Richard, Pierre R; Laake, J; Hobbs, R C; Heide-Jørgensen, Mads Peter; Asselin, Natalie C; Cleator, H (2010): (Table 3) Narwhal (Monodon monoceros) sightings, group sizes and surface estimates in the Canadian High Arctic 2002-2004 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.819057, In supplement to: Richard, PR et al. (2010): Baffin Bay Narwhal Population Distribution and Numbers: Aerial Surveys in the Canadian High Arctic, 2002–04. Arctic, 63(1), 85-99, https://doi.org/10.14430/arctic649
Always quote citation above when using data! You can download the citation in several formats below.
Coverage:
Median Latitude: 72.551429 * Median Longitude: -85.018571 * South-bound Latitude: 69.980000 * West-bound Longitude: -96.900000 * North-bound Latitude: 74.400000 * East-bound Longitude: -71.700000
Date/Time Start: 2002-08-01T00:00:00 * Date/Time End: 2004-08-01T00:00:00
Event(s):
Comment:
The covered area given for each stratum is calculated from a strip width equal to the maximum distance at which a sighting was
reported and multiplied by the average probability of detection over that strip, g(x). The estimated coverage is calculated from a strip width equal to the maximum distance at which any sighting was reported in each year, minus the left truncation distance. The strip is then multiplied by the linear survey effort (km) and the average probability of detection over that stratum, g(x), to give the approximate survey coverage.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | Event label | Event | ||||
| 2 | DATE/TIME | Date/Time | Geocode | |||
| 3 | Area/locality | Area | Richard, Pierre R | w = weighted group sizes | ||
| 4 | Area | Area | km2 | Richard, Pierre R | total | |
| 5 | Area | Area | km2 | Richard, Pierre R | covered area for each stratum | |
| 6 | Monodon monoceros | M. monoceros | # | Richard, Pierre R | sightings with distance | |
| 7 | Monodon monoceros, group size | M. monoceros group size | Richard, Pierre R | |||
| 8 | Coefficient | Coeff | Richard, Pierre R | CV; group size | ||
| 9 | Probability | Prob | Richard, Pierre R | of detection over distances g(x) | ||
| 10 | Coefficient | Coeff | Richard, Pierre R | CV; detection probability over distances | ||
| 11 | Area | Area | km2 | Richard, Pierre R | estimated survey coverage | |
| 12 | Probability | Prob | Richard, Pierre R | of detection at track line p(0) | ||
| 13 | Coefficient | Coeff | Richard, Pierre R | CV; detection probability at track line | ||
| 14 | Monodon monoceros | M. monoceros | # | Richard, Pierre R | surface estimate | |
| 15 | Coefficient | Coeff | Richard, Pierre R | CV; surface estimate |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
169 data points