Female foraging and male vigilance in white-tailed ptarmigan ( Lagopus leucurus ): opportunism or behavioural coordination?

1999 ◽  
Vol 46 (6) ◽  
pp. 429-434 ◽  
Author(s):  
Thomas Artiss ◽  
Wesley M. Hochachka ◽  
Kathy Martin
Keyword(s):  
Lagopus Leucurus

scholarly journals Notes on Lagopus Leucurus

The Auk ◽  
1884 ◽  
Vol 1 (4) ◽  
pp. 392-393
Author(s):  
Frank M. Drew
Keyword(s):  
Lagopus Leucurus

Doubly labelled water measurements of field metabolic rate in White-tailed Ptarmigan: variation in background isotope abundances and effect on CO2 production estimates

1994 ◽  
Vol 72 (11) ◽  
pp. 1967-1972 ◽  
Author(s):  
Donald W. Thomas ◽  
Kathy Martin ◽  
Hélène Lapierre
Keyword(s):  
Metabolic Rate ◽  
Ambient Temperature ◽  
Body Mass ◽  
Empirical Model ◽  
Rocky Mountains ◽  
Co2 Production ◽  
Doubly Labelled Water ◽  
Field Metabolic Rate ◽  
Lagopus Leucurus ◽  
Colorado Rocky Mountains

We measured background 2H and 18O abundances and field metabolic rate (FMR) for White-tailed Ptarmigan (Lagopus leucurus) above 3600 m elevation in the Colorado Rocky Mountains between May and July. 18O abundances ranged from 1982.4 to 2018.6 ppm [Formula: see text], while 2H abundance ranged from 142.8 to 154.0 ppm [Formula: see text]. Mean 2H abundance followed closely (−0.3 ppm deviation) the level predicted by Tatner's empirical model relating 2H and ambient temperature. However, 18O was more enriched than predicted (+3.4 ppm), which may reflect 18O fractionation in the plant diet. FMR, measured by means of the doubly labelled water method, ranged from 206.4 to 442.7 kJ/d and was not related to body mass. However, for males, FMR was significantly and positively related to age. Because of high variation in background isotope levels, the use of mean 2H and 18O background abundances instead of individual backgrounds would introduce a mean error of 7.1% (range −8.9 to +11.4%) in calculations of CO2 production and FMR.

scholarly journals Note on Lagopus Leucurus and Leucosticte Australis

The Auk ◽  
1905 ◽  
Vol 22 (3) ◽  
pp. 315-316 ◽  
Author(s):  
H. W. Henshaw
Keyword(s):  
Lagopus Leucurus

Rhabdometra alpinensis n.sp. (Cestoda: Paruterinidae: Dilepididea) from southern white-tailed ptarmigan (Lagopus leucurus altipetens Osgood) in Colorado, U.S.A., with a key to the species of Rhabdometra Cholodkowsky, 1906

1978 ◽  
Vol 56 (3) ◽  
pp. 446-450 ◽  
Author(s):  
O. Wilford Olsen ◽  
Arthur G. Haskins ◽  
Clait E. Braun
Keyword(s):  
Genital Pore ◽  
The Other ◽  
Lateral Margin ◽  
Lagopus Leucurus

Rhabdometra alpinensis n.sp. is described from white-tailed ptarmigan (Lagopus leucurus altipetens) from Colorado. A key to the known species of Rhabdometra is included. Rhabdometra terricoli Sharma, 1947 is transferred to Anonchotaenia Cohn, 1900. Rhabdometra alpinensis, R. nullicollis, and R. tomica are similar in having the genital pore anterior to the middle of the lateral margin of the proglottid and the testes arranged in one group on each side of the ovary. There are 30–49, 60, and 12–30 testes, respectively. In R. alpinensis, the cirrus pouch is nearly equal in diameter throughout its length, whereas in the other two species, it is narrow distally and broad proximally.

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