(Table 2) Survey effort and number of sightings of narwhals (Monodon monoceros) in east and west Greenland waters ...

• Main Authors: Heide-Jørgensen, Mads Peter, Laidre, Kristin L, Burt, M L, Borchers, D L, Marques, Tiago A, Hansen, R G, Rasmussen, M, Fossette, S
• Format: Dataset
• Language: English
• Published: PANGAEA 2010
• Subjects: Event label; Province; Area/locality; Length; Monodon monoceros; Number; Whale watching; Multiple investigations; Greenland; narwhal*
• Online Access: https://dx.doi.org/10.1594/pangaea.811011; https://doi.pangaea.de/10.1594/PANGAEA.811011

Note that the number of unique sightings is the number of sightings seen by observer 1 plus the number seen by observer 2, minus duplicates. ...