Lecture_13-3 - Enzymes to metabolize pigments in integument...

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Tissues that accumulate carotenoids include: Adipose Testes and semen Retina Liver Integument NOT BRAIN! Carotenoids are not always deposited in the form they are ingested. Can be metabolized at the level of the feather into different forms. Sometimes metabolized into different form of the same color. Sometimes metabolized into a different color. Carotenoid coloration varies in area. It is unclear what controls which feather take up carotenoids and which don’t. To get successful carotenoid based color, birds need: Access to/uptake of dietary pigments Ability to absorb/digest pigments Lipoproteins to carry pigments
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Unformatted text preview: Enzymes to metabolize pigments in integument Feathers that can take up the pigment Things that affect these processes: 1. Carotenoid access Foraging ability 2. Overall nutritional condition 3. Genetics 4. Maternal Effects 5. Parasites Carotenoids also have other functions: Immunoenhancers Antioxidants Carotenoids can be honest signals of quality: Foraging ability Nutritional condition/health Genetic superiority Parasite resistance Oxidative stability Other two color pigment types: Porphyrins brown color of owls Psittacofulvin yellow and reds in parrots...
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This note was uploaded on 04/08/2011 for the course POUL 3123 taught by Professor Navara during the Spring '09 term at University of Georgia Athens.

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Lecture_13-3 - Enzymes to metabolize pigments in integument...

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