Data from: CO2-induced ocean acidification does not affect individual or group behaviour in a temperate damselfish

• Main Authors: Kwan, Garfield Tsz, Hamilton, Trevor James, Tresguerres, Martin
• Format: Other/Unknown Material
• Language: unknown
• Published: Zenodo 2017
• Subjects: anxiety; upwelling; GABA; kelp; Chromis punctipinnis; Califonia fish; Ocean acidification
• Online Access: https://doi.org/10.5061/dryad.2m353

Open ocean surface CO2 levels are projected to reach approximately 800 µatm, and ocean pH to decrease by approximately 0.3 units by the year 2100 due to anthropogenic CO2 emissions and the subsequent process of ocean acidification (OA). When exposed to these CO2/pH values, several fish species display abnormal behaviour in laboratory tests, an effect proposed to be linked to altered neuronal GABAA­ receptor function. Juvenile blacksmith (Chromis punctipinnis) are social fish that regularly experience CO2/pH fluctuations through kelp forest diurnal primary production and upwelling events, so we hypothesized that they might be resilient to OA. Blacksmiths were exposed to control conditions (pH ∼ 7.92; pCO2 ∼ 540 µatm), constant acidification (pH ∼ 7.71; pCO2 ∼ 921 µatm) and oscillating acidification (pH ∼ 7.91, pCO2 ∼ 560 µatm (day), pH ∼ 7.70, pCO2 ∼ 955 µatm (night)), and caught and tested in two seasons of the year when the ocean temperature was different: winter (16.5 ± 0.1°C) and summer (23.1 ± 0.1°C). Neither constant nor oscillating CO2-induced acidification affected blacksmith individual light/dark preference, inter-individual distance in a shoal or the shoal's response to a novel object, suggesting that blacksmiths are tolerant to projected future OA conditions. However, blacksmiths tested during the winter demonstrated significantly higher dark preference in the individual light/dark preference test, thus confirming season and/or water temperature as relevant factors to consider in behavioural tests. Kwan et al.,Dryad_data_Final Due to anthropogenic CO 2 emissions and the subsequent process of ocean acidification (OA), open ocean surface CO 2 levels are projected to more than double to ~1,000 μatm, and pH to decrease by ~0.3 units by the year 2100. When exposed to these CO 2 /pH values, several fish species display abnormal behaviour in laboratory tests, an effect proposed to be linked to altered neuronal GABA A receptor function. This study examined the effects of constant and oscillating OA-like ...