Table 3.
Seasonal estimates of bottlenose dolphin (Tursiops spp.; likely T. australis) number of schools with coefficient of variance (CV) and 95% confidence interval, and mean school size with CV. Estimates are given for each stratum/region, and for the study area overall.
| Stratum | Region | Number of schools | CV | 95% confidence interval | Mean school size | CV |
|---|---|---|---|---|---|---|
| Summer/Autumn survey | ||||||
| 1 | Central SA shelf waters | 20 | 1.02 | 3–114 | 2.00 | 0.00 |
| 2 | Spencer Gulf | 894 | 0.22 | 582–1,375 | 2.72 | 0.15 |
| 3 | Gulf St Vincent | 266 | 0.36 | 128–552 | 2.66 | 0.09 |
| 4 | Investigator Strait | 114 | 0.35 | 56–229 | 2.77 | 0.29 |
| Total | Study area overall | 1,294 | 0.19 | 885–1,892 | 2.70 | 0.11 |
| Winter/Spring survey | ||||||
| 1 | Central SA shelf waters | 0 | 0.00 | 0 | 0.00 | 0.00 |
| 2 | Spencer Gulf | 1,075 | 0.24 | 673–1,717 | 1.82 | 0.09 |
| 3 | Gulf St Vincent | 469 | 0.25 | 282–782 | 2.56 | 0.17 |
| 4 | Investigator Strait | 38 | 0.71 | 10–145 | 1.53 | 0.24 |
| Total | Study area overall | 1,582 | 0.19 | 1,088–2,302 | 2.03 | 0.08 |