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Author |
Viviant Morgane, Jeanniard?du?Dot Tiphaine, Monestiez Pascal, Authier Matthieu, Guinet Christophe, Costa Daniel |
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Title |
Bottom time does not always predict prey encounter rate in Antarctic fur seals |
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Journal |
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Year |
2016 |
Publication |
Functional Ecology |
Abbreviated Journal |
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Volume |
30 |
Issue |
11 |
Pages |
1834-1844 |
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Keywords |
aerobic diving limit Antarctic fur seals diving behaviour foraging depth foraging strategies |
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109 |
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0269-8463 |
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0269-8463 |
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yes |
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6630 |
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Title |
Contrasting effects of climate and population density over time and life stages in a long?lived seabird |
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Journal |
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Year |
2017 |
Publication |
Functional Ecology |
Abbreviated Journal |
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Volume |
31 |
Issue |
6 |
Pages |
1275-1284 |
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109 |
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0269-8463 |
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0269-8463 |
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yes |
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6639 |
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Author |
Jeanniard?du?Dot Tiphaine, Guinet Christophe, Arnould John P.Y., Speakman John R., Trites Andrew W., Goldbogen Jeremy |
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Title |
Accelerometers can measure total and activity?specific energy expenditures in free?ranging marine mammals only if linked to time?activity budgets |
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Journal |
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Year |
2017 |
Publication |
Functional Ecology |
Abbreviated Journal |
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Volume |
31 |
Issue |
2 |
Pages |
377-386 |
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Keywords |
acceleration Antarctic fur seal energy expenditure foraging metabolic rate northern fur seal time?activity budget VeDBA |
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109 |
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0269-8463 |
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0269-8463 |
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yes |
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6641 |
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Title |
Reproductive effort and oxidative stress: effects of offspring sex and number on the physiological state of a long?lived bird |
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Year |
2017 |
Publication |
Functional Ecology |
Abbreviated Journal |
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31 |
Issue |
6 |
Pages |
1201-1209 |
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Keywords |
black?legged kittiwake cost of reproduction hypothesis malondialdehydes oxidative cost of reproduction parental care Rissa tridactyla: superoxide dismutase sex allocation |
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Abstract |
Summary Individuals must trade?off between energetically costly activities to maximize their fitness. However, the underlying physiological mechanism remains elusive. Oxidative stress, the imbalance between reactive oxygen species production and antioxidant and/or repair activities, has been suggested to underlie life?history trade?offs: greater investment in reproduction supposedly generating higher oxidative damage, thus reducing life span. While most studies used natural or experimental variation in offspring number to examine how reproduction affects oxidative stress, none studied the impact of offspring sex, although it could influence physiological costs and fitness, if the sexes differ in terms of energetic cost. Here, we aim at further understanding how reproduction (in terms of offspring sex, experimentally manipulated and number, not manipulated) influences oxidative stress in a wild seabird, where sons are energetically costlier than daughters. We did so by conducting a chick fostering experiment (to disentangle foster and produced sex ratio) and using four oxidative stress markers plus baseline corticosterone. First, the results suggest that individual physiological state before laying modulates upcoming reproductive effort. Individuals with higher pre?laying baseline corticosterone and lower antioxidant activity, estimated by their superoxide dismutase activity, subsequently invested more in reproduction, estimated by the cumulative number of days spent rearing chicks. Hence, it seems that only individuals that could afford to invest heavily in reproduction did so. Then, we examined the effects of reproductive effort on individual physiological state at the end of the breeding season. Higher reproductive effort seemed to imply higher physiological costs. Oxidative stress, estimated by the ratio of oxidized over reduced glutathione, increased with more male?biased foster sex ratio among mothers but not among fathers, whereas baseline corticosterone did so in both sexes. Similarly, lipid oxidative damage to red blood cells increased with increasing cumulative number of days spent rearing chicks. Our study provides the first evidence that brood sex ratio variation can affect oxidative balance, potentially in a sex?specific way, although more studies are needed to understand whether the observed physiological costs could lead to fitness costs. It also highlights the need to consider sex ratio in future studies investigating the role of oxidative stress in life?history trade?offs. A lay summary is available for this article. |
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1162 |
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0269-8463 |
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0269-8463 |
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yes |
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Serial |
6679 |
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Title |
Interpreting ELISA analyses from wild animal samples: Some recurrent issues and solutions |
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Book Chapter |
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Year |
2017 |
Publication |
Functional Ecology |
Abbreviated Journal |
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Volume |
31 |
Issue |
12 |
Pages |
2255-2262 |
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Programme |
333,1151 |
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Bachelor's thesis |
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0269-8463 |
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0269-8463 |
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yes |
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Call Number |
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Serial |
6740 |
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Title |
Individual variability in contaminants and physiological status in a resident Arctic seabird species |
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Year |
2019 |
Publication |
Environmental Pollution |
Abbreviated Journal |
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Volume |
249 |
Issue |
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Pages |
191-199 |
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Keywords |
Black guillemot Oxidative stress Polar regions Pollutants Seabirds Telomeres |
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137 |
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0269-7491 |
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0269-7491 |
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yes |
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Serial |
6031 |
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From Antarctica to the subtropics: Contrasted geographical concentrations of selenium, mercury, and persistent organic pollutants in skua chicks (Catharacta spp.) |
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Journal |
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Year |
2017 |
Publication |
Environmental Pollution |
Abbreviated Journal |
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Volume |
228 |
Issue |
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Pages |
464-473 |
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Keywords |
Bioaccumulation Blood Chick HCB Southern Ocean Stable isotopes |
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Abstract |
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Programme |
109 |
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0269-7491 |
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0269-7491 |
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yes |
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Call Number |
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Serial |
6633 |
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Title |
Microplastic pollution in the Greenland Sea: Background levels and selective contamination of planktivorous diving seabirds |
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Journal |
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Year |
2016 |
Publication |
Environmental Pollution |
Abbreviated Journal |
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Volume |
219 |
Issue |
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Pages |
1131-1139 |
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Keywords |
Arctic Little auk Plastic Sea ice Selective uptake Zooplankton |
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388 |
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0269-7491 |
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0269-7491 |
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yes |
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Call Number |
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Serial |
6917 |
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Title |
Does temporal variation of mercury levels in Arctic seabirds reflect changes in global environmental contamination, or a modification of Arctic marine food web functioning? |
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Year |
2016 |
Publication |
Environmental Pollution |
Abbreviated Journal |
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Volume |
211 |
Issue |
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Pages |
382-388 |
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Keywords |
Arctic Bio-indicator Little auk Metal Temporal trend Zooplankton |
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388 |
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0269-7491 |
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0269-7491 |
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6920 |
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Title |
Perfluorinated substances and telomeres in an Arctic seabird: Cross-sectional and longitudinal approaches |
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Year |
2017 |
Publication |
Environmental Pollution |
Abbreviated Journal |
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Volume |
230 |
Issue |
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Pages |
360-367 |
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Keywords |
Black-legged kittiwake DNA Organic contaminants PFASs Svalbard |
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330 |
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0269-7491 |
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0269-7491 |
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Call Number |
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Serial |
6981 |
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