Browsing USN Open Archive by Author "Parker, Howard"
Now showing items 1-17 of 17
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A gross assessment of the suitability of selected Scottish riparian habitats for beaver
Parker, Howard; Holthe, Vidar; Rosell, Frank (Journal article; Peer reviewed, 2000)In November 1998 we were shown a selection of riparian habitats in Scotland and asked to assess their suitability for beaver based on our experience in working with beaver elsewhere. Though many examples of good beaver ... -
Beaver management in Norway : a model for continental Europe?
Parker, Howard; Rosell, Frank (Journal article; Peer reviewed, 2003)While Norway has been managing beaver (Castor fiber) for more than 150 years, most central European countries have little experience and none are presently harvesting beaver, despite rapidly growing populations and conflicts. ... -
Cadmium, copper, and zinc in Eurasian beaver (Castor fiber) from Bø, Telemark, Norway
Fimreite, Norvald; Parker, Howard; Rosell, Frank; Hosen, David Andre; Hovden, Aina; Solheim, Annette (Journal article; Peer reviewed, 2001)Heavy metals are elements present in all forms of life. Of those analysed for in the present study, cadmium (Cd) is toxic and non-essential while copper (Cu) and zinc (Zn) are essential elements, but toxic when certain ... -
Can beaver Castor fiber be selectively harvested by sex and age during spring hunting?
Parker, Howard; Rosell, Frank; Hermansen, Tore André; Sørløkk, Gjermund; Stærk, Martin (Conference report, 2000)In Norway, Sweden and Finland hunting Eurasian beaver Castor fiber Linnaeus, 1758 with firearms is presently the main harvest form and most are shot in late April and early May. As beaver cannot be sexed from external ... -
Ecological impact of beavers Castor fiber and Castor canadensis and their ability to modify ecosystems
Rosell, Frank; Bozser, Orsolya; Collen, Peter; Parker, Howard (Journal article; Peer reviewed, 2005)The genus Castor comprises two species: the Eurasian beaver Castor fiber, and the North American beaver Castor canadensis. Both species suffered from overexploitation, but have seen a revival since the 1920s due to increased ... -
Efficacy of cartridge type and projectile design in the harvest of beaver
Parker, Howard; Rosell, Frank; Danielsen, Johan (Journal article; Peer reviewed, 2006)In Norway, Sweden, and Finland most beavers (Castor spp.) harvested are shot with center-fire rifles. Shooting entails problems not encountered in trapping including pelt damage from bullet holes (body shots are common) ... -
Errors associated with moose-hunter counts of occupied beaver Castor fiber lodges in Norway
Parker, Howard; Rosell, Frank; Gustavsen, Per Øyvind (Journal article; Peer reviewed, 2002)In Norway, Sweden and Finland moose Alces alces hunting teams are often employed to survey occupied beaver (Castor fiber and C. canadensis) lodges while hunting. Results may be used to estimate population density or trend, ... -
Eurasian beavers (Castor fiber) behavioral response to simulated territorial intruders
Rosell, Frank; Johansen, Geir; Parker, Howard (Journal article; Peer reviewed, 2000)Eurasian beavers (Castor fiber) live in family groups that defend territories against other conspecifics. Part of this territorial defence involves constructing scent mounds near the stream bank within territories and ... -
Invasive North American beaver Castor canadensis in Eurasia: a review of potential consequences and a strategy for eradication
Parker, Howard; Nummi, Petri; Hartman, Göran; Rosell, Frank (Journal article; Peer reviewed, 2012-12)Seven North American beavers Castor canadensis (Cc) were introduced into Finland in 1937 to supplement an ongoing reintroduction of the nearly extinct Eurasian beaver C. fiber (Cf). At that time, many zoologists recognised ... -
Investigations of waterborne pathogens in Eurasian beaver (Castor fiber) from Telemark county, Southeast Norway
Rosell, Frank; Rosef, Olav; Parker, Howard (Journal article; Peer reviewed, 2001)The presence of pathogenic bacteria and parasites in drinking water is a well-known cause of human disease outbreaks. There is however, a lack of knowledge of the contamination routes to water. In Norway, the supply of ... -
Landscape use and economic value of Eurasian beaver (Castor fiber) on large forest in southeast Norway
Parker, Howard; Haugen, Asbjørn; Kristensen, Øystein; Myrum, Erik; Kolsing, Ronni; Rosell, Frank (Conference report, 1999)Though numerous studies of damage caused by beaver (Castor canadensis and C. fiber) to commercially managed forests have been conducted, few have incorporated the economic advantages beaver can create for forest owners. ... -
Parturition dates for Eurasian beavers Castor fiber: when should spring hunting cease?
Parker, Howard; Rosell, Frank (Journal article; Peer reviewed, 2001)Hunting Eurasian beaver Castor fiber with firearms during late spring is the dominating harvest form in Norway but may violate the Norwegian wildlife management principle of not hunting during the breeding season. In ... -
Scent-marking in the Eurasian beaver (Castor fiber) as a means of territory defense
Rosell, Frank; Bergan, Frode; Parker, Howard (Journal article; Peer reviewed, 1998)Beaver (Castor spp.) normally scent mark by depositing castoreum and/or anal gland secretion on scent mounds close to the water's edge. The aim of this study was to investigate the hypothesis that the Eurasian beaver (C. ... -
Sex and age composition of spring-hunted Eurasian beaver in Norway
Parker, Howard; Rosell, Frank; Hermansen, Tore André; Sørløkk, Gjermund; Stærk, Martin (Journal article; Peer reviewed, 2002)In Norway, Sweden and Finland most Eurasian beaver (Castor fiber) harvested are shot in April and May. As beaver cannot be sexed or effectively aged under spring hunting conditions, hunters normally shoot the first animal ... -
The Hardangervidda wild reindeer herd: a problematic management history
Bjerketvedt, Dag; Reimers, Eigil; Parker, Howard; Borgstrøm, Reidar (Journal article; Peer reviewed, 2014)The unique and internationally important wild reindeer Rangifer tarandus herd on the Hardangervidda plateau of southern Norway has shown frequent and extreme fluctuations in harvest numbers for the past 60 years, despite ... -
Use of dawn and dusk sight observations to determine colony size and family composition in Eurasian beaver Castor fiber
Rosell, Frank; Parker, Howard; Steifetten, Øyvind (Journal article; Peer reviewed, 2006)The methods used to determine family composition and colony size in Eurasian beaver Castor fiber Linnaeus, 1758 are often poorly described in published reports. Here we show how repeated counts of colony size in a random ... -
Use of linear and areal habitat models to establish and distribute beaver Castor fiber harvest quotas in Norway
Parker, Howard; Steifetten, Øyvind; Uren, Gisle; Rosell, Frank (Journal article; Peer reviewed, 2013)In Norway the Eurasian beaver Castor fiber harvest is quota-regulated. Once the annual quota for each municipality has been determined it is distributed to landowner-organized beaver management units. Municipal wildlife ...