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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):
Copano_Bay * Latitude: 28.000000 * Longitude: -97.000000 * Method/Device: Biological sample (BIOS) * Comment: Spring 2014 and 2017
Parameter(s):
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
DATE/TIMEDate/TimeScherer, Avery ETrawl survey by Texas Parks and Wildlife Department (spring of 2014 or 2017)Geocode – Year collected
CommentCommentScherer, Avery ESeparator: in 2017, two researchers separated somatic from reproductive soft tissue, AS = Avery Scherer and MD = Meredith Diskin
PercentagePerc%Scherer, Avery EPercent 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
Somatic tissue, massSom tissgScherer, Avery EWeight of nonreproductive soft tissue
Transformed valueTransformedScherer, Avery ETransformed somatic: somatic tissue weight data ^ 0.25 to conform to assumptions of linearity regarding its relationship with cross sectional area
Residual valueResidualScherer, Avery ESomatic residuals: residuals from the linear relationship between transformed somatic tissue and cross sectional area
Standardized valueStandardizedScherer, Avery EStandardized somatic: size adjusted somatic tissue data, calculated as the linear relationship between transformed somatic tissue and mean cross sectional area +/- somatic residuals
Gonad tissue, massGon tissgScherer, Avery EWeight of gonad tissue
Gonad indexGon tiss / Som tissScherer, Avery EGonad index (GI): index of gonad investment calculated as gonad tissue weight / somatic tissue weight
10 Transformed valueTransformedScherer, Avery ETransformed GI: GI data ^ 0.75 to conform to assumptions of linearity regarding its relationship with cross sectional area
11 Residual valueResidualScherer, Avery EGI residuals: residuals from the linear relationship between transformedGI and cross sectional area
12 Standardized valueStandardizedScherer, Avery EStandardized GI: size adjusted GI data, calculated as the linear relationship between transformed GI and mean cross sectional area +/- gonad residuals
13 Shell thicknessShell thickmmScherer, Avery EShell thickness (mm): oyster shell thickness calculated as shell volume (measured using water displacement) / shell cross sectional area
14 Transformed valueTransformedScherer, Avery ETransformed thickness: shell thickness data ^ 0.5 to conform to assumptions of linearity regarding its relationship with cross sectional area
15 Residual valueResidualScherer, Avery EThickness residuals: residuals from the linear relationship between transformed thickness and cross sectional area
16 Standardized valueStandardizedScherer, Avery EStandardized thickness: size adjusted thickness data, calculated as the linear relationship between transformed thickness and mean cross sectional area +/- thickness residuals
17 Density, shellDens shellg/cm3Scherer, Avery EOyster shell density calculated as shell weight / shell volume (measured using water displacement)
18 Cross sectional area, shellCSA shellmm2Scherer, Avery ECross sectional area of oyster shells, calcuated as an average area measured using ImageJ analysis of photos of shell inner and outer surfaces
Size:
1925 data points

Data

Download dataset as tab-delimited text — use the following character encoding:


Date/Time
(Year collected)

Comment
(Separator: in 2017, two resea...)

Perc [%]
(Percent Spawned: oysters were...)

Som tiss [g]
(Weight of nonreproductive sof...)

Transformed
(Transformed somatic: somatic ...)

Residual
(Somatic residuals: residuals ...)

Standardized
(Standardized somatic: size ad...)

Gon tiss [g]
(Weight of gonad tissue)

Gon tiss / Som tiss
(Gonad index (GI): index of go...)
10 
Transformed
(Transformed GI: GI data ^ 0.7...)
11 
Residual
(GI residuals: residuals from ...)
12 
Standardized
(Standardized GI: size adjuste...)
13 
Shell thick [mm]
(Shell thickness (mm): oyster ...)
14 
Transformed
(Transformed thickness: shell ...)
15 
Residual
(Thickness residuals: residual...)
16 
Standardized
(Standardized thickness: size ...)
17 
Dens shell [g/cm3]
(Oyster shell density calculat...)
18 
CSA shell [mm2]
(Cross sectional area of oyste...)
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