Katarzyna Wojczulanis-Jakubas

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Recently published


Sex- and breeding stage-specific hormonal stress response of seabird parents. Hormones and Behaviour103: 71-79.

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.



Isohypsibius karenae


New species of Tardigrada on Spitsbergen


New species of tiny water bear (Tardigrada) was found and described by Polish reasercher, Krzysztof Zawierucha. The guy was named after me, as I was the one who picked up the precious sample from the ground :)

"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!