00000nam 2200000za 4500 9.809224 CaOODSP 20240719113922 cr ||||||||||| 150406s2015 oncdb ob f000 0 eng d CaOODSP eng eng fre n-cn--- Fs70-5/2015-059E-PDF Spatial modelling of narwhal density in fiords during the 2013 High Arctic Cetacean Survey (HACS) [electronic resource] / T. Doniol-Valcroze ... [et al.]. Modélisation spatiale de la densité des narvals dans les fjords pendant l’inventaire des cétacés dans l’Extrême-Arctique (ICE-A) de 2013 Ottawa : Fisheries and Oceans Canada, 2015. v, 31 p. : fig., graphs, maps, tables. Canadian Science Advisory Secretariat research document, 1919-5044 ; 2015/059, Central and Arctic, Quebec, and Newfoundland and Labrador Regions "December 2015." Includes bibliographic references (p. 11-12). Narwhal stocks in Baffin Bay, Jones Sound and Smith Sound were surveyed in the 2013 High Arctic Cetacean Survey (HACS). Previous studies have shown that narwhals spend time inside narrow inlets and fiords on their summer distribution range. Thus, any surveying effort must include these areas to provide a credible abundance estimate. Estimating abundance in fiords, however, creates logistical and statistical difficulties because of their narrow complex shapes and high cliffs, preventing the use of conventional distance sampling based on systematic transects. To address these issues, a two-stage cluster sampling design was used in which fiords designated as primary sampling units were selected in a way that maintained equal probability and systematic coverage. Within each fiord, density and abundance of narwhals was estimated using spatial density modeling. Because no observations were made in West Ellesmere fiords, no abundance estimate was produced. Sightings of narwhals in the other fiords during HACS were highly variable. gccst Fisheries resources gccst Whales gccst Fishing area gccst Fisheries management Doniol-Valcroze, Thomas, 1976- Canada. Department of Fisheries and Oceans. Canadian Science Advisory Secretariat. Research document (Canadian Science Advisory Secretariat) 1919-5044 ; 2015/059, Central and Arctic, Quebec, and Newfoundland and Labrador Regions (CaOODSP)9.507396 PDF 2.17 MB https://publications.gc.ca/collections/collection_2016/mpo-dfo/Fs70-5-2015-059-eng.pdf