Factors Affecting Distribution And Reproductive Success In Elephant Seals Mirounga Angustirostris At Point Reyes PDF Download
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Author | : Jessica Cinnamon Pettee |
Publisher | : |
Total Pages | : 170 |
Release | : 1999 |
Genre | : |
ISBN | : |
Download Factors Affecting Distribution and Reproductive Success in Elephant Seals (Mirounga Angustirostris) at Point Reyes Book in PDF, ePub and Kindle
Author | : Sarah Allen |
Publisher | : CreateSpace |
Total Pages | : 38 |
Release | : 2013-08-06 |
Genre | : |
ISBN | : 9781491298145 |
Download Northern Elephant Seal Monitoring (Mirounga Angustirostris) at Point Reyes National Seashore 2008-2009 Breeding Seasons Book in PDF, ePub and Kindle
Northern elephant seals (Mirounga angustirostris) established a breeding population at Point Reyes National Seashore (PORE) in 1981 and since then the colony has grown steadily (Allen et al. 1989). Currently, elephant seals breed at numerous sites within PORE, with four primary sites located at Drake's Beach (DB), Point Reyes Headland (PRH), South Beach (SB), and Chimney Rock Loop (CRL). PORE began to monitor the elephant seal population to contribute to the understanding of population changes and management needs, and to develop research, interpretation and enforcement strategies. A pinniped monitoring protocol was developed in 2009 and includes objectives for monitoring elephant seals to determine trends population growth and productivity.
Author | : Ian Stewart Wilkinson |
Publisher | : |
Total Pages | : |
Release | : 2014 |
Genre | : |
ISBN | : |
Download Factors Affecting Reproductive Success of Southern Elephant Seals, Mirounga, at Marion Island Book in PDF, ePub and Kindle
Author | : Joshua Matthew Elliott |
Publisher | : |
Total Pages | : 110 |
Release | : 1999 |
Genre | : Northern elephant seal |
ISBN | : |
Download The Effects of Weaning Weight on Lifetime Reproductive Success in the Northern Elephant Seal (Mirounga Angustirostris) Book in PDF, ePub and Kindle
Author | : Ian Stewart Wilkinson |
Publisher | : |
Total Pages | : 185 |
Release | : 1991 |
Genre | : |
ISBN | : |
Download Factors Affecting Reproductive Success of Southern Elephant Seals, Mirounga Leonina, at Marion Island Book in PDF, ePub and Kindle
Author | : Joanne Reiter |
Publisher | : |
Total Pages | : 226 |
Release | : 1987 |
Genre | : Competition (Biology) |
ISBN | : |
Download Studies of Female Competition and Reproductive Success in the Northern Elephant Seal Book in PDF, ePub and Kindle
Author | : Emma Hatton Levy |
Publisher | : |
Total Pages | : 0 |
Release | : 2022 |
Genre | : Northern elephant seal |
ISBN | : |
Download Northern Elephant Seal (Mirounga Angustirostris) Colony Establishment and Growth in the King Range National Conservation Area, California Book in PDF, ePub and Kindle
The King Range colony is the northernmost successful and expanding breeding site for northern elephant seals (Mirounga angustirostris). To evaluate the composition and growth of this colony, I conducted systematic surveys recording counts, age classes, births, and resighting seals with individually identifiable flipper tags. The timing of life-history events (breeding, molting, and resting) of all elephant seal sex and age groups at the King Range was consistent with observations at other colonies. Colony counts during breeding and molting have increased steadily over the 4-year study period (2018-2021), and pup production has increased by 87% since the first year of monitoring. The main driver of colony growth was juvenile elephant seals dispersing from colonies in central California, as revealed by the majority of tag resights being of juveniles from Point Reyes. Juvenile seasonal haul out behavior differed with a higher percentage of ‘new’ juveniles seen in the fall than in the spring and higher variability in seasonal arrival date, tenure, and number of visits in the fall resting haul out than during the spring molt. This difference may be due to the extreme physiological demands on elephant seals during their spring molt, which is absent during the fall. This growing northern elephant seal colony will likely become a seed colony for further northern dispersal as this species continues to be impacted by global climate change. By documenting juvenile dispersal and colony growth, I provide information to managers and the public for use in preparing and managing conflicts that might arise with the predicted expansion and redistribution of this species.
Author | : Charles Joseph Deutsch |
Publisher | : |
Total Pages | : 564 |
Release | : 1990 |
Genre | : Northern elephant seal |
ISBN | : |
Download Behavioral and Energetic Aspects of Reproductive Effort of Male Northern Elephant Seals (Mirounga Angustirostris) Book in PDF, ePub and Kindle
Author | : Burney J. Le Beouf |
Publisher | : Univ of California Press |
Total Pages | : 434 |
Release | : 2022-07-15 |
Genre | : Nature |
ISBN | : 0520368177 |
Download Elephant Seals Book in PDF, ePub and Kindle
The largest of all seals, elephant seals rank among the most impressive of marine mammals. They are renowned for their spectacular recovery from near-extinction at the end of the nineteenth century when seal hunters nearly eliminated the entire northern species. No other vertebrate has come so close to extinction and made such a complete recovery. The physiological extremes that elephant seals can tolerate are also remarkable: females fast for a month while lactating, and the largest breeding males fast for over one hundred days during the breeding seasons, at which times both sexes lose forty percent of their body weight. Elephant seals dive constantly during their long foraging migrations, spending more time under water than most whales and diving deeper and longer than any other marine mammal. This first book-length discussion of elephant seals brings together worldwide expertise from scientists who describe and debate recent research, including the history and status of various populations, their life-history tactics, and other findings obtained with the help of modern microcomputer diving instruments attached to free-ranging seals. Essential for all marine mammalogists for its information and its methodological innovations, Elephant Seals will also illuminate current debates about species extinctions and possible means of preventing them. This title is part of UC Press's Voices Revived program, which commemorates University of California Press’s mission to seek out and cultivate the brightest minds and give them voice, reach, and impact. Drawing on a backlist dating to 1893, Voices Revived makes high-quality, peer-reviewed scholarship accessible once again using print-on-demand technology. This title was originally published in 1994.
Author | : Dawn Adams |
Publisher | : CreateSpace |
Total Pages | : 30 |
Release | : 2013-08-06 |
Genre | : |
ISBN | : 9781491298176 |
Download Northern Elephant Seal Monitoring 2005-2007 Report, Point Reyes National Seashore Book in PDF, ePub and Kindle
After having been extirpated to near extinction at the turn of the century, northern elephant seals (Mirounga angustirostris) have re-established breeding colonies on isolated beaches and offshore islands along the California coast since the 1950's (Stewart et al. 1994). In 1981, the first northern elephant seal birth was recorded at an isolated pocket beach at the Point Reyes National Seashore (PORE; Allen et al. 1989).