title: Development of adrenergic and cholinergic receptor cardiovascular regulatory capacity in the Canada goose (Branta canadensis) and domestic goose (Anser anser domesticus).
abstract: Adrenergic control of cardiovascular function is a common component of regulation in embryonic birds studied to date. Our goal was to investigate adrenergic and cholinergic cardiovascular regulation in two goose species, the Canada goose (Branta canadensis) and the related domestic goose (Anser anser domesticus) to determine if these species possess similar regulation during embryonic development. We determined mean arterial pressure (Pm) and heart rate (fH) responses to serial blockade of cholinergic, β-adrenergic and α-adrenergic receptors in B. canadensis and A. domesticus at 70 and 90% of total incubation (28days). Both species possessed cholinergic and β-adrenergic tone on fH at 70% of incubation that increased in intensity with development. In addition, a constant α-adrenergic tone on Pm was present in both species. Our findings indicate that these geese species possess both cholinergic and adrenergic cardiovascular regulation providing information needed for speculation regarding the commonalities in the ontogeny of these cardiovascular regulatory elements in birds.
authors.affiliation: Department of Biology, University of North Dakota, Grand Forks, ND 58202, USA.
authors.forename: Justin
authors.initials: J
authors.lastname: Swart
authors.forename: Kevin
authors.initials: K
authors.lastname: Tate
authors.forename: Dane A
authors.initials: DA
authors.lastname: Crossley
mesh_terms: D000818:Animals; D001285:Atropine / Q000494:pharmacology; D001794:Blood Pressure; D049033:Chorioallantoic Membrane / Q000098:blood supply; D005777:Geese / Q000196:embryology* / Q000502:physiology; D006339:Heart Rate; D019344:Lactic Acid / Q000097:blood; D018727:Muscarinic Antagonists / Q000494:pharmacology; D010646:Phentolamine / Q000494:pharmacology; D011433:Propranolol / Q000494:pharmacology; D011941:Receptors, Adrenergic / Q000378:metabolism*; D011978:Receptors, Nicotinic / Q000378:metabolism*; D013045:Species Specificity
chemical_list: D018727:Muscarinic Antagonists; D011941:Receptors, Adrenergic; D011978:Receptors, Nicotinic; D019344:Lactic Acid; D001285:Atropine; D011433:Propranolol; D010646:Phentolamine
keywords: Adrenergic; Avian; CAM; Cardiovascular; Cholinergic; P(m); chorioallantoic membrane; f(H); heart rate (beats min(−1)); mean arterial pressure (kPa) measured in kPa through a CAM artery in embryos 70% of embryonic incubation/development for goose embryos (day 20 of total incubation) 90% of embryonic incubation/development for goose embryos (day 25 of total incubation)