Description Usage Format Source References See Also Examples
Raw data from the Martin (2012) study on morphological selection in Cameroon crater lake cichlids. These data were downloaded from Dryad and then formatted for use in this R package. CichlidEjagham
is a subset of the Martin (2012) data that includes the fish from the Ejagham lake, and contains the following variables:
w
relative fitness, based on relative growth rates averaged from multiple measurements of the spacing between scale circuli of fishes from Ejagham.
W
absolute fitness, based on relative growth rates averaged from multiple measurements of the spacing between scale circuli of fishes from Ejagham.
ascendingProcess_cm
distance "from the dorsal tip of the ascending process of the premaxilla to the tip of the most anterior tooth on the dentigerous arm of the premaxilla" (in centimeters).
bodyDepth_cm
the distance "from the insertion of the first dorsal fin ray to the ventral surface, perpendicular to the major axis of the fish" (in centimeters).
orbitDiameter_cm
average of the diameters of the orbit (eye socket), taken from the horizontal and vertical axes of the fish (in centimeters).
headDepth_cm
distance "from the insertion of the epaxial muscle on the dorsal surface of the neurocranium to the ventral surface, perpendicular to the major axis of the fish" (in centimeters).
jawLength_cm
distance "from the center of the protruding quadrate-articular joint on the external jaw line to the tip of the most anterior tooth on the mandible" (in centimeters).
rowID
integer to identify the row number for each observation.
fishID
individual identification number for each fish.
lake
lake that the fish were collected from.
speciesDiagnosticColoration
assignment of species based on species-diagnostic-melanin-coloration. Individuals that could not be accurately identified to species were labeled as "ambiguous".
1 |
data.frame with 523 observations and 11 variables
These data were obtained from the "fitness dataset" tab of the "Complete Dataset" Excel spreadsheet that is available on Dryad: http://datadryad.org/resource/doi:10.5061/dryad.rn30d, and are associated with Martin (2012).
Martin CH. 2012. Weak disruptive selection and incomplete phenotypic divergence in two classic examples of sympatric speciation: Cameroon crater lake cichlids. American Naturalist 180:E90-109. http://dx.doi.org/10.1086/667586
1 2 3 4 5 6 7 8 | # Load the data
data(CichlidEjagham)
# Look at the structure of the data.frame
str(CichlidEjagham)
# Run a linear regression with w as the response and the morphological traits as the predictors
lm(w ~ ., data=CichlidEjagham[,1:5])
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