Free-living Willow Ptarmigan Are Determinate Egg-layers
نویسنده
چکیده
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 eggs, n = 19) and experimental (K = 8.00 eggs, n = 20) females. Number of eggs did not cue the cessation of laying because females started incubation with 2-3 eggs left in the nest.
منابع مشابه
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...
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