awag and across the Kakiputan Channel to the island village of Siapar in Anda.
- Red tide alert still on in Bataan coastal watersCervantes, Ding; Visperas, Eva (Philippine Star Printing Co., Inc., 2014-05-22)Red tide has plagued the coastal waters of Bataan for six months now and is showing no signs of waning. The Bureau of Fisheries and Aquatic Resources (BFAR) yesterday issued another appeal to the public to refrain from gathering and eating shellfish from one city and seven towns of Bataan. Red tide toxin, which causes paralytic shellfish poisoning remains present in these areas,†said Lanie Lamyong, information officer of the BFAR regional office.
- BFAR assures enough supply of bangus amid Pangasinan fishkill(Manila Bulletin Publishing Corporation, 2018-06-08)The Bureau of Fisheries and Aquatic Resources (BFAR) in the Ilocos region has assured that there is an ample supply of milkfish (bangus) for the region and other regions, despite the recent fishkill in the towns of Anda and Bolinao. BFAR Regional Director Nestor Domenden, in an interview during a fisheries forum on Wednesday, revealed that less than 1 percent of the region's total production for the year was lost due the fishkill. Domenden said the region is self-sufficient in bangus production and can continue supplying the needs of other areas, including Metro Manila, as the region is 127 percent sufficiency.
- Red tide still up in Bolinao and AndaIñigo, Liezle Basa (Manila Bulletin Publishing Corporation, 2017-05-13)Coastal waters of the towns of Bolinao and Anda, in this province, are still affected by the red tide, making shellfish gathered in these areas poisonous to humans, authorities said yesterday. Local officials have advised residents as well as visitors to the beaches of these towns not to collect, harvest, transport, or eat shellfish from these coastal areas because they are still positive of paralytic shellfish poison. Based on the latest Shellfish Bulletin No. 16 issued by the Bureau of Fisheries and Aquatic Resources (BFAR) last May 10, BFAR Director Eduardo Gongona said samples of shellfish collected in the two towns tested positive for paralytic shellfish poison beyond the regulatory limit.
- BFAR raises red tide alert in Biliran, IloiloGonzales, Anna Leah E. (Philippine Manila Standard Publishing, Inc., 2016-11-12)The Bureau of Fisheries and Aquatic Resources has raised the red tide alert over the coastal waters of Naval in Biliran Island Province and Gigantes Islands in Carles, Iloilo. Agriculture Undersecretary for Fisheries and BFAR Director Eduardo Gongona said all types of shellfish from these areas are not safe for human consumption. “Fish, squids, shrimps and crabs are safe for human consumption provided that they are fresh and washed thoroughly, and internal organs such as gills and intestines are removed before cooking,” Gongona said.