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Metabolic Rate Diversity Shapes Group Performance in Honeybees.
The American Naturalist
|April 26, 2022
Summary
Honeybee metabolic rate (MR) differences influenced group performance, especially under low resources. Metabolic heterogeneity
Area of Science:
- Ecology
- Evolutionary Biology
- Animal Physiology
Background:
- The metabolic theory of ecology links organismal function to metabolic rate (MR).
- Little is known about how heterogeneity in MR among individuals affects group performance.
- Honeybees offer a model system to study MR and group dynamics.
Purpose of the Study:
- To investigate the impact of metabolic rate heterogeneity on honeybee group performance.
- To determine how MR differences and resource availability affect key physiological traits.
- To explore the role of metabolic diversity in social evolution.
Main Methods:
- Breeding honeybee genetic lines with distinct low and high MR based on malate dehydrogenase alleles.
- Creating experimental groups with varying phenotypic compositions (monomorphic and polymorphic).
- Measuring MR, energetic intake, thermoregulation, and survival under differing resource conditions.
Main Results:
- Group performance was consistently better under high-resource conditions, irrespective of MR composition.
- Metabolic rate significantly influenced other performance traits, particularly under low-resource conditions.
- Metabolic heterogeneity had varied effects on different performance measures, indicating a diversity effect.
Conclusions:
- Metabolic rate is a crucial factor shaping honeybee group performance and social evolution.
- Resource availability strongly modulates the impact of metabolic rate and heterogeneity.
- Further research is needed to fully understand the role of metabolic diversity in social insects.
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