Population Structure of the Freshwater Crab Potamon algeriense (Bott, 1967) Inhabiting Oued Zegzel, (Northeast of Morocco)

Table 2

Sex ratio by month of Potamon algeriense from Oued Zegzel, Morocco, over one year period ().

Month	Males		Females		Total	Sex ratio		Significance
	N	%	N	%
Oct	38	54.29	32	45.71	70	1.19 : 1		NS
Nov	35	55.56	28	44.44	63	1.25 : 1		NS
Dec	42	59.15	29	40.85	71	1.45 : 1		NS
Jan	40	44.44	50	55.56	90	0.80 : 1		NS
Feb	5	41.67	7	58.33	12	0.71 : 1		NS
Mar	2	25.00	6	75.00	8	0.33 : 1		NS
Apr	25	58.14	18	41.86	43	1.39 : 1		NS
May	11	61.11	7	38.89	18	1.57 : 1		NS
Jun	48	62.34	29	37.66	77	1.66 : 1		S
Jul	38	59.38	26	40.63	64	1.46 : 1		NS
Aug	46	56.79	35	43.21	81	1.31 : 1		NS
Sep	48	66.67	24	33.33	72	2.00 : 1		S
Total	378	56.50	291	43.50	669	1.30 : 1		S

S: significative; NS: nonsignificative.