Periods of environmental sensitivity couple larval behavior and development

Area of Science:

• Developmental Biology
• Animal Behavior
• Caenorhabditis elegans Research

Background:

• Larval stages are crucial for animal development, bridging embryogenesis and adulthood.
• Coordinating larval behavior with developmental progression is poorly understood.
• Environmental cues significantly influence larval growth and morphology.

Approach:

• Investigated the role of male-excreted pheromones in accelerating C. elegans larval development.
• Analyzed the temporal sensitivity of larvae to environmental inputs.
• Characterized distinct behaviors associated with food searching and consumption across larval stages.

Key Points:

• Male pheromones accelerate C. elegans hermaphrodite development by advancing multiple events in the final larval stage.
• Larval sensitivity to accelerating pheromones is restricted to a specific window at the end of the penultimate stage.
• Larval stages in C. elegans are behaviorally divided into epochs for environmental assessment and resource acquisition.

Conclusions:

• C. elegans larval stages are subdivided into epochs for environmental assessment and resource consumption.
• Larval behavior plays a key role in coordinating development with environmental conditions.
• This epoch-based behavioral organization is predicted to be conserved across diverse animal larvae.