Results 51 to 60 of about 1,072 (165)

Range selection by semi-domesticated reindeer (Rangifer tarandus tarandus) in relation to infrastructure and human activity in the boreal forest environment, northern Finland [PDF]

open access: yes, 2011
During past decades, the amounts of infrastructure and human activity have increased in northern latitudes. Although the effects of human development on wild reindeer and caribou have been widely examined, its effects on semidomesticated reindeer and the
Anttonen, Marja   +2 more
core   +2 more sources

Kelp and seaweed feeding by High-Arctic wild reindeer under extreme winter conditions [PDF]

open access: yesPolar Research, 2012
One challenge in current Arctic ecological research is to understand and predict how wildlife may respond to increased frequencies of “extreme” weather events.
Brage Bremset Hansen, Ronny Aanes
doaj   +1 more source

Arctic reindeer extend their visual range into the ultraviolet [PDF]

open access: yes, 2011
The Arctic has extreme seasonal changes in light levels and is proportionally UV-rich because of scattering of the shorter wavelengths and their reflection from snow and ice.
Cottrill, P   +7 more
core   +2 more sources

Seasonal changes in the ruminal microflora of the high-arctic Svalbard reindeer (Rangifer tarandus platyrhynchus). [PDF]

open access: yesAppl Environ Microbiol, 1985
The dominant rumen bacteria in high-arctic Svalbard reindeer were characterized, their population densities were estimated, and ruminal pH was determined in summer, when food quality and availability are good, and in winter, when they are poor. In summer the total cultured viable population density was (2.09 +/- 1.26) X 10(10) cells ml-1, whereas in ...
Orpin CG   +3 more
europepmc   +4 more sources

‘You shall not pass!’: quantifying barrier permeability and proximity avoidance by animals [PDF]

open access: yes, 2015
1. Impediments to animal movement are ubiquitous and vary widely in both scale and permeability. It is essential to understand how impediments alter ecological dynamics via their influence on animal behavioural strategies governing space use and, for ...
Basille, Mathieu   +9 more
core   +1 more source

The introduction of reindeer to Brøggerhalvøya, Svalbard: grazing preference and effect on vegetation

open access: yesRangifer, 1993
In 1978 after about 100 years of absence, 15 Svalbard reindeer, Rangifer tarandus platyrhynchus were reintroduced to Brøggerhalvøya, a peninsula on the north-western coast of Svalbard. This stock had increased to about 200 animals in 1989.
H. Staaland   +5 more
doaj   +1 more source

Assessing the efficacy of medetomidine and tiletamine-zolazepam for remote immobilisation of feral horses (Equus caballus) [PDF]

open access: yes, 2014
Context The study of any wild animal's home range requires the collection of spatiotemporal data, obtained independently of climatic conditions or time of day. This can be achieved by the attachment of global positioning system (GPS) data loggers, which,
Berman, David M.   +4 more
core   +2 more sources

Haematological and biochemical parameters in Churra-da-Terra-Quente ewes from the northeast of Portugal [PDF]

open access: yes, 2010
Hematological and biochemical parameters, including plasma electrolytes and thyroid hormones, were determined in 73 clinically healthy Churra-da-Terra-Quente ewes, a typical breed from the northeast of Portugal. The hemogram values were: erythrocytes 9.8±
A.M. Silva   +34 more
core   +3 more sources

Reversible Immobilization of Free-ranging Svalbard Reindeer (Rangifer tarandus platyrhynchus) with Medetomidine-Ketamine and Atipamezole [PDF]

open access: yesJournal of Wildlife Diseases, 2009
Twenty adult, free-ranging, female Svalbard reindeer (Rangifer tarandus platyrhynchus) were immobilized with medetomidine-ketamine from 30 September through 9 October 1999 at Svalbard, Norway (78 degrees 55'N, 11 degrees 56'E). The animals were approached on foot, and the drugs were administered into the heavy muscles of the shoulder or the thigh by ...
Jon M, Arnemo, Ronny, Aanes
openaire   +2 more sources

Evaluation of ultrasound scanning as a method for measuring subcutaneous fat in Svalbard reindeer

open access: yesRangifer, 2003
The fitness of an animal is generally strongly dependent on its body condition. A reliable measure of body condition is therefore valuable in ecological studies.
Audun Stien   +3 more
doaj   +1 more source

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