Data from: Diet-induced plasticity modifies relationships between larval growth rate and post-metamorphic behavior and physiology
Data files
Dec 10, 2024 version files 46.14 KB
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README.md
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Shephard_et_al_2024_supplementary_data.xlsx
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Abstract
It has frequently been hypothesized that among-individual variation in behavior and physiology will correlate with life history traits, yet the nature of these correlations can vary. Such variability may arise from plasticity in trait development, which can amplify or attenuate trait correlations across different environments. Using the Mexican spadefoot toad (Spea multiplicata), we tested whether relationships between larval growth rate and post-metamorphic behavior or physiology are influenced by a key mediator of developmental plasticity: larval diet type. S. multiplicata larvae develop on two alternate diets, with slower growing omnivores feeding on detritus and faster growing carnivores consuming live fairy shrimp. We found that correlations between larval growth rate and post-metamorphic behavior and physiology differed by diet type. Among detritus feeders, faster growing larvae developed into juvenile frogs that were not only bolder but also had higher hypothalamic-pituitary-interrenal axis reactivity (an indicator of stress responsiveness) and longer telomeres, suggesting greater somatic maintenance. In contrast, among shrimp feeders – which exhibited faster growth overall – larval growth rate was less strongly correlated with juvenile behavior and physiology, indicating that a shift from omnivory to carnivory can attenuate trait correlations among individuals. Overall, our study suggests that developmental plasticity induced by different diet types can modify relationships between life history traits and individual behavior or physiology.
README: Data from: Diet-induced plasticity modifies relationships between larval growth rate and post-metamorphic behavior and physiology
https://doi.org/10.5061/dryad.pzgmsbcw5
Description of the data and file structure
Treatment and identification data:
ID: Identification number for each individual frog
family: Full-sibling family that each individual belongs to
diet: Dietary treatment that each individual was reared under during larval development
CORT_treatment: identifies whether CORT hormone concentration was measured under "baseline" or "stress_induced" conditions
Life history data:
time_to_tail_resorption: number of days between assignment of larva to dietary treatment and date of tail resorption (units: days)
mass_at_tail_resorption: mass on date of tail resorption (units: grams)
juvenile_growth_rate: (mass_at_tail_resorption) divided by (time_to_tail_resorption)
mass_at_behavioral_assay: mass measured prior to behavioral and CORT assays (units: grams)
mass_at_dissection: mass measured prior to dissection for telomere assay (units: grams)
tail_resorption_date: date on which tail resorption was recorded
Behavioral data:
Latency: latency to move (units: seconds)
Suc_strike: number of successful strikes at prey items
Unsuc_strike: number of unsuccessful strikes at prey items
Wall_strike: number of strikes at wall of assay
Total_prey_strike: total number of strikes at prey items
Total_distance: total distance travelled (units: millimeters)
Exp_rate: exploration rate (number of areas explored over time)
Physiological data:
CORT_conc: waterborne corticosterone concentration measured under either baseline or stress-induced conditions (units: nanograms per milliliter)
norm_CORT_reactivity: corticosterone reactivity, measured as stress-induced CORT production relative to baseline CORT production
T_S_ratio: measure of relative telomere length
*Description of N/A values: *
All N/A values represent data that is not available.
Methods
Data generated from a manipulative lab experiment.