Vegetation type and demography of low density willow ptarmigan populations
نویسندگان
چکیده
منابع مشابه
Free-living Willow Ptarmigan Are Determinate Egg-layers
Egg-laying behavior of free-living Willow Ptarmigan (Lagopus lagopus) was studied at Chilkat Pass, B.C. to learn if females were indeterminate egg-layers in natural conditions. Eggs were removed from clutches of experimental birds during laying, usually beginning with the third egg. All birds were determinate egg-layers and there was no difference in the number of eggs laid by control (K = 8.11...
متن کاملthe investigation of the relationship between type a and type b personalities and quality of translation
چکیده ندارد.
The effect of renesting ability and nesting attempt on egg-size variation in willow ptarmigan
SANDERCOCK, B.K., and PEDERSEN, H.C. 1994. The effect of renesting ability and nesting attempt on egg-size variation in willow ptarmigan. Can. J. Zool . 72: 2252 2255. Interclutch variation in the size of free-living willow ptarmigan (Lagopus lagopus alexandrae) eggs was examined at Chilkat Pass, British Columbia. Egg volume (19.9 f 0.1 cm3; mean f 1 SE) fell within the range reported for other...
متن کاملThe effect of manipulated brood size on parental defence in a precocial bird, the Willow Ptarmigan
Offspring number was manipulated in Willow Ptarmigan Lrzgopus lagopus to determine the effect of brood size on parental effort in defence of young. Three chicks were added (n = 8), exchanged (n = 10) or removed (n = 12) among broods of females that had laid 7-9 eggs. If parents based effort on the value of the brood, it was predicted that defence should increase with offspring number because pt...
متن کاملDemography of a Reintroduced Population of Evermann’s Rock Ptarmigan in the Aleutian Islands
—We report results of a 4-year translocation effort to reestablish a breeding population of Evermann’s Rock Ptarmigan (Lagopus muta evermanni) in the Near Islands group of the western Aleutian Archipelago. Habitat restoration was completed by eradication of introduced foxes from Agattu Island by 1979. We captured and moved 75 ptarmigan from Attu Island to Agattu Island during 2003–2006, and mon...
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ژورنال
عنوان ژورنال: The Journal of Wildlife Management
سال: 2016
ISSN: 0022-541X
DOI: 10.1002/jwmg.21180