Movements of Beluga Whales (Delphinapterus Leucas) in Bristol
MARINE MAMMAL SCIENCE, **(*): ***–*** (*** 2016) © 2016 Society for Marine Mammalogy DOI: 10.1111/mms.12337 Movements of beluga whales (Delphinapterus leucas)in Bristol Bay, Alaska 1 JOHN J. CITTA AND LORI T. QUAKENBUSH, Alaska Department of Fish and Game, 1300 College Road, Fairbanks, Alaska 99701, U.S.A.; KATHRYN J. FROST AND LLOYD LOWRY, School of Fisheries and Ocean Science, University of Alaska, 73-4388 Paiaha Street, Kailua Kona, Hawaii 96740, U.S.A.; RODERICK C. HOBBS, National Marine Mammal Laboratory, Alaska Fisheries Science Center, National Marine Fisheries Service, 7600 Sand Point Way N.E., Seattle, Washington 98115, U.S.A.; HELEN ADERMAN, Bristol Bay Native Association, PO Box 310, Dillingham, Alaska 99576, U.S.A. Abstract We describe the annual distribution of beluga whales (Delphinapterus leucas)in Bristol Bay, Alaska, using data from 31 satellite-linked transmitters during 2002– 2011. Bristol Bay has one of the largest and best studied Pacific salmon (Oncorhynchus spp.) fisheries in the world, allowing us to link the seasonal distribution of belugas to that of salmon. During salmon migrations, beluga movements were restricted to river entrances. Belugas generally did not relocate to different river entrances or change bays during peak salmon periods. However, the location of belugas was not related to the number of salmon passing counting towers, suggesting that belugas were either selecting locations that were good for catching salmon or there were sim- ply more salmon than belugas needed to supply their nutritional needs. The distri- bution of belugas expanded after salmon runs ended, and was greatest in winter when belugas ranged beyond the inner bays, traveling as far west as Cape Constan- tine.
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