LarvalSquirtsHD: Larvae of sea squirts (_Styela plicata_) in high density
In MorphoFun/psa: Phenotypic Selection Analysis tools

Description Usage Format Source References See Also Examples

Raw data from the Crean et al. (2011) study on phenotypic selection across the metamorphic boundary in Styela plicata larvae. These data were downloaded from Dryad and then formatted for use in this R package. LarvalSquirtsHD includes the data from the high density treatment, and consists of the following variables:

wr: relative fitness based on postmetamorphic survival to reproduction after 4 months in the field (survivalToReprod) for larvae in the high density treatment.
ws: relative fitness based on postmetamorphic growth, using wet weight (in grams) after 4 months in the field as a proxy (wetWeight4months.g) for larvae in the high density treatment.
Wr: absolute fitness based on postmetamorphic survival to reproduction after 4 months in the field (survivalToReprod) for larvae in the high density treatment. 1 = survived, 0 = died.
Ws: absolute fitness based on postmetamorphic growth, using wet weight (in grams) after 4 months in the field as a proxy (wetWeight4months.g) for larvae in the high density treatment.
larvalArea_um2: area of the larva, "estimated from the average of at least three measurements", in units of squared micrometers.
hatchTime_mins: time to hatching, a premetamorphic trait used as a proxy for development time, in units of minutes.
settleTime_mins: time to settlement, a premetamorphic trait measured every 4 hours, in units of minutes. "Larvae that had not settled within 25 hours posthatch were excluded from their analyses (n = 3)".
trial: one of five replicate runs ("trials") that were run betwen May and October 2009.
individual: individual identification code.
treatment: experimental treatment group (LD = low density, HD = high density).

1	LarvalSquirtsHD

data.frame with 83 observations and 10 variables

These data were obtained from the Excel spreadsheet that is available on Dryad: http://datadryad.org/resource/doi:10.5061/dryad.574r7, and are associated with Crean et al. (2011).

Crean AJ, Monro K, Marshall DJ. 2011. Fitness consequences of larval traits persist across the metamorphic boundary. Evolution 65(11): 3079-3089. doi:10.1111/j.1558-5646.2011.01372.x

LarvalSquirts, LarvalSquirtsLD

# Load the data
data(LarvalSquirtsHD)

# Look at the structure of the data.frame
str(LarvalSquirtsHD)

# Run a linear regression with wr as the response and the phenotypic traits as the predictors
lm(wr ~ ., data = LarvalSquirtsHD[,5:7])