DOI: 10.5061/dryad.2c6951v
title: Data from: Adaptations of early development to local spawning temperature in anadromous populations of pike (Esox lucius)

description: Background: In the wake of climate change many environments will be
 exposed to increased and more variable temperatures. Knowledge about how
 species and populations respond to altered temperature regimes is
 therefore important to improve projections of how ecosystems will be
 affected by global warming, and to aid management. We conducted a common
 garden, split-brood temperature gradient (4.5 °C, 9.7 °C and 12.3 °C)
 experiment to study the effects of temperature in two populations (10
 families from each population) of anadromous pike (Esox lucius) that
 normally experience different temperatures during spawning. Four offspring
 performance measures (hatching success, day degrees until hatching, fry
 survival, and fry body length) were compared between populations and among
 families. Results: Temperature affected all performance measures in a
 population-specific manner. Low temperature had a positive effect on the
 Harfjärden population and a negative effect on the Lervik population.
 Further, the effects of temperature differed among families within
 populations. Conclusions: The population-specific responses to temperature
 indicate genetic differentiation in developmental plasticity between
 populations, and may reflect an adaptation to low temperature during early
 fry development in Harfjärden, where the stream leading up to the wetland
 dries out relatively early in the spring, forcing individuals to spawn
 early. The family-specific responses to temperature treatment indicate
 presence of genetic variation for developmental plasticity (G x E) within
 both populations. Protecting between- and within-population genetic
 variation for developmental plasticity and high temperature-related
 adaptive potential of early life history traits will be key to long-term
 viability and persistence in the face of continued climate change.
description: performance.xlsxData obtained from a common garden temperature gradient experiment with two subpopulations of anadromous pike (Esox lucius) from the Baltic Sea. In the experiment, eggs were artificially fertilized, and a split-brood design with three different temperature treatments was used to test for effects of temperature during early fry development. Four offspring performance measures (hatching success, fry survival during the first 5 days, day degrees until hatching, and fry body length 5 days post hatch) were quantified. Data on hatching success and fry survival is presented in ‘performance.xlsx’, data on day degrees until hatching in ‘daydegrees.xlsx’, and data on fry body length in ‘lengths.xlsx’.daydegrees.xlsxData obtained from a common garden temperature gradient experiment with two subpopulations of anadromous pike (Esox lucius) from the Baltic Sea. In the experiment, eggs were artificially fertilized, and a split-brood design with three different temperature treatments was used to test for effects of temperature during early fry development. Four offspring performance measures (hatching success, fry survival during the first 5 days, day degrees until hatching, and fry body length 5 days post hatch) were quantified. Data on hatching success and fry survival is presented in ‘performance.xlsx’, data on day degrees until hatching in ‘daydegrees.xlsx’, and data on fry body length in ‘lengths.xlsx’.lengths.xlsxData obtained from a common garden temperature gradient experiment with two subpopulations of anadromous pike (Esox lucius) from the Baltic Sea. In the experiment, eggs were artificially fertilized, and a split-brood design with three different temperature treatments was used to test for effects of temperature during early fry development. Four offspring performance measures (hatching success, fry survival during the first 5 days, day degrees until hatching, and fry body length 5 days post hatch) were quantified. Data on hatching success and fry survival is presented in ‘performance.xlsx’, data on day degrees until hatching in ‘daydegrees.xlsx’, and data on fry body length in ‘lengths.xlsx’.