Scherer, Avery E; Bird, Christopher E; McCutcheon, Melissa R; Hu, Xinping; Smee, Delbert L (2018): (Experiment 2) Shell (density, thickness) and soft tissue (somatic tissue weight, gonad index) metrics for eastern oysters Crassostrea virginica reared under variable predation conditions (S. Texas, 2013-14) [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.892089, In supplement to: Scherer, AE et al. (2018): Two-tiered defense strategy may compensate for predator avoidance costs of an ecosystem engineer. Marine Biology, 165(8), 131, https://doi.org/10.1007/s00227-018-3391-2
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Coverage:
Latitude: 28.000000 * Longitude: -97.000000
Date/Time Start: 2014-03-01T00:00:00 * Date/Time End: 2017-03-01T00:00:00
Event(s):
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DATE/TIME | Date/Time | Scherer, Avery E | Trawl survey by Texas Parks and Wildlife Department (spring of 2014 or 2017) | Geocode – Year collected | |
| 2 | Comment | Comment | Scherer, Avery E | Separator: in 2017, two researchers separated somatic from reproductive soft tissue, AS = Avery Scherer and MD = Meredith Diskin | ||
| 3 | Percentage | Perc | % | Scherer, Avery E | Percent Spawned: oysters were categorized according to their release of gametes; oysters which had not begun to release gametes were classified as 0% spawned, oysters which had initiated gamete release but which had not released >25% of gametes were classified as 25% released; oysters which had released >25% of gametes were excluded from the study | |
| 4 | Somatic tissue, mass | Som tiss | g | Scherer, Avery E | Weight of nonreproductive soft tissue | |
| 5 | Transformed value | Transformed | Scherer, Avery E | Transformed somatic: somatic tissue weight data ^ 0.25 to conform to assumptions of linearity regarding its relationship with cross sectional area | ||
| 6 | Residual value | Residual | Scherer, Avery E | Somatic residuals: residuals from the linear relationship between transformed somatic tissue and cross sectional area | ||
| 7 | Standardized value | Standardized | Scherer, Avery E | Standardized somatic: size adjusted somatic tissue data, calculated as the linear relationship between transformed somatic tissue and mean cross sectional area +/- somatic residuals | ||
| 8 | Gonad tissue, mass | Gon tiss | g | Scherer, Avery E | Weight of gonad tissue | |
| 9 | Gonad index | Gon tiss / Som tiss | Scherer, Avery E | Gonad index (GI): index of gonad investment calculated as gonad tissue weight / somatic tissue weight | ||
| 10 | Transformed value | Transformed | Scherer, Avery E | Transformed GI: GI data ^ 0.75 to conform to assumptions of linearity regarding its relationship with cross sectional area | ||
| 11 | Residual value | Residual | Scherer, Avery E | GI residuals: residuals from the linear relationship between transformedGI and cross sectional area | ||
| 12 | Standardized value | Standardized | Scherer, Avery E | Standardized GI: size adjusted GI data, calculated as the linear relationship between transformed GI and mean cross sectional area +/- gonad residuals | ||
| 13 | Shell thickness | Shell thick | mm | Scherer, Avery E | Shell thickness (mm): oyster shell thickness calculated as shell volume (measured using water displacement) / shell cross sectional area | |
| 14 | Transformed value | Transformed | Scherer, Avery E | Transformed thickness: shell thickness data ^ 0.5 to conform to assumptions of linearity regarding its relationship with cross sectional area | ||
| 15 | Residual value | Residual | Scherer, Avery E | Thickness residuals: residuals from the linear relationship between transformed thickness and cross sectional area | ||
| 16 | Standardized value | Standardized | Scherer, Avery E | Standardized thickness: size adjusted thickness data, calculated as the linear relationship between transformed thickness and mean cross sectional area +/- thickness residuals | ||
| 17 | Density, shell | Dens shell | g/cm3 | Scherer, Avery E | Oyster shell density calculated as shell weight / shell volume (measured using water displacement) | |
| 18 | Cross sectional area, shell | CSA shell | mm2 | Scherer, Avery E | Cross sectional area of oyster shells, calcuated as an average area measured using ImageJ analysis of photos of shell inner and outer surfaces |
License:
Creative Commons Attribution-NonCommercial-ShareAlike 3.0 Unported (CC-BY-NC-SA-3.0)
Size:
1925 data points