5 results for "Steven H Ferguson"
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Assessing seasonal spatial segregation by age class of beluga whales ( Delphinapterus leucas ) in Western Hudson Bay estuaries
Segregation of adult males from adult females and immature animals is known to occur in some beluga whale populations, but it is unclear if such segregation occurs in Hudson Bay, where the largest summering population in the world is found. Using imagery from a photographic aerial survey conducted…
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Amino acid δ 15 N differences consistent with killer whale ecotypes in the Arctic and Northwest Atlantic
Ecotypes are groups within a species with different ecological adaptations than their conspecifics. Eastern North Pacific (ENP) killer whale (Orcinus orca) ecotypes differ in their diet, behavior, and morphology, but the same is not known for this species in the eastern Canadian Arctic (ECA) and…
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Beluga whale summer habitat associations in the Nelson River estuary, western Hudson Bay, Canada
To understand beluga whale (Delphinapterus leucas) estuarine use in the Nelson River estuary, southwest Hudson Bay, we recorded and examined beluga movements and habitat associations for the July through August period in 2002–2005. We compared locations of belugas fitted with satellite transmitters…
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Evidence of molting and the function of “rock-nosing” behavior in bowhead whales in the eastern Canadian Arctic
Bowhead whales (Balaena mysticetus) have a nearly circumpolar distribution, and occasionally occupy warmer shallow coastal areas during summertime that may facilitate molting. However, relatively little is known about the occurrence of molting and associated behaviors in bowhead whales. We…