(Download) "Nesting Survival and Population Fluctuations of the Prairie Vole Microtus Ochrogaster (Report)" by The American Midland Naturalist # eBook PDF Kindle ePub Free
eBook details
- Title: Nesting Survival and Population Fluctuations of the Prairie Vole Microtus Ochrogaster (Report)
- Author : The American Midland Naturalist
- Release Date : January 01, 2008
- Genre: Life Sciences,Books,Science & Nature,
- Pages : * pages
- Size : 193 KB
Description
INTRODUCTION Changes in survival of young have been suggested as a driving force in population fluctuations of arvicoline rodents (Krebs and Myers, 1974; Gaines and Rose, 1976; Krebs, 1993). Few measures of nestling survival are available, however, owing to the difficulties of finding natal nests and assessing survival without disturbing mothers (Yoccoz et al., 1993; Millar et al., 2004); as a result, the relationship between nestling survival and population dynamics remains unclear for most rodents. Further, the limited data that are available do not yield a consistent pattern. Lambin and Yoccoz (1998) and Millar and McAdam (2001) found high survival of nestlings to be associated with population growth of Microtus townsendii and Peromyscus maniculatus, respectively. Whitney (1976) found that survival of nestling M. oeconomus was consistent with changes in population density, but that survival of nestling Clethrionomys rutilus was low during the early part of the increase phase. Millar et al. (2004) reported that survival of nestling Peromyscus leucopus was unrelated to spring population density and did not influence the intrinsic rate of population increase and Hoffmann (1958) found that survival of nestling M. montanus increased during a population decline. Finally, Getz et al. (1990a, 1990b, 1993) suggested that increased nestling survival is a primary factor associated with increases in population density of the prairie vole M. ochrogaster. However, when they specifically examined survival in relation to phase of population fluctuation, Getz et al. (2000) included data largely for trough and increase phases during a 5-y study in alfalfa habitat; data for the decline phase were available for only one population fluctuation at this site. More extensive data from the decline phase are necessary to examine fully the role of nestling survival in driving population fluctuations of M. ochrogaster.
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