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• W2489401685 abstract "MEPS Marine Ecology Progress Series Contact the journal Facebook Twitter RSS Mailing List Subscribe to our mailing list via Mailchimp HomeLatest VolumeAbout the JournalEditorsTheme Sections MEPS 557:189-206 (2016) - DOI: https://doi.org/10.3354/meps11868 Carry-over effects of ocean acidification in a cold‑water lecithotrophic holothuroid Katie Verkaik1, Jean-François Hamel2, Annie Mercier1,* 1Department of Ocean Sciences, Memorial University, St John’s, Newfoundland and Labrador, A1C 5S7 Canada 2Society for the Exploration & Valuing of the Environment (SEVE), St Philips, Newfoundland and Labrador, A1M 2B7 Canada *Corresponding author: amercier@mun.ca ABSTRACT: Ocean acidification (OA) due to anthropogenic CO2 emissions is predicted to affect the world’s oceans in the near future. To date, knowledge remains limited on the response of species that are weakly calcified, produce lecithotrophic (non-feeding) larvae and live in polar/subpolar environments. The cold-water sea cucumber Cucumaria frondosa represents an ideal model for such investigations. One of the most abundant echinoderms in the world, it is annually-spawning, slow-growing and has been commercially exploited in the North Atlantic for over 35 yr. The present study examined the effects of predicted near-future OA scenarios on gametogenesis, spawning and embryonic development of C. frondosa, as well as on processes that may compete or coincide with reproductive effort such as ossicle formation and lipid synthesis. Sea cucumbers were exposed to a 0.4 unit pH decrease over 19 wk using a fully open flow-through design allowing for natural fluctuations in pH, light, temperature, salinity and nutrient levels. There were 2 treatment groups, ambient pH (7.9–8.2; pCO2 430–470 µatm) and low pH (7.5–7.7; pCO2 1330–1530 µatm). Results indicate that low pH/high pCO2 interferes with gamete synthesis, leading to discrepancies in oocyte/embryo buoyancy and morphology and developmental tempo, translating into 100% mortality before the blastula stage. Differences in the microstructural appearance of ossicles and the lipid contents of muscles, gonads and spawned oocytes were also highlighted. Such findings draw attention to previously understudied impacts of OA, including transgenerational effects in cold-water species with maternally provisioned eggs, and the resulting implications for temperate, subpolar and polar ecosystems. KEY WORDS: Ocean acidification · pH · Sea cucumber · North Atlantic · Reproduction · Lecithotrophic development · Polar environments Full text in pdf format Supplementary material PreviousNextCite this article as: Verkaik K, Hamel JF, Mercier A (2016) Carry-over effects of ocean acidification in a cold‑water lecithotrophic holothuroid. Mar Ecol Prog Ser 557:189-206. https://doi.org/10.3354/meps11868 Export citation RSS - Facebook - Tweet - linkedIn Cited by Published in MEPS Vol. 557. Online publication date: September 28, 2016 Print ISSN: 0171-8630; Online ISSN: 1616-1599 Copyright © 2016 Inter-Research." @default.
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• W2489401685 title "Carry-over effects of ocean acidification in a cold‑water lecithotrophic holothuroid" @default.
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• W2489401685 doi "https://doi.org/10.3354/meps11868" @default.
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