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100   $a20120120d2012      ub             0
101 0 $aeng
135   $aur|n|---|||||
181   $ctxt
182   $cc
183   $acr
200 10$aReturn to the sea$b[electronic resource] $ethe life and evolutionary times of marine mammals /$fAnnalisa Berta ; illustrated by James L. Sumich and Carl Buell
205   $a1st ed.
210   $aBerkeley, CA $cUniversity of California Press$d2012
215   $a1 online resource (222 p.)
300   $aDescription based upon print version of record.
311   $a0-520-27057-6 
320   $aIncludes bibliographical references and index.
327   $tFrontmatter -- $tContents -- $tPreface -- $tAcknowledgments -- $tChapter One. Marine Mammals -- $tChapter Two. Past Diversity in Time and Space, Paleoclimates, and Paleoecology -- $tChapter Three. Pinniped Diversity, Evolution, and Adaptations -- $tChapter Four. Cetartiodactylan Diversity, Evolution, and Adaptations -- $tChapter Five. Diversity, Evolution, and Adaptations of Sirenians and Other Marine Mammals -- $tChapter Six. Ecology and Conservation -- $tGlossary -- $tFurther Reading and Online Sources -- $tIllustration Credits -- $tIndex
330   $aReturn to the Sea portrays the life and evolutionary times of marine mammals-from giant whales and sea cows that originated 55 million years ago to the deep diving elephant seals and clam-eating walruses of modern times. This fascinating account of the origin of various marine mammal lineages, some extinct, others extant but threatened, is for the non-specialist. Set against a backdrop of geologic time, changing climates, and changing geography, evolution is the unifying principle that helps us to understand the present day diversity of marine mammals and their responses to environmental challenges. Annalisa Berta explains current controversies and explores patterns of change taking place today, such as shifting food webs and predator-prey relationships, habitat degradation, global warming, and the effects of humans on marine mammal communities.
606   $aMarine mammals$xEvolution
606   $aMarine animals$xEvolution
608   $aElectronic books.
615  0$aMarine mammals$xEvolution.
615  0$aMarine animals$xEvolution.
676   $a599.5/138
700   $aBerta$b Annalisa$0873628
801  0$bMiAaPQ
801  1$bMiAaPQ
801  2$bMiAaPQ
906   $aBOOK
912   $a9910452016803321
996   $aReturn to the sea$92454335
997   $aUNINA