Ocean acidification slows retinal function in a damselfish through interference with GABAA receptors

Chung, Wen-Sung, Marshall, N. Justin, Watson, Sue-Ann, Munday, Philip L., and Nilsson, Göran E. (2014) Ocean acidification slows retinal function in a damselfish through interference with GABAA receptors. Journal of Experimental Biology, 217. pp. 323-326.

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Abstract

Vision is one of the most efficient senses used by animals to catch prey and avoid predators. Therefore, any deficiency in the visual system could have important consequences for individual performance. We examined the effect of CO2 levels projected to occur by the end of this century on retinal responses in a damselfish, by determining the threshold of its flicker electroretinogram (fERG). The maximal flicker frequency of the retina was reduced by continuous exposure to elevated CO2, potentially impairing the capacity of fish to react to fast events. This effect was rapidly counteracted by treatment with a GABA antagonist (gabazine), indicating that GABAA receptor function is disrupted by elevated CO2. In addition to demonstrating the effects of elevated CO2 on fast flicker fusion of marine fishes, our results show that the fish retina could be a model system to study the effects of high CO2 on neural processing.

Item ID: 32084
Item Type: Article (Research - C1)
ISSN: 1477-9145
Keywords: flicker fusion frequency, electroretinogram, carbon dioxide, vision, coral reef
Funders: Australian Research Council (ARC), ARC Centre of Excellence for Coral Reef Studies, University of Oslo
Date Deposited: 12 Jun 2014 05:48
FoR Codes: 05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change @ 50%
06 BIOLOGICAL SCIENCES > 0602 Ecology > 060205 Marine and Estuarine Ecology (incl Marine Ichthyology) @ 20%
06 BIOLOGICAL SCIENCES > 0602 Ecology > 060203 Ecological Physiology @ 30%
SEO Codes: 96 ENVIRONMENT > 9603 Climate and Climate Change > 960399 Climate and Climate Change not elsewhere classified @ 50%
97 EXPANDING KNOWLEDGE > 970106 Expanding Knowledge in the Biological Sciences @ 50%
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