Effect of ocean acidification on otolith development in larvae of a tropical marine fish
By P. Munday, V. Hernaman, D. Dixson, S. Thorrold. 2011
130 citations recorded by the source corpus.
Abstract. Calcification in many invertebrate species is predicted to decline due to ocean acidification. The potential effects of elevated CO 2 and reduced carbonate saturation state on other species, such as fish, are less well understood. Fish otoliths (earbones) are composed of aragonite, and thus, might be susceptible to either the reduced availability of carbonate ions in seawater at low pH, or to changes in extracellular concentrations of bicarbonate and carbonate ions caused by acid-base regulation in fish exposed to high p CO 2 . We reared larvae of the clownfish Amphiprion percula from hatching to settlement at three pH NBS and p CO 2 levels (control: ~pH 8.15 and 404 μatm CO 2 ; intermediate: pH 7.8 and 1050 μatm CO 2 ; extreme: pH 7.6 and 1721 μatm CO 2 ) to test the possible effects of ocean acidification on otolith development. There was no effect of the intermediate treatment (pH 7.8 and 1050 μatm CO 2 ) on otolith size, shape, symmetry between left and right otoliths, or otolith elemental chemistry, compared with controls. However, in the more extreme treatment (pH 7.6 and 1721 μatm CO 2 ) otolith area and maximum length were larger than controls, although no other traits were significantly affected. Our results support the hypothesis that pH regulation in the otolith endolymph can lead to increased precipitation of CaCO 3 in otoliths of larval fish exposed to elevated CO 2 , as proposed by an earlier study, however, our results also show that sensitivity varies considerably among species. Importantly, our results suggest that otolith development in clownfishes is robust to even the more pessimistic changes in ocean chemistry predicted to occur by 2100.
Subfields: Ecology, Global and Planetary Change, Oceanography
View Paper: https://www.semanticscholar.org/paper/90d430b10c79c19ec14d27a86129eaf4b928398f
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Citations in the corpus
- Effects of ocean acidification on hatch size and larval growth of walleye pollock (Theragra chalcogramma) (2013, background): “In addition, several studies have shown that exposure to elevated CO2 levels results in hypercalcification of fish otoliths (Checkley et al., 2009; Munday et al., 2011b; Hurst et al., 2012).”
- Marine animal behaviour in a high CO2 ocean (2015, background): “Such physiological changes in response to OA can be variable among species (e.g. Munday et al. 2011) and warrant more research.”
- Resiliency of juvenile walleye pollock to projected levels of ocean acidification (2012, background): “…of Cl− and/ or HCO3− gradients over neuronal membranes, which result from acid-balance compensation for in creased blood and tissue CO2, appear to stimulate an excitatory neuronal response rather than the normal inhibitory response, thus resulting in abnormal be - haviors (Nilsson et al. 2012).”
- Effect of ocean acidification on early life stages of Atlantic herring (Clupea harengus L.) (2011, background): “However, Munday et al. (2011b) found no effect on spiny damselfish (Acanthochromis polyacanthus) otoliths.”
- The Impact of Ocean Acidification on Reproduction, Early Development and Settlement of Marine Organisms (2011, unknown): “More recent studies by Munday [105,106] on the marine clown fish Amphiprion percula reared at ambient (pH 8.15) and elevated CO 2 (pH 7.6–7.8) found no effect on otolith size, shape, symmetry or otolith chemistry at pH 7.8 and slightly greater otolith area at pH 7.6.”