Water Quality And Fish Production At Pejiru Pond,Bau, Sarawak

Ella, M.D and Ling, Teck Yee and Lee, Nyanti (2006) Water Quality And Fish Production At Pejiru Pond,Bau, Sarawak. In: Proceeding of the 3m Regional Conference on Natural Resources in the Tropics (NRTrop3), 2009.

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Abstract

This study was conducted to determine the water quality and fish production at Pejiru Pond, Bau,Sarawak. Water samples were collected at 7 stations at the subsurface and bottom of the pond four times from July to December 2008. Fish production data was collected in February 2009.Results show that water quality parameters ranged from 42 to 62 em for transparency, 10.2 to102.8 NTU for turbidity, 13.3 to 113.3 mg/L for TSS, 27.7 to 33.3oC for temperature, 1.8 to 15.5 ppm for DO, 6.90 to 7.96 for pH, 0.01 to 0.12 mg/L for nitrate, 0.001 to 0.007 mg/L for nitrite,0.01 to 0.12 mg/L for orthophosphate, 0.05 to 0.34 mg/L for ammonia nitrogen, 0.75 to 14.26 ppm for BODs, and 34.5 to 129.2 ,..g/L for chlorophyll-a. DO in October and December was below 5 mg/L, the minimum required for aquatic organism. Water quality was affected by the input of nutrients from residential areas, oil palm, vegetables and padi farming around the pond through surface runoff during rainfall events. Fish production was low due to fish loss during flooding and the extensive culture practice. It is therefore recommended that cage culture be practised to increase production and lower the feed conversion ratio.

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