P6.8 M loss in Taal fishkill.
By Lyka Manalo
BATANGAS CITY-- The municipal-ity of Talisay, Batangas reported that fish cage owners lost more than P6.8 million after the upwelling of sulfur in Taal Lake killed bangus and tilapia last Jan. 29 and 30.
In a press briefing here Friday, Bu-reau of Fisheries and Aquatic Resources- Batangas Inland Fisheries Technology Outreach Station (BFAR) head Nenita Kawit said 99.8 metric tons of fish were killed in Barangay Sampalok.
She said sulfur upwelling was also reported in Balete town but there was no fish kill.
Kawit said sulfur wells up from the lakebed usually during the cold spell from November to February triggered by strong northeasterly winds.
When the lake oxygen level drops and the level of hydrogen sulfide rises, fish kill, occurs, she said.
Sulfur upwelling can be noticed when the lake water becomes bluish-green with sulfur odor.
Dr. Macrina Zafaralla, University of the Philippines Los Banos (UPLB) phy-cologist and environmental scientist, said the carrying capacity of fish cages affects intensity of the sulfur upwelling in the lake.