Results 241 to 250 of about 446,034 (255)
Some of the next articles are maybe not open access.
Ethology Ecology & Evolution, 2015
Plumage coloration deriving from carotenoid and melanin pigments can be a quality signal in birds, and can be under conspecific inspection in social interactions. For example, parasite load and immune system status can be inferred through plumage color intensity, and can influence the choice of sexual partners.
R.I. Dias +4 more
openaire +1 more source
Plumage coloration deriving from carotenoid and melanin pigments can be a quality signal in birds, and can be under conspecific inspection in social interactions. For example, parasite load and immune system status can be inferred through plumage color intensity, and can influence the choice of sexual partners.
R.I. Dias +4 more
openaire +1 more source
Journal of Endocrinology, 1970
SUMMARY This report presents direct evidence for steroidogenesis by chondrostean tissue. The enzymes necessary for steroid transformation and cleavage of the cholesterol sidechain are present in yellow bodies isolated from the kidneys and along the posterior cardinal veins of the Atlantic sturgeon, Acipenser oxyrhynchus Mitchill.
D R, Idler, G B, Sangalang
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SUMMARY This report presents direct evidence for steroidogenesis by chondrostean tissue. The enzymes necessary for steroid transformation and cleavage of the cholesterol sidechain are present in yellow bodies isolated from the kidneys and along the posterior cardinal veins of the Atlantic sturgeon, Acipenser oxyrhynchus Mitchill.
D R, Idler, G B, Sangalang
openaire +2 more sources
2005
We compared the responsiveness of the LGN and the early retinotopic cortical areas to stimulation of the two cone-opponent systems (red - green and blue - yellow) and the achromatic system. This was done at two contrast levels to control for any effect of contrast. MR images were acquired on seven subjects with a 4T Bruker MedSpec scanner.
Mullen, K. T. +5 more
openaire +1 more source
We compared the responsiveness of the LGN and the early retinotopic cortical areas to stimulation of the two cone-opponent systems (red - green and blue - yellow) and the achromatic system. This was done at two contrast levels to control for any effect of contrast. MR images were acquired on seven subjects with a 4T Bruker MedSpec scanner.
Mullen, K. T. +5 more
openaire +1 more source
Yellow Cardinal (Gubernatrix cristata) males respond more strongly to local than to foreign dialects
Ibis, 2023Marisol Dominguez +2 more
exaly
Family group structure of the endangered Yellow Cardinal ( Gubernatrix cristata )
Avian Biology Research, 2023Maria Soledad Liébana +2 more
exaly
Suppliers selection in the presence of both cardinal and ordinal data
European Journal of Operational Research, 2007Reza Farzipoor Saen
exaly