TY - JOUR ID - 64625 TI - Comparisons of Water Quality near Cage Culture Sites in Batang Ai Reservoir, Sarawak, Malaysia JO - Iranica Journal of Energy & Environment JA - IJEE LA - en SN - 2079-2115 AU - Ling, T. Y. AU - Nyanti, L. AU - Nurul-Safinaz, M. K. AU - Sim, S. F. AU - Grinang, J. AD - Department of Chemistry, Faculty of Resource Science and Technology, 94300 Universiti Malaysia Sarawak, Malaysia AD - Department of Aquatic Science, Faculty of Resource Science and Technology, 94300 Universiti Malaysia Sarawak, Malaysia AD - Institute of Biodiversity and Environmental Conservation, 94300 Universiti Malaysia Sarawak, Malaysia Y1 - 2016 PY - 2016 VL - 7 IS - 2 SP - 169 EP - 176 KW - aquaculture KW - Dissolved oxygen KW - nitrogen KW - Phosphorus KW - chlorophyll-a KW - Trophic state DO - 10.5829/idosi.ijee.2016.07.02.13 N2 - New development and expansion of cage culture at Batang Ai Reservoir would require investigation of the water quality. Therefore, the objective of this study was to determine the water quality at three existing aquaculture sites, one abandoned site, and one station without cage culture at three different depths. This study was carried out in October 2013 during the rainy season. Water quality was measured in-situ and water samples were collected and analyzed according to standard methods. Results showed that dissolved oxygen concentrations at the surface is sufficient for healthy aquatic organisms. However, dissolved oxygen at 10 m is not suitable for healthy aquatic organisms. All aquaculture sites showed significantly higher conductivity and ammonia-nitrogen at 20 m depth than the station without aquaculture. The aquaculture site that has been abandoned for nine months still showed higher 20 m chlorophyll-a and surface phosphate. Elevated surface, biochemical oxygen demand, phosphate and nitrate were observed at the largest and oldest aquaculture site. Based on the Chl-a concentration, the stations are classified as mesotrophic. This study showed that cage culture activities at Batang Ai Reservoir has impacted the water quality. Hence, further monitoring of water quality in the reservoir needs to be carried out. UR - https://www.ijee.net/article_64625.html L1 - https://www.ijee.net/article_64625_cc692ab5ef719d1c42ab7f8bdacda4f4.pdf ER -