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PANGASINAN, Philippines – Officials have recorded a series of fish kills in Dagupan City due to abrupt changes in temperature this summer.
Dr. Westly Rosario, chief of Bureau of Fisheries and Aquatic Resources-National Integrated Fisheries Technology and Development Center in Dagupan, said bangus (milkfish) in fish pens in the municipality have gone into “thermal shock.”
He said extreme heat followed by rainfall stressed the fish, causing them to die.
He explained that the change in weather affected the salinity of the water in the fish pens, killing microorganisms. He said oxygen supply went down as the microorganisms decomposed.
Rosario said water quality in some fish pens was bad.
He advised bangus growers not to wait for Holy Week, when prices are high, to harvest their produce. He said they must also lessen the biomass of their stocks. – Rappler.com
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