00000cam 2200000zi 4500 9.956233 CaOODSP 20251205084908 m o d f cr mn||||||||| 251010t20252025bcca ob f000 0 eng d 9780660792989 CaOODSP eng rda CaOODSP eng eng fre n-cn-bc pn----- x7y2 Fs97-6/3726E-PDF Towers, Jared R., author. Photo-identification catalogue and status of the coastal subset of the west coast transient population of Bigg's killer whale in British Columbia, Canada / by Jared R. Towers, Gary J. Sutton, Tasli J.H. Shaw, Danielle S. Conry, Mark Malleson, John Forde and Thomas Doniol-Valcroze. Nanaimo, BC : Fisheries and Oceans Canada, Science Branch, Pacific Region, Pacific Biological Station, 2025. ©2025 1 online resource (vi, 203 pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian technical report of fisheries and aquatic sciences, 1488-5379 ; 3726 Includes bibliographical references (pages 9-14). "Bigg's killer whales have been photo-identified in British Columbia for decades. This report uses a 67-year archive of photo-identification data from 1958-2024 to first examine trends in data collection, occurrence and discovery of unique Bigg's killer whales within the province. In total, 945 individuals known from BC, 571 of which were alive in 2024, were photo-identified during 10,390 encounters between California and Alaska. The overall number of encounters and individuals identified each year increased steadily during the study period. Secondly, three criteria including number of years since last documented, total number of encounters and years documented were used to define a subset of individuals in the threatened West Coast Transient population, which due to their preferences for coastal waters is most likely to be impacted by human activities. This coastal subset (CS) included 385 individuals of which 243 were sexually mature in 2024. Third, by including known and assumed deceased kin, growth for the CS was retrospectively calculated at an average annual rate of 1.9% between 2019 and 2024 and 2.9% between 1994 and 2024. Finally, identification images of the left and right sides of dorsal fins, saddle patches and eyepatches for each CS individual alive to date in 2025 are provided along with information on birth years, sex, maternal ancestry and social cohesion"--Abstract, page iv. Includes abstracts in English and French. Killer whale Photographic identification British Columbia Pacific Coast. Whale populations British Columbia Pacific Coast. Orque Photo-identification Colombie-Britannique Pacifique, Côte du. Baleines Populations Colombie-Britannique Pacifique, Côte du. Canada. Department of Fisheries and Oceans, issuing body. Pacific Biological Station (1972- ), issuing body. Canadian technical report of fisheries and aquatic sciences ; 3726. (CaOODSP)9.504449 PDF 214.00 MB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-6/Fs97-6-3726-eng.pdf