þÿ<html xmlns:v="urn:schemas-microsoft-com:vml" xmlns:o="urn:schemas-microsoft-com:office:office" xmlns:w="urn:schemas-microsoft-com:office:word" xmlns="http://www.w3.org/TR/REC-html40"> <head> <meta name=Title content="HENKEL, L"> <meta name=Keywords content=""> <meta http-equiv=Content-Type content="text/html; charset=unicode"> <meta name=ProgId content=Word.Document> <meta name=Generator content="Microsoft Word 11"> <meta name=Originator content="Microsoft Word 11"> <link rel=File-List href="35_2_145-151_files/filelist.xml"> <title>HENKEL, L</title> <!--[if gte mso 9]><xml> <o:DocumentProperties> <o:Author>Gaston</o:Author> <o:Template>Normal</o:Template> <o:LastAuthor>Benjamin Saenz</o:LastAuthor> <o:Revision>2</o:Revision> <o:TotalTime>0</o:TotalTime> <o:Created>2008-05-12T18:04:00Z</o:Created> <o:LastSaved>2008-05-12T18:04:00Z</o:LastSaved> <o:Pages>1</o:Pages> <o:Words>223</o:Words> <o:Characters>1276</o:Characters> <o:Company>Environment Canada</o:Company> <o:Lines>10</o:Lines> <o:Paragraphs>2</o:Paragraphs> <o:CharactersWithSpaces>1567</o:CharactersWithSpaces> <o:Version>11.1025</o:Version> </o:DocumentProperties> <o:OfficeDocumentSettings> <o:PixelsPerInch>96</o:PixelsPerInch> <o:TargetScreenSize>800x600</o:TargetScreenSize> </o:OfficeDocumentSettings> </xml><![endif]--><!--[if gte mso 9]><xml> <w:WordDocument> <w:Compatibility> <w:UseFELayout/> </w:Compatibility> </w:WordDocument> </xml><![endif]--> <style> <!-- /* Font Definitions */ @font-face {font-family:"Times New Roman"; panose-1:0 2 2 6 3 5 4 5 2 3; mso-font-charset:0; mso-generic-font-family:auto; mso-font-pitch:variable; mso-font-signature:50331648 0 0 0 1 0;} /* Style Definitions */ p.MsoNormal, li.MsoNormal, div.MsoNormal {mso-style-parent:""; margin:0in; margin-bottom:.0001pt; mso-pagination:widow-orphan; font-size:12.0pt; font-family:"Times New Roman";} table.MsoNormalTable {mso-style-parent:""; font-size:10.0pt; font-family:"Times New Roman";} @page Section1 {size:8.5in 11.0in; margin:1.0in 1.25in 1.0in 1.25in; mso-header-margin:35.4pt; mso-footer-margin:35.4pt; mso-paper-source:0;} div.Section1 {page:Section1;} --> </style> <!--[if gte mso 9]><xml> <o:shapedefaults v:ext="edit" spidmax="1027"/> </xml><![endif]--><!--[if gte mso 9]><xml> <o:shapelayout v:ext="edit"> <o:idmap v:ext="edit" data="1"/> </o:shapelayout></xml><![endif]--> </head> <body bgcolor=white lang=EN-US style='tab-interval:.5in'> <div class=Section1> <p class=MsoNormal>HENKEL, L.A., FORD, R.G., TYLER, W.B. &amp; DAVIS, J.N.<span style="mso-spacerun: yes">&nbsp; </span>2007.<span style="mso-spacerun: yes">&nbsp; </span>Comparison of aerial and boat-based survey methods for Marbled Murrelets and other marine birds.<span style="mso-spacerun: yes">&nbsp; </span><i>Marine Ornithology </i><span style='font-style:normal'>35: 145-151</span><i>. <o:p></o:p></i></p> <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p> <p class=MsoNormal>We compared density estimates for marine birds off central California from simultaneous aerial and boat-based surveys, with a special emphasis on Marbled Murrelets <i>Brachyramphus marmoratus</i><span style='font-style:normal'>.<span style="mso-spacerun: yes">&nbsp; </span>We surveyed 44 8-km transects in nearshore waters of Monterey Bay, California, from December 2005 through March 2006.<span style="mso-spacerun: yes">&nbsp; </span>We found that density estimates of all birds combined and of Western/Clark s Grebes </span><i>Aechmophorus occidentalis/clarkii</i><span style='font-style:normal'> were significantly greater from the air than from the boat, but there were no significant differences in density for four other taxa.<span style="mso-spacerun: yes">&nbsp; </span>Density estimates for Marbled Murrelets were nearly identical from the two platforms, with a high degree of correspondence correlation (0.82).<span style="mso-spacerun: yes">&nbsp;&nbsp; </span>Mean species richness was significantly greater from the boat than from the air.<span style="mso-spacerun: yes">&nbsp; </span>For taxa that occurred in large flocks (grebes and gulls), density estimates from the air were substantially greater when abundance was greater.<span style="mso-spacerun: yes">&nbsp;&nbsp; </span>Our results indicate that aerial surveys may provide more accurate density estimates than boat-based surveys for some taxa, under certain conditions.<span style="mso-spacerun: yes">&nbsp; </span>However, density estimates were similar for most taxa, and density estimates from the two platforms based on certain survey methods may be similar enough to be considered directly comparable.<span style="mso-spacerun: yes">&nbsp; </span></span></p> <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p> <p class=MsoNormal><b>Keywords</b><span style='font-weight:normal'>: aerial survey, seabirds, Marbled Murrelet, survey techniques</span></p> <p class=MsoNormal><![if !supportEmptyParas]>&nbsp;<![endif]><o:p></o:p></p> </div> </body> </html>