期刊
MARINE ENVIRONMENTAL RESEARCH
卷 153, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.marenvres.2019.104841
关键词
Global change; Water chemistry; Ocean acidification; Asteroidea; Growth; Regeneration; Righting time response
资金
- Sao Paulo Research Foundation (FAPESP) [2013/50197-5, 2014/12879-0, 2015/02727-0]
- National Council for Scientific and Technological Development (CNPq) [309697/2015-8]
- Natural Environment Research Council [NE/J007544/1] Funding Source: researchfish
- NERC [NE/J007544/1] Funding Source: UKRI
The impacts of ocean acidification remain less well-studied in starfish compared to other echinoderm groups. This study examined the combined effects of elevated pCO(2) and arm regeneration on the performance of the intertidal predatory starfish Asterias rubens, as both are predicted to come at a cost to the individual. A two-way factorial experiment (similar to 400 mu atm vs similar to 1000 mu atm; autotomised vs non-automised individuals) was used to examine growth rates, lipid content (pyloric caeca and gonads), and calcium content (body wall) in both intact and regenerating arms, as well as subsequent effects on rate of arm regeneration, righting time (behaviour) and mortality over 120 days. Autotomised individuals tended to show lower (not significant), survival and growth. Elevated pCO(2) had no effect on mortality, body growth, arm regeneration, righting time or arm calcium content. Lipid content was higher in the pyloric caeca, but not in the gonads, in response to elevated pCO(2) irrespective of autotomisation. The results of the study suggest that adult A. rubens remain unaffected by increased pCO(2) and/or arm autotomy for 120 days, although longer term experiments are necessary as the results indicated that survival, growth and calcification may be impaired with longer-term exposure to elevated pCO(2).
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