Breeding phased dependent oxidative balance in a small High Arctic seabird, the little auk
Reproduction is a demanding phase of bird's life cycle and imposes various physiological challenges. Increasing oxidative stress (OS) has been proposed as one of the costs associated with reproduction. In this study, we investigate the level of OS in a small Arctic seabird, the little auk Alle...
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crwiley:10.1111/jav.01702 2024-09-15T17:36:52+00:00 Breeding phased dependent oxidative balance in a small High Arctic seabird, the little auk Kulaszewicz, Izabela Wojczulanis‐Jakubas, Katarzyna Jakubas, Dariusz 2018 http://dx.doi.org/10.1111/jav.01702 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjav.01702 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jav.01702 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jav.01702 en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Journal of Avian Biology volume 49, issue 7 ISSN 0908-8857 1600-048X journal-article 2018 crwiley https://doi.org/10.1111/jav.01702 2024-07-09T04:11:06Z Reproduction is a demanding phase of bird's life cycle and imposes various physiological challenges. Increasing oxidative stress (OS) has been proposed as one of the costs associated with reproduction. In this study, we investigate the level of OS in a small Arctic seabird, the little auk Alle alle in relation to sex and phase of breeding (incubation, chick‐rearing). We also examine whether OS is related to the birds leucocyte profile. We expected increase in OS with the progress of breeding period (due to increasing energetic demands) and higher values in females (due to high initial investments in production of a large egg). Surprisingly, we found higher OS during incubation compared to chick‐rearing period, suggesting that incubation is a highly demanding reproductive phase in terms of oxidative balance. We suggests that those changes may be attributed to changes in hormone levels affecting oxidative status. Also, in contrasts to our expectations, we did not find sex differences in OS throughout the studied periods of breeding. Finally, we found positive relationships between OS level and haematological parameters: heterophils/lymphocytes ratio, number of leucocytes and lymphocytes per 10 000 erythrocytes, suggesting the effect of the oxidative stress on the immunological system. Article in Journal/Newspaper Alle alle little auk Wiley Online Library Journal of Avian Biology 49 7 e01702 |
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Open Polar |
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Wiley Online Library |
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crwiley |
language |
English |
description |
Reproduction is a demanding phase of bird's life cycle and imposes various physiological challenges. Increasing oxidative stress (OS) has been proposed as one of the costs associated with reproduction. In this study, we investigate the level of OS in a small Arctic seabird, the little auk Alle alle in relation to sex and phase of breeding (incubation, chick‐rearing). We also examine whether OS is related to the birds leucocyte profile. We expected increase in OS with the progress of breeding period (due to increasing energetic demands) and higher values in females (due to high initial investments in production of a large egg). Surprisingly, we found higher OS during incubation compared to chick‐rearing period, suggesting that incubation is a highly demanding reproductive phase in terms of oxidative balance. We suggests that those changes may be attributed to changes in hormone levels affecting oxidative status. Also, in contrasts to our expectations, we did not find sex differences in OS throughout the studied periods of breeding. Finally, we found positive relationships between OS level and haematological parameters: heterophils/lymphocytes ratio, number of leucocytes and lymphocytes per 10 000 erythrocytes, suggesting the effect of the oxidative stress on the immunological system. |
format |
Article in Journal/Newspaper |
author |
Kulaszewicz, Izabela Wojczulanis‐Jakubas, Katarzyna Jakubas, Dariusz |
spellingShingle |
Kulaszewicz, Izabela Wojczulanis‐Jakubas, Katarzyna Jakubas, Dariusz Breeding phased dependent oxidative balance in a small High Arctic seabird, the little auk |
author_facet |
Kulaszewicz, Izabela Wojczulanis‐Jakubas, Katarzyna Jakubas, Dariusz |
author_sort |
Kulaszewicz, Izabela |
title |
Breeding phased dependent oxidative balance in a small High Arctic seabird, the little auk |
title_short |
Breeding phased dependent oxidative balance in a small High Arctic seabird, the little auk |
title_full |
Breeding phased dependent oxidative balance in a small High Arctic seabird, the little auk |
title_fullStr |
Breeding phased dependent oxidative balance in a small High Arctic seabird, the little auk |
title_full_unstemmed |
Breeding phased dependent oxidative balance in a small High Arctic seabird, the little auk |
title_sort |
breeding phased dependent oxidative balance in a small high arctic seabird, the little auk |
publisher |
Wiley |
publishDate |
2018 |
url |
http://dx.doi.org/10.1111/jav.01702 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fjav.01702 https://onlinelibrary.wiley.com/doi/pdf/10.1111/jav.01702 https://onlinelibrary.wiley.com/doi/full-xml/10.1111/jav.01702 |
genre |
Alle alle little auk |
genre_facet |
Alle alle little auk |
op_source |
Journal of Avian Biology volume 49, issue 7 ISSN 0908-8857 1600-048X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/jav.01702 |
container_title |
Journal of Avian Biology |
container_volume |
49 |
container_issue |
7 |
container_start_page |
e01702 |
_version_ |
1810492637477601280 |