DOI: 10.5061/dryad.gr6t5
title: Data from: Testing for local adaptation to spawning habitat in sympatric subpopulations of pike by reciprocal translocation of embryos

description: We tested for local adaption in early life-history traits by performing a
 reciprocal translocation experiment with approximately 2,500 embryos of
 pike (Esox lucius) divided in paired split-family batches. The experiment
 indicated local adaptation in one of the two subpopulations manifested as
 enhanced hatching success of eggs in the native habitat, both when
 compared to siblings transferred to a non-native habitat, and when
 compared to immigrant genotypes from the other subpopulation.
 Gene-by-environment effects on viability of eggs and larvae were evident
 in both subpopulations, showing that there existed genetic variation
 allowing for evolutionary responses to divergent selection, and indicating
 a capacity for plastic responses to environmental change. Next, we tested
 for differences in female life-history traits. Results uncovered that
 females from one population invested more resources into reproduction and
 also produced more (but smaller) eggs in relation to their body size
 compared to females from the other population. We suggest that these
 females have adjusted their reproductive strategies as a
 counter-adaptation because a high amount of sedimentation on the eggs in
 that subpopulations spawning habitat might benefit smaller eggs.
 Collectively, our findings point to adaptive divergence among sympatric
 subpopulations that are physically separated only for a short period
 during reproduction and early development—which is rare. These results
 illustrate how combinations of translocation experiments and field studies
 of life-history traits might infer about local adaptation and evolutionary
 divergence among populations. Local adaptations in subdivided populations
 are important to consider in management and conservation of biodiversity,
 because they may otherwise be negatively affected by harvesting,
 supplementation, and reintroduction efforts targeted at endangered
 populations.
description: Reciprocal translocation
 experimentData from a reciprocal
 translocation experiment on hatching success and viability of hatched
 larvae through the yolk sac phase for pike eggs that were artificially
 fertilized and then reared in cages using a split-brood design such that
 half were planted at ’home’ in their native and half were transplanted and
 reared ’away’ in a foreign spawning habitat. Data is provided for 2466
 individual eggs that were produced by females representing two different
 subpopulations from the Baltic Sea. The file includes information on
 population origin, spawning habitat location, family ID, translocation
 treatment, hatching status, and survival.Data, PONE-2016, from
 reciprocal translocation experiment of
 pike.xlsxData on female
 reproductive investment in pike from two subpopulationsData on body size and
 reproductive investment for 46 female pike from two anadromous populations
 in the Baltic Sea. The file includes information on population, fish ID,
 date of capture, body length, somatic mass, egg mass, and gonad dry
 mass.Data
 on female reproductive investment in pike from two
 populations.xlsx