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Almén, Anna-Karin; Brutemark, Andreas; Jutfelt, Fredrik; Riebesell, Ulf; Engström-Öst, Jonna (2016): Swimming activity and body size of Pseudocalanus acuspes (KOSMOS 2013, Kristineberg, Sweden). Environmental and Marine Biology, Åbo Akademi University, PANGAEA,, Supplement to: Almén, A-K et al. (2017): Ocean acidification causes no detectable effect on swimming activity and body size in a common copepod. Hydrobiologia, 802(1), 235-243,

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Ocean acidification can impair an animal's physiological performance and energetically demand- ing activities such as swimming. Behavioural abnor- malities and changed activity in response to ocean acidification are reported in fish and crustacean species. We studied swimming activity in the calanoid copepod Pseudocalanus acuspes in response to near- future ocean acidification. Water and copepods were sampled from ten mesocosms deployed on the Swedish west coast. The experiments were conducted on animals reared in the mesocosms for 2 months during spring. Copepods were filmed after long-term (chronic) high-CO2, and after 20 h acute exposure to CO2. There was no significant effect of CO2 on copepods in chronic high-CO2, nor significant effect after the 20 h acute exposure. In addition, we measured prosome length from a large number of adult copepods, but no effect of acidification on body size was found. In this study, P. acuspes did not show sensitivity to near-future pCO2 levels. Even if a number of papers suggest that copepods seem robust to future ocean acidification, interaction between multiple stress factors, such as elevated temperature, hypoxia and salinity changes may impair a copepod's ability to resist lowered pH.
Median Latitude: 58.265313 * Median Longitude: 11.478913 * South-bound Latitude: 58.263889 * West-bound Longitude: 11.477300 * North-bound Latitude: 58.268800 * East-bound Longitude: 11.479500
Date/Time Start: 2013-03-07T00:00:00 * Date/Time End: 2013-06-28T23:59:00
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