Seawater carbonate chemistry and blood acid-base balance and other blood parameters of demersal shark species Haploblepharus edwardsii, supplement to: Dziergwa, Jacqueline; Singh, Sarika; Bridges, Christopher R; Kerwath, Sven; Enax, Joachim; Auerswald, Lutz (2019): Acid-base adjustments and first evidence of denticle corrosion caused by ocean acidification conditions in a demersal shark species. Scientific Reports, 9(1)

• Main Authors: Dziergwa, Jacqueline, Singh, Sarika, Bridges, Christopher R, Kerwath, Sven, Enax, Joachim, Auerswald, Lutz
• Format: Dataset
• Language: English
• Published: PANGAEA - Data Publisher for Earth & Environmental Science 2019
• Subjects: Acid-base regulation; Animalia; Benthos; Chordata; Coast and continental shelf; Containers and aquaria 20-1000 L or < 1 m**2; Haploblepharus edwardsii; Laboratory experiment; Nekton; Single species; South Atlantic; Temperate; Type; Species; Registration number of species; Uniform resource locator/link to reference; Treatment; Time in hours; Time in weeks; Replicates; Haemolymph, pH; Haemolymph, pH, standard deviation; Carbon, inorganic, dissolved; Carbon, inorganic, dissolved, standard deviation; Haemolymph, partial pressure of carbon dioxide; Partial pressure of carbon dioxide, standard deviation; Haemolymph, bicarbonate ion + carbonate ion; Haemolymph, bicarbonate ion + carbonate ion, standard error; Haemolymph, calcium ion; Calcium ion, standard deviation; Haemolymph, magnesium ion; Magnesium ion, standard deviation; Haematocrit; Haematocrit, standard deviation; Carbon; Carbon, standard deviation; Nitrogen; Nitrogen, standard deviation; Oxygen; Oxygen, standard deviation; Fluorine; Fluorine, standard deviation; Sodium; Sodium, standard deviation; Magnesium; Magnesium, standard deviation; Phosphorus; Phosphorus, standard deviation; Gold; Gold, standard deviation; Chlorine; Chlorine, standard deviation; Palladium; Palladium std dev; Calcium; Calcium, standard deviation; Ratio; Ratio, standard deviation; Temperature, water; Temperature, water, standard deviation; pH; pH, standard deviation; Alkalinity, total; Alkalinity, total, standard deviation; Oxygen saturation; Oxygen saturation, standard deviation; Salinity; Salinity, standard deviation; Calcium ion; Magnesium ion; Partial pressure of carbon dioxide water at sea surface temperature wet air; Bicarbonate; Bicarbonate ion, standard deviation; Carbonate ion; Carbonate ion, standard deviation; Carbonate system computation flag; Carbon dioxide; Fugacity of carbon dioxide water at sea surface temperature wet air; Bicarbonate ion; Aragonite saturation state; Calcite saturation state; Experiment; Potentiometric; Potentiometric titration; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. 2010; Ocean Acidification International Coordination Centre OA-ICC; Sven; Ocean acidification
• Online Access: https://dx.doi.org/10.1594/pangaea.911397; https://doi.pangaea.de/10.1594/PANGAEA.911397

Global ocean acidification is expected to chronically lower the pH to 7.3 (>2200 µatm seawater pCO2) by the year 2300. Acute hypercapnia already occurs along the South African west and south coasts due to upwelling- and low-oxygen events, with increasing frequency. In the present project we investigated the impact of hypercapnia on the endemic demersal shark species Haploblepharus edwardsii. Specifically, we experimentally analysed acid-base regulation during acute and chronic hypercapnia, the effects of chronic hypercapnia on growth rates and on denticle structure- and composition. While H. edwardsii are physiologically well adapted to acute and chronic hypercapnia, we observed, for the first time, denticle corrosion as a result of chronic exposure. We conclude that denticle corrosion could increase denticle turnover and compromise hydrodynamics and skin protection. : In order to allow full comparability with other ocean acidification data sets, the R package seacarb (Gattuso et al, 2019) was used to compute a complete and consistent set of carbonate system variables, as described by Nisumaa et al. (2010). In this dataset the original values were archived in addition with the recalculated parameters (see related PI). The date of carbonate chemistry calculation by seacarb is 2020-01-28.