DOI: 10.5061/dryad.q7k8j
title: Data from: Heritable differences in fitness-related traits among populations of the mustard hill coral, Porites astreoides

description: A population’s potential for rapid evolutionary adaptation can be
 estimated from the amount of genetic variation in fitness-related traits.
 Inshore populations of the mustard hill coral (Porites astreoides) have
 been shown to be more tolerant to thermal stress than offshore
 populations, but it is unclear whether this difference is due to long-term
 physiological acclimatization or genetic adaptation. Here, we evaluated
 variation in growth rate and survival among 38 families of juvenile
 recruits of P. astreoides spawned by colonies originating from inshore and
 offshore locations. Recruits were reared in a common garden for 5 weeks
 and then subjected to two thermal treatments (28  and 31 °C) for 2.5
 weeks. The most significant effects were detected during the first 5
 weeks, before thermal stress was applied: 27–30% of variance in growth and
 94% of variance in recruit survival was attributable to parental effects.
 Genotyping of eight microsatellite loci indicated that the high early
 mortality of some of the recruit families was not due to higher
 inbreeding. Post treatment, parental effects diminished such that only
 10–15% of variance in growth rate was explained, which most likely
 reflects the dissipation of maternal effects. However, offshore-origin
 recruits still grew significantly less under elevated temperature compared
 with inshore-origin recruits. These differences observed in naive juvenile
 corals suggest that population-level variation in fitness in response to
 different thermal environments has a genetic basis and could represent raw
 material for natural selection in times of climate change.
description: R script for statistical
 analyses and associated input filesThis compressed file
 contains an annotated R script for all statistical analyses described in
 the publication (including linear models, heritability estimation, Fis
 analysis and associated figures) and associated input files in csv format.
 Input files listing coral growth and survival were derived from raw
 photographs which are also included in this archive
 submission.Ranalysis_InputFiles.zipCoral Recruits on Tiles: 25 April 2012This file contains post-rearing period photographs of coral recruits by tile. Raw photographs are in .jpg format named by family (1-50). The associated .tif images show how recruit area was obtained and indicate which treatment (C:control, H:Heat) the tile was subsequently assigned to. The .xls data files contain the raw area measures that were subsequently combined to calculate change in recruit growth in the .csv data file contained in the R statistical file.Photographs_4_25_12.zipCoral Recruits on Tiles: 28 May 2012This file contains initial photographs of coral recruits by tile. Raw photographs are in .jpg format named by family (1-50). The associated .tif images show how recruit area was obtained and indicate which treatment (C:control, H:Heat) the tile was subsequently assigned to. The .xls data files contain the raw area measures that were subsequently combined to calculate change in recruit growth in the .csv data file contained in the R statistical file.Photographs_5_28_12.zipCoral Recruits on Tiles: 13 June 2012This file contains final photographs of coral recruits by tile. Raw photographs are in .jpg format named by family (1-50). The associated .tif images show how recruit area was obtained and indicate which treatment (C:control, H:Heat) and experimental tank the tile was assigned to. The .xls data files contain the raw area measures that were subsequently combined to calculate change in recruit growth in the .csv data file contained in the R statistical file.Photographs_6_13_12.zip