Effects of ocean acidification on the larval growth of olive flounder (Paralichthys olivaceus)

  • Kim K
  • Shim J
  • Kim S
ISSN: 1810-6285
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Abstract

Little is known about how marine fishes respond to the reduced pH condition caused by the increased CO2 in the atmosphere.We investigated the effects of CO2 concentration on the growth of olive flounder (Paralichthys olivaceus) larvae. Newly hatched larvae 5 were reared in three different concentrations of CO2 (574, 988 and 1297µatm CO2) in temperature-controlled water tanks until metamorphosis (4 weeks). Body lengths, weights, and the concentration of some chemical elements in larval tissue were mea- sured at the completion of each experiment, and experiment was repeated three times in May, June, and July 2011. Results indicated that body length and weight of floun- 10 der larvae were significantly increased with increasing CO2 concentration (P < 0.05). Daily growth rates of flounder larvae were higher (0.391mm) from the high CO2 con- centration (1297 µatm) than those (0.361mm and 0.360mm) from the lower ones (988 and 574 µatm).The measurement on some chemical elements (Ca, Fe, Cu, Zn and Sr) in fish tissue also revealed the increasing tendency of element concentration with in- 15 creasing CO2 in seawater, although statistical significance cannot be tested due to the single measurement. It suggests that there are enrichment processes of these cations in larval tissue in the low pH condition.

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Kim, K.-S., Shim, J. H., & Kim, S. (2013). Effects of ocean acidification on the larval growth of olive flounder (Paralichthys olivaceus). Biogeosciences Discussions, 10(4), 7413–7431. Retrieved from http://www.biogeosciences-discuss.net/10/7413/2013/

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