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Abstract

The effects of short term exposure to cyperdicot on behavioural and haematological responses in 300 Clarias gariepinu swere investigated. The fish were randomly divided into three groups of 30 fish. Fish in first treatment group were exposed to tap water and served as control, while those in second and third groups were treated with 0.04 and 0.08 mg l-1 of Cyperdicot, respectively. The 24, 48, 72 and 96 h LC 50 values were1.462, 1.094, 1.030 and 0.800 mg l-1 , respectively. The safe level for the insecticide varied from 8 x 10 -3 to 8 x 10 -4 mg l-1 . Fish exposed to sub-lethal concentrations of insecticide exhibited alterations in various blood parameters including significant reductions in RBC count, Hb and PCV. A cyperdicot-induced dose-and time-dependent significant increase in W B C count from day 10 onward was observed, while values of blood indices such as MCV, MCH and MCHC in treated fish were not significantly different from those of the control group (P>0.05). This study revealed that the short term exposure to cyperdicot on behavioural and haematological responses in Clarias gariepinus elicited reduction of RBC, Hb and PCV values while MCV and MCH caused both macrocytic and microcytic anemia in the fish.

The hematological profile of Barbonymus altus to evaluate water quality in the Badher Bank Conservation Area, Blitar, East Java, Indonesia

“…Unlike erythrocytes, several stress factors can cause changes in the number of white blood cells, and all types of leukocytes play an essential role in the immune system (Tulgar and Celik 2015). Changes in the number of leukocytes are an excellent indicator of environmental stressors due to the immune response to toxins (Odo et al 2017). Based on the data listed in figure 3, there was an increase in white blood cells at each station, in which fish at Station 1 showed a lower increase than those in Station 2.…”