Case study of marine pollution in Teluk Bahang, Penang, Malaysia

作者：Norlaila Binti Mohd Zanuri, MOHD-SHUKRI ABDULLAH, Nur Aqilah Muhamad Darif, Nithiyaa Nilamani, A T S Hwai · 发表于：IOP Conference Series Earth and Environmental Science · 年份：2020 · DOI：10.1088/1755-1315/414/1/012032 · 被引用次数：7 · 研究领域：Water Quality and Pollution Assessment、Water Quality Monitoring Technologies、Fish Biology and Ecology Studies

Abstract Teluk Bahang is a small fishing village located in the north-western of Penang Island, Malaysia. It has several attractions which include forest reserved park, ecotourism sites, theme parks and famous for its aquaculture activities. On 18th April 2019, fish farmers in Teluk Bahang experienced mass mortality of cultured fishes, namely groupers, barramundi, golden and red snappers due to a sudden change in water quality. Hence, this study was conducted to discuss marine pollution that occurred in Teluk Bahang that had caused the death of tonnes cultured fishes. Water samples were collected at the fish cage to investigate the water quality (physical and chemical parameters), heavy metals content, cell density and phytoplankton composition for determination of algal bloom that might be the cause of this crisis. Water samples were collected three times on 19th April 2019, 8th May 2019 and 26th May 2019. The results for physical and chemical parameters (pH, salinity, surface temperature, nitrate and phosphate) were all within the permissible limit according to Malaysia Marine Water Quality Class 2 (for aquaculture and recreation). Almost no harmful dinoflagellate species were detected in the water samples which indicated that phytoplankton did not cause a direct effect on the fish mortality. The concentration of heavy metals namely Cu, Cd, Ni, Fe, As and Hg in water samples were measured by atomic absorption spectroscopy (AAS). Results showed no detection of As and Hg conc...