Table 2. Monthly and overall sex ratio of Synodontis schall from River Siluko
Month | No. of fish sexed | No. of males | No. of females | Sex ratio (M:F) | Chi-square (χ2) |
March 2015 | 5 | 0 | 5 | 0:5 | 1.667 |
April | 15 | 11 | 4 | 1:0.36* | 3.267 |
May | 1 | 0 | 1 | 0:1 | 0.091 |
June | 0 | 0 | 0 | 0:0 | 0 |
July | 41 | 21 | 20 | 1:0.95 | 0.024 |
August | 68 | 22 | 46 | 1:2.09* | 8.471 |
September | 0 | 0 | 0 | 0:0 | 0 |
October | 0 | 0 | 0 | 0:0 | 0 |
November | 0 | 0 | 0 | 0:0 | 0 |
December 2015 | 0 | 0 | 0 | 0:0 | 0 |
January 2016 | 0 | 0 | 0 | 0:0 | 0 |
February | 0 | 0 | 0 | 0:0 | 0 |
March | 0 | 0 | 0 | 0:0 | 0 |
April 2016 | 0 | 0 | 0 | 0:0 | 0 |
Total | 130 | 54 | 76 | 1:1.41 | 3.723 |
χ2 = 3.723.
p < 0.01.