The effects of exposure to near-future levels of ocean acidification on activity and byssus Production of the Akoya pearl oyster, Pinctada fucata

Welladsen, Heather M., Heimann, Kirsten, and Southgate, Paul C. (2011) The effects of exposure to near-future levels of ocean acidification on activity and byssus Production of the Akoya pearl oyster, Pinctada fucata. Journal of Shellfish Research, 30 (1). pp. 85-88.

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Abstract

Human activities since the beginning of the industrial age have greatly increased the amount of carbon dioxide in the atmosphere. Increased levels of atmospheric carbon dioxide have already caused a 0.1-U decline in global ocean pH, and a continuing decline of 0.3–0.5 U is predicted by the end of 2100. Acidification of the oceans has widespread effects on marine organisms, including reduced rates of calcification and interruptions to normal physiological functions. This study used gaseous carbon dioxide to maintain seawater at 2 treatment levels of pH: 7.8 and 7.6. When compared with controls held at pH 8.1–8.2, pearl oysters (Pinctada fucata, Gould) held at pH 7.8 and pH 7.6 showed no significant difference in the number of byssal threads produced or total distance traveled. Byssal threads produced by oysters in the pH 7.6 treatment were significantly thinner than those produced by oysters in the control. However, it is postulated that this was a result of the acute stress of transfer to treatment conditions and not a result of physiological stress caused by near-future levels of ocean acidification. The potential for P. fucata to adapt to near-future levels of ocean acidification is discussed.

Item ID: 21104
Item Type: Article (Refereed Research - C1)
Keywords: ocean acidification, Pinctada fucata, byssus, pearl oyster
ISSN: 1943-6319
Date Deposited: 20 Mar 2012 05:22
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0704 Fisheries Sciences > 070401 Aquaculture @ 70%
05 ENVIRONMENTAL SCIENCES > 0501 Ecological Applications > 050101 Ecological Impacts of Climate Change @ 30%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830104 Aquaculture Oysters @ 70%
96 ENVIRONMENT > 9603 Climate and Climate Change > 960310 Global Effects of Climate Change and Variability (excl. Australia, New Zealand, Antarctica and the South Pacific) @ 30%
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