Data from: Separating the generational effects of temperature and viscosity on the body size of a freshwater Mesocyclops copepod
Data files
May 16, 2026 version files 101.32 KB
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Effects_of_Temp_and_Visc_BiO_Supplemental_Datasets.xlsx
97.17 KB
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README.md
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Abstract
Copepod body size is known to have a negatively correlating relationship with temperature, yet temperature impacts multiple aspects of a copepod's life, one such variable being viscosity. This study compared Mesocyclops sp. copepods from two different lineages and how their offspring changed in body size when grown at differing temperatures and viscosities across five generations. The artificial viscous conditions were warm, with the equivalent viscosity of the cold water conditions. It was found that temperature has a significant effect on copepod body size, with copepods grown in warm water reaching the same body sizes, no matter the viscosity. Additionally, copepods grown in cold water were significantly larger than copepods grown in cold water, but reached sexual maturity slightly later than the warm copepods. This dataset is a collection of Mesocyclops sp. body measurements across the entire body length, as well as the prosome, and the body volume calculated through an ellipsoid cone-dome model. All of these values are organized across generations, temperatures, and viscosities. The ANOVA calculations for comparing different temperatures, viscosities, and generations are included in tables as well.
Dataset DOI: 10.5061/dryad.2bvq83c5c
Description of the data and file structure
This dataset is a collection of Mesocyclops body lengths (measured from the tip of the prosome to the end of the urosome), widths (the widest point of the prosome), and calculated volume through an ellipsoid cone+dome model. Length and width are in micrometers, volume is calculated in millimeters cubed. Each page is organized by the Generation of copepod, the condition it was grown in (Temperature, or temperature with viscous water). ANOVA for all of these measurements is provided as a collection of tables. Additionally, we counted the number of eggs the female copepods produced prior to the experiment, so that we could estimate how many nauplii would hatch from each female. We also did a maturation study, comparing the population percentage of nauplii, copepodites, and adult copepods across 20 days. This was done through a random pulling of 15 individuals from the respective condition, which were staged to the nauplius, copepodite, or adult level.
Files and variables
File: Effects_of_Temp_and_Visc_BiO_Supplemental_Datasets.xlsx
Description: Collection of copepod body measurements, volume calculations, egg counts, and maturation rates for copepods across different temperatures and viscosities. The two test temperatures are 18 °C (Celsius) and 30 °C, while the viscous cultures are 30 °C with the equivalent viscosity of 18 °C. Culture conditions are shortened into temperature, #C, altered viscous conditions, #PVP, and the original starting temperature (#C). For example, 30C 18PVP (18C) are copepods living in water that is 30C, has the equivalent viscosity of 18C, and has ancestry from 18C water. The Excel file is broken into 8 tabs,
- Length, the total length of the copepods, from the tip of the prosome to the end of the caudal rami, measured in micrometers.
- Length ANOVA, comparisons of the different lengths across generations and experimental conditions.
- Width, the width of the copepods measured horizontally across the widest width of the copepod's prosome, measured in micrometers.
- Width ANOVA, comparisons of the different lengths across generations and experimental conditions.
- Volume, the calculated volume of the copepods using approximations from a combined cone and dome model, assuming that the front half of the prosome is in the shape of a dome, and the back half of the prosome, urosome, and caudal rami form a cone. This model was further refined with the elliptical cone+dome model, where the calculated volumes were divided in half to mimic the dorsal-ventral flattening of the copepod.
- Volume ANOVA, comparisons of the different lengths across generations and experimental conditions.
- Egg Counts: the list of female copepods measured for their number of eggs. The list is organized in order from greatest to least number of eggs, to better visualize the makeup of each quartile.
- Maturation Rates: the number of nauplii, copepodites, and adult copepods sampled over the course of 20 days of growth in the original 18 °C cultures and 30 °C cultures. These values were then converted into percentages of the total sampled population, so that the sum percentage of nauplii, copepodites, and adult copepods was 100%.
Variables and Terms
- Length- micrometers (um)
- Width- micrometers (um)
- Volume- millimeters cubed (mm3)
- Temperature- Celsius (C)
- PVP- Shorthand for Polyvinylpyrrolidone, used to thicken the water to match the viscosity of lower temperatures.
- Nauplii- plural for nauplius, the 6 early stages of a copepod's life.
- Copepodite- the 5 juvenile, non-sexual stages of a copepod, which resemble a smaller version of the adult copepod.
Code/software
No code or open software required to view the data.
Access information
Other publicly accessible locations of the data:
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Data was derived from the following sources:
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