European Journal of Scientific Research - EuroJournals

792 F.R. Falayi, A.S. Ogunlowo and M.O. Alatise
stocking. It is obvious from fig 1 that the fish in pond 1 fed with droppings from only one bird
compared favourably with pond 4 which was the control. This was followed by the fish in pond 2 fed
from droppings of two birds and lastly the fish in pond 3 fed with droppings of three birds.
A regression analysis was carried out to predict the weight of fish in the various ponds when
compared with the control pond. The regression of pond 1 on pond 4 is as shown in fig.3 which
showed a high correlation (R 2 =0.9985) and polynomial of the third degree best described the
relationship ie y = 3E-07x 3 - 0.001x 2 + 1.2585x - 20.261. A regression of pond 2 on pond4 (Fig. 4)
showed an equation y = 2E-07x 3 - 0.0007x 2 + 0.8721x - 7.1101 with a correlation of 0.99(R 2 =. 0.99)
while the regression of pond 3 on pond 4 was fitted with the polynomial equation y = 1E-07x 3 -
0.0005x 2 + 0.6725x + 1.8387 with high correlation (R 2 = 0.9988) as shown in Fig 5. Mortality rate of
20% was recorded in pond3 during the experiment. However, no mortality rate was recorded for pond
2 and pond 1. The experiment did not allow for sorting of the fish as development progressed hence
slight cannibalism of less than 5% was recorded in all the ponds
Figure 1: Average Weight of Fish Against Weeks after Stocking
Figure 2: Comparison of the Growth Fish Rate/week in the Various Ponds