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Journal articles on the topic 'Willow ptarmigan'

Author: Grafiati

Published: 4 June 2021

Last updated: 31 July 2024

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1

Thomas, V. G. "Body condition of willow ptarmigan parasitized by cestodes during winter." Canadian Journal of Zoology 64, no. 1 (1986): 251–54. http://dx.doi.org/10.1139/z86-039.

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Sixty-two adult male willow ptarmigan (Lagopus lagopus) were collected over 3 days in April 1979 from a single flock along the Hudson Bay coast of Ontario. Twenty-one ptarmigan contained cestodes (genus Raillietina) in the anterior of the small intestine and 41 were free of cestodes. Each ptarmigan was dissected into its principal voluntary muscles, liver, and intestinal components, and the entire body was subjected to neutral fat extraction. Parasitized willow ptarmigan had significantly heavier empty small intestinal weights than nonparasitized birds. All other variables pertaining to the fa

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2

Taylor, Peter. "Southerly movements of Willow Ptarmigan during the winter in and near the prairie provinces." Blue Jay 78, no. 4 (2021): 13–23. http://dx.doi.org/10.29173/bluejay6309.

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3

Rodrigue, J., R. McNicoll, D. Leclair, and J. F. Duchesne. "Lead Concentrations in Ruffed Grouse, Rock Ptarmigan, and Willow Ptarmiganin Québec." Archives of Environmental Contamination and Toxicology 49, no. 1 (2005): 97–104. http://dx.doi.org/10.1007/s00244-003-0265-4.

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4

Martin, Kathy. "Herring gulls prey upon female willow ptarmigan." Canadian Journal of Zoology 63, no. 4 (1985): 984–85. http://dx.doi.org/10.1139/z85-146.

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On 12 June 1984 at La Pérouse Bay, Manitoba, Canada, 1 saw three herring gulls attack, kill, and consume an incubating adult hen willow ptarmigan and her clutch despite vigorous defence behaviour by her mate. Possible attacks by gulls or jaegers occurred also on two incubating hens in 1983.

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5

Parker, Howard. "Compensatory Reproduction through Renesting in Willow Ptarmigan." Journal of Wildlife Management 49, no. 3 (1985): 599. http://dx.doi.org/10.2307/3801679.

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6

Xiaochen, Yu, Gao Zhiyuan, and Tian Jialong. "Recent status of Willow ptarmigan in China." Journal of Forestry Research 9, no. 2 (1998): 133–35. http://dx.doi.org/10.1007/bf02865005.

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7

Pedersen, Åshild Ø., Lasse Asmyhr, Hans Christian Pedersen, and Nina E. Eide. "Nest-predator prevalence along a mountain birch - alpine tundra ecotone." Wildlife Research 38, no. 6 (2011): 525. http://dx.doi.org/10.1071/wr11031.

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Context Nest predation is a major factor influencing life history and population dynamics of ground-nesting birds. The transitions between the northern boreal mountain birch forests and the low-alpine tundra are important habitats for the willow ptarmigan, Lagopus lagopus (Linnaeus, 1758). During the past decades, these landscapes have been extensively developed with cabin resorts in southern Norway, which has led to an increased number of roads and foot paths in relatively undisturbed habitats. Aims The aim of the present study was to investigate relative nest-predation rates in elevation gra

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8

Pistone, D., M. Lindgren, P. Holmstad, et al. "The role of chewing lice (Phthiraptera: Philopteridae) as intermediate hosts in the transmission of Hymenolepis microps (Cestoda: Cyclophyllidea) from the willow ptarmigan Lagopus lagopus (Aves: Tetraonidae)." Journal of Helminthology 92, no. 1 (2017): 49–55. http://dx.doi.org/10.1017/s0022149x17000141.

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AbstractThe cestode Hymenolepis microps is an intestinal parasite of tetraonid birds, including the willow ptarmigan (Lagopus lagopus). This parasite is able to maintain a high prevalence and intensity throughout the year, even in a subarctic environment in bird populations with relatively low host densities, indicating effective transmission routes. Willow ptarmigan consume mainly vegetal material and active consumption of invertebrates is confined to the first two or three weeks of life. Ptarmigan are infected by different species of ectoparasites, of which two species of feather lice, Lagop

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9

Steen, Johan B., Hans Chr Pedersen, Kjell Einar Erikstad, Ketil Boye Hansen, Karsten Hoydal, and Asbjorn Stordal. "The Significance of Cock Territories in Willow Ptarmigan." Ornis Scandinavica 16, no. 4 (1985): 277. http://dx.doi.org/10.2307/3676691.

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10

Sandercock, Brett K. "Free-Living Willow Ptarmigan Are Determinate Egg-Layers." Condor 95, no. 3 (1993): 554–58. http://dx.doi.org/10.2307/1369599.

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11

BRØSETH, HENRIK, JARLE TUFTO, HANS CHR PEDERSEN, HARALD STEEN, and LEIF KASTDALEN. "Dispersal patterns in a harvested willow ptarmigan population." Journal of Applied Ecology 42, no. 3 (2005): 453–59. http://dx.doi.org/10.1111/j.1365-2664.2005.01031.x.

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12

Martin, Kathy, and Fred Cooke. "Bi-parental care in willow ptarmigan: a luxury?" Animal Behaviour 35, no. 2 (1987): 369–79. http://dx.doi.org/10.1016/s0003-3472(87)80260-9.

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13

Tarasov, V. V. "Variation of egg size in the willow ptarmigan." Russian Journal of Ecology 42, no. 4 (2011): 347–49. http://dx.doi.org/10.1134/s1067413611040163.

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14

Kvasnes, Mikkel A. J., Hans Chr Pedersen, Håkon Solvang, Torstein Storaas, and Erlend B. Nilsen. "Spatial distribution and settlement strategies in willow ptarmigan." Population Ecology 57, no. 1 (2014): 151–61. http://dx.doi.org/10.1007/s10144-014-0454-1.

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15

Wilson, Scott, Kathy Martin, and Susan J. Hannon. "Nest Survival Patterns in Willow Ptarmigan: Influence of Time, Nesting Stage, and Female Characteristics." Condor 109, no. 2 (2007): 377–88. http://dx.doi.org/10.1093/condor/109.2.377.

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Abstract Nest predation is the most important factor limiting reproductive success of Willow Ptarmigan (Lagopus lagopus), as it is for many bird species. Using program MARK, we examined patterns of daily nest survival in two widely separated populations of Willow Ptarmigan in Manitoba and British Columbia, Canada, by examining variation among years, over the course of the breeding season or in relation to the age of the nest, or age and condition of the female. At La Pérouse Bay, Manitoba, daily nest survival increased linearly throughout the season, with moderate annual variation. Nests also

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16

O'Reilly, Patrick, and Susan J. Hannon. "Predation of simulated willow ptarmigan nests: the influence of density and cover on spatial and temporal patterns of predation." Canadian Journal of Zoology 67, no. 5 (1989): 1263–67. http://dx.doi.org/10.1139/z89-180.

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Predation of eggs is a major loss in production for many populations of grouse, yet often the identity of the predators, their pattern of search, and their impact on spacing of nests is unknown. We set out clutches of quail eggs to simulate willow ptarmigan (Lagopus lagopus) nests at three densities (100/km2, 50/km2, and 27/km2) to (i) investigate the effects of nest density and concealment on predation rates, (ii) investigate the temporal and spatial patterns of predation, (iii) identify nest predators, and (iv) compare predation rates on artificial nests and nests of willow ptarmigan. Predat

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17

Martin, Kathy, and Susan J. Hannon. "Early Pair and Extra-Pair Copulations in Willow Ptarmigan." Condor 90, no. 1 (1988): 245–46. http://dx.doi.org/10.2307/1368457.

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18

MERCER, J. B., and E. SIMON. "Appropriate and inappropriate hypothalamic cold thermosensitivity in Willow Ptarmigan." Acta Physiologica Scandinavica 131, no. 1 (1987): 73–80. http://dx.doi.org/10.1111/j.1748-1716.1987.tb08207.x.

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19

STEEN, J. B., G. W. GABRIELSEN, and J. W. KANWISHER. "Physiological aspects of freezing behaviour in willow ptarmigan hens." Acta Physiologica Scandinavica 134, no. 2 (1988): 299–304. http://dx.doi.org/10.1111/j.1748-1716.1988.tb08493.x.

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20

Hannon, Susan J., and Perri Eason. "Colour bands, combs and coverable badges in willow ptarmigan." Animal Behaviour 49, no. 1 (1995): 53–62. http://dx.doi.org/10.1016/0003-3472(95)80153-7.

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21

Applegate, Roger D. "Extralimital occurrences of Willow Ptarmigan, Lagopus lagopus, in Maine." Canadian field-naturalist 110, no. 4 (1996): 715. http://dx.doi.org/10.5962/p.357559.

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22

Stokkan, Karl-Arne, Peter J. Sharp, Ian C. Dunn, and Robert W. Lea. "Endocrine changes in photostimulated willow ptarmigan (Lagopus lagopus lagopus) and Svalbard ptarmigan (Lagopus mutus hyperboreus)." General and Comparative Endocrinology 70, no. 1 (1988): 169–77. http://dx.doi.org/10.1016/0016-6480(88)90107-4.

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23

Mortensen, Atle, and A. S. Blix. "Seasonal Changes in Resting Metabolic Rate and Mass-Specific Conductance in Svalbard Ptarmigan, Norwegian Rock Ptarmigan and Norwegian Willow Ptarmigan." Ornis Scandinavica 17, no. 1 (1986): 8. http://dx.doi.org/10.2307/3676746.

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24

Myklebust, I., S. Nybø, J. A. Kls, and H. C. Pedersen. "Cadmium accumulation in willow ptarmigan (Lagopus L. lagopus) and rock ptarmigan (L. mutus) in Central Norway." Science of The Total Environment 134 (January 1993): 135–39. http://dx.doi.org/10.1016/s0048-9697(05)80012-9.

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25

Sandercock, Brett K., and Hans Chr Pedersen. "The effect of renesting ability and nesting attempt on egg-size variation in willow ptarmigan." Canadian Journal of Zoology 72, no. 12 (1994): 2252–55. http://dx.doi.org/10.1139/z94-301.

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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 ± 0.1 cm3; mean ± 1 SE) fell within the range reported for other populations of ptarmigan. Most of the egg-size variation (56.0%) was explained by differences among females, but renesting ability and nesting attempt were also important. The age-class of females and timing of nest loss had no effect on egg-size variation. Females that laid replacement clutches produced eggs in their first nesting attempts (n = 12 females, 102 eggs)

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26

Rorvik, Kjell-Arne, Hans Christian Pedersen, and Johan B. Steen. "Genetic Variation and Territoriality in Willow Ptarmigan (Lagopus lagopus lagopus)." Evolution 44, no. 6 (1990): 1490. http://dx.doi.org/10.2307/2409331.

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27

Gabrielsen, Geir Wing, and Sigmund Unander. "Energy costs during incubation in Svalbard and Willow Ptarmigan hens." Polar Research 5, no. 1 (1987): 59–69. http://dx.doi.org/10.3402/polar.v5i1.6869.

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28

Martin, Kathy, and Andrew G. Horn. "Clutch Defense by Male and Female Willow Ptarmigan Lagopus lagopus." Ornis Scandinavica 24, no. 4 (1993): 261. http://dx.doi.org/10.2307/3676788.

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29

Holmstad, Per R., and Arne Skorping. "Covariation of parasite intensities in willow ptarmigan, Lagopus lagopus L." Canadian Journal of Zoology 76, no. 8 (1998): 1581–88. http://dx.doi.org/10.1139/z98-092.

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The distribution of parasites in individual willow ptarmigan (Lagopus lagopus) hosts and associations between parasite numbers were used to investigate whether host susceptibility, in addition to factors associated with exposure, may have influenced the patterns of infection. Eight species of parasites were found, Trichostrongylus tenuis, Capillaria caudinflata, Splendidofilaria papillocerca, Hymenolepis microps, Paroniella urogalli, Leucocytozoon lovati, Eimeria sp., and Trypanosoma sp., in addition to microfilariae. Frequency distributions of all but one of these parasite species were overdi

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30

GABRIELSEN, GEIR WING, and SIGMUND UNANDER. "Energy costs during incubation in Svalbard and Willow Ptarmigan hens." Polar Research 5, no. 1 (1987): 59–69. http://dx.doi.org/10.1111/j.1751-8369.1987.tb00356.x.

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31

Rørvik, Kjell-Arne, Hans Christian Pedersen, and Johan B. Steen. "GENETIC VARIATION AND TERRITORIALITY IN WILLOW PTARMIGAN (LAGOPUS LAGOPUS LAGOPUS )." Evolution 44, no. 6 (1990): 1490–97. http://dx.doi.org/10.1111/j.1558-5646.1990.tb03840.x.

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32

Robb, Leslie A., Kathy Martin, and Susan J. Hannon. "Spring Body Condition, Fecundity and Survival in Female Willow Ptarmigan." Journal of Animal Ecology 61, no. 1 (1992): 215. http://dx.doi.org/10.2307/5524.

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33

Aanes, Sondre, Steinar Engen, Bernt-Erik SÆther, Tomas Willebrand, and Vidar Marcström. "SUSTAINABLE HARVESTING STRATEGIES OF WILLOW PTARMIGAN IN A FLUCTUATING ENVIRONMENT." Ecological Applications 12, no. 1 (2002): 281–90. http://dx.doi.org/10.1890/1051-0761(2002)012[0281:shsowp]2.0.co;2.

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34

Schwab, Francis E., Neal P. P. Simon, and Sherri Nash. "Age and Sex Segregation of Wintering Willow Ptarmigan in Labrador." Northeastern Naturalist 12, no. 1 (2005): 113–18. http://dx.doi.org/10.1656/1092-6194(2005)012[0113:aassow]2.0.co;2.

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35

Kvasnes, Mikkel Andreas Jørnsøn, Hans Christian Pedersen, Torstein Storaas, and Erlend Birkeland Nilsen. "Vegetation type and demography of low density willow ptarmigan populations." Journal of Wildlife Management 81, no. 1 (2016): 174–81. http://dx.doi.org/10.1002/jwmg.21180.

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36

Andersen, Oddgeir, Bjørn Petter Kaltenborn, Joar Vittersø, and Tomas Willebrand. "Preferred harvest principles and - regulations amongst willow ptarmigan hunters in Norway." Wildlife Biology 20, no. 5 (2014): 285–90. http://dx.doi.org/10.2981/wlb.00048.

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37

Rørvik, Kjell-Arne, Hans Christian Pedersen, and Johan B. Steen. "Dispersal in willow ptarmigan Lagopus lagopus - who is dispersing and why?" Wildlife Biology 4, no. 1 (1998): 91–96. http://dx.doi.org/10.2981/wlb.1998.005.

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38

Steen, Johan B., Oivind Andersen, Asgeir Saebo, Hans Chr Pedersen, and Kjell Einar Erikstad. "Viability of Newly Hatched Chicks of Willow Ptarmigan Lagopus l. lagopus." Ornis Scandinavica 19, no. 2 (1988): 93. http://dx.doi.org/10.2307/3676457.

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39

Martin, Kathy, and Cynthia A. Wright. "Estradiol Cypionate (ECP) Markedly Improves Survival of Willow Ptarmigan in Captivity." Condor 95, no. 1 (1993): 211–17. http://dx.doi.org/10.2307/1369401.

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40

RØRVIK, KJELL-ARNE. "Electrophoretic separation of serum esterases in Willow Ptarmigan (Lagopus lagopus lagopus)." Hereditas 107, no. 2 (2008): 191–95. http://dx.doi.org/10.1111/j.1601-5223.1987.tb00284.x.

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41

RØRVIK, KJELL-ARNE, and JOHAN B. STEEN. "The genetic structure of Scandinavian Willow Ptarmigan (Lagopus lagopus lagopus) populations." Hereditas 110, no. 2 (2008): 139–44. http://dx.doi.org/10.1111/j.1601-5223.1989.tb00433.x.

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42

Holmstad, Per R., Knut H. Jensen, and Arne Skorping. "Ectoparasite intensities are correlated with endoparasite infection loads in willow ptarmigan." Oikos 117, no. 4 (2008): 515–20. http://dx.doi.org/10.1111/j.0030-1299.2008.16219.x.

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43

HANNON, SUSAN J., and GLORIA DOBUSH. "Pairing status of male willow ptarmigan: is polygyny costly to males?" Animal Behaviour 53, no. 2 (1997): 369–80. http://dx.doi.org/10.1006/anbe.1996.0328.

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44

Mortensen, Atle, and Arnoldus Schytte Blix. "Seasonal Changes in Energy Intake, Energy Expenditure, and Digestibility in Captive Svalbard Rock Ptarmigan and Norwegian Willow Ptarmigan." Ornis Scandinavica 20, no. 1 (1989): 22. http://dx.doi.org/10.2307/3676703.

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45

Pedersen, Hans Chr, Signe Nybø, and Per Varskog. "Seasonal variation in radiocaesium concentration in willow ptarmigan and rock ptarmigan in central Norway after the chernobyl fallout." Journal of Environmental Radioactivity 41, no. 1 (1998): 65–81. http://dx.doi.org/10.1016/s0265-931x(97)00095-7.

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46

Rodrigue, Jean, Louise Champoux, Daniel Leclair, and Jean-François Duchesne. "Cadmium concentrations in tissues of willow ptarmigan (Lagopus lagopus) and rock ptarmigan (Lagopus muta) in Nunavik, Northern Québec." Environmental Pollution 147, no. 3 (2007): 642–47. http://dx.doi.org/10.1016/j.envpol.2006.10.017.

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47

Martin, Kathy. "Experimental evaluation of age, body size, and experience in determining territory ownership in willow ptarmigan." Canadian Journal of Zoology 69, no. 7 (1991): 1834–41. http://dx.doi.org/10.1139/z91-253.

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During 1981–1984, 18% of resident males in a population of willow ptarmigan at La Perouse Bay, Manitoba, Canada, were unpaired at onset of breeding, whereas all resident females acquired males. Territory ownership and pair bonds were very stable within seasons, with only three territory and mate takeovers by males occurring among 275 pair-years. I present data on origins, age, body size and mass, familiarity with the site, and breeding experience for paired and unpaired males, and on responses of both sexes to vacancies created by the experimental removal of mates. Of 61 paired males (territor

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48

Sveinsdóttir, Máney, and Kristinn Pétur Magnússon. "Complete mitochondrial genome and phylogenetic analysis of willow ptarmigan (Lagopus lagopus) and rock ptarmigan (Lagopus muta) (Galliformes: Phasianidae: Tetraoninae)." Mitochondrial DNA Part B 2, no. 2 (2017): 400–402. http://dx.doi.org/10.1080/23802359.2017.1347834.

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49

Schieck, Jim O., and Susan J. Hannon. "Clutch Predation, Cover, and the Overdispersion of Nests of the Willow Ptarmigan." Ecology 74, no. 3 (1993): 743–50. http://dx.doi.org/10.2307/1940802.

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50

ZIMMERMAN, CHRISTIAN E., NICOLA HILLGRUBER, SEAN E. BURRIL, MICHELLE A. ST. PETERS, and JENNIFER D. WETZEL. "OFFSHORE MARINE OBSERVATION OF WILLOW PTARMIGAN, INCLUDING WATER LANDINGS, KUSKOKWIM BAY, ALASKA." Wilson Bulletin 117, no. 1 (2005): 12–14. http://dx.doi.org/10.1676/04-074.

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