Table 1. Summary of the monthly survey from April 2012 to November 2013.

Month		Total number of quadrats	Number of individuals in a quadrat
			0	1	2	3	4
2012	4	15	7	4	3	1	0
	5	15	6	5	2	2	0
	6	15	9	5	1	0	0
	7	15	10	3	1	1	0
	8	15	10	3	2	0	0
	9	15	8	4	3	0	0
	10	45	30	6	6	2	1
	11	30	18	7	4	1	0
	12	30	16	9	3	0	2
2013	1	15	10	4	0	1	0
	2	30	22	5	2	0	1
	3	45	30	7	6	2	0
	4	45	24	13	6	2	0
	5	15	7	4	4	0	0
	6	15	10	3	2	0	0
	7	45	30	9	1	5	0
	8	15	10	2	3	0	0
	9	15	11	0	3	1	0
	10	30	15	7	5	2	1
	11	30	18	4	4	3	1