Browsing by Author "Danwali, M.I."

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    GROWTH RESPONSE AND NUTRIENT UTILIZATION OF Heterobranchus bidorsalis JUVENILES FED GRADED LEVELS OF MELON SHELL MEAL
    (Departments of Aquaculture and Fisheries Management, Nasarawa State University, Keffi, 2017-01) Lawee, A.Y.; Danwali, M.I.; Kigbu, A.A.; Samuel, Emmanuel Alu
    The study evaluated the effect of including graded levels of melon shell in diets of Heterobranchus bidorsalis juveniles (13.30±1.20). This study was conducted for 8 weeks. The diet constitute 42% crude protein content with melon shell at different inclusion levels of 0%, 25%, 50%, 75% and 100% respectively. Fish in each tank was fed 3% body weight of diet twice daily. Weights of fish were taken weekly. Data collected were analyzed using One way Analysis of Variance (ANOVA). The result showed that the ash content ranged from 2.80 in fish fed diet one to 4.03 in fish fed diet four. Crude fibre content ranged from 8.52 of fish fed diet one to 12.99 in fish fed diet five. Also, Ether extract ranged from 7.90 in fish fed diet one to 17.45 in fish fed diet five while the crude protein content values ranged from 39.66 in fish fed diet one to 40.05 in fish fed in diet five. The proximate values of the experimental diets showed a significant differences (P<0.05) among treatments.
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    SHORT-TERM EFFECTS OF BASAGRAN HERBICIDE ON BEHAVIOR AND SOME HAEMATOLOGICAL CHARACTERISTICS OF C. gariepinus.
    (Department of Aquaculture and Fisheries Management, Nasarawa State University, Keffi, 2017-01-11) Lawee, A.Y.; Kigbu, A.A.; Danwali, M.I.
    The influences of basagran, a widely used herbicide on the behavioural actions,( Opercular and tail fin beats) per minutes and the haematological characteristics of blood on juveniles of C. gariepinus were investigated under laboratory conditions. The orders of behavior of the fish were restlessness, loss of balance, air gulping and period of quiescence and finally death. Also, blood and mucus around the gills of the fish certified death were observed. However, the intensity of their actions and mucus accumulation were more pronounced in tanks containing the higher levels of the toxicant. The opercula ventilation and tail fin beats ware significantly (P<0.05) higher than in the control fish at the exposure period of 12, 24 and 48hrs. By 72- 96-hrs both the opercula and tail fin beats of the exposed fish showed marked reduction compared to the control tanks. The results of the opercula and tail fin beats were seen to be dose-dependent. Haematological results showed a significant (P<0.05) reduction in the values of haematocrit and total erythrocytes count with increase in concentration and time of exposure where as the values of total leucocytes count increase with increase in concentration.