A sensorimotor instability drives a locomotor transition during fish development.

Area of Science:

• Neuroscience
• Developmental Biology
• Animal Locomotion

Background:

• Animals require adaptable movement for survival, with locomotor patterns changing during development.
• The mechanisms orchestrating flexible and adaptive locomotor adjustments remain poorly understood.

Purpose of the Study:

• To investigate the developmental transition in locomotion in the miniature fish Danionella cerebrum.
• To understand the adaptive strategies and underlying principles of sensorimotor control during development.

Main Methods:

• Observation of locomotor patterns in Danionella cerebrum across developmental stages.
• Analysis of the energetic costs associated with different swimming styles.
• Experimental manipulation of sensory feedback to assess its role in locomotion transitions.

Main Results:

• A distinct shift from continuous to burst-and-coast swimming was observed around 3 weeks of age.
• This transition was identified as an energy-saving strategy.
• The change was directly linked to the fish's swimming strength and sensorimotor control instability, rather than a predetermined developmental switch.

Conclusions:

• Locomotor development is a dynamic process influenced by the interplay of body, brain, and environment.
• Adaptive locomotion strategies, like energy conservation, are crucial for survival.
• Danionella cerebrum serves as a valuable model for studying the principles of adaptive movement and sensorimotor integration.