Download or read book Aerial and Ship based Surveys of Steller Sea Lions Eumetopias Jubatus Conducted in Alaska in June July 2008 Through 2012 and an Update on the Status and Trend of the Western Distinct Population Segment in Alaska written by Kathryn Lynne Sweeney and published by . This book was released on 2013 with total page 91 pages. Available in PDF, EPUB and Kindle. Book excerpt: There is strong evidence that both the western and eastern distinct population segments (DPSs) of Steller sea lion (Eumetopias jubatus) increased in overall abundance in Alaska between 2000 and 2012. Counts of both non-pups (adults and juveniles) and pups during the breeding season in the western DPS were lowest in 2000, and increased at average rates of 1.67% per year (95% credible interval of 1.01-2.38% per year) and 1.45% per year (0.69-2.22% per year), respectively through 2012. However, there was considerable regional variability in non-pup and pup trends in 2000-2012 across the western DPS, with strong evidence of increases in three of the four regions east of Samalga Pass (eastern and western Gulf of Alaska, and eastern Aleutian Islands; ranges of 2.39% per year to 4.51% per year for non-pups and 3.03% per year to 3.97% per year for pups) being offset somewhat by both weak and strong declines in the two regions west of Samalga Pass (central and western Aleutian Islands; slow, uncertain declines in the central [-0.56% per year and -0.46% per year for non-pups and pups, respectively] and steep, certain declines in the western Aleutians [-7.23% per year and -9.36% per year for non-pups and pups, respectively]). Within the central Aleutian Islands, non-pup and pup trends varied east and west of 177°W (roughly Tanaga Pass): in the two rookery cluster areas to the east, trends were generally positive (0.51% per year and 2.25% per year for non-pups, and 2.56% per year and 0.45% per year for pups), while to the west, there was strong evidence of decline (-4.48% per year and -3.24% per year for non-pups, and -4.83% per year and -1.74% per year for pups). In southeast Alaska (eastern DPS of Steller sea lion), both non-pup and pup counts increased between 2000 and 2010, continuing the upward trend begun in the mid-1970s. Movement of young Steller sea lions into and out of the eastern Gulf of Alaska was observed during surveys conducted 'early' and 'late' in 2008, 2009 and 2010. Analysis of the movement of sea lions branded as pups in 2000-2011 on rookeries extending from southeast Alaska through the Kodiak archipelago (including work by Jemison et al. in review) suggests a net movement from the central to the eastern Gulf of Alaska of ~1,600 sea lions during the breeding season, as well as a smaller net movement (of ~180 sea lions) from southeast Alaska to the western DPS. Inter-regional movement of this magnitude within the western DPS could affect regional trend estimation, and therefore it may be inappropriate to treat the eastern and central Gulf of Alaska as 'closed' populations; non-pup counts in the combined eastern-central Gulf of Alaska increased at 2.40% per year between 2000 and 2012. Average annual inter-DPS movement represents

Download or read book ber Die an Kammbildungen Erinnernden Merkmale Des Menschlichen Sch dels written by Jindřich Matiegka and published by . This book was released on 1906* with total page 81 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerial and Land based Surveys of Steller Sea Lions Eumetopias Jubatus in Alaska June and July 1999 and 2000 written by John L. Sease and published by . This book was released on 2001 with total page 130 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fishery Bulletin written by and published by . This book was released on 2014 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerial and Ship based Surveys of Steller Sea Lions Eumetopias Jubatus in Southeast Alaska the Gulf of Alaska and Aleutian Islands During June and July 1991 written by Richard L. Merrick and published by . This book was released on 1992 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerial and Ship based Surveys of Steller Sea Lions Eumetopias Jubatus in Southeast Alaska the Gulf of Alaska and Aleutian Islands During June and July 1994 written by J. Michael Strick and published by . This book was released on 1997 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerial and Ship based Surveys of Steller Sea Lions Eumetopias Jubatus in Southeast Alaska the Gulf of Alaska and Aleutian Islands During June and July 1992 written by and published by . This book was released on 1993 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Canadian Journal of Fisheries and Aquatic Sciences written by and published by . This book was released on 2014-05 with total page 666 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Recovery Plan for the Steller Sea Lion Eumetopias Jubatus written by and published by . This book was released on 1992 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerial and Ship based Surveys of Northern Sea Lions Eumetopias Jubatus in the Gulf of Alaska and Aleutian Islands During June and July 1990 written by Richard L. Merrick and published by . This book was released on 1991 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerial and Land based Surveys of Steller Sea Lions Eumetopias Jubatus from the Western Stock in Alaska June and July 2001 and 2002 written by John L. Sease and published by . This book was released on 2002 with total page 45 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerial Ship and Land based Surveys of Steller Sea Lions Eumetopias Jubatus in the Western Stock in Alaska June and July 2003 and 2004 written by Lowell W. Fritz and published by . This book was released on 2005 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerial Ship and Land based Surveys of Steller Sea Lions Eumetopias Jubatus in Alaska June and July 2005 2007 written by and published by . This book was released on 2008 with total page 70 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerial and Land based Surveys of Steller Sea Lions Eumetopias Jubatus in Alaska June and July 1996 written by and published by . This book was released on 1999 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Decline of the Steller Sea Lion in Alaskan Waters written by National Research Council and published by National Academies Press. This book was released on 2003-05-04 with total page 217 pages. Available in PDF, EPUB and Kindle. Book excerpt: For an unknown reason, the Steller sea lion population in Alaska has declined by 80% over the past three decades. In 2001, the National Research Council began a study to assess the many hypotheses proposed to explain the sea lion decline including insufficient food due to fishing or the late 1970s climate/regime shift, a disease epidemic, pollution, illegal shooting, subsistence harvest, and predation by killer whales or sharks. The report's analysis indicates that the population decline cannot be explained only by a decreased availability of food; hence other factors, such as predation and illegal shooting, deserve further study. The report recommends a management strategy that could help determine the impact of fisheries on sea lion survival-establishing open and closed fishing areas around sea lion rookeries. This strategy would allow researchers to study sea lions in relatively controlled, contrasting environments. Experimental area closures will help fill some short-term data gaps, but long-term monitoring will be required to understand why sea lions are at a fraction of their former abundance.

Download or read book Aerial and Land based Surveys of Steller Sea Lions Eumetopias Jubatus in Alaska June and July 1997 and 1998 written by John L. Sease and published by . This book was released on 1999 with total page 61 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Steller Sea Lion and Northern Fur Seal Research Purpose and need Alternatives Affected environment Environmental consequences National Environmental Policy Act compliance implementation and recommendations List of preparers List of agencies organizations and persons whom the draft EIS was sent References Index written by United States. National Marine Fisheries Service. Office of Protected Resources. Permits Division and published by . This book was released on 2007 with total page 1124 pages. Available in PDF, EPUB and Kindle. Book excerpt: