Slow dating beluga

Stocks Though all living belugas belong to the same species and are generally confined to Arctic regions, they are sometimes further classified by the “stocks” (or subpopulations) to which they belong (COSEWIC, 2004; IWC, 2000; Martin and Richard, 2001), which are genetically isolated from others stocks.Stocks are also identified by distribution and migration patterns, morphological characteristics, and DNA.The warmer waters of the estuary may also benefit neonate calves, with their thin blubber layer and dependence on their mother.Females and their calves are especially tied to the estuary and are the first to return after a disturbance, such as boats or hunting (O'Corry-Crowe et al., 1997).Discrete populations are found off the coasts of Alaska, Canada, Russia, Norway and Greenland (Martin, 1996).Occasionally, belugas travel much farther south; lone belugas have been sighted in Long Island Sound and near Cape Cod (Frady, 2004; Katona et al., 1993).

Belugas are found only in the Northern Hemisphere—in Arctic and subarctic waters.These patterns indicate that belugas possess an ability to move freely between salt and fresh water, an ability that most other cetaceans do not have (Martin, 1996).In addition, belugas have been sighted in various waters of various depths from extremely shallow waters to deep underwater trenches (Schreer and Kovacs, 1997).Less than 4 million years ago, now-extinct monodontids lived only in temperate and subtropical waters.The earliest fossil of a beluga and narwhal as we know them today were found in Canada.

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