CO2-induced ocean acidification increases anxiety in Rockfish via alteration of GABAA receptor functioning
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| Format: | Dataset Open Access |
| Sprache: | en |
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PANGAEA
2013
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| _version_ | 1867170045546725376 |
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| author | Hamilton, Trevor James Holcombe, Adam Tresguerres, Martin |
| author_facet | Hamilton, Trevor James Holcombe, Adam Tresguerres, Martin |
| collection | Datos científicos de ciencias marinas y ambientales |
| contents | The average surface pH of the ocean is dropping at a rapid rate due to the dissolution of anthropogenic CO2, raising concerns for marine life. Additionally, some coastal areas periodically experience upwelling of CO2-enriched water with reduced pH. Previous research has demonstrated ocean acidification (OA)-induced changes in behavioural and sensory systems including olfaction, which is due to altered function of neural gamma-aminobutyric acid type A (GABAA) receptors. Here, we used a camera-based tracking software system to examine whether OA-dependent changes in GABAA receptors affect anxiety in juvenile Californian rockfish (Sebastes diploproa). Anxiety was estimated using behavioural tests that measure light/dark preference (scototaxis) and proximity to an object. After one week in OA conditions projected for the next century in the California shore (1125 ± 100 µatm, pH 7.75), anxiety was significantly increased relative to controls (483 ± 40 µatm CO2, pH 8.1). The GABAA-receptor agonist muscimol, but not the antagonist gabazine, caused a significant increase in anxiety consistent with altered Cl- flux in OA-exposed fish. OA-exposed fish remained more anxious even after 7 days back in control seawater; however, they resumed their normal behaviour by day 12. These results show that OA could severely alter rockfish behaviour; however, this effect is reversible. |
| format | Dataset Open Access |
| id | pangaea_https___doi_org_10_1594_PANGAEA_834309 |
| institution | PANGAEA |
| language | en |
| publishDate | 2013 |
| publisher | PANGAEA |
| record_format | pangaea |
| spellingShingle | CO2-induced ocean acidification increases anxiety in Rockfish via alteration of GABAA receptor functioning Hamilton, Trevor James Holcombe, Adam Tresguerres, Martin Alkalinity, total; Alkalinity, total, standard error; Animalia; Aragonite saturation state; Behaviour; Bicarbonate ion; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chordata; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Distance; Distance, standard error; Figure; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Immobility; Immobility, standard error; Laboratory experiment; Nekton; North Pacific; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), standard error; Pelagos; pH, NBS scale; pH, standard error; pH, total scale; Potentiometric; Salinity; Salinity, standard error; Sebastes diploproa; Single species; Species; Table; Temperate; Temperature, water; Temperature, water, standard error; Time, standard error; Time in seconds; Treatment The average surface pH of the ocean is dropping at a rapid rate due to the dissolution of anthropogenic CO2, raising concerns for marine life. Additionally, some coastal areas periodically experience upwelling of CO2-enriched water with reduced pH. Previous research has demonstrated ocean acidification (OA)-induced changes in behavioural and sensory systems including olfaction, which is due to altered function of neural gamma-aminobutyric acid type A (GABAA) receptors. Here, we used a camera-based tracking software system to examine whether OA-dependent changes in GABAA receptors affect anxiety in juvenile Californian rockfish (Sebastes diploproa). Anxiety was estimated using behavioural tests that measure light/dark preference (scototaxis) and proximity to an object. After one week in OA conditions projected for the next century in the California shore (1125 ± 100 µatm, pH 7.75), anxiety was significantly increased relative to controls (483 ± 40 µatm CO2, pH 8.1). The GABAA-receptor agonist muscimol, but not the antagonist gabazine, caused a significant increase in anxiety consistent with altered Cl- flux in OA-exposed fish. OA-exposed fish remained more anxious even after 7 days back in control seawater; however, they resumed their normal behaviour by day 12. These results show that OA could severely alter rockfish behaviour; however, this effect is reversible. |
| title | CO2-induced ocean acidification increases anxiety in Rockfish via alteration of GABAA receptor functioning |
| topic | Alkalinity, total; Alkalinity, total, standard error; Animalia; Aragonite saturation state; Behaviour; Bicarbonate ion; Calcite saturation state; Calculated using CO2SYS; Calculated using seacarb after Nisumaa et al. (2010); Carbon, inorganic, dissolved; Carbonate ion; Carbonate system computation flag; Carbon dioxide; Chordata; Coast and continental shelf; Containers and aquaria (20-1000 L or < 1 m**2); Distance; Distance, standard error; Figure; Fugacity of carbon dioxide (water) at sea surface temperature (wet air); Immobility; Immobility, standard error; Laboratory experiment; Nekton; North Pacific; OA-ICC; Ocean acidification; Ocean Acidification International Coordination Centre; Partial pressure of carbon dioxide (water) at sea surface temperature (wet air); Partial pressure of carbon dioxide (water) at sea surface temperature (wet air), standard error; Pelagos; pH, NBS scale; pH, standard error; pH, total scale; Potentiometric; Salinity; Salinity, standard error; Sebastes diploproa; Single species; Species; Table; Temperate; Temperature, water; Temperature, water, standard error; Time, standard error; Time in seconds; Treatment |
| url | https://doi.org/10.1594/PANGAEA.834309 |