Marine Mammals

Authored by: Kathleen J. Vigness-Raposa

Encyclopedia of Natural Resources

Print publication date:  July  2014
Online publication date:  June  2014

Print ISBN: 9781439852583
eBook ISBN: 9781351043847
Adobe ISBN:

10.1081/E-ENRW-120047589

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Abstract

Marine mammals are species that utilize the ocean environment for all or part of their life cycle. This includes whales, dolphins, porpoises, seals, sea lions, sea otters, walruses, polar bears, manatees, and dugongs. Land mammals began to live in the ocean over 50 million years ago. Remarkably, new species are still being discovered, both through direct observation and genetic analyses. Advances in research techniques continue to expand our understanding of the unique life histories of marine mammals.

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