Some biological and hematological responses of Oreochromis niloticus juveniles exposed to Atrazine herbicide
Journal Title: Aquaculture, Aquarium, Conservation & Legislation - International Journal of the Bioflux Society - Year 2012, Vol 5, Issue 5
Abstract
This research was aimed at finding the influence of Atrazine on a most widely farmed fish, Oreochromis niloticus (Linnaeus, 1758), in Nigeria. Specific areas of investigation were to find the LC50 after 24, 48, 72 and 96 hours of the chemical administration to the fish. The effects of the chemical on the behavioral and biological responses of O. niloticus were equally observed. The ten fish each were stocked in six different tanks containing 40 litres of water. These tanks contained graded concentrations of the chemical and the treatments were replicated three times. Dissolved oxygen content was reducing with increasing Atrazine concentration, while temperature and pH increased with increasing Atrazine concentration. The LC50 of Atrazine in 24, 48, 72 and 96 hours were 7.9, 7.6, 7.3 and 7.2 respectively. Behavioral and biological responses included loss of reflex, air gulping, erratic swimming, discoloration, hemorrhage and molting. The blood parameters observed showed that there were increases in packed cell volume (PCV) and red blood cell count (RBC) and decrease in hemoglobin (Hb), erythrocyte sedimentation rate (ESR) and mean cell hemoglobin (MCH), while there was no significant change in white blood cell count (WBC) and mean cell volume (MCV) values. The chemical was therefore observed to be lethal to juvenile O. niloticus.
Authors and Affiliations
Fidelis Ada, Ezekiel Ayotunde, Bayim Bayim
Keywords
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