Table 1 in A comparison of image and observer based aerial surveys of narwhal

Table 1. Summary of survey effort in the four strata during aerial surveys conducted in Melville Bay from 25 to 30 August 2014.
Aerial observersImageAerial observers(truncated 500 m)Planned/Length ofAreacompletedsurveyedAnalyzedNo. ofNo.Ave. groupNo. ofNo.Ave. groupNo. ofNo.Ave. groupStratum(km2)transects (no.)transects (km)images asightingsof ind.bsize n (CV)sightingsof ind.size n (CV)sightingsof ind.size n (CV)NW6,3765 / 42262,066000 (0)000 (0)000 (0)NE2,07611 / 124686,57223492.1 (0.95)15392.6 (0.77)1332.52.5 (0.76)C2,6219 / 186638,19339862.2 (0.73)481883.9 (0.69)2393.54.1 (0.61)S3,74813 / 105754,105000 (0)000000All strata14,82138 / 441,93220,936621352.2 (0.77)632273.6 (0.72)361263.5 (0.69)
a Including 180 off-effort images that were not used in the analysis. b Ind. = individuals.