Table 1.

Summary of aerial surveys carried out in central South Australia (SA) by season for each stratum and overall: size of areas (km²), survey effort (km), number of bottlenose dolphins (Tursiops spp.; likely T. australis) school sightings made by each observer platform (after truncation) and number of unique school sightings (after truncation).

Stratum	Area (km2)	Effort (km)	Start and end date (day/month/year)	Number of transects	Number of sightings observer 1	Number of sightings observer 2	Number of unique sightings
Summer/Autumn survey
1	9,042.2	1,085.7	17/04–06/06/2011	21	0	1	1
2	21,026.8	2,593.7	05/04–30/05/2011	30	57	39	59
3	5,103.6	636.3	27/03–29/03/2011	15	8	8	13
4	7,265.2	882.2	29/03–06/04/2011	18	6	6	7
Total	42,437.8	5,198.0	27/03–06/06/2011	84	71	52	80
Winter/Spring survey
1	9,042.2	1,100.3	30/08–16/09/2011	21	0	0	0
2	21,026.8	2,613.7	16/09–05/10/2011	32	71	45	77
3	5,103.6	693.2	13/08–18/09/2011	16	33	25	36
4	7,265.2	828.6	09/08–13/08/2011	17	2	2	2
Total	42,437.8	5,235.8	09/08–05/10/2011	86	110	73	115