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Related Experiment Video

Updated: Jul 25, 2025

Measuring Embryonic Viability and Brood Size in Caenorhabditis elegans

Measuring Embryonic Viability and Brood Size in Caenorhabditis elegans

Published on: February 24, 2023

Brood size in an uncertain world.

Alex James¹, Alexander Hann¹, E Penelope Holland²

¹School of Maths and Stats, University of Canterbury, Christchurch, New Zealand.

Royal Society Open Science

|June 23, 2023

Summary

Reproducing in unpredictable environments requires balancing risks. The optimal strategy involves adjusting brood size and synchronizing reproduction with resource availability for better survival.

Keywords:

masting optimal brood size reproduction stochastic model

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Area of Science:

Ecology
Evolutionary Biology
Population Dynamics

Background:

Reproduction involves a trade-off between investing in offspring and environmental uncertainty.
Resource availability fluctuates, impacting reproductive success and population dynamics.

Purpose of the Study:

To determine the optimal brood size for reproduction under stochastic environmental conditions.
To analyze reproductive strategies in response to varying resource availability and environmental changes.

Main Methods:

Developed a population and individual growth model.
Utilized Lyapunov exponents for analytical solutions.
Simulated environmental variability and resource fluctuations.

Main Results:

Smaller brood sizes increase success in dramatically changing environments.
Synchronizing reproduction with food availability is the optimal strategy.
Plastic strategies in variable environments can outperform constant strategies in stable environments, especially with high reproductive costs.

Conclusions:

Adaptive reproductive strategies are crucial for species survival in uncertain environments.
Environmental plasticity and synchronization with resources are key to successful reproduction.
Findings have implications for understanding invasive species and climate change impacts on populations.