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- W2961356838 abstract "In aquatic environment, heavy metals are produced from natural and anthropogenic sources and the degree of contamination in fish is dependent on the sampling site, pollution types as well as mode of feeding. The concentration of heavy metals such as nickel (Ni), zinc (Zn), iron (Fe) and cadmium (Cd) were analyzed in various parts (head, gills intestine, gill and tail) of the silver catfish, Chrysichthys nigrodigitatus which were collected from Badagry creek and different ponds namely Morogbo (MOP), Magbon (MAP), Churchgate (CGP) and Ajibade (AJP) ponds within Badagry axis. The concentration of the heavy metals was determined using atomic absorption spectrophotometer (AAS). The results showed the accumulation of the metal differently in various part of the fish. Heavy metals concentration in the fish sample was in this order: Zn > Fe > Ni > Cd. Zinc was abundant and had the highest level of mean concentration accumulated in the head and all parts of the fish samples from both the lagoon and the fish ponds with the highest value of 3.06 µg/g recorded in the intestine of the fish sample from Church Gate concrete pond. The high zinc value could be associated with the fact that this metal is naturally abundant in Nigerian soils and fish accumulate zinc from both the surrounding water, sediments and their diet but the concentrations are below recommended value of Food and Agriculture Organization (FAO) and Lagos State Environmental Protection Agency (LASEPA) for daily intake. Iron was the second most concentrated metal with a mean concentration ranging from 0.33 - 2.37 µg/g, and this may be attributed to the clay nature of Nigerian soils. Nickel concentration in the samples ranged from 0.14-2.98 µg/g which may due to the discharge of industrial effluents, domestic and agricultural activities around Badagry axis. Cadmium was not detected in samples from Morogbo fish ponds, but was detected in samples from the lagoon and the other three fish ponds, with values ranging from ND – 0.25 µg/g, and this was relatively below the recommended value of FAO and LASEPA in fish which is an indication that the C. nigrodigitatus from these sampling sites was safe for human consumption." @default.
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- W2961356838 date "2019-01-01" @default.
- W2961356838 modified "2023-09-26" @default.
- W2961356838 title "Bioaccumulation of Heavy Metals in Parts of the Silver Catfish ( Chrysichthys nigrodigitatus ) Harvested from Badagry Creek and Fish Ponds in Badagry, Lagos, Nigeria" @default.
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