70 Trans. Nat. Acad. Sci. & Tech. (Philippines) Vol. 40 (No. 1)
AS – 68
WATER QUALITY AND ECONOMIC PRODUCTIVITY
OF FISH CAGE OPERATION
IN LUMOT LAKE, CAVINTI, LAGUNA
Zaldy O. Luna and Keycelien E. Arroyo
College of Agriculture Southern Luzon State University Lucban, Quezon
This paper presents a baseline data of the economic productivity
and water quality of Lumot Lake in Cavinti, Laguna. The economic
productivity of fish cage operations in the research site was measured
through a simple Cost Return Analysis. The yield of fish cage operators in
the lake were computed through the data gathered from surveys and direct
interview with the respondents. The data obtained from the fish cage
operators showed high fish (Tilapia) production in the lake. Water quality
parameters (i.e., temperature, transparency, pH, dissolved oxygen, salinity)
were measured using specific instrument, while water hardness and
nitrogenous compound (i.e., phosphate and nitrate) were brought to the
laboratory for further analysis. The study further showed that the Lumot
Lake’s water quality was within the standards set by the Environmental
Management Bureau of the Department of Environment and Natural
Resources. The above water quality parameters were also analyzed and
compared with the water quality requirements of tilapia. Results showed that
all of these were within the required limits for the growth and survival of
this fish species.
Keywords: fish cage productivity, water quality, physico-chemical
parameters, economic productivity