Branchial Chamber and Gastrointestinal Tracts Parasites of Fish Species in Benue and Niger Rivers, North Central, Nigeria

Table 1

Prevalence of parasites of fish species in rivers Niger and Benue at Lokoja.

Fish species	Number examined	Number positive (%)	Number negative (%)	Chi-square	df	value
Clarias sp.	120	96 (80.0)	24 (20.0)	85.560	4	<0.001
Tilapia zillii	85	81 (95.3)	4 (4.7)
Oreochromis niloticus	97	87 (89.7)	10 (10.3)
Synodontis schall	68	48 (70.6)	20 (29.4)
Megalops atlanticus	70	27 (38.6)	43 (61.4)
Total	440	339 (77.0)	101 (23.0)

Significant at .