Diel pattern of corticosterone metabolites in Arctic barnacle goslings (Branta leucopsis) under continuous natural lightScheiber, I., de Jong, M., Komdeur, J., Pschernig, E., Loonen, M. J. J. E., Millesi, E. & Weiss, B. M., 7-Aug-2017, In : PLoS ONE. 12, 8, 17 p., e0182861.
Research output: Contribution to journal › Article › Academic › peer-review
Here we describe the excretion pattern of corticosterone metabolites collected from droppings in barnacle goslings (Branta leucopsis) raised under 24 hours of continuous natural light in the Arctic. In lower latitudes, circulating corticosterone peaks around waking and shows a nadir between midnight and 4:00, whereas the peak and nadir are time-delayed slightly when measuring corticosterone metabolites from droppings. Photoperiod, along with other environmental factors, helps to entrain an animal's endogenous rhythm to that of the natural world. North of the Arctic Circle, photoperiod may not be a reliable cue as light is continuously absent during the winter and continuously present during the summer. Here, for the first time, we used droppings to describe a 24-hour excretion pattern of corticosterone metabolites (CORTm). By applying circular statistics for dependent data, we found a diel rhythmic pattern even under continuous natural light. We discuss potential alternative 'Zeitgeber' that may function even in the polar regions, focusing on melatonin. We propose a line of research to measure melatonin non-invasively from droppings. We also provide a validation of the adopted enzyme immunoassay (EIA) that was originally developed for greylag geese.
|Number of pages||17|
|Publication status||Published - 7-Aug-2017|
- FECAL GLUCOCORTICOID METABOLITES, WHITE-CROWNED SPARROW, GEESE ANSER-ANSER, LONGSPURS CALCARIUS-LAPPONICUS, STRESS-INDUCED CORTICOSTERONE, GREYLAG GEESE, BASE-LINE, ENZYME-IMMUNOASSAY, LAPLAND LONGSPURS, CIRCADIAN-RHYTHMS
Effects of heavy metal contamination on stress response modulation and stress coping abilities in barnacle geese
Komdeur, J., Schlögl-Weiß, G. & Scheiber, I.
01/02/2013 → 01/08/2016