Plasma arginine vasotocin and angiotensin II concentrations during saline acclimation in birds with salt glands ...
Pekin ducks (Anas platyrhynchos), Canada geese (Branta canadensis) and Glaucous-winged gulls (Larus glaucescens) responded differently during acclimation to saline equivalent to full strength sea water. All species were in hydrosmotic balance until they were given 375 mM NaCl. When the birds drank 7...
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| Format: | Text |
| Language: | English |
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University of British Columbia
2010
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| Online Access: | https://dx.doi.org/10.14288/1.0098508 https://doi.library.ubc.ca/10.14288/1.0098508 |
| Summary: | Pekin ducks (Anas platyrhynchos), Canada geese (Branta canadensis) and Glaucous-winged gulls (Larus glaucescens) responded differently during acclimation to saline equivalent to full strength sea water. All species were in hydrosmotic balance until they were given 375 mM NaCl. When the birds drank 75 mM NaCl ducks transiently decreased plasma sodium concentration ([Na⁺][formula omitted]) and osmolality (Osm[formula omitted]) and increased cloacal Na⁺ excretion; geese transiently increased hematocrit (Hct), suggesting transient extracellular dehydration; and gulls increased Osm[formula omitted] (but not Hct), suggesting that their Osm[formula omitted] had been below normal when fresh water was offered. During acclimation to moderately concentrated saline, all species progressively increased plasma arginine vasotocin levels ([AVT][formula omitted]) (without concomitant increase in Osm[formula omitted]) and decreased plasma angiotensin II concentration ([Ang II][formula omitted]) without parallel changes in ... |
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