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

Table 5

Prevalence of parasites according to body parts of the fish species.

Fish species	Body parts	Number examined	Number positive	Chi-square	df	value
Clarias sp.	Gills	120	14 (11.7)	80.278	1	<0.001
	Intestines	120	82 (68.3)
		120	96 (80.0)
Tilapia zillii	Gills	85	14 (16.5)	66.241	1	<0.001
	Intestines	85	67 (78.8)
		85	81 (95.3)
Oreochromis niloticus	Gills	97	12 (12.4)	82.714	1	<0.001
	Intestines	97	75 (77.3)
		97	87 (89.7)
Synodontis schall	Gills	68	8 (11.8)	32.970	1	<0.001
	Intestines	68	40 (58.8)
		68	48 (70.6)
Megalops atlanticus	Gills	70	4 (5.7)	16.565	1	<0.001
	Intestines	70	23 (32.9)
		70	27 (38.6)
Overall	Gills	440	52 (11.8)	264.985	1	<0.001
	Intestines	440	287 (65.2)
		440	339 (77.0)

Significant at . ns, not significant at .