Reproductive Strategy of Chrysichthys nigrodigitatus (Lacepede, 1803) in a Natural Environment in the Nkam River, Littoral Cameroon

Table 2

Monthly variation of sex ratio in C. nigrodigitatus between October 2015 and August 2016 in the Nkam River.

Month	Number	Sex ratio
	Male (N)	Female (N)	M : F
October	1	2	1 : 2
November	3	12	1 : 4
December	3	3	1 : 1
January	4	9	1 : 2.3
February	6	8	1 : 1.3
March	2	4	1 : 2
April	9	12	1 : 1.3
May	12	14	1 : 1.2
June	8	6	1 : 0.8
July	8	13	1 : 1.6
August	6	9	1 : 1.5
Total	62	92	1 : 1.5

N = number, M: F = male: female, significantly () different from the theoretical sex ratio 1 = : 1.