[MARMAM] New paper on long-beaked common dolphin abundance in California waters

Jim Carretta jim.carretta at noaa.gov
Wed Mar 7 15:41:59 PST 2012


Dear friends,



A new publication on the abundance and distribution of long-beaked common
dolphin (Delphinus capensis) in California and western Baja California
waters has just been published:



Carretta, J.V., S.J. Chivers, and W.L. Perryman.  2011.  Abundance of the
long-beaked common dolphin (Delphinus capensis) in California and western
Baja California waters estimated from a 2009 ship-based line-transect
survey.  Bulletin Southern California Academy of Sciences 110(3):152-164.



Abstract -  The abundance of the long-beaked common dolphin (Delphinus
capensis) is estimated from data collected during a 2009 ship-based
line-transect survey.  The survey was designed to provide fine-scale
coverage of the known range of D. capensis along the California and west
Baja California coasts.  Estimates of D. capensis abundance presented are
the highest to date for California waters and may reflect a combination of
improved survey design for this species and increasing numbers of D.
capensis in state waters.  Estimates of D. capensis abundance within
California waters are 183,396 (CV=0.41, 95% CI 78,149 - 379,325) animals.
 An additional 95,786 (CV=0.47, 95% CI 36,881 - 209,507) D. capensis were
estimated in Baja California waters from the U.S./Mexico border south to
the tip of Baja California.  Total estimated abundance of D. capensis in
California and Baja California west coast waters is 279,182 (CV=0.31, 95%
CI 148,753 - 487,323) animals.



This paper can be found at the Southwest Fisheries Science Center (NOAA)
website:



http://swfsc.noaa.gov/textblock.aspx?Division=PRD&ParentMenuId=148&id=1253



Sincerely, Jim Carretta
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