Data from: Increases in the mean and variability of thermal regimes result in differential phenotypic responses among genotypes during early ontogenetic stages of lake sturgeon (Acipenser fulvescens)

Dammerman, Kari J., Michigan State University, United States Fish and Wildlife Service

Steibel, Juan P., Michigan State University

Scribner, Kim T., Michigan State University

Published Jul 15, 2016 on Dryad. https://doi.org/10.5061/dryad.pq35t

Cite this dataset

Dammerman, Kari J.; Steibel, Juan P.; Scribner, Kim T. (2016). Data from: Increases in the mean and variability of thermal regimes result in differential phenotypic responses among genotypes during early ontogenetic stages of lake sturgeon (Acipenser fulvescens) [Dataset]. Dryad. https://doi.org/10.5061/dryad.pq35t

Abstract

Climate change is affecting thermal conditions worldwide. Understanding organismal responses associated with predicted changes are essential for predicting population persistence. Few studies have examined the effects of both increased mean and variance in temperature on organismal traits, particularly during early life stages. Using lake sturgeon (Acipenser fulvescens) from Black Lake, MI, we tested whether phenotypic variation differed among families reared in two constant (10 and 18°C) and two fluctuating temperature treatments (10-19°C) representing temperatures experienced in the river and a simulated anthropogenic disturbance. Body length, body area, and yolk-sac area were quantified at hatch. Family-by-treatment interactions explained up to 50% of the variance observed among families in offspring hatch traits. Families incubated in 18°C and the fluctuating anthropogenic treatment had 6-10 times higher variance in traits than those incubated at 10°C. Hatched larvae were placed in raceways with ambient river water. Emergence body length, emergence timing, and growth were quantified upon emergence. Families differed in time to emergence and growth with the greatest range observed in the 18°C treatment. Results demonstrate that differential responses among genotypes to changes in the mean and variability of thermal incubation regimes can affect traits at hatch as well as a subsequent ontogenetic stage.

Usage notes

Thermal Hatch Data File

File contains data for the 1200 larvae measured at hatch. Data includes individual ID codes, thermal incubation treatment the individual incubated in from egg to hatch, family code (each code represents a cross between 1 female and 1 male; families were half-sibling groups with one female crossed with two males therefore the half-sib groups include A and B, C and D, E and F, G and H, and I and J), and measurements for the three phenotypic traits quantified at hatch: body length (mm), body area (mm), and yolk-sac area (mm^2). Note: Thermal incubation treatments were coded as A=Warm, B=Variable, C=Ambient, and D=Cold prior to analysis of the data.

thermalhatchdata.csv

Thermal Emergence Data File

File contains data for the 303 larvae measured at the time of emergence and corresponds to the same individual ID numbers, incubation treatments, and family codes as the hatch data file. Data includes individual ID codes, thermal incubation treatment the individual incubated in from egg to hatch, family code (each code represents a cross between 1 female and 1 male; families were unrelated), measurements for the three phenotypic traits quantified at the time of emergence: time to emergence (days), emergence body length (mm), and total growth from hatch to emergence (mm), and estimates for the mean temperature (MeanT) and Degree Days each individual experienced in the rearing chambers within the raceways from hatch until the timing of emergence. Note: Thermal incubation treatments were coded as A=Warm, B=Variable, C=Ambient, and D=Cold prior to analysis of the data.

thermalemergencedata.csv

Location

Michigan