Age-specific patterns of reproduction in White-tailed and Willow Ptarmigan Lagopus leucurus and L. lagopus

Ibis ◽  
2008 ◽  
Vol 140 (1) ◽  
pp. 14-24 ◽  
Author(s):  
KAREN L. WIEBE ◽  
KATHY MARTIN
Keyword(s):  
Willow Ptarmigan ◽  
Lagopus Leucurus

Hormonal Induction of Feather Pigmentation in Ptarmigan

The Auk ◽  
1980 ◽  
Vol 97 (3) ◽  
pp. 601-607 ◽  
Author(s):  
E. O. Höhn ◽  
C. E. Braun
Keyword(s):  
Control Mechanism ◽  
Posterior Pituitary ◽  
Pituitary Extract ◽  
Natural Control ◽  
Willow Ptarmigan ◽  
Lagopus Lagopus ◽  
Lagopus Leucurus ◽  
Hormonal Induction

Abstract Willow Ptarmigan (Lagopus lagopus) in the winter plumage, on a regime under which control birds grew white feathers in plucked areas, grew pigmented feathers in the plucked areas, when injected with posterior pituitary extract or α MSH, LH, or FSH (only effective in females). White-tailed Ptarmigan (Lagopus leucurus), patch-plucked and released into the wild after implantation with a hormone-cholesterol mixture, grew pigmented feathers after implantation with α MSH, TSH, thyroxine (in one out of two birds tested), and an FSH/LH mixture. Controls implanted with cholesterol grew only white feathers. Both sets of experiments were carried out in winter. A scheme of the control of ptarmigan plumage colors, which assumes that MSH and gonadotrophins and, in males, testosterone are involved in the natural control mechanism, is proposed.

Willow Ptarmigan (Lagopus lagopus)

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

scholarly journals Parental Nutrition and Chick Production in Captive Willow Ptarmigan (Lagopus L. Lagopus)

1982 ◽  
Vol 23 (4) ◽  
pp. 528-538 ◽  
Author(s):  
I. Hanssen ◽  
J. Ness ◽  
J. B. Steen
Keyword(s):  
Willow Ptarmigan ◽  
Parental Nutrition

Dispersal patterns in a harvested willow ptarmigan population

2005 ◽  
Vol 42 (3) ◽  
pp. 453-459 ◽  
Author(s):  
HENRIK BRØSETH ◽  
JARLE TUFTO ◽  
HANS CHR. PEDERSEN ◽  
HARALD STEEN ◽  
LEIF KASTDALEN
Keyword(s):  
Dispersal Patterns ◽  
Willow Ptarmigan

Estradiol Cypionate (ECP) Markedly Improves Survival of Willow Ptarmigan in Captivity

The Condor ◽  
1993 ◽  
Vol 95 (1) ◽  
pp. 211-217
Author(s):  
Kathy Martin ◽  
Cynthia A. Wright
Keyword(s):  
Willow Ptarmigan ◽  
In Captivity

Winter Feeding Program of Alaska Willow Ptarmigan Shown by Crop Contents

The Condor ◽  
1967 ◽  
Vol 69 (1) ◽  
pp. 69-77 ◽  
Author(s):  
Laurence Irving ◽  
George C. West ◽  
Leonard J. Peyton
Keyword(s):  
Willow Ptarmigan ◽  
Feeding Program ◽  
Winter Feeding
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