Alien Fish Species in the Mbô Floodplain Rivers in Cameroon

Table 1

Sampled fish, total length, total weight, and sex ratio of alien fish species caught in the Mbô Floodplain Rivers (October 2014–October 2015).

Family/Species and status	Relative percentage		Total length (cm)			Weight (g)			Sex-ratio
	N	%	Min	Max	Mean± sd	Min	Max	Mean± sd	M	F	M:F	χ^2
Clariidae: Clarias gariepinus (Burchell, 1822) (Escaped from ponds in Dschang since 1990, accidental introduction, naturalised)	78	32.91	12.50	88.50	31.19±15.62	5.71	5250.00	353.42±656.20	35	43	0.81:1	0.1567
Channidae: Parachanna obscura (Günter, 1861) (Escaped from ponds in Santchou near the Black water river since 2002, accidental introduction, unknown)	33	13.92	22.00	46.50	27.46±5.34	77.84	784.57	189.52±157.35	23	21	1.09:1	0.3526ns
Cichlidae: Tilapia cameronensis (Holly, 1927) (Translocated from Lom River-Cameroon, intentional transfer, naturalised)	60	25.31	13.00	26.50	19.17±3.34	30.00	350.00	122.62±71.88	32	28	1.14:1	0.0921ns
Oreochromis niloticus (Linnaeus, 1758). Exotic, from Bangui Central African Republic since 1975, accidental diffusion, naturalised)	66	27.85	12.00	26.00	19.49±3.67	30.00	350.00	132.41±777.50	34	32	1.06:1	0.0950ns

N: number of fish; %: relative percentage; Min: minimum; Max: maximum; M: male; F: female; M: F: sex ratio; χ²: chi-square test; ns: P > 0.05, P < 0.05.