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Spatial modelling of narwhal density in fiords during the 2013 High Arctic Cetacean Survey (HACS) / T. Doniol-Valcroze ... [et al.]. : Fs70-5/2015-059E-PDF

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.

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publications.gc.ca/pub?id=9.809224&sl=1

Renseignements sur la publication
Ministère/Organisme
  • Canada. Department of Fisheries and Oceans.
  • Canadian Science Advisory Secretariat.
TitreSpatial modelling of narwhal density in fiords during the 2013 High Arctic Cetacean Survey (HACS) / T. Doniol-Valcroze ... [et al.].
Variante du titre
  • Modélisation spatiale de la densité des narvals dans les fjords pendant l’inventaire des cétacés dans l’Extrême-Arctique (ICE-A) de 2013
Titre de la série
  • Canadian Science Advisory Secretariat research document, 1919-5044 ; 2015/059, Central and Arctic, Quebec, and Newfoundland and Labrador Regions
Type de publicationMonographie - Voir l'enregistrement principal
Langue[Anglais]
FormatTexte numérique
Document électronique
Note(s)
  • "December 2015."
  • Includes bibliographic references (p. 11-12).
Information sur la publication
  • Ottawa : Fisheries and Oceans Canada, 2015.
Auteur / Contributeur
  • Doniol-Valcroze, Thomas, 1976-
Descriptionv, 31 p. : fig., graphs, maps, tables.
Numéro de catalogue
  • Fs70-5/2015-059E-PDF
Descripteurs
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