The effects of food supply on bivalves under long-term ocean acidification exposure remains incompletely understood. In this study, juvenile northern bay scallops (50 days post fertilization), Argopecten irradians, that had been reared since 4 hours post-fertilization under one of two ocean acidification conditions (~500-600 or ~750-850 µatm pCO2; ~1.37-1.5 or ~1.0-1.2 Ωaragonite), were subjected to two food levels for 42-days (low food = ~400 and high food = ~1,400 chlorophyll cells mL-1). Standard metabolic rate (SMR) and clearance rate (CR) were measured at day 0 and standard metabolic rate, clearance rate, growth, and survivorship were measured at 14 and 42 days of exposure to two food levels for each of the ocean acidification treatments. This data archive contains (i) seawater carbonate chemistry and discrete seawater chemistry records throughout the experiment (ii) standard metabolic rates, (iii) clearance rates, (iv) survival, (v) shell length, (vi) shell and tissue dry weights ,(vii) and experiment metadata.

This dataset contains laboratory experimental data that were collected to examine the effects of elevated levels of carbon dioxide on the growth of Atlantic surfclam (Spisula solidissima), a species that supports both commercial and recreational fisheries in the Northeast United States. Three levels of carbon dioxide enrichment (low, medium, and high) were delivered to surfclams in a 12-week exposure experiment. All treatments were done in 3 replicates (A, B, C). Approximately every 2 to 3 weeks, 12 individuals were removed from each treatment and measurements of length, width, height, dry tissue, and dry shell were recorded. Length was measured across the longest part of the shell, parallel to the hinge. Width was the thickness of the shell, and height was measured form the hinge to the outer edge of the shell. Dry tissue and dry shell samples were dried at 60°C until constant weight was achieved (~5 days). DIC measurements of carbon dioxide enrichment were taken and analyzed on an Apollo SciTech, while pH was measured weekly with a spectrophotometer. Values reported for DIC, pH, temperature, and salinity are the mean of each treatment during the 12-week experiment. The data indicated that increased carbon dioxide affected growth, tissue mass, and shell weight for Atlantic surfclam.

This dataset contains the biological response for Atlantic sea scallops (Placopecten magellanicus) exposed to three different levels of carbon dioxide enrichment (low, medium, high). The experiment took place from October 23, 2019 to December 19, 2019 (8 weeks). Salinity, temperature, dissolved oxygen, dissolved inorganic carbon, pH, chlorophyll-a, and seston counts are reported for the seawater during the 8 week exposure. Physiological measurements (feeding, respiration, and excretion rates) were taken 4 times during the experiment at the following temperatures (13.1C, 9.4C, 7.4C, and 6.1C). For feeding rates, the clearance rate, organic ingestion rate, assimilation rate, and assimilation efficiency are reported. From the respiration rate and excretion rate the atomic oxygen to nitrogen ratio is also reported. Scope for growth (the amount of energy available to grow) is calculated from the assimilated energy minus the energy for catabolic processes. Growth parameters were also taken during the 8 week experiment every 2 weeks. For growth parameters, dry tissue weight, dry shell weight, length, width, and thickness are reported.

The effects of elevated levels of CO2 on black sea bass, especially during the early life stages when fish tend to be more sensitive to OA effects, was investigated. In this study, we exposed fertilized eggs to a range of CO2 levels (182.7 μatm- 2252.6 μatm) and measured % hatch, unhatch, and skeletal abnormalities after 48 hours of exposure. Adult male and female black sea bass were held in flowing seawater at ambient temperatures during the winters of 2012-2013, 2013-2014, and 2014-2015. Once fish came out of torpor, adults were fed squid during conditioning and spawning. Gamete development in fish occurred naturally and spawning took place in holding tanks in late July of all three years. Fertilized eggs were collected in screens placed at the seawater outflow and exposed to different levels of CO2.

This dataset contains laboratory experiment data that were collected to examine the effects of elevated levels of CO2 on the growth, survival, otolith (ear bone) condition and the skeleton of juvenile scup, Stenotomus chrysops, a species that supports both commercial and recreational fisheries. Increasing amounts of atmospheric carbon dioxide from human industrial activities are causing changes in global ocean carbon chemistry resulting in a reduction in pH, a process termed ocean acidification. Studies have demonstrated adverse effects on calcifying organisms, particularly some invertebrates, corals, sea urchins, pteropods, and coccolithophores. It is important to determine which species are sensitive to elevated levels of CO2 because of the potential impacts to ecosystems, marine resources, biodiversity, food webs, populations and effects on human communities and economies. There have been few studies examining the effects of ocean acidification on marine fish, particularly the juvenile stages of species that support important fisheries. These data demonstrated that elevated levels of pCO2 (>1300 micro-atm) had no statistically significant effect on growth, survival, or otolith condition after 8 weeks of rearing. There was a trend towards a greater gain in weight and length in scup exposed to the mid-level (1726 micro-atm) and the high level (2614 micro-atm) treatments of pCO2 when compared to the fish in the control (1205 micro-atm) treatments, but these differences were not statistically significant. X-ray analysis of the fish revealed a slightly higher incidence of hyper-ossification in the vertebrae of a few scup from the highest treatments compared to fish from the control treatments. The study's results show that juvenile scup are tolerant to increases in levels of environmental pCO2, possibly due to conditions this species encounters in their naturally variable environment.