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Polar Research Volume 3, 1985 - Issue 2
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Original Articles

Seasonal changes in crop content of the Svalbard ptarmigan Lagopus mutus hyperboreus

Sigmund UnanderNorsk Polarinstitutt, Rolfstangveien 12, 1330 Oslo Lufthavn, Norway;
,
Atle MortensenDepartment of Arctic Biology and Institute of Medical Biology, University of Tramsø, N-9001 Tramsø, Norway;
&
Arve ElvebakkInstitute of Biology and Geology, University of Trornsø, N-9001 Tromsø, Norway; February 1985 (revised May 1985).
Pages 239-245 | Published online: 16 Dec 2016

References

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  • Mortensen, A., Unander, S., Kolstad, M. & Blix, A. S. 1983 Seasonal changes in body composition and crop content of Spitzbergen ptarmigan Lagopus mutus hyperboreus. Ornis Scand. 14, 144–148
  • Mortensen, A. & Blix, A. S. 1985: Seasonal changes in energy intake, energy expenditure and digestibility in Svalbard ptarmigan, and Norwegian willow ptarmigan. Ornis Scand. In press.
  • Moss, R., Gardarsson, A., Olafsson, G. & Brown D. 1974: The in vitro digestibility of ptarmigan Lagopus mutus foods in relation to their chemical composition. Ornis Scand. 5,5–11.
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  • Spidsø, T. K. 1980: Food selection by willow grouse Lagopus lagopus chicks in northern Norway. Ornis Scand. 11, 99-105. Staaland, H., Brattbakk, I., Ekern, K. & Kildemo, K. 1983: Chemical composition of reindeer forage plants in Svalbard and Norway. Holarctic ecology 6, 109–122.
  • Steen, J. B. & Unander, S. 1985: Breeding biology of the Svalbard Rock Ptarmigan (Lagopus mutus hyperboreus). Ornis Scand. In press.
  • Weeden, R. B. 1969: Foods of rock and willow ptarmigan in central Alaska with comments on interspecific competition. Auk. 86, 271–281.

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