This file consists of a spreadsheet, which provides data for the effects of larval density at dispersal, initial larval density, initial number of larvae in the brood, carcass size and shared environmental conditions on mean larval mass and larval survival.
Interactions among siblings fall on a continuum with competition and cooperation at opposite ends of the spectrum. Prior work on the burying beetle Nicrophorus vespilloides suggests that parental care shifts the balance between competition and cooperation by masking a density-dependent shift from cooperation to competition. However, these results should be interpreted with caution because they were based on correlational evidence for an association between larval density at dispersal and mean larval mass at dispersal. Here we test for a causal effect of the initial number of larvae in a brood on the larvae’s subsequent performance (i.e., survival and mass) in the absence of care. We find no effect of the initial larval density on mean larval mass. Thus, our results provide no evidence for sibling cooperation in the absence of care in this species. However, using larval density at dispersal as a predictor of mean larval mass at dispersal, there was a significant correlation between larval density and mean larval mass. Our study highlights the importance of using experimental designs that exclude confounding effects due to shared environmental conditions that otherwise could be misinterpreted as evidence for sibling cooperation.
When using this data, please cite the original publication:
Magneville C, Ratz T, Richardson J, Smiseth PT, Magneville C (2018) No evidence of sibling cooperation in the absence of parental care in Nicrophorus vespilloides. Evolution, online in advance of print. https://doi.org/10.1111/evo.13622
Additionally, please cite the Dryad data package:
Magneville C, Ratz T, Richardson J, Smiseth PT, Magneville C (2018) Data from: No evidence of sibling cooperation in the absence of parental care in Nicrophorus vespilloides. Dryad Digital Repository. https://doi.org/10.5061/dryad.b1k015f
|Date made available||5 Oct 2018|