Zobrazeno 1 - 10
of 1 070
pro vyhledávání: '"Spinus tristis"'
Publikováno v:
Physiological and Biochemical Zoology: Ecological and Evolutionary Approaches, 2013 Jul 01. 86(4), 421-431.
Externí odkaz:
https://www.jstor.org/stable/10.1086/671447
Publikováno v:
Physiological and Biochemical Zoology: Ecological and Evolutionary Approaches, 2012 Jul 01. 85(4), 348-363.
Externí odkaz:
https://www.jstor.org/stable/10.1086/666059
Autor:
W. Herbert Wilson, Paul J. Dougherty
Publikováno v:
The Open Ornithology Journal. 11:1-26
Background:Many bird species that breed at high latitudes exhibit irregular southward incursions in response to spatial and temporal variation in winter food availability.Methods:We analyzed Christmas Bird Count records to compare the migratory behav
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::18c370522c561c4295c419451349fbba
https://doi.org/10.2174/1874453201811010001
https://doi.org/10.2174/1874453201811010001
Publikováno v:
Canadian Journal of Zoology. Feb2012, Vol. 90 Issue 2, p203-209. 7p.
Akademický článek
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Autor:
Grinnell, Joseph
Publikováno v:
The Auk, 1897 Oct 01. 14(4), 397-399.
Externí odkaz:
https://www.jstor.org/stable/4068475
Autor:
Bolen, Donella S.
Females can vary in their mate choice decisions and this variability can play a key role in evolution by sexual selection. Variability in female preferences can affect the intensity and direction of selection on male sexual traits, as well as explain
Publikováno v:
Current Zoology, Vol 59, Iss 4, Pp 439-448 (2013)
Studies of metabolic variation in birds have involved both wild and captive individuals, but few studies have investigated whether captivity directly influences metabolic rates, despite such variation potentially confounding conclusions regarding how
Externí odkaz:
https://doaj.org/article/5c8581aeb4444c85a15102edce617e6b
Publikováno v:
The Birds of North America Online.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a2fa6a87684bdf4c98700f38163f3a84
https://doi.org/10.2173/bna.amegfi.02.1
https://doi.org/10.2173/bna.amegfi.02.1
Publikováno v:
Canadian Journal of Zoology. 90:203-209
Numerous field studies indicate that food supplementation of birds can advance laying date. In addition, laboratory studies, though less common, suggest that altering the amount of food, the predictability of food, or food type can affect reproductiv
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::8634a7d5fb7cb4458d436a2392a1302c
https://doi.org/10.1139/z11-127
https://doi.org/10.1139/z11-127