Table 2.

Species association indices (Dice 1945) based on the species occurrence in the eight most productive breeding sites

	An. maculipennis s.s.	An. messeae	An. daciae	An. atroparvus
An. maculipennis s.s.		0.57	0.67	0.75
An. messeae	0.80		0.83	0.75
An. daciae	0.80	0.71		0.50
An. atroparvus	0.60	0.43	0.33
Breeding sites positive	5	7	6	4
Breeding site index	0.63	0.88	0.75	0.50
Avg. no. of Anopheles species per site	2.20	1.71	1.83	2.00

Two reciprocal values above and below the diagonal are obtained. Below, the number of positive breeding sites for the respective species, the breeding site index and the average number of Anopheles species in the respective breeding sites are quantified