Table 2. Sex ratio of Oreochromis niloticus at different size class (n = 816) from Lake Hawassa

Size class	Male	Female	Total	Sex ratio	χ2
13.8–15.7	1	1	2	1:1	0.00
15.8–17.7	1	2	3	1:2	0.33
17.8–19.7	12	6	18	1:0.5	2.00
19.8–21.7	58	75	133	1:1.29	2.17
22.8–23.7	170	154	324	1:0.91	0.79
23.8–25.7	138	115	253	1:0.83	2.09
25.8–27.7	29	15	44	1:0.52	4.45*
27.8–30.7	17	6	23	1:0.35	5.26*
30.8–32.7	3	8	11	1:2.67	2.27
≥ 32.8	1	4	5	1:4.00	1.80
Total	430	386	816	1:0.93	2.37

Values are indicates the compressions show a significant difference (p < 0.05).