Wojczulanis-Jakubas K, Jakubas D, Kulpinska-Chamera M, Chastel O
Whether a bird would continue parental care in stressful
conditions or desert the brood prioritizing its own survival over the offspring
very much depends on a balance between corticosterone (CORT; the stress
hormone, increasing in response to stress) and prolactin (PRL; parental care
hormone, decreasing in response to stress). We examined these two hormones in
response to a standard capture-recapture protocol in the little auk, analyzing
them during the incubation and chick rearing periods, and comparing between the
sexes. We found the CORT and PRL stress responses were stronger during
incubation than chick rearing, and the differences are likely to result from inter-phase
differences in predation pressure. We also found some sex differences for both
hormones, suggesting differential exposure of males and females to stressors. More results, here.
New species of Tardigrada on Spitsbergen
"Etymology.— Karen means Katarzyna in Norwegian. I dedicate this new species to Katarzyna Wojczulanis−Jakubas from the University of Gdańsk (Poland) who collected the material."
Thank you Krzysztof!