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Université de Fribourg

Hormonal modulation of larval begging and growth in the burying beetle Nicrophorus vespilloides

Crook, Tara C. ; Flatt, Thomas ; Smiseth, Per T.

In: Animal behaviour, 2008, vol. 75, no. 1, p. 71-77

Recent studies on birds show that two steroid hormones, testosterone and corticosterone, stimulate nestling begging and growth. Here, we seek to investigate whether juvenile hormone, a major regulatory insect hormone, has similar effects on larval begging and growth in insects. To this end, we experimentally elevated larval juvenile hormone levels by topical application of methoprene, a potent...

Université de Fribourg

Relation of Heart Rate and its Variability during Sleep with Age, Physical Activity, and Body Composition in Young Children

Herzig, David ; Eser, Prisca ; Radtke, Thomas ; Wenger, Alina ; Rusterholz, Thomas ; Wilhelm, Matthias ; Achermann, Peter ; Arhab, Amar ; Jenni, Oskar G. ; Kakebeeke, Tanja H. ; Leeger-Aschmann, Claudia S. ; Messerli-Bürgy, Nadine ; Meyer, Andrea H. ; Munsch, Simone ; Puder, Jardena J. ; Schmutz, Einat A. ; Stülb, Kerstin ; Zysset, Annina E. ; Kriemler, Susi

In: Frontiers in Physiology, 2017, vol. 8, no. 109, p. 1-12

Background: Recent studies have claimed a positive effect of physical activity and body composition on vagal tone. In pediatric populations, there is a pronounced decrease in heart rate with age. While this decrease is often interpreted as an age-related increase in vagal tone, there is some evidence that it may be related to a decrease in intrinsic heart rate. This factor has not been taken into...

Consortium of Swiss Academic Libraries

Ageing as a determinant of renal and vascular disease: role of endothelial factors

Barton, Matthias

In: Nephrology Dialysis Transplantation, 2005, vol. 20, no. 3, p. 485-490