Tag: all of Lagopus

Identifying disease reservoirs in complex systems: mountain hares as reservoirs of ticks and louping-ill virus, pathogens of red grouse

Willow Ptarmigan (Lagopus lagopus) Science Article 8 abstract We examined the role of mountain hares in the louping-ill virus/Ixodes ricinus tick system to determine whether hares were reservoirs of these pathogens for red grouse. A field experiment, which involved reducing mountain hare densities was undertaken and changes in tick abundance, louping-ill virus seroprevalence and red […]

Seasonal infection patterns inWillow Grouse(Lagopus lagopus L.) do not supportthe presence of parasite-induced winter losses

Willow Ptarmigan (Lagopus lagopus) Science Article 4 abstract We examined the hypothesis that endoparasites ofWillow Grouse (Lagopus lagopus L.)affect host winter losses, by examining two samples ofWillow Grouse collected in earlyautumn and late winter. Body condition of juvenile birds improved from September toFebruary, but parasite-induced hostmortalities among hosts in poor conditionwere probablynot the cause. If […]

Can parasites synchronise the population fluctuations of sympatric tetraonids? Examining some minimum conditions

Ptarmigan (Lagopus muta) Science Article 9 abstract Sympatric populations of tetraonid birds tend to fluctuate in synchrony, at least onlocal scales. If shared parasites among sympatric populations of different tetraonidspecies are to operate as a local, synchronizing factor for population fluctuations atleast two conditions should be met Per R. Holmstad, Peter J. Hudson, Vigdis Vandvik […]

Leucocytozoon lovati Infections in Wild Rock Ptarmigan(Lagopus mutus) in Japan

Ptarmigan (Lagopus muta) Science Article 5 abstract Leucocytozoon lovati infections were detected in free-flying rock ptarmigan (Lagopus mutus), an endangered species that inhabits alpine areas in Japan. Eight of nine adult birds tested positive for L. lovati infection. For comparison, two captive rock ptarmiganshatched in a breeding facility at the foot of the mountains were […]

Evidence for cryptic northern refugiaamong high- and temperate-latitude species in Beringia

Ptarmigan (Lagopus muta) Science Article 8 abstract Stewart and Dalen (2008) argue that only temperate species were locked incryptic northern refugia during Pleistocene glacial cycles, while species presently found athigh latitudes had much wider distributions during glaciations. Christin L. Pruett & Kevin Winker, Climatic Change, 2007 Download article download full text (pdf)

Vegetation analysis of the territorial boundary between red grouse (lagopus scoticus) and ptarmigan (Lagopus mutus)

Ptarmigan (Lagopus muta) Science Article 2 abstract The location of the boundary between the territories of red grouse (Lagopus lagopus scoticus) and ptarmigan (Lagopus mutus) is related to the vegetation of the hills where both these species occur. If the he vegetation is dominated by tall, vigorous Calluna vulgaris, grouse occur. At greater altitudes where […]

Geographic variation in body mass of rock ptarmigan Lagopus mutus in the Alps and the Pyrenees

Ptarmigan (Lagopus muta) Science Article 4 abstract We compared the body mass of adult rock ptarmigan Lagopus mutus shot in autumn in the French Pyrenees (Ariege), the French Alps (Hautes-Alpes) and the Italian Alps (Province of Verbania). Mean body mass of adults was greater in the Ariege than in the Hautes-Alpes both for cocks (466 […]

Historical Biogeography and a Mitochondrial DNA Phylogeny of Grouse and Ptarmigan

Ptarmigan (Lagopus muta) Science Article 3 abstract We sequenced 2690 nucleotides of mitochondrial DNA (mtDNA) including the entire control region (CR), partial 12S and 16S ribosomal RNAs, NADH dehydrogenase subunit 2, and cytochrome b genes from representatives of all the 17 living species of grouse and ptarmigan (Aves; Galliformes; subfamily Tetraonin ). Substitution rates and […]

The Reproductive Biology of Rock Ptarmigan (Lagopus mutus) in the Central Canadian Arctic

Ptarmigan (Lagopus muta) Science Article 1 abstract This paper reports on the nesting phenology, breeding biology, and attrition rates at different stages of the breeding cycle of a population of rock ptarmigan (Lagopus mutus) at Windy Lake, Northwest Territories, from 1987 to 1989. By early May, males were on the study area, mostly in flocks […]