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Serum Antioxidant Levels in Wild Birds Vary in Relation to Diet, Season, Life History Strategy, and Species

Micronutrient antioxidants are thought to be generally important for health in many animals, but factors determining levels in individuals and species are not well understood. Diet and season are obvious environmental variables that might predict the degree to which species can accumulate such nutri... Full description

Journal Title: Oecologia 2009, Vol.161 (4), p.673-683
Main Author: Cohen, Alan A
Other Authors: McGraw, Kevin J , Robinson, W. Douglas
Format: Electronic Article Electronic Article
Language: English
Subjects:
Publisher: Berlin/Heidelberg: Springer
ID: ISSN: 0029-8549
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recordid: cdi_proquest_miscellaneous_902347869
title: Serum Antioxidant Levels in Wild Birds Vary in Relation to Diet, Season, Life History Strategy, and Species
format: Article
creator:
  • Cohen, Alan A
  • McGraw, Kevin J
  • Robinson, W. Douglas
subjects:
  • Adaptation, Physiological
  • Animal and plant ecology
  • Animal, plant and microbial ecology
  • Animals
  • Animals, Wild
  • Antioxidants
  • Antioxidants - analysis
  • Antioxidants - metabolism
  • Aves
  • beta -Carotene
  • Biological and medical sciences
  • Biomedical and Life Sciences
  • Birds - blood
  • Birds - classification
  • Birds - physiology
  • Breeding
  • Carotenoids
  • Carotenoids - blood
  • Chromans - blood
  • Data processing
  • Datasets
  • Diet
  • Diet - veterinary
  • Diets
  • Ecological life histories
  • Ecology
  • Fruit
  • Fruits
  • Fundamental and applied biological sciences. Psychology
  • General aspects
  • Hydrology/Water Resources
  • Invertebrates
  • Life history
  • Life Sciences
  • Longevity
  • Metabolism
  • Micronutrients
  • Nutrients
  • Phylogeny
  • Physiological Ecology - Original Paper
  • Physiological Ecology - Original Papers
  • Plant Sciences
  • Principal components analysis
  • Seasonal variations
  • Seasons
  • Seeds
  • Species Specificity
  • Statistical variance
  • Uric acid
  • Uric Acid - blood
  • Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
  • Vitamin E
  • Vitamin E - analogs & derivatives
  • Vitamin E - blood
  • Wild birds
  • Zeaxanthin
ispartof: Oecologia, 2009, Vol.161 (4), p.673-683
description: Micronutrient antioxidants are thought to be generally important for health in many animals, but factors determining levels in individuals and species are not well understood. Diet and season are obvious environmental variables that might predict the degree to which species can accumulate such nutrients. We analyzed antioxidant levels [Trolox-equivalent antioxidant capacity (TEAC), uric acid (UA), vitamin E, and four carotenoids] in 95 bird species and compared these to species-level data on diet from the literature. Using compositional principal components analysis, we identified two main axes of diet variation: invertebrate consumption and seed-to-fruit ratio. We then examined associations between diet axes and antioxidant measures, with and without control for life-history variation and phytogeny. We also analyzed a subset of 13 species for which we had data on seasonally of antioxidant levels and diet, assessing the variance in antioxidant levels explained by seasonally, diet, and species. Unsurprisingly, there were strong associations between antioxidant levels and diet. TEAC and UA concentration were consistently positively associated with invertebrate consumption and seed-to-fruit ratio, and carotenoid concentrations (e.g. zeaxanthin and β-carotene) were negatively associated with invertebrate consumption. However, vitamin E was not associated with diet as measured here. Importantly, there is much variation in antioxidants that is not explained by diet, and we are able to identify diet-independent effects of species, season/breeding stage, and life history on antioxidant levels. Circulating antioxidant concentrations within and across species can therefore be viewed as a function of multiple factors, including but not limited to diet, and antioxidant metabolism appears to differ across species and seasons irrespective of diet.
language: eng
source:
identifier: ISSN: 0029-8549
fulltext: no_fulltext
issn:
  • 0029-8549
  • 1432-1939
url: Link


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titleSerum Antioxidant Levels in Wild Birds Vary in Relation to Diet, Season, Life History Strategy, and Species
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descriptionMicronutrient antioxidants are thought to be generally important for health in many animals, but factors determining levels in individuals and species are not well understood. Diet and season are obvious environmental variables that might predict the degree to which species can accumulate such nutrients. We analyzed antioxidant levels [Trolox-equivalent antioxidant capacity (TEAC), uric acid (UA), vitamin E, and four carotenoids] in 95 bird species and compared these to species-level data on diet from the literature. Using compositional principal components analysis, we identified two main axes of diet variation: invertebrate consumption and seed-to-fruit ratio. We then examined associations between diet axes and antioxidant measures, with and without control for life-history variation and phytogeny. We also analyzed a subset of 13 species for which we had data on seasonally of antioxidant levels and diet, assessing the variance in antioxidant levels explained by seasonally, diet, and species. Unsurprisingly, there were strong associations between antioxidant levels and diet. TEAC and UA concentration were consistently positively associated with invertebrate consumption and seed-to-fruit ratio, and carotenoid concentrations (e.g. zeaxanthin and β-carotene) were negatively associated with invertebrate consumption. However, vitamin E was not associated with diet as measured here. Importantly, there is much variation in antioxidants that is not explained by diet, and we are able to identify diet-independent effects of species, season/breeding stage, and life history on antioxidant levels. Circulating antioxidant concentrations within and across species can therefore be viewed as a function of multiple factors, including but not limited to diet, and antioxidant metabolism appears to differ across species and seasons irrespective of diet.
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subjectAdaptation, Physiological ; Animal and plant ecology ; Animal, plant and microbial ecology ; Animals ; Animals, Wild ; Antioxidants ; Antioxidants - analysis ; Antioxidants - metabolism ; Aves ; beta -Carotene ; Biological and medical sciences ; Biomedical and Life Sciences ; Birds - blood ; Birds - classification ; Birds - physiology ; Breeding ; Carotenoids ; Carotenoids - blood ; Chromans - blood ; Data processing ; Datasets ; Diet ; Diet - veterinary ; Diets ; Ecological life histories ; Ecology ; Fruit ; Fruits ; Fundamental and applied biological sciences. Psychology ; General aspects ; Hydrology/Water Resources ; Invertebrates ; Life history ; Life Sciences ; Longevity ; Metabolism ; Micronutrients ; Nutrients ; Phylogeny ; Physiological Ecology - Original Paper ; Physiological Ecology - Original Papers ; Plant Sciences ; Principal components analysis ; Seasonal variations ; Seasons ; Seeds ; Species Specificity ; Statistical variance ; Uric acid ; Uric Acid - blood ; Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution ; Vitamin E ; Vitamin E - analogs & derivatives ; Vitamin E - blood ; Wild birds ; Zeaxanthin
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descriptionMicronutrient antioxidants are thought to be generally important for health in many animals, but factors determining levels in individuals and species are not well understood. Diet and season are obvious environmental variables that might predict the degree to which species can accumulate such nutrients. We analyzed antioxidant levels [Trolox-equivalent antioxidant capacity (TEAC), uric acid (UA), vitamin E, and four carotenoids] in 95 bird species and compared these to species-level data on diet from the literature. Using compositional principal components analysis, we identified two main axes of diet variation: invertebrate consumption and seed-to-fruit ratio. We then examined associations between diet axes and antioxidant measures, with and without control for life-history variation and phytogeny. We also analyzed a subset of 13 species for which we had data on seasonally of antioxidant levels and diet, assessing the variance in antioxidant levels explained by seasonally, diet, and species. Unsurprisingly, there were strong associations between antioxidant levels and diet. TEAC and UA concentration were consistently positively associated with invertebrate consumption and seed-to-fruit ratio, and carotenoid concentrations (e.g. zeaxanthin and β-carotene) were negatively associated with invertebrate consumption. However, vitamin E was not associated with diet as measured here. Importantly, there is much variation in antioxidants that is not explained by diet, and we are able to identify diet-independent effects of species, season/breeding stage, and life history on antioxidant levels. Circulating antioxidant concentrations within and across species can therefore be viewed as a function of multiple factors, including but not limited to diet, and antioxidant metabolism appears to differ across species and seasons irrespective of diet.
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1Animal and plant ecology
2Animal, plant and microbial ecology
3Animals
4Animals, Wild
5Antioxidants
6Antioxidants - analysis
7Antioxidants - metabolism
8Aves
9beta -Carotene
10Biological and medical sciences
11Biomedical and Life Sciences
12Birds - blood
13Birds - classification
14Birds - physiology
15Breeding
16Carotenoids
17Carotenoids - blood
18Chromans - blood
19Data processing
20Datasets
21Diet
22Diet - veterinary
23Diets
24Ecological life histories
25Ecology
26Fruit
27Fruits
28Fundamental and applied biological sciences. Psychology
29General aspects
30Hydrology/Water Resources
31Invertebrates
32Life history
33Life Sciences
34Longevity
35Metabolism
36Micronutrients
37Nutrients
38Phylogeny
39Physiological Ecology - Original Paper
40Physiological Ecology - Original Papers
41Plant Sciences
42Principal components analysis
43Seasonal variations
44Seasons
45Seeds
46Species Specificity
47Statistical variance
48Uric acid
49Uric Acid - blood
50Vertebrates: general zoology, morphology, phylogeny, systematics, cytogenetics, geographical distribution
51Vitamin E
52Vitamin E - analogs & derivatives
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54Wild birds
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7Antioxidants - metabolism
8Aves
9beta -Carotene
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16Carotenoids
17Carotenoids - blood
18Chromans - blood
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22Diet - veterinary
23Diets
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43Seasonal variations
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45Seeds
46Species Specificity
47Statistical variance
48Uric acid
49Uric Acid - blood
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51Vitamin E
52Vitamin E - analogs & derivatives
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abstractMicronutrient antioxidants are thought to be generally important for health in many animals, but factors determining levels in individuals and species are not well understood. Diet and season are obvious environmental variables that might predict the degree to which species can accumulate such nutrients. We analyzed antioxidant levels [Trolox-equivalent antioxidant capacity (TEAC), uric acid (UA), vitamin E, and four carotenoids] in 95 bird species and compared these to species-level data on diet from the literature. Using compositional principal components analysis, we identified two main axes of diet variation: invertebrate consumption and seed-to-fruit ratio. We then examined associations between diet axes and antioxidant measures, with and without control for life-history variation and phytogeny. We also analyzed a subset of 13 species for which we had data on seasonally of antioxidant levels and diet, assessing the variance in antioxidant levels explained by seasonally, diet, and species. Unsurprisingly, there were strong associations between antioxidant levels and diet. TEAC and UA concentration were consistently positively associated with invertebrate consumption and seed-to-fruit ratio, and carotenoid concentrations (e.g. zeaxanthin and β-carotene) were negatively associated with invertebrate consumption. However, vitamin E was not associated with diet as measured here. Importantly, there is much variation in antioxidants that is not explained by diet, and we are able to identify diet-independent effects of species, season/breeding stage, and life history on antioxidant levels. Circulating antioxidant concentrations within and across species can therefore be viewed as a function of multiple factors, including but not limited to diet, and antioxidant metabolism appears to differ across species and seasons irrespective of diet.
copBerlin/Heidelberg
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pmid19669166
doi10.1007/s00442-009-1423-9