Mortality Rates of Beaver in Newfoundland

Payne, Neil F.

doi:10.2307/3808459

Cited by 24 publications

(24 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Mean annual mortality for American beavers in a harvested population in Newfoundland, Canada was 28% (Payne ). Mortality rates in an unharvested population were slightly lower (24%; Payne ).…”

Section: Discussionmentioning

confidence: 99%

Ear‐tag loss rates in American beavers

Windels¹

2013

Wildl. Soc. Bull.

View full text Add to dashboard Cite

External marking of American beavers (Castor canadensis) is essential to studies of population dynamics and behavior of individuals. Application of metal ear tags is a common method used to mark beavers but rates and causes of ear‐tag loss have been insufficiently documented. I live‐trapped and tagged 627 beavers in Voyageurs National Park, Minnesota, USA, from 2006 to 2012 with a single, uniquely numbered no. 3 monel ear tag in each ear. Beavers recaptured or recovered via live‐trapping (n = 178), legal harvest outside of the park (n = 55), or death (n = 4) up to 6 years after initial release were inspected for tag loss. An additional 31 beavers were secondarily marked with radiotransmitters and used to test the assumption that loss of one ear tag was independent of loss of the other. Six percent (15 out of 237) of beavers lost a single ear tag. Overall probability of beavers losing a single ear tag was low (3.3%) and did not differ by sex, age class, or method of recapture–recovery. Tag loss was highest within 6 months of initial tagging, but probability of tag loss was not related to time between tagging and recovery up to 6 years after tagging. None of the radioed beavers lost both ear tags, supporting the assumption of independence of ear‐tag loss among individual beavers. Ear‐tag loss rates are sufficiently low that studies of American beavers that rely on mark–recapture methods do not need to account for bias from ear‐tag loss. Published 2013. This article is a U.S. Government work and is in the public domain in the USA.

show abstract

Section: Discussionmentioning

confidence: 99%

Ear‐tag loss rates in American beavers

Windels¹

2013

Wildl. Soc. Bull.

View full text Add to dashboard Cite

show abstract

“…Low temperatures with light snowfall can increase the beaver's energy needs by robbing the lodge of its insulating layer of snow (Payne 1984). In addition, in colder climates, sufficiently large food caches become essential for the survival of beavers (Hartman and Axelsson 2004), and freezing of the watercourses in winter makes acquisition of both timber wood and food more energyconsuming (Breck et al 2001).…”

Section: Colony Density Along the Watercourses And Impact Of Habitat mentioning

confidence: 99%

Abundance and distribution of American beaver, Castor canadensis (Kuhl 1820), in Tierra del Fuego and Navarino islands, Chile

Skewes

Gonzalez

Olave³

et al. 2006

Eur J Wildl Res

View full text Add to dashboard Cite

Castor canadensis specimens were imported from Canada and released in the wilderness on the Argentinean part of Tierra del Fuego (TDF) in the year 1946. First studies on the development of the beaver population and subsequent environmental changes were conducted four decades later and indicated a strong expansion of these animals, with negative effects on the forest, especially the dominant Nothofagus sp. Between 1999 and 2001, we investigated the density of the beaver population in the Chilean part of TDF and the southern adjacent island Navarino (NAV). Data were mapped into a geographical information system. The mean colony density was 1.03 (range: 0.15-1.91) and 1.1 per km watercourse for 75% of the area of TDF (mainly south and central region) and the total NAV island, respectively. The average number of individuals estimated per colony was five. Based on these findings, the number of beavers in the Chilean part of TDF and on NAV was estimated at 61,300 individuals. The population is increasing and expanding in the Northern region, with a linear rate of 2.6-6.3 km/year.

show abstract

“…population( Hemitragus jemlahicus ) [8] 0.927 5.37 −0.012 2.85 21.36 Uinta ground squirrel( Spermophilus armatus ) [42] 0.927 3.62 −0.016 1.59 6.02 Beaver( Castor canadensis ) [34] 0.935 5.55 −0.010 1.80 10.44 Beluga whale( Delphinapterus leucas ) [5] 0.993 14.00 −0.000 16.54 359.54 Golden-mantled ground squirrel( Spermophilus lateralis ) [7] 0.998 2.15 −0.001 0.39 1.10 Western jumping mouse( Zapus princeps ) [13] 0.999 1.96 −0.000 0.75 2.02 Chamois( Rupicapra rupicapra ) [9] 1.000 3.83 −0.000 3.59 18.34 Northern Fur Seal( Callorhinus ursinus ) [4] …”

Section: A1 Standard Theory Revisitedmentioning

confidence: 99%

Linking the population growth rate and the age-at-death distribution

Schindler¹,

Tuljapurkar²,

Gaillard³

et al. 2012

Theoretical Population Biology

View full text Add to dashboard Cite

The population growth rate is linked to the distribution of age at death. We demonstrate that this link arises because both the birth and death rates depend on the variance of age-at-death. This bears the prospect to separate the influences of the age patterns of fertility and mortality on population growth rate. Here, we show how the age pattern of death affects population growth. Using this insight we derive a new approximation of the population growth rate that uses the first and second moments of the age-at-death distribution. We apply our new approximation to 46 mammalian life tables (including humans) and show that it is on par with the most prominent other approximations.

show abstract

Mortality Rates of Beaver in Newfoundland

Cited by 24 publications

References 19 publications

Ear‐tag loss rates in American beavers

Ear‐tag loss rates in American beavers

Abundance and distribution of American beaver, Castor canadensis (Kuhl 1820), in Tierra del Fuego and Navarino islands, Chile

Linking the population growth rate and the age-at-death distribution

Contact Info

Product

Resources

About