The impact of ocean acidification on the early life stages of surf clams and the interactive effects of feeding and temperature from laboratory experiment studies from 2011-07-12 to 2012-06-17 (NCEI Accession 0123314)
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This dataset contains laboratory experiment data that were collected to examine the effects of ocean acidification on the Atlantic surfclam, Spisula solidissima, a species worth $31 million in 2009. Ocean acidification has negatively impacted growth and survival of multiple bivalve species, but because each species and developmental stage can show different responses, these studies were designed to determine potential impacts of increased CO2 on the larvae of the commercially important surfclam. Additionally, the role of nutrition (i.e., phytoplankton concentration) was included in a portion of these experiments because food availability may be able to mitigate the stress of ocean acidification and because ocean acidification has the potential to impact marine phytoplankton communities. During the summer of 2011, three different experiments were conducted at Woods Hole Oceanographic Institution examining the effects of three different pCO2 concentrations on larval surf clams. Two short term experiments (~70h) examined the effect of food availability on early shell development (fed vs unfed). One long term experiment (~21d) was conducted to examine the effects of pCO2 on shell development and metamorphic success (all animals well fed). Carbonate data is reported from these preliminary short-term experiments, and survival and shell length data is reported, in addition to carbonate data, from the long-term experiment. During 2012, one 6 day experiment was conducted examining the role and potential interactive effects of high and low food availability (400 and 40,000 cells ml-1 Tiso) and differential CO2 concentrations (ambient, ~1200 ppm and ~2200ppm). From these experiments, carbonate data, shell length, mass and biochemical compositions are reported. In 2013, two additional experiments were conducted to confirm results obtained in 2012. Unfortunately we observed stunted larval growth, no feeding effect on growth, high mortalities and a general failure to thrive. Given this, we infer poor gamete quality may have been the cause, and have chosen not to interpret these data as results are suspect. Therefore, 2013 data are therefore not included in this data submission.
Laboratory carbon dioxide exposure experiments measuring scope for growth for juvenile Atlantic sea scallops (Placopecten magellanicus) from 2019-10-23 to 2019-12-19 (NCEI Accession 0276024)
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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.
Shrimp catch and bycatch estimates from trawling and trapping in Clio Channel, British Columbia
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These data sets provide information pertaining to shrimp and bycatch estimates associated with beam-trawling and trapping (2001-2002) in Clio Channel. Data sets were compiled and formatted by Meagan Mak. Abstract from report: As part of a project investigating possible modification of marine ecosystems by shrimp trawling and trapping, we enumerated beam trawl and prawn trap catches at two locations in Clio Channel, south -central coast of British Columbia. Beam trawl surveys were conducted in Bones Bay and Turnour Bay during October 2001 and January 2002, respectively, and a prawn trap survey was conducted in Turnour Bay during March 2002. Catch data from the two gear types are presented.
Likelihood of Presence of Soft Shelled Clams in Area Response Planning Pilot Areas
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Likelihood of Presence of Soft Shelled Clams in the Bay of Fundy and Port Hawkesbury Area Response Plan. The Coastal Oceanography and Ecosystem Research section (DFO Science) reviewed reported Clam harvest and study areas as well utilized local knowledge of the areas to estimate clam flats. A version of this dataset was created for the National Environmental Emergency Center (NEEC) following their data model and is available for download in the Resources section. Cite this data as: Lazin, G., Hamer, A.,Corrigan, S., Bower, B., and Harvey, C. Data of: Likelihood of presence of Soft Shelled Clam in Area Response Planning pilot areas. Published: June 2018. Coastal Ecosystems Science Division, Fisheries and Oceans Canada, St. Andrews, N.B. https://open.canada.ca/data/en/dataset/59121e8f-0acc-411a-99cb-54980df10ba6
Biological effects of ocean acidification on juvenile Atlantic surfclams (Spisula solidissima) observed in laboratory experiments from 2019-04-10 to 2019-07-03 (NCEI Accession 0245952)
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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.
Aquafin CRC Salmon Project - Process Study 4 - Water Column Spatial Survey - Port Esperance - November 2007
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Process Study 4 was undertaken in Port Esperance on 01 November 2007. During the spatial survey samples were collected from eight sites for the analysis of nutrients, phytoplankton species identification, chlorophyll and carotenoid pigments and the absorption coefficient for the dissolved (CDOM) component of the water column. Three depths were sampled (0, 3 and 2 m from the bottom) for the nutrient analyses, a surface sample was collected for the CDOM analysis and a 12 m integrated water column sample was collected for the pigment analysis and phytoplankton species identification. At each site prior to the collection of the samples a CTD profile to near bottom was collected and the Secchi depth measured. A further sample was collected, using a bucket, from near the bridge at Port Esperance and analysed for salinity, CDOM absorption and nutrient concentration. PLEASE NOTE - The phytoplankton results were updated in June 2012 with a correction. The original biovolume unit in column L and M was incorrect and should have been µL/L. The values in column M and L have been divided by 1000 and the unit mL/L left unchanged. Other values are not affected including CPL and Group CPL.