The impact of acute salinity exposure and temperature on the survival, osmoregulation, and hematology of juvenile shortnose sturgeon (Acipenserbrevirostrum)
| Autor: | Adam T. Downie, James D. Kieffer, Samantha Taylor, Hannah Wallace |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
0106 biological sciences
biology 010604 marine biology & hydrobiology Plasma chloride biology.organism_classification 010603 evolutionary biology 01 natural sciences Salinity Animal science Shortnose sturgeon Osmoregulation Juvenile Acipenser Animal Science and Zoology Seawater Survival rate Ecology Evolution Behavior and Systematics |
| Zdroj: | Canadian Journal of Zoology. 96:913-919 |
| ISSN: | 1480-3283 0008-4301 |
| DOI: | 10.1139/cjz-2017-0149 |
| Popis: | Juvenile shortnose sturgeon (Acipenser brevirostrum Lesueur, 1818) were exposed to seawater and freshwater for 24 h to evaluate the osmoregulatory capabilities over a seasonal temperature gradient (5, 10, 15, 20 °C). Additionally, juveniles were exposed to 5 °C seawater and freshwater over 72 h to evaluate survival and osmoregulatory capacity under cold water conditions. Osmoregulatory capability was evaluated using standard metrics: survival rate, mass loss, plasma chloride ion (Cl–) concentrations, osmolality, oxygen-carrying variables, and energy metabolites. Three mortalities occurred following 24 h exposure to 20 °C seawater (73% survival) and one mortality occurred within 72 h in 5 °C seawater (89% survival). Plasma Cl–concentrations and osmolality were elevated in seawater-exposed juveniles at every exposure time, regardless of temperature. The least mass was lost in juveniles exposed to 5 and 10 °C seawater, versus 15 and 20 °C seawater. Low mass loss is likely due to a lower metabolic rate and lower ventilation, which would slow the rate by which osmotic stress would occur under cold conditions. |
| Databáze: | OpenAIRE |
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