Table 2. Species richness and summary of cetacean sightings distribution considering species, group categories, seasons, areas and depth.
| South Area | Southeast Area | Total Study Area | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Species group categories | Scientific names | Spring (S = 15) | Autumn (S = 9) | Total (S = 16) | Spring (S = 14) | Autumn (S = 14) | Total (S = 17) | Total (S = 21) | Depth (m) | ||||
| N | NIMean (se) | N | NIMean (se) | NIMean (se) | N | NIMean (se) | N | NIMean (se) | NIMean (se) | NIMean (se) | Depth Mean (se) | ||
| Small delphinids | Delphinus delphis | 22 | 136.68 (65.22) | 5 | 214.8 (139.86) | 151.15 (58.24) | 0 | 0 | 0 | 0 | 0 | 151.15 (58.24) | 243.2 (14.2) |
| Feresa attenuata | 0 | 0 | 0 | 0 | 0 | 1 | 10 | 0 | 0 | 0 | 10 | 834 | |
| Stenella attenuata | 0 | 0 | 0 | 0 | 0 | 6 | 117.5 (48.88) | 1 | 25 | 104.29 (43.38) | 104.29 (43.38) | 755.7 (19.2) | |
| Stenella clymene | 2 | 178 (172) | 0 | 0 | 178 (172) | 1 | 10 | 0 | 0 | 10 | 122 (114.1) | 1171 (14.8) | |
| Stenella coeruleoalba | 2 | 110 (10) | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 110 (10) | 1299 (13.6) | |
| Stenella frontalis | 15 | 205.07 (69.02) | 10 | 25.1 (6.88) | 133 (44.7) | 10 | 189.1 (66.19) | 5 | 66.4 (42.56) | 148.2 (47.85) | 138.75 (32.83) | 397.5 (16.1) | |
| Stenella longirostris | 2 | 495 (405) | 0 | 0 | 495 (405) | 11 | 258.18 (52.98) | 2 | 450 (350) | 287.69 (62.84) | 315.33 (69.64) | 692.5 (17.6) | |
| Steno bredanensis | 1 | 20 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 20 | 145 | |
| Unidentified Dolphin | 7 | 4.85 (1.4) | 2 | 8.5 (1.5) | 5.67 (1.22) | 4 | 1.75 (0.25) | 4 | 2.5 (0.65) | 2.13 (0.35) | 4 (0.79) | * | |
| Large delphinids | Globicephala melas | 10 | 121.5 (56.81) | 5 | 80 (30.49) | 107.46 (38.71) | 1 | 35 | 1 | 15 | 25 (10) | 97.76 (34.67) | 637.9 (18.4) |
| Globicephala spp | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 0 | 3 | 1223 | |
| Grampus griseus | 3 | 30.67 (13.37) | 3 | 23.33 (10.14) | 27 (7.68) | 1 | 13 | 2 | 265 (35) | 181 (86.39) | 78.33 (108.39) | 1095.8 (16.3) | |
| Orcinus orca | 3 | 9 (3.79) | 0 | 0 | 9 (3.79) | 0 | 0 | 2 | 6.5 (1.5) | 6.5 (1.5) | 8 (4.95) | 550.9 (22.1) | |
| Pseudorca crassidens | 0 | 0 | 0 | 0 | 0 | 1 | 40 | 1 | 30 | 35 (5) | 35 (5) | 705.7 (25.5) | |
| Tursiops truncatus | 6 | 47.33 (31.29) | 9 | 64.89 (18.43) | 57.87 (16.17) | 12 | 19.75 (5.68) | 6 | 17 (6.81) | 18.83 (4.31) | 36.58 (8.32) | 575.3 (19.3) | |
| Small whales | Balaenoptera acutorostrata | 3 | 1.33 (0.33) | 1 | 1 | 1.25 (0.25) | 1 | 3 | 2 | 2 (1) | 2.33 (0.67) | 1.72 (0.36) | 553.7 (19.9) |
| Balaenoptera bonaerensis | 1 | 2 | 1 | 2 | 2 | 0 | 0 | 1 | 8 | 8 | 4 (2) | 410.7 (17.2) | |
| Balaenoptera spp (like minke whale) | 4 | 1.5 (0.5) | 1 | 1 | 1.4 (0.4) | 8 | 1.37 (0.18) | 2 | 1 | 1.3 (0.15) | 1.3 (0.16) | 635.9 (19.6) | |
| Unidentified small whale | 2 | 1 | 1 | 1 | 1 | 2 | 1 | 0 | 0 | 0 | 1 | * | |
| Large whales | Balaenoptera borealis | 1 | 1 | 0 | 0 | 1 | 0 | 0 | 0 | 0 | 0 | 1 | 471 |
| Balaenoptera brydei | 1 | 1 | 0 | 0 | 1 | 9 | 1.56 (0.18) | 4 | 1.25 (0.25) | 1.46 (0.14) | 1.42 (0.14) | 755.2 (18.6) | |
| Balaenoptera physalus | 0 | 0 | 1 | 1 | 1 | 0 | 0 | 2 | 6 | 6 | 4.33 (1.67) | 585.8 (11.7) | |
| Megaptera novaeangliae | 0 | 0 | 0 | 0 | 0 | 11 | 2.36 (0.43) | 3 | 1 (0) | 2.07 (1.38) | 2.07 (1.38) | 560.2 (21.6) | |
| Balaenoptera spp. | 1 | 2 | 4 | 1.5 (0.29) | 1.6 (0.24) | 2 | 1 | 4 | 1.25 (0.25) | 1.16 (0.17) | 1.36 (0.15) | * | |
| Unidentified large cetacean | 41 | 1.46 (0.16) | 6 | 1.17 (0.17) | 1.42 (0.14) | 32 | 1.06 (0.04) | 14 | 1.07 (0.07) | 1.07 (0.04) | 1.25 (0.08) | * | |
| Unidentified large whale | 5 | 1.2 (0.2) | 3 | 1.3 (0.33) | 1.25 (0.16) | 3 | 1 (0) | 6 | 1.16 (0.17) | 1.1 (0.11) | 1.18 (0.09) | * | |
| Sperm Whale | Physeter macrocephalus | 86 | 3.35 (0.37) | 27 | 7.56 (3.99) | 4.35 (0.99) | 19 | 2.26 (0.37) | 8 | 15.75 (12.07) | 6.26 (3.62) | 4.72 (1.06) | 1223.6 (19.8) |
| Unidentified Ziphiidae Whale | ziphiid whale | 0 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 1 | 1 | 601 |
S, species richness is the number of species identified. Total spring richness was 20 and total autumn richness 15.
N, number of sightings; NI Mean, mean number of individuals; se, standard error.
* depths of unidentified species were not considered.