00000nam 2200000za 4500 9.846189 CaOODSP 20221107153136 cr ||||||||||| 171026s2017 oncbd obs f000 0 eng d CaOODSP eng eng fre n-cnh-- Fs70-5/2017-061E-PDF Estimated abundance of the Western Hudson Bay beluga stock from the 2015 visual and photographic aerial survey [electronic resource] / Cory J.D. Matthews ... [et al.]. Ottawa : Fisheries and Oceans Canada, Canadian Science Advisory Secretariat, 2017. v, 20 p. : col. charts, maps Canadian Science Advisory Secretariat (CSAS), research document, 1919-5044 ; 2017/061, Central and Arctic Region Cover title. “October 2017.” Includes bibliographical references. “Aerial visual and photographic surveys of summering Western Hudson Bay (WHB) beluga (Delphinapterus leucas) were conducted in August 2015 to update the previous stock abundance estimate from 2004. The survey area comprised five strata (three visual and two photographic) encompassing high use areas around three river estuaries where recurring aggregations of WHB beluga are found during the summer months. The photographic surveys completely covered high density aggregations in the Churchill River and near the mouth of the Seal River. Poor weather conditions prevented replicated surveys of all but the Churchill River photographic stratum. Near-surface abundance estimates for each stratum were adjusted for availability bias using dive data collected from eight satellite-tagged WHB belugas during the same period as the aerial survey. Summed corrected stratum abundance estimates provided a total stock abundance estimate of 54,473"--Abstract, p. iv. Includes abstract in French. gccst Whales gccst Animal populations gccst Fisheries management gccst Wildlife management Matthews, Cory J. D. (Cory Joseph David), 1977- Canada. Department of Fisheries and Oceans. Canadian Science Advisory Secretariat. Research document (Canadian Science Advisory Secretariat) 1919-5044 ; 2017/061, Central and Arctic Region (CaOODSP)9.507396 PDF 968 KB https://publications.gc.ca/collections/collection_2017/mpo-dfo/Fs70-5-2017-061-eng.pdf