The ecological impact of tilapia cage culture in Sampaloc Lake, Philippines
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Sampaloc lake showed imminent biological death as a consequence of intensive tilapia farming in floating net cages. The progressive disappearance of dissolved oxygen in the entire water column may be an irreversible trend due to continuous feeding. The high amount of BOD5 and the near toxic concentration of total ammonia and total sulphides are ominous signs. Other ecological changes in the lake are the non-appearance of Microcystis bloom, change in phytoplankton composition, number, and species diversity.
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Santiago, Alejandro E.; Arcilla, Renato P. (Springer Verlag, 1993)The 28-hectare tilapia cage culture that occupied the 104-hectare Sampaloc Lake, a crater lake, shifted to intensive method in 1986 when tilapia growth slowed done at the beginning of 1982. Thus, commercial feeds became ...
Bautista, Antonio M. (Aquaculture Department, Southeast Asian Fisheries Development Center, 1984)Guidelines are given for the cage culture of tilapia in lakes in the Philippines. The following major topics are covered: site selection; cage design and layout; operation and management tips.
Effects of initial stocking size on the growth of Nile tilapia fingerlings in cages without supplemental feed in Laguna Lake, Philippines Basiao, Zubaida U. (University of the Philippines, 1988)Oreochromis niloticus fingerlings were stocked at three different initial size ranges of 1-3, 7-12 and 20-30 g in fixed net cages in Laguna Lake, Philippines. These were reared without supplemental feed for 120 days. ...