scholarly journals Pulmonary Phycomycosis in Captive Rock Ptarmigan (Lagopus Mutus) and Willow Ptarmigan (Lagopus Lagopus) Chicks

1975 ◽  
Vol 16 (1) ◽  
pp. 134-136
Author(s):  
Ingolf Hanssen
Keyword(s):  
Rock Ptarmigan ◽  
Willow Ptarmigan ◽  
Lagopus Lagopus ◽  
Lagopus Mutus

Cadmium concentrations in tissues of willow ptarmigan (Lagopus lagopus) and rock ptarmigan (Lagopus muta) in Nunavik, Northern Québec

2007 ◽  
Vol 147 (3) ◽  
pp. 642-647 ◽  
Author(s):  
Jean Rodrigue ◽  
Louise Champoux ◽  
Daniel Leclair ◽  
Jean-François Duchesne
Keyword(s):  
Rock Ptarmigan ◽  
Willow Ptarmigan ◽  
Lagopus Lagopus ◽  
Lagopus Muta

Winter diet and intestinal proportions of rock and willow ptarmigan and sharp-tailed grouse in Ontario

1984 ◽  
Vol 62 (11) ◽  
pp. 2258-2263 ◽  
Author(s):  
V. G. Thomas
Keyword(s):  
Body Weight ◽  
Digestive Organ ◽  
Rock Ptarmigan ◽  
Willow Ptarmigan ◽  
Northern Ontario ◽  
Winter Diet ◽  
Lagopus Mutus ◽  
Dwarf Birch ◽  
Individual Body ◽  
Salix Spp

Dwarf birch (Betula glandulosa) and willow (Salix spp.) were the principal winter foods of sympatric willow ptarmigan (Lagopus lagopus), rock ptarmigan (Lagopus mutus), and sharp-tailed grouse (Tympanuchus phasianellus) in northern Ontario. Birch catkins and leaf buds made up 90 and 69% of the diet of sharp-tailed grouse and rock ptarmigan, respectively, whereas willow stems and buds formed 68% of the willow ptarmigan diet. Digestive organ weights differed significantly (P < 0.05) among the species of grouse during winter. Within each species, weights of gizzard, caeca, and small intestine were weakly correlated with individual body weight. Total variance in the weight of each digestive organ among species was partitioned into significant effects of species body weight and also species. Seasonal changes to lighter caeca and small intestines were apparent in prebreeding willow ptarmigan and rock ptarmigan coincident with a change in diet to green, growing willow and birch parts. A precise effect of type of diet upon the digestive organ weight of different grouse species was not perceived and was confounded by influences of species body weight.

Relative Heart Size in Alaskan Tetraonidae

The Auk ◽  
1979 ◽  
Vol 96 (2) ◽  
pp. 306-318
Author(s):  
Robert B. Weeden
Keyword(s):  
Body Weight ◽  
Body Size ◽  
The Other ◽  
Rock Ptarmigan ◽  
Bonasa Umbellus ◽  
Willow Ptarmigan ◽  
Intraspecific Variations ◽  
Lagopus Mutus ◽  
Dendragapus Obscurus ◽  
Heart Size

Abstract Heart:body size ratios were measured in over 1,900 specimens of seven species of Alaskan Tetraonidae. Blue Grouse (Dendragapus obscurus) and Ruffed Grouse (Bonasa umbellus) have hearts averaging only 0.4 to 0.5% of body weight. At the other extreme, Rock Ptarmigan (Lagopus mutus) have hearts averaging 2.0% of body weight. Between these extremes are White-tailed Ptarmigan (L. leucurus), 1.1%; Spruce Grouse (Canachites canadensis), 1.2%; Sharp-tailed Grouse (Pedioecetes phasianellus), 1.4%; and Willow Ptarmigan (L. lagopus), 1.4%. Intraspecific variations related to sex, age, body size, season, and locality were found in some but not all species. The members of this family seem to have evolved diverse strategies for meeting cardiovascular requirements, and heart size alone does not reveal the nature of these systems.

Willow Ptarmigan (Lagopus lagopus)

1998 ◽  
Author(s):  
S. J. Hannon ◽  
P. K. Eason ◽  
K. Martin
Keyword(s):  
Willow Ptarmigan ◽  
Lagopus Lagopus

scholarly journals Fowlpox Virus Infection in a Captive Japanese Rock Ptarmigan (Lagopus mutus japonicus)

2007 ◽  
Vol 12 (1) ◽  
pp. 77-80 ◽  
Author(s):  
Mi Htay Htay Yu ◽  
Tsuyoshi YAMAGUCHI ◽  
Norio MIYANO ◽  
Hirofumi SHIMIZU ◽  
Atsuko MURAI ◽  
...  
Keyword(s):  
Virus Infection ◽  
Rock Ptarmigan ◽  
Fowlpox Virus ◽  
Lagopus Mutus
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