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Bumblebee worker body size affects new worker production in different resource environments

View ORCID ProfileNatalie Z. Kerr, View ORCID ProfileRosemary L. Malfi, View ORCID ProfileNeal M. Williams, View ORCID ProfileElizabeth E. Crone
doi: https://doi.org/10.1101/2020.01.16.909135
Natalie Z. Kerr
1Department of Biology, Tufts University, Medford, Massachusetts 02155, USA
2Department of Biology, Duke University, Durham, North Carolina 27710, USA
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  • For correspondence: natalie.kerr@duke.edu
Rosemary L. Malfi
3Department of Biology, University of Massachusetts-Amherst, Amherst, MA 01003, USA
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Neal M. Williams
4Department of Entomology and Nematology, University of California, Davis, CA 95616, USA
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Elizabeth E. Crone
1Department of Biology, Tufts University, Medford, Massachusetts 02155, USA
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ABSTRACT

  1. Behavior and organization of social groups is thought to be vital to the functioning of societies, yet the contributions of various roles within social groups have been difficult to quantify. A common approach to quantifying these role-based contributions is evaluating the performance of individuals at conducting certain roles, these studies ignore how these performances might scale up to effects at the population-level. Manipulative experiments are another common approach to determine population-level effects, but they often ignore potential feedbacks associated with these various roles.

  2. Here, we evaluate the effects of worker size distribution in bumblebee colonies on worker production, using functional linear models. Functional linear models are a recent correlative technique that has been used to assess lag effects of environmental drivers on plant performance. We demonstrate potential applications of this technique to explore contributions of social animals to ecological phenomenon.

  3. We found that the worker size distribution differentially affected new worker production across three resource environments. Specifically, more larger workers had mostly positive effects and more smaller workers had negative effects on worker production. Most of these effects were only detected under low or fluctuating resource environments suggesting that the advantage of colonies with larger-bodied workers becomes more apparent under stressful conditions.

  4. We demonstrate the wider ecological application of functional linear models. We highlight the advantages and limitations when considering these models, and how they are a valuable complement to many of these performance-based and manipulative experiments.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. All rights reserved. No reuse allowed without permission.
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Posted January 17, 2020.
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Bumblebee worker body size affects new worker production in different resource environments
Natalie Z. Kerr, Rosemary L. Malfi, Neal M. Williams, Elizabeth E. Crone
bioRxiv 2020.01.16.909135; doi: https://doi.org/10.1101/2020.01.16.909135
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Bumblebee worker body size affects new worker production in different resource environments
Natalie Z. Kerr, Rosemary L. Malfi, Neal M. Williams, Elizabeth E. Crone
bioRxiv 2020.01.16.909135; doi: https://doi.org/10.1101/2020.01.16.909135

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