Publication Date:
2024-03-15
Description:
To date, numerous studies have shown negative impacts of CO2-acidified seawater (i.e. ocean acidification, OA) on marine organisms including calcifying invertebrates and fishes; however, limited research has been conducted on the physiological effects of OA on polar fishes and even less on the impacts of OA on early developmental stages of polar fishes. We evaluated aspects of aerobic metabolism and cardiorespiratory physiology of juvenile emerald rockcod Trematomus bernacchii, an abundant fish in the Ross Sea, Antarctica, to elevated partial pressure of carbon dioxide (pCO2) (420 [Ambient], 650 [Moderate] and 1050 [High] μtam pCO2) over a one-month period. We examined cardiorespiratory physiology including heart rate, stroke volume, cardiac output and ventilation, whole organism metabolism via oxygen consumption rate, and sub-organismal aerobic capacity by citrate synthase enzyme activity. Juvenile fish showed an increase in ventilation rate under High pCO2 compared to Ambient pCO2, while cardiac performance, oxygen consumption, and citrate synthase activity were not significantly affected by elevated pCO2. Acclimation time did have a significant effect on ventilation rate, stroke volume, cardiac output and citrate synthase activity, such that all metrics increased over the 4-week exposure period. These results suggest that juvenile emerald rockcod are robust to near-future increases in OA and may have the capacity to adjust for future increases in pCO2 by increasing acid-base compensation through increased ventilation.
Keywords:
Alkalinity, total; Alkalinity, total, standard deviation; Animalia; Antarctic; Aragonite saturation state; Aragonite saturation state, standard deviation; Behaviour; Bicarbonate ion; Bicarbonate ion, standard deviation; Bottles or small containers/Aquaria (〈20 L); Calcite saturation state; Calcite saturation state, standard deviation; Calculated using seacarb; Calculated using seacarb after Nisumaa et al. (2010); Calculated using seacarb after Orr et al. (2018); Cape_Evans_Ice_Wall; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Carbon dioxide, standard deviation; Cardiac output; Chordata; Citrate synthase activity, per protein mass; Citrate synthase activity per fresh mass; Coast and continental shelf; Day of experiment; EXP; Experiment; File name; Fish, standard length; Fish, standard length, standard deviation; Fish, standard length, standard error; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Fugacity of carbon dioxide in seawater, standard deviation; Fulton's condition factor; Fulton's condition factor, standard deviation; Fulton's condition factor, standard error; Growth/Morphology; Heart rate; Heart rate, standard error; Identification; Laboratory experiment; Mass; Mass, standard deviation; Mass, standard error; Mass specific cardiac output; Mass specific stroke volume; Nekton; OA-ICC; Ocean Acidification International Coordination Centre; Other studied parameter or process; Partial pressure of carbon dioxide, standard deviation; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Pelagos; pH; pH, standard deviation; Polar; Potentiometric; Potentiometric titration; Registration number of species; Replicate; Respiration; Respiration rate, oxygen; Salinity; Salinity, standard deviation; Single species; Species; Stroke volume; Temperature, water; Temperature, water, standard deviation; Treatment; Trematomus bernacchii; Type; Uniform resource locator/link to reference; Ventilation rate; Ventilation rate, standard error
Type:
Dataset
Format:
text/tab-separated-values, 16244 data points
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