National Committee on Marine Sciences (NCMS)
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- Partial mortality in Porites corals: Variation among Philippine reefsWesseling, Ineke; Uychiaoco, Andre J.; Aliño, Porfirio M.; Vermaat, Jan E. (Wiley, 2001-01)Partial mortality or tissue necrosis was quantified in the massive scleractinian coral Porites at three sites in The Philippines (Bolinao, NW Luzon; Puerto Galera, Mindoro; and El Nido, N Palawan). Overall, 15 ± 1 (mean ± 1 standard error, 642 replicates) percent of colony area was dead, mean colony area was 1135 plusmn; 127 cm2, and lesion density was 1.7 ± 0.1 dm—2. Total live coral cover varied between 20 and 63% in belt transects, and Porites and Acropora cover were inversely correlated. ANOVA models incorporating effects of site, colony size, sedimentation rates, wave exposure and depth were highly significant but explained only a small proportion of the variation observed in lesion density and percent dead area (respectively 8 and 2%). Lesion density was found to vary significantly with site (contributed 29% to this explained variance), decrease with increasing colony area (33%), and increase with increasing sedimentation (23%) and wave exposure (14%). Colony size was significantly explained by the factor site (contributing 61% to the total 29% explained variance) and depth (34%), with the smallest colonies being observed in Bolinao and the largest in El Nido. Densities of lesions were highest in Bolinao, intermediate in Puerto Galera, and lowest in El Nido. This pattern is parallel to intensity of human reef exploitation and opposite to that in colony size, live coral cover and Acropora cover. Since only a small part of the observed variance in partial mortality estimators was explained by the ANOVAs, other factors not quantified here must have been more important (e.g. disease incidence, predation, human exploitation).
- Age, growth, and population structure of Conomurex luhunuasSanchez-Escalona, Katherine; Aliño, Porfirio (National Fisheries Research and Development Institute, 2022-12)Age and growth dynamics of Conomurex luhuanus were investigated to determine the population structure. Age-specific change in shell shape determined with geometric morphometrics revealed discrimination of shape between 0-3 years old at 99–100% while 3–4 years old can be separated with 81% certainty. Using the age discrimination data, K and L∞ were estimated at 1.00 year and 7.28 cm, respectively. Recruitment is bimodal with natural mortality (M) of 0.71 and fishing mortality (F) approximated at 3.92 year. The exploitation rate (E) is 0.85 year, indicating probable overharvesting of the population under study. The presence of a deep-water population, age-specific burying behavior, and bimodal recruitment pattern are possible resilience factors.The study was supported by a grant from PCAARRD-DOST.
- Fisheries Administrative Order No. 245-1. Series of 2013. Regulations and implementing guidelines on group tuna purse seine operations in high seas pocket number 1 as a special management area.(Department of Agriculture, 2013)The Order provides for conservation, management and sustainable producing bigeye, yellowfin, skipjack tuna stocks in the high seas and exclusive economic zones within the framework of International Convention on the Conservation and Management of Highly Migratory Fish Stocks in the Western and Central Pacific Ocean and adapted local resolutions in Philippines. This Administrative Order covers the registered traditional group seine fishing vessels granted access to the HSP1-SMA which is the area of the high seas bounded by the EEZs of the named Federated States in the Order with exact coordination by Vessel Monitoring System. The Order lays down requirements and criteria needed for any person, corporation or entity who intent to engage in group tuna purse seine operations in HSP-1SMA. Section B of the Order provides for procedure in the allocation of fishing access including letter of intent, preliminary list and allocation. The Order further lays down provisions for observe coverage, vessel monitoring system, reporting, vessel listing, monitoring of port landing, catch limit, net mesh size, nature of access right, use of fish aggregating device and penalties. The text consists of 17 Articles.
- Don't eat dead fish from oil spill-hit areas, BFAR warnsSornito, Ime (Panay News, Inc., 2020-07-08)The Bureau of Fisheries and Aquatic Resources (BFAR) in Western Visayas has issued a warning against eating dead fish in coastal areas contaminated by bunker fuel from a barge damaged by an explosion last week. Remia Aparri, BFAR regional director, said an undetermined volume of dead milkfish (bangus) fingerlings in fish cages were reported in the waters off Barangay Hoskyn in the capital town of Jordan, Guimaras. She explained that milkfish in fish pens are mainly prone to the threat of leaked bunker oil since they cannot swim out to the open sea.
- Fishkill hits cages in Taal LakeCinco, Maricar (Philippine Daily Inquirer, Inc., 2018-11-06)The local government of Agoncillo town in Batangas province will distribute tilapia fingerlings to local cage operators affected by the recent fishkill in Taal Lake. The incidence of “fish mortality,” a term preferred by local officials in referring to a smaller area where fish turn belly up, occurred at Barangay Subic Ilaya, said Agoncillo Mayor Daniel Reyes. He said 105 cages, out of 1,555 operating in the town, were affected, with about P5 million worth of mature and juvenile tilapia killed in a phenomenon called “sulfur upwelling.”