Data provided by National Oceanic and Atmospheric Administration
Rising atmospheric concentrations of CO2 are predicted to decrease the pH of high-latitude oceans by 0.3–0.5 units by 2100. Because of their limited capacity for ion exchange, embryos and larvae of marine fishes are predicted to be more sensitive to elevated CO2 than juveniles and adults. Eggs and larvae of walleye pollock (Theragra chalcogramma) were incubated across a broad range of CO2 levels (280–2100 matm) to evaluate sensitivity in this critical resource species. Slightly elevated CO2 levels ( 450 matm) resulted in earlier hatching times, but differences among egg batches were greater than those observed across CO2 treatments. Egg batches differed significantly in size-at-hatch metrics, but we observed no consistent effect of CO2 level. In three independent experiments, walleye pollock were reared at ambient and elevated CO2 levels through the early larval stage (to 30 days post-hatch). Across trials, there were only minor effects of CO2 level on size and growth rate, but fish in the ambient treatments tended to be slightly smaller than fish reared at elevated CO2 levels. These results suggest that growth potential of early life stages of walleye pollock is resilient with respect to the direct physiological effects of ocean acidification.
About this Dataset
Updated: 2025-04-21
Metadata Last Updated:
2025-11-14T15:15:06.815Z
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| Title | Effects of Ocean Acidification on Phytoplankton Physiology and Nutrition for Fishery-based Food Webs |
|---|---|
| Description | Rising atmospheric concentrations of CO2 are predicted to decrease the pH of high-latitude oceans by 0.3–0.5 units by 2100. Because of their limited capacity for ion exchange, embryos and larvae of marine fishes are predicted to be more sensitive to elevated CO2 than juveniles and adults. Eggs and larvae of walleye pollock (Theragra chalcogramma) were incubated across a broad range of CO2 levels (280–2100 matm) to evaluate sensitivity in this critical resource species. Slightly elevated CO2 levels ( 450 matm) resulted in earlier hatching times, but differences among egg batches were greater than those observed across CO2 treatments. Egg batches differed significantly in size-at-hatch metrics, but we observed no consistent effect of CO2 level. In three independent experiments, walleye pollock were reared at ambient and elevated CO2 levels through the early larval stage (to 30 days post-hatch). Across trials, there were only minor effects of CO2 level on size and growth rate, but fish in the ambient treatments tended to be slightly smaller than fish reared at elevated CO2 levels. These results suggest that growth potential of early life stages of walleye pollock is resilient with respect to the direct physiological effects of ocean acidification. |
| Modified | 2025-11-14T15:15:06.815Z |
| Publisher Name | N/A |
| Contact | N/A |
| Keywords | biological laboratory experiments , dissolved inorganic carbon (DIC) , fatty acids , growth rate , lipids , nitrate+nitrite , nitrogen particulate , partial pressure of carbon dioxide water , particulate carbon , particulate phosphorus , phosphate , silica species identication-count , total alkalinity(TA) , continuous , Northeast Atlantic , laboratory experiments , phytoplankton , DOC/NOAA/NMFS/NEFSC > Northeast Fisheries Science Center, National Marine Fisheries Service, NOAA, U.S. Department of Commerce , Aquaculture Sustainability Branch (ASB) , oceans |
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