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Aug 19, 2020 · INTRODUCTION. This paper is the third review – including short updates the fifth paper – intended to summarise Eurasian beaver Castor fiber distribution change and population development (Nolet & Rosell 1998, Halley & Rosell 2002, 2003, Halley et al. 2012; a population estimate for Europe was also recently presented in a short communication, Wrobel 2020).
- Duncan John Halley, Alexander P. Saveljev, Frank Narve Rosell
- 2021
The head-and-body length of adult North American beavers is 74–90 cm (29–35 in), with the tail adding a further 20–35 cm (7.9–13.8 in). Very old individuals can exceptionally exceed normal sizes, weighing more than 40 kg (88 lb) or even as much as 50 kg (110 lb) (higher than the maximum known for the Eurasian beaver).
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Aug 3, 2022 · 1 INTRODUCTION. Eurasian beavers (Castor fiber) were extirpated from Great Britain (GB) and much of Europe c. 400 years ago (Kitchener & Conroy, 1997).Some isolated populations remained in mainland Europe (Nolet & Rosell, 1998) and, following widespread conservation and natural recovery, beavers have returned to much of their prior extent, with population size estimated at a minimum of 1.5 ...
- 1
- 3, Issue3
- 03 August 2022
Melillo, and Hobbie (1986) the beaver population is estimated to be between 6 and 12 mil lion at the present time. The increase in regional beaver populations, particularly in states with high human densities, has in turn led to an increase in the number of beaver nuisance reports. This is true in all the New England states.
calculation a population model, it hints at an approach that is used in some population models for beaver (e.g., Molini et al. 1981). This example, and the one before it, are characteristic of many studies of population dynamics of beaver which stop short of assembling their results into population models. 2.2 Logistic models
Sep 19, 2002 · The period of rapid population increase, if unchecked, leads to a phase of population decline as marginal habitats are occupied and exhausted. This coincides with a peak in conflicts with human land-use interests. A regulated hunting take of healthy beaver populations is recommended as the optimal management regime in managed landscapes.
This information is preliminary or provisional and is subject to revision. It is being provided to meet the need for timely best science. The information has not received final approval by the U.S. Geological Survey (USGS) and is provided on the condition that neither the USGS nor the U.S. Government shall be held liable for any damages resulting from the authorized or unauthorized use of the ...
