Branchial Acid and Ammonia Fluxes in Response to Alkalosis and Acidosis in Two Marine Teleosts: Coho Salmon (Oncorhynchus kisutch) and Starry Flounder (Platichthys stellatus)
| Autor: | Todd Prior, D. Gordon McDonald, C. Louise Milligan |
|---|---|
| Rok vydání: | 1991 |
| Předmět: |
medicine.medical_specialty
Alkalosis biology Physiology Analytical chemistry Flounder Acid–base homeostasis medicine.disease biology.organism_classification Platichthys Ammonia chemistry.chemical_compound Endocrinology chemistry Physiology (medical) Internal medicine medicine Oncorhynchus Animal Science and Zoology Respiratory system hormones hormone substitutes and hormone antagonists Starry flounder |
| Zdroj: | Physiological Zoology. 64:169-192 |
| ISSN: | 0031-935X |
| DOI: | 10.1086/physzool.64.1.30158518 |
| Popis: | Metabolic acidosis, whether endogenous (exhaustive exercise) or exogenous (ammonium sulfate infusion), had qualitatively similar effects on net ammonia flux ($J_{net}^{Am}$) and net transfer of acid-base equivalents ($J_{net}^{H^{+}}$) in salmon and flounder. Intravascular infusion of $^{35}S-labeled$ ammonium sulfate resulted in a rapid and large increase in $J_{net}^{Am}$ in both ospecies, although $J_{net}^{Am}$ was about three times greater in salmon than in flounder. Rates of $^{35}SO_{4}$ clearance in salmon were 50-60 times those in flounder, and $^{35}SO_{4}$ was distributed in a much smaller space than in flounder. Exhaustive exercise also led to increases in both $J_{net}^{Am}$ and $J_{net}^{H^{+}}$ and again fluxes were 2-3 times greater in salmon than flounder. In both treatments the blood acid-base disturbance was corrected more rapidly in salmon than in flounder. Metabolic alkalosis (sodium lactate infusion) also elicited qualitatively different responses from salmon and flounder. In salmon,... |
| Databáze: | OpenAIRE |
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