A Comparative Evaluation of Carcass Quality, Nutritional Value, and Consumer Preference of Oreochromis niloticus from Two Impoundments with Different Pollution Levels in Zimbabwe
Table 1
Least square means for water physicochemical parameters for Lake Chivero and Lake Kariba in June and October.
Parameter
Units
Lake Chivero
Lake Kariba
s.e.
June
October
June
October
pH
7.67
8.28
8.02
8.44
0.230
Conductivity
µS/cm
513.0
683.6
93.3
71.2
42.540
Oxygen percent
%
30.6
112.0
99.1
90.5
5.992
Dissolved oxygen
mg/l
2.5
7.9
7.9
6.7
0.381
Temperature
°C
16.4
25.3
24.2
27.5
0.467
Transparency
m
0.8
0.6
2.4
1.9
0.230
Ammonia
mg/l
998.3
216.7
50.4
29.7
156.761
Total phosphorus
mg/l
804.5
833.4
32.2
24.2
77.60
Nitrates
mg/l
248.24
111.94
37.72
32.22
53.636
Total nitrogen
mg/l
1246.64
1548.62
85.32
2023.84
816.739
Reactive phosphorus
mg/l
739.2
543.5
13.8
11.6
40.167
Chlorophyll A
µg/l
3.7
12.9
1.1
2.2
1.420
Least squares means with similar superscripts within rows are nonsignificantly different (P>0.05).
