00000nam 2200000zi 4500 9.921178 CaOODSP 20230516100134 m o d f cr mn||||||||| 230322t20232023bccab ob f000 0 eng d 9780660481173 CaOODSP eng rda CaOODSP eng eng fre n-cn-bc pn----- y1y2 Fs97-6/3535E-PDF Burnham, Rianna, author. Implications of fisheries closures on the soundscape in areas used by southern resident killer whales (SRKW) / by Rianna Burnham and Kendra Moore. Sidney, BC : Ocean Sciences Division, Fisheries and Oceans Canada, Institute of Ocean Sciences, 2023. ©2023 1 online resource (v, 69 pages) : colour illustrations, colour maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian technical report of fisheries and aquatic sciences, 1488-5379 ; 3535 Includes bibliographical references (pages 45-51). "Fisheries management measures aim to increase fish stocks; here the potential for an additional acoustic benefit to the Endangered Southern Resident Killer Whale (SRKW, Orcinus orca) by lessening disturbance was assessed. Reductions in ambient broadband noise (10 Hz to 100 kHz) were seen generally during fisheries management actions. Recordings made by moorings in western Juan de Fuca Strait showed the greatest decreases in sound levels. For all sites the changes in the SRKW communication band (500 Hz to 15 kHz) seemed to follow seasonal patterns of wind speed, whereas the echolocation frequency range SRKW (15-100 kHz) and higher frequency sound ranges showed an increasing trend from pre- to during to post-measure periods concurrent to increased recreational vessel presence. Reductions seen in Haro Strait and Boundary Pass (~0.5 dB in median sound levels) may be attributable to the voluntary vessel slowdown in place through the summer"--Abstract, page iii. Includes abstracts in English and French. Underwater acoustics Salish Sea (B.C. and Wash.) Fishery closures Salish Sea (B.C. and Wash.) Ships Noise Environmental aspects Salish Sea (B.C. and Wash.) Killer whale Effect of noise on Salish Sea (B.C. and Wash.) Acoustique sous-marine Salish, Mer des (C.-B. et Wash.) Fermeture de la pêche Salish, Mer des (C.-B. et Wash.) Navires Bruit Aspect de l'environnement Salish, Mer des (C.-B. et Wash.) Orque Effets du bruit sur Salish, Mer des (C.-B. et Wash.) Canada. Department of Fisheries and Oceans, issuing body. Institute of Ocean Sciences, Patricia Bay, issuing body. Canadian technical report of fisheries and aquatic sciences ; 3535. (CaOODSP)9.504449 PDF 2.07 MB https://publications.gc.ca/collections/collection_2023/mpo-dfo/Fs97-6-3535-eng.pdf