White sharks are highly migratory and segregate by sex, age and size. Unlike marine mammals, they neither surface to breathe nor frequent haul-out sites, hindering generation of abundance data required to estimate population size. A recent tag-recapture study used photographic identifications of white sharks at two aggregation sites to estimate abundance in “central California” at 219 mature and sub-adult individuals. They concluded this represented approximately one-half of the total abundance of mature and sub-adult sharks in the entire eastern North Pacific Ocean (ENP).
Original Source [2]
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Links:
[1] http://admin.indiaenvironmentportal.org.in/feature-article/re-evaluation-size-white-shark-carcharodon-carcharias-population-california-usa
[2] http://http://www.plosone.org/article/info%3Adoi%2F10.1371%2Fjournal.pone.0098078;jsessionid=E9A1F71535C89F21DB30DC66673E97AC
[3] http://admin.indiaenvironmentportal.org.in/category/author/george-h-burgess
[4] http://admin.indiaenvironmentportal.org.in/category/author/barry-d-bruce
[5] http://admin.indiaenvironmentportal.org.in/category/author/gregor-m-cailliet-et-al
[6] http://admin.indiaenvironmentportal.org.in/category/journal/plos-one
[7] http://admin.indiaenvironmentportal.org.in/category/thesaurus/marine-life
[8] http://admin.indiaenvironmentportal.org.in/category/thesaurus/endangered-species
[9] http://admin.indiaenvironmentportal.org.in/category/thesaurus/united-states-america-us
[10] http://admin.indiaenvironmentportal.org.in/category/thesaurus/mammals
