Publication Date:
2021-07-15
Description:
This study investigates the morphometric and meristic features of Chrysichthys nigrodigitatus in relations to heavy metal concentrations. Varying sizes of Clarias nigrodigitatus were obtained with the help of fisher-folks, from Arakanga reservoir Ogun state, Nigeria. Water samples were also collected alongside with fish samples per week and five of the samples were sent to laboratory for analysis to determine the presence of four heavy metals in both fish and water. Lead, Cadmium, Nickel and Arsenic were investigated by atomic absorption spectrophotometer (AAS). Four tissues; gills, kidney, liver and muscle were compared with the level of metals in the water. Lower concentrations of metals were recorded in water except for Cadmium which is higher, than in fish. Lower concentration of heavy metals found in fish and water was less than that recommended by the World Health Organisation (WHO's) guideline for maximum concentration recorded in the tissue of the samples. Lead was found to be dominant in the gills of C. nigrodigitatus, while Cadmium was found to be highest in the water sample from Arakanga reservoir. There is significant difference (P〈0.05) in Nickel and Arsenic concentration in the tissues of C. nigrodigitatus and water. It was concluded that though the heavy metals of interest were present in measurable quantities, they were still within safe limits for consumption.
Description:
Includes: 11 references.
Keywords:
Pollution
;
Fisheries
;
Chrysichthys nigrodigitatus
;
Nigeria
;
Ogun State
;
Arankanga reservoir
;
freshwater environment
;
Heavy metals
;
Freshwater fish
;
Reservoir fisheries
;
Artisanal fishing
;
Lead
;
Toxicants
;
Pollution effects
;
Quality assurance
;
Morphometry
;
Meristic counts
;
Water analysis
;
Freshwater pollution
;
Nickel
;
Arsenic
;
Cadmium
;
Fish consumption
;
Health and safety
Repository Name:
AquaDocs
Type:
conference_item
,
TRUE
Format:
application/pdf
Format:
application/pdf
Format:
265-268
