Table 4.6    Dolphin encounter rates (sightings per 100 km of survey effort) during the impact monitoring period (February - May 2013) 

Survey Area

Dolphin Monitoring

Encounter rate (STG)
(no. of on-effort dolphin sightings per 100 km of survey effort)

Encounter rate (ANI)
(no. of dolphins from all on-effort sightings per 100 km of survey effort)

Primary Lines Only

Primary Lines Only

West Lantau

Set 1         (February 19,2013)

4.6

18.4

Set 2         (February 25,2013)

0.0

0.0

Set 3
(March 8, 2013)

19.4

62.9

Set 4
(March 22, 2013)

29.2

110.8

Set 5
(April 9, 2013)

11.2

61.5

Set 6
(April 17, 2013)

9.2

22.9

Set 7
(May 6, 2013)

9.8

34.3

Set 8
(May 14, 2013)

21.5

59.1