Research Article
Cetacean Presence in the Trincomalee Bay and Adjacent Waters, Sri Lanka
Table 1
No. of sightings of individual species (no. of individuals are not included).
| Species | 2010 | 2011 | 2012 | Total | Jul. | Aug. | Sep. | Oct. | Nov. | Jan. | Feb. | Mar. | April. | May. | June. | July. | Aug. | Sep. | Oct. | Nov. | Dec. | Jan. |
| Balaenoptera musculus | 1 | 2 | 1 | 2 | 3 | 4 | 1 | 2 | 3 | 12 | 8 | 2 | 1 | 4 | — | 5 | 7 | 4 | 63 | Balaenoptera brydei | — | 1 | — | 1 | 1 | 1 | — | 1 | 2 | 4 | 3 | 1 | 3 | 1 | 1 | — | — | — | 23 | Physeter macrocephalus | 2 | 1 | 1 | 3 | 5 | 1 | 3 | 1 | 4 | 5 | 3 | — | 1 | — | — | 3 | 1 | 2 | 38 | Kogia sima | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | 1 | Indopacetus pacificus | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | — | — | 1 | Orcinus orca | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | — | 1 | Pseudorca crassidens | — | — | — | — | — | — | 1 | — | — | — | — | 1 | — | — | — | — | — | — | 2 | Steno bredanensis | — | — | — | — | — | — | — | 1 | — | — | — | — | — | — | — | — | — | — | 1 | Tursiops truncates | — | — | — | 1 | — | — | — | 1 | — | — | — | — | 1 | — | — | — | — | — | 4 | Stenella coeruleoalba | — | — | — | 1 | — | — | 1 | — | — | 1 | — | — | — | 1 | — | — | — | — | 4 | Stenella longirostris | 3 | 2 | 1 | 4 | 2 | 2 | 5 | 7 | 6 | 5 | 4 | 8 | 3 | 4 | 3 | 5 | 3 | 4 | 74 | Unidentified Baleen Whale | — | — | — | — | 1 | — | — | — | — | — | — | — | — | | — | — | — | 1 | 2 | Unidentified Beaked Whale | — | — | — | — | — | — | — | 1 | — | — | — | — | — | | — | — | — | — | 1 |
| Total sightings | 6 | 6 | 3 | 12 | 13 | 9 | 12 | 14 | 15 | 27 | 18 | 12 | 9 | 10 | 4 | 13 | 11 | 11 | 215 |
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