Vasodilatory effects of exogenous nitric oxide on the brood patch of the Zebra finch (Taeniopygia guttata)
Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
In birds like the Zebra finch (Taeniopygia guttata) the female, but not the male develop a brood patch upon incubation of eggs. The brood patch functions to increase heat exchange between the bird and the eggs. Development of the brood patch includes de-feathering, increased vascularization and edema formation. The increased vascularization is due to the development of arteriovenous anastomoses, AVA. The AVA are thermoregulatory vessels involved in cold induced vasodilation, CIVD, demonstrated to occur in the brood patch. Nitric oxide, NO, which is a well known vasodilator is a candidate substance for involvement in CIVD. In this study a NO-generating gel was applied to the brood patch of male and female zebra finches. Vasodilation was found to be markedly larger in females than in males. The larger vasodilation in the female brood patch is probably because NO vasodilate AVA selectively more than any other vessels. The study also investigated whether vasodilation would cause an increase in brood patch temperature. No definite changes in brood patch temperature could be observed and no conclusions could be drawn in the matter.
Place, publisher, year, edition, pages
2010. , 15 p.
Arteriovenous anastomoses, AVA, brood patch, cold induced vasodilation, CIVD, nitric oxide, NO, temperature, vasodilation, Zebra finch, Taeniopygia guttata
Physiology Biological Sciences Other Biological Topics
IdentifiersURN: urn:nbn:se:liu:diva-56855ISRN: LITH-IFM-Ex--10/2342--SEOAI: oai:DiVA.org:liu-56855DiVA: diva2:322888
2010-06-01, Bl32, Linköpings universitet, Campus Valla, Linköping, 13:40 (English)
UppsokLife Earth Science
Altimiras, Jordi, Docent
Hargeby, Anders, Universitetslektor