Data from: Phenotypic and genetic divergence within a single whitefish form – detecting the potential for future divergence
Hirsch, Philipp Emanuel, University of Basel
Eckmann, Reiner, University of Konstanz
Oppelt, Claus, University of Konstanz
Behrmann-Godel, Jasminca, University of Konstanz
Published Jun 21, 2013 on Dryad.
Cite this dataset
Hirsch, Philipp Emanuel; Eckmann, Reiner; Oppelt, Claus; Behrmann-Godel, Jasminca (2013). Data from: Phenotypic and genetic divergence within a single whitefish form – detecting the potential for future divergence [Dataset]. Dryad. https://doi.org/10.5061/dryad.m9s46
Human-induced nutrient input can change the selection regime and lead to the loss of biodiversity. For example, eutrophication caused speciation reversal in polymorphic whitefish populations through a flattening of littoral-pelagic selection gradients. We investigated the current state of phenotypic and genetic diversity in whitefish (Coregonus macrophthalmus) in a newly restored lake whose nutrient load has returned to pre-eutrophication levels and found that whitefish spawning at different depths varied phenotypically and genetically: individuals spawning at shallower depth had fewer gill rakers, faster growth, and a morphology adapted to benthic-feeding and they showed higher degrees of diet specialization than deeper spawning individuals. Microsatellite analyses complemented the phenotype analyses by demonstrating reproductive isolation along different spawning depths. Our results indicate that whitefish still retain or currently re-gain phenotypic and genetic diversity, which was lost during eutrophication. Hence, the population documented here has a potential for future divergence because natural selection can target phenotypes specialized along re-established littoral-pelagic selection gradients. The biodiversity however, will have better chances to return if managers acknowledge the evolutionary potential within the local whitefish and adapt fishing and stocking measures.
basic data and stable isotope data of gangfisch (Coregonus macrophthalmus) caught at different depths in Lake Constance
Fish (n=30 each) were collected in the field using gill nets set at three different depths, 2, 25 and 50m. C13 and N15 are stable isotope data δC13 and δN15. ID=indivdiual ID; TL = fish total length; SL = fish standard length; sex (f=female, m=male); GR=gill raker counts; age= fish age in years
basic data and stable isotope data.txt
morphological measurements of Coregounus macrophthalmus from Lake Constance caught at different depths
Individual landmark coordinates calculated using the software TPSDIG
landmark coordinates from TPSDIG.txt
microsatellite data for Coregouns macrophthalmus caught at different depths in Lake Constance
Raw data of 12 microsatellite loci used for genetic analysis of C. macrophthalmus caught at 3 different depths (2,5 and 50m) in Lake Constance. given are locus names and fragment sizes of individual microsatellite alleles in bp created with Genemapper.