Výsledky vyhledávání - "Pigmentation/physiology"

Sex- and melanin-specific variations in the oxidative status of tawny owls in response to manipulated reproductive effort

Autor: Isabelle Henry, Pierre Bize, Esther Gonzalez, Alexandre Roulin, Guillaume Emaresi

Publikováno v: Journal of Experimental Biology
The Journal of experimental biology, vol. 219, no. Pt 1, pp. 73-79

Oxidative stress, determined by the balance between the production of damaging reactive oxygen species (ROS) and antioxidant defences, is hypothesised to play an important role in shaping the cost of reproduction and life history trade-offs. To test

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::faee18a0314c80020c06aabff3a76514

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Elektronická kniha

Dermatoscopy of Non-Pigmented Skin Tumors : Pink - Think - Blink

Autor: Iris Zalaudek, Giuseppe Argenziano, Jason Giacomel

Although many skin lesions are pigmented, Dermatoscopy of Non-pigmented Skin Tumors: Pink - Think - Blink addresses non-pigmented lesions, which may be more difficult to diagnose. It discusses dermatoscopy not only as a reliable tool for diagnosis, b

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Coloration signals the ability to cope with elevated stress hormones: effects of corticosterone on growth of barn owls are associated with melanism

Autor: Almasi, B., Roulin, A., Korner-Nievergelt, F., Jenni-Eiermann, S., Jenni, L.

Publikováno v: Journal of Evolutionary Biology
Journal of Evolutionary Biology, vol. 25, no. 6, pp. 1189-1199

Stressful situations during development can shape the phenotype for life by provoking a trade-off between development and survival. Stress hormones, mainly glucocorticoids, play an important orchestrating role in this trade-off. Hence, how stress sen

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Viability of brown trout embryos positively linked to melanin-based but negatively to carotenoid-based colours of their fathers

Autor: Sébastien Nusslé, Claus Wedekind, Alain Jacob, Rudolf Müller, Guillaume Evanno

Publikováno v: Proceedings of the Royal Society B: Biological Sciences
Proceedings of the Royal Society B: Biological Sciences, Royal Society, The, 2008, 275 (1644), pp.1737-1744. ⟨10.1098/rspb.2008.0072⟩
Proceedings of the Royal Society B Biological Sciences, vol. 275, no. 1644, pp. 1737-1744

‘Good-genes’ models of sexual selection predict significant additive genetic variation for fitness-correlated traits within populations to be revealed by phenotypic traits. To test this prediction, we sampled brown trout (Salmo trutta) from their

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e3ee1af47c4cd36fa75010cf20f694f5
https://doi.org/10.1098/rspb.2008.0072

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Condition-dependent expression of melanin-based coloration in the Eurasian kestrel

Autor: Valentijn van den Brink, Romain Piault, Alexandre Roulin

Publikováno v: Naturwissenschaften, vol. 99, no. 5, pp. 391-396
Naturwissenschaften, 99(5), 391-396. Springer Verlag

Melanin is the most common pigment in animal integuments and is responsible for some of the most striking ornaments. A central tenet of sexual selection theory states that melanin-based traits can signal absolute individual quality in any environment

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9cec83e3cfe917e88598f4dac170b467
https://pubmed.ncbi.nlm.nih.gov/22528024

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Dissecting carotenoid from structural components of carotenoid-based coloration: a field experiment with great tits (Parus major)

Autor: Heinz Richner, Cristina Romero-Diaz, Barbara Tschirren, Alain Jacot, Patrick S. Fitze

Publikováno v: American Naturalist, vol. 176, no. 1, pp. 55-62
Digital.CSIC. Repositorio Institucional del CSIC
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8 páginas, 4 figuras, 1 tabla.
Carotenoid‐based yellowish to red plumage colors are widespread visual signals used in sexual and social communication. To understand their ultimate signaling functions, it is important to identify the proximate

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d502e34443c3f93a58181c0c98bcc851
https://serval.unil.ch/resource/serval:BIB_0E6C3F1B5794.P001/REF.pdf

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Phagocytosis of rod outer segments by human iris pigment epithelial cells in vitro

Autor: Ulrich Schraermeyer, Klaus Heimann, Karl Ulrich Bartz-Schmidt, Gabriele Thumann

Publikováno v: Graefe's Archive for Clinical and Experimental Ophthalmology, Vol. 236, No 10 (1998) pp. 753-757

· Background: We set out to evaluate the growth potential of human iris pigment epithelial (hIPE) cells in vitro, to establish whether these cells acquire the ability to phagocytose rod outer sgments (ROS) and to compare the phagocytic activity of h

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https://pubmed.ncbi.nlm.nih.gov/9801890

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Evolution: Social Selection for Eccentricity

Autor: Michel Chapuisat

Publikováno v: Current Biology, vol. 14, no. 23, pp. R1003-R1004

The dress code of paper wasps, like that of humans, is related to their social habits: species with a flexible nest-founding strategy have highly variable black-and-yellow markings. This color polymorphism facilitates individual recognition and might

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