Estimates of the Abundance of Cetaceans in the Central North Atlantic based on the NASS Icelandic and Faroese Shipboard Surveys Conducted in 2015
DOI:
https://doi.org/10.7557/3.4941Keywords:
NASS, North Atlantic, cetaceans, abundance, surveys, Balaenoptera, physalus, musculus, borealis, acutorostrata, Megaptera, Physeter, Globicephala, Hyperoodon, LagenorhynchusAbstract
The North Atlantic Sightings Survey (NASS), the sixth in a series of surveys conducted between 1987 and 2015, was conducted in June/July 2015 and covered a large area of the northern North Atlantic. The Icelandic and Faroese ship survey component of the NASS covered the area between the Faroe Islands and East Greenland from latitude 52° to 72° N. The survey used 3 vessels and an independent double-platform configuration with each platform staffed by a minimum of 2 observers. Here we present both uncorrected abundance estimates derived using Multiple Covariates Distance Sampling, and corrected abundance estimates derived using Mark-Recapture Distance Sampling, for the following species: fin (Balaenoptera physalus), common minke (B. acutorstrata), humpback (Megaptera novaeangliae), blue (B. musculus), sei (B. borealis), sperm (Physeter macrocephalus), long-finned pilot (Globicephala melas) and northern bottlenose (Hyperoodon ampullatus) whales as well as white-beaked (Lagenorhynchus albirostris) and white-sided (L. acutus) dolphins. We then compare these estimates to those from previous NASS and put them into context with estimates from adjoining areas of the North Atlantic.
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Øien, N., & Hartvedt, S. (2011). Northern bottlenose whales Hyperoodon ampullatus in Norwegian and adjacent waters. Document SC/63/SM1 for the IWC Scientific Committee.
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Copyright (c) 2019 Daniel Pike, Thorvaldur Gunnlaugsson, Bjarni Mikkelsen, Sverrir D. Halldórsson, Gísli Víkingsson
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