Distribution of standard lengths for the lake and stream habitat from wild caught adult individuals for each age class.

<p>No three-year-old stream fish were obtained. Significant size differences between habitats within an age class, based on Tukey’s HSD post hoc tests are indicated. Overall lake fish are significantly larger (<i>p<0.001</i>) when accounted for age.</p

Summary of stomach content data from wild caught adults.

<p>a) Percentage of planktonic prey in the stomachs of adult stickleback caught either at the lakeshore or stream habitat before the beginning of the breeding season (March 2009) and during the breeding season (July 2007). Indicated significances are based on post hoc <i>t</i> tests for a generalized linear model among sampling events (see text for details). b) Relative abundance of prey items in the stomach of all fish pooled per sampling event.</p

Summary of the increase in body size over time for experimental fish.

<p>(a) Illustration of the method used to estimate average family-based body size. A 1×1 mm grid was attached to the bottom of a standardized plastic container, where the water level was kept at 1.5 cm. Panels b and c show the average body size over time for lake and stream populations under either b) lake-like or c) stream-like food treatment. Dots represent the mean standard length (SL) of all families per source population (±1 SE).</p

Morphology

Geometric morphometric landmarks and linear measurements for experimental F1 threespine stickleback, their parents, wild type adults and young of the year individuals. Wild caught fish derive either from a lake or a stream site whereas experimental families were split and raised either under a benthic or limnetic diet

Lateral plate counts and EDA STN382 allel number

Individual based data providing the name of the lake sampled (Lake), an identifier for each individual (Individual), the number of later plates counted on the left side on the keel (Keel), the number of STN382 C alleles (STNallele), the total number of lateral plates counted on the left side (Total_Plates) and the assigned phenotypic morph (Morph). Plate morph abbreviations are as follow: LP - low plated with 10 or less anterior plates, LPK - as LP but with plates on the keel, PPNK - partial plated, i.e. having > 10 plates but no plates on the keel, PPK - as PPNK but with plates on the keel, FP - fully plated with plates continuously along the left sid

AFLP data

The file contains the internal code followed by the site abbreviation following table 1. All 481 AFLP loci are given

aflp.txt

The file contains the internal code followed by the site abbreviation following table 1. All 481 AFLP loci are given

Swiss Stn381 survey

The file contains the internal sample code, the population site abbreviated as in table 1 and the STN381 loci for each individual

Morphological & genetic data for threespine sticklebacks from Switzerland and Iceland

Morphological & genetic data for threespine sticklebacks from Switzerland and Icelan

MbipiaPundamilia_M4

MbipiaPundamilia_M