Census location

Year

Season census done

Chi-square goodness of fit value

Conclusion

Wet season

Dry season

Amboseli

2010

18

17

Χ2 = 0.29, df = 1, p = 0.87

For 2010, wet season was similar to the dry season number.

2013

13

1

Χ2 = 10.29, df = 1, p < 0.001

For 2013, wet season number was higher than the dry season number.

Chi-square value

Χ2 = 0.81, df = 1, p = 0.37

Χ2 = 14.22, df = 1, p < 0.001

For the set of wet season, waterbuck number for 2010 was similar to that of 2013 (i.e. a non-significant decline in number over time in wet season). But for the set of dry season, waterbuck number in 2010 was higher than for 2013 (i.e. waterbuck number was decreasing with time).

Magadi

2010

2

6

Χ2 = 2.00, df = 1, p = 0.16

For 2010, wet season number was similar to the dry season number, with non-significant more in the dry season.

2013

17

16

Χ2 = 0.30, df = 1, p = 0.86

For 2013, wet season number was similar to dry season number.

Chi-square value

Χ2 = 11.84, df = 1, p < 0.001

Χ2 = 4.55, df = 1, p = 0.033

For the set of wet season, waterbuck numbers in 2010 was higher than for 2010 (i.e. waterbuck was increasing with time). Similarly, for the set of dry season, waterbuck number in 2013 was higher than for 2010 (i.e. waterbuck was also increasing in the dry season).

West Kilimanjaro

2010

2

0

No test necessary.

Waterbucks seen only in the wet season of 2010 and not dry season of 2010.

2013

0

0

No test necessary.

No waterbuck seen in West Kilimanjaro in 2013.

Chi-square value

No test necessary.

No test necessary.

Waterbuck seen only in the wet season of 2010 and not in other census periods.

Natron

2010

14

0

No test necessary.

For 2010, waterbuck was seen only in the wet season but not in the dry season.

2013

0

1

No test necessary.

For 2013, only one waterbuck was seen only in the dry season, but none in the wet season.

Chi-square value

No test necessary.

No test

Necessary.

For the set of wet season, waterbuck was only seen in 2010 and not 2013, implying a decline. But in the set of dry season, only one waterbuck was seen in 2013 and not 2010, implying a re-colonization.