Table 2.

Seasonal estimates of bottlenose dolphin (Tursiops spp.; likely T. australis) abundance with coefficient of variance (CV) and 95% confidence interval (CI), and bottlenose dolphin density (animals/km²) with 95% CI. Estimates are given for each stratum/region, and for the study area overall.

Stratum	Region	Animal abundance	CV	95% confidence interval	Density (animals/km2)	95% confidence interval
Summer/Autumn survey
1	Central SA shelf waters	39	1.02	7–228	0.004	0.001–0.03
2	Spencer Gulf	2,431	0.23	1,530–3,862	0.12	0.07–0.18
3	Gulf St Vincent	708	0.40	318–1576	0.14	0.06–0.31
4	Investigator Strait	315	0.47	125–790	0.04	0.02–0.11
Total	Study area overall	3,493	0.21	2,327–5,244	0.08	0.06–0.12
Winter/Spring survey
1	Central SA shelf waters	0	0.00	0	0.00	0.000
2	Spencer Gulf	1,952	0.26	1,169–3,260	0.09	0.06–016
3	Gulf St Vincent	1,202	0.30	657–2,201	0.24	0.13–0.43
4	Investigator Strait	59	0.77	14–241	0.01	0.002–0.03
Total	Study area overall	3,213	0.20	2,151–4,801	0.08	0.05–0.11