100 tonnes of tilapia (Oreochromis niloticus) have been killed in lake Buhi in the Philippines, the bureau of fisheries and aquatic resources (BFAR) stated, ‘that due to unconsumed feeds, fertilizers and overfeeding from aquaculture’, the waters of the lake became extremely polluted. BFAR found that low oxygen volumes in the lake caused slow growth of the tilapia this eventually decimated the stocks within the lakes on October 29, 2010.
Water monitoring was carried out at at five sampling stations and the lake was found to have a highly toxic substance that had been released into the lakes eco system from the unconsumed feeds and fertilizers. The Lake had very low dissolved oxygen content, very high ammonia nitrogen concentrations and also very high traces of hydrogen sulphide.
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