AB 15:299-302 (2012)  -  DOI: https://doi.org/10.3354/ab00436

Sperm motility of the scleractinian coral Acropora digitifera under preindustrial, current, and predicted ocean acidification regimes

Masako Nakamura1,*, Masaya Morita2

1Okinawa Institute of Science and Technology, Okinawa 904-0412, Japan
2Sesoko Station, Tropical Biosphere Research Center, University of the Ryukyus, Okinawa 905-0227, Japan

ABSTRACT: Ocean acidification caused by the uptake of anthropogenic CO2 in the oceans negatively affects the early life stages of corals by reducing their calcification rate. Acidification also inhibits the sperm motility of corals, potentially affecting fertilization success. We investigated the effects of different pCO2 (partial pressure of CO2) conditions on the sperm motility of Acropora digitifera. Using a pCO2-control system, we maintained pCO2 at concentrations from preindustrial and present-day levels up to the level predicted by the year 2100 (300, 400, and 1000 ppm, respectively). Our results indicated that ocean acidification has the potential to suppress the sperm flagellar motility of A. digitifera. Furthermore, sperm motility will likely decline by ~30%, which may impact fertility, if the sensitivity of sperm motility to decreasing pH cannot adapt over a span of ~90 yr.


KEY WORDS: Ocean acidification · Scleractinian corals · Acropora · Sperm motility


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Cite this article as: Nakamura M, Morita M (2012) Sperm motility of the scleractinian coral Acropora digitifera under preindustrial, current, and predicted ocean acidification regimes. Aquat Biol 15:299-302. https://doi.org/10.3354/ab00436

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