Population Growth and Status of California Sea Lions - Free download as PDF File (.pdf), Text File (.txt) or read online for free. In a historic rebound, California sea otters, the frolicking ocean ambassadors of Monterey Bay and Big Sur, have reached their highest population level since 1982, when federal and state officials … Population assessments initially demonstrated that California sea lions had reached OSP, but continued exponential growth indicated from the 2006 to 2008 pup counts suggest the population is not yet at OSP. It has taken plenty time involved with observing them in order for researchers to be able to break it down for us. Noticeable reductions or depletions have occurred in the abundance of Steller sea lion, harbour seal, northern fur seal and some sea bird populations in the Gulf of Alaska and Bering Sea. The social structure of Sea Lions works well for them but it can seem chaotic to an outsider looking in. California sea lions can also live in fresh water for periods of time, such as near Bonneville Dam, nearly 150 miles (240 km) up the Columbia River. Minimum Population Estimate population from live and dead pup counts has been developed using the life table for the northern fur seal and the growth rate of the California sea lion population. Published 2018. Additional surveys are needed to affirm California harbor seal status. Multiplying the number of pups born by the inverse of these fractions (4.39 to 4.19) results in population estimates ranging from 214,000 to 204,000 (respectively). In 2004 a healthy sea lion was found sitting on a road in Merced County, California, almost a hundred miles upstream from the San Francisco Bay and half a mile from the San Joaquin River. et al. Population Status and Trends of the California Sea Lion (Zalophus californianus californianus) in the Gulf of California, Mexico These eared seals top out at speeds of some 25 miles an hour. This article is a U.S. Government work and is in the public domain in the USA. Their models based on past population shifts predict that an increase of 1 degree C in sea surface temperature off the West Coast will reduce sea lion population growth to zero, while an increase of 2 degrees will lead to a 7 percent decline in the population. Reasons for Population Decline. From a live pup count of 48,277 and ea rly pup mortality of 15% in 2005 and a correction factor of 4.28, we predict a total population size of 238,000 sea lions in U.S. waters. Nous voudrions effectuer une description ici mais le site que vous consultez ne nous en laisse pas la possibilité. Sea Lion Social Behavior. Research Article published in The Journal of Wildlife Management about the population of California sea lions that has increased steadily since the early 1970s. Wiley Online Library. Population Growth and Status of California Sea Lions - Free download as PDF File (.pdf), Text File (.txt) or read online for free. In this analysis we developed a critical tool for management of California sea lions that provides a better understanding of the population dynamics and a scientific foundation upon which to base management decisions related to complex resource issues involving this species. But in the wild, the California sea lion is a sleek animal, faster than any other sea lion or seal. Age‐ and sex‐specific survival of California sea lions (Zalophus californianus) at San Miguel Island, California ... Sharon R. Melin and James V. Carretta, Population growth and status of california sea lions, The Journal of Wildlife Management, 82, 3, (583-595), (2018).