Pupfish hybrid survival in two San Salvador lakes — crescent_pond

Laboratory-reared F2 hybrids of the three pupfish species of San Salvador Island, Bahamas, photographed, tagged and released into field enclosures in Crescent Pond and Little Lake from March to June 2011, with laboratory-reared fish of the three species measured the same way. Martin (2016) analysed the high-density enclosures, density == "H", as do the examples and the app.

Usage

crescent_pond_pupfish

little_lake_pupfish

Format

Data frames with 23 variables, 993 rows for Crescent Pond and 1062 for Little Lake:

lake: "CP" (Crescent Pond) or "LL" (Little Lake).
density: The enclosure of an F2 hybrid, "H" (high density) or "L" (low density), or the species of a parental fish: "norm", the generalist Cyprinodon variegatus; "bozo", the molluscivore C. brontotheroides; "bull", the scale-eater C. desquamator.
survival: 1 if the hybrid survived the three months in the enclosure, 0 otherwise; NA for parental fish.
ln.growth: Log growth rate of survivors over the three months. Hybrids that died are coded 0, so drop them before analysing growth; NA for parental fish.
color: Martin's plotting colour: orange for hybrids; blue, green and red for the generalist, molluscivore and scale-eater.
d13C, d15N: Carbon and nitrogen stable isotope ratios (per mil) of muscle from surviving hybrids; NA for the rest.
jaw: Lower jaw length, from the jaw joint to the tip of the dentary.
eye: Eye diameter, the mean of the major and minor axes of the iris (orbit diameter).
eye2: Eye roundness, the ratio of the major to the minor axis of the iris.
pmx: Craniofacial height, from the jaw joint to the tip of the premaxilla (upper jaw length).
snout: Lateral snout length, from the tip of the premaxilla to the front of the iris.
body: Dorsal to anal distance, between the first rays of the dorsal and anal fins (body depth).
caudal: Caudal peduncle height.
nasal: Dorsal snout length, from the front of the orbit to the tip of the maxilla in dorsal view.
mouth: Buccal width in dorsal view.
width: Head width across the opercula in dorsal view.
boteyeangle: Ventral orbit angle, at the tip of the premaxilla between the lower edge of the iris and the quadrate.
topeyeangle: Orbit angle, at the tip of the premaxilla between the upper and lower edges of the iris.
nose: Maxillary head protrusion (nasal protrusion).
noseangle: Maxillary head protrusion angle (nasal angle).
adduct: Preopercular height.
SL: Standard length.

An object of class data.frame with 1062 rows and 23 columns.

Source

Martin, C. H. (2016) Context dependence in complex adaptive landscapes: frequency and trait-dependent selection surfaces within an adaptive radiation of Caribbean pupfishes. Evolution 70, 1265-1282. doi:10.1111/evo.12932 . Data: doi:10.5061/dryad.n3mj3 .

Details

The trait columns are Martin's scores for the 16 measurements of Martin and Wainwright (2013), taken from the photographs. He log-transformed the distances, regressed each trait on a size index (the first principal component of seven size-related distances) and kept the residuals, fitting the regression to the parental fish alone for jaw, mouth, nasal and width; eye2, nose and noseangle were not size-corrected. Every trait is standardised to mean 0 and standard deviation 1 within each lake, hybrids and parental fish together.

The column names are Martin's. The trait names below are the ones defined in the supplement to Martin and Wainwright (2013), matched to the columns through his size-correction script (in the Dryad archive) and their discriminant loadings, with the name Martin (2016) uses in brackets where it differs. The six functional traits of his Table 3 are jaw, pmx, nose, noseangle, body and eye. Their loadings table swaps the labels of snout and nasal; the names here follow the size-correction script.

References

Martin, C. H. and Wainwright, P. C. (2013) Multiple fitness peaks on the adaptive landscape drive adaptive radiation in the wild. Science 339, 208-211. doi:10.1126/science.1227710 .