Abundance, Distribution, and Diversity of Freshwater Snail and Prevalences of Their Infection by Cercaria of Fasciola gigantica and Schistosoma spp at Mayo-Vreck River, Far North Region of Cameroon

Table 1

Diversity and abundance of molluscs in Mayo-Vreck.

Class	Pulmonata						Littorinimorpha		Total
Family	Lymnaeidae	Planorbidae				Thiaridae	Viviparidae	Bithyniidae
Subfamily		Bulininae			Planorbinae
Species	L. natalensis	B. globosus	B. truncatus	B. tropicus	B. pfeifferi	M. tuberculata	B. unicolor	Bithynia sp.
May	272	61	39	46	295	299	409	353	1774
June	192	61	37	41	293	217	312	227	1380
July	121	79	52	51	345	223	353	282	1506
November	24	46	18	26	177	155	163	106	715
December	96	40	28	29	260	236	231	145	1065
January	121	57	33	37	290	231	283	170	1222
February	167	57	44	36	368	262	319	239	1492
March	214	90	55	54	415	366	469	333	1996
April	176	69	60	69	544	454	557	388	2317
Total (n)	1383	560	366	389	2987	2443	3096	2243	13467
Means	153.67	62.22	40.67	43.22	331.89	271.44	344	249.22
Standard deviation	72.51	15.47	13.55	13.43	104.38	90.05	120.52	97.71
Abundance (A)	0.10	0.04	0.03	0.03	0.22	0.18	0.23	0.17