Table 3.
Statistical analysis of the epidemiological data of studied cetaceans during the period 2000–2018 (n = 586).
| Overall N = 586 | Other cause of death N = 421 | Fishing interactions N = 32 | P-value | |
|---|---|---|---|---|
| Species | 0.125 | |||
| Balaenoptera acutorostrata | 6 (1.3) | 4 (1.0) | 2 (6.2) | |
| Balaenoptera borealis | 2 (0.4) | 2 (0.5) | 0 (0.0) | |
| Balaenoptera edeni | 2 (0.4) | 2 (0.5) | 0 (0.0) | |
| Balaenoptera physalus | 4 (0.9) | 4 (1.0) | 0 (0.0) | |
| Delphinus delphis | 51 (11.3) | 47 (11.2) | 4 (12.5) | |
| Globicephala macrorhynchus | 36 (7.9) | 34 (8.1) | 2 (6.2) | |
| Grampus griseus | 11 (2.4) | 11 (2.6) | 0 (0.0) | |
| Kogia breviceps | 23 (5.1) | 23 (5.5) | 0 (0.0) | |
| Kogia sima | 6 (1.3) | 6 (1.4) | 0 (0.0) | |
| Lagenodelphis hosei | 3 (0.7) | 3 (0.7) | 0 (0.0) | |
| Megaptera novaeangliae | 2 (0.4) | 2 (0.5) | 0 (0.0) | |
| Mesoplodon bidens | 1 (0.2) | 1 (0.2) | 0 (0.0) | |
| Mesoplodon densirostris | 7 (1.5) | 7 (1.7) | 0 (0.0) | |
| Mesoplodon europaeus | 6 (1.3) | 5 (1.2) | 1 (3.1) | |
| Orcinus orca | 1 (0.2) | 1 (0.2) | 0 (0.0) | |
| Phocoena phocoena | 1 (0.2) | 1 (0.2) | 0 (0.0) | |
| Physeter macrocephalus | 22 (4.9) | 22 (5.2) | 0 (0.0) | |
| Pseudorca crassidens | 2 (0.4) | 2 (0.5) | 0 (0.0) | |
| Stenella coeruleoalba | 92 (20.3) | 86 (20.4) | 6 (18.8) | |
| Stenella frontalis | 89 (19.6) | 74 (17.6) | 15 (46.9) | |
| Stenella longirostris | 3 (0.7) | 3 (0.7) | 0 (0.0) | |
| Steno bredanensis | 23 (5.1) | 23 (5.5) | 0 (0.0) | |
| Tursiops truncatus | 36 (7.9) | 34 (8.1) | 2 (6.2) | |
| Ziphius cavirostris | 24 (5.3) | 24 (5.7) | 0 (0.0) | |
| Sex | 0.813 | |||
| Female | 205 (45.8) | 191 (45.9) | 14 (43.8) | |
| Male | 243 (54.2) | 225 (54.1) | 18 (56.2) | |
| Growth development categories | 0.871 | |||
| Neonate/calf | 131 (28.9) | 123 (29.2) | 8 (25.0) | |
| Juvenile/subadult | 130 (28.7) | 120 (28.5) | 10 (31.2) | |
| Adult | 192 (42.4) | 178 (42.3) | 14 (43.8) | |
| Coast | 0.684 | |||
| El Hierro y La Palma | 8 (1.8) | 7 (1.7) | 1 (3.1) | |
| La Gomera y Tenerife | 154 (34.0) | 141 (33.5) | 13 (40.6) | |
| Gran Canaria | 125 (27.6) | 116 (27.6) | 9 (28.1) | |
| Fuerteventura y Lanzarote | 166 (36.6) | 157 (37.3) | 9 (28.1) | |
| Mature categories | 0.704 | |||
| Immature | 225 (50.1) | 210 (50.4) | 15 (46.9) | |
| Mature | 224 (49.9) | 207 (49.6) | 17 (53.1) | |
| Body condition | 0.004 | |||
| Poor/very poor | 162 (37.8) | 158 (39.6) | 4 (13.3) | |
| Good/fair | 267 (62.2) | 241 (60.4) | 26 (86.7) | |
| Diving behavior | 0.008 | |||
| Shallow diver | 317 (70.0) | 288 (68.4) | 29 (90.6) | |
| Deep diver | 136 (30.0) | 133 (31.6) | 3 (9.4) |
The pathological cause of death in 453 cases was determined, among which, 32 cases were due to fishery interactions.