An Open-Source Programmable Interface for Sensory-Motor Biotests with Zebrafish (Danio rerio)

Area of Science:

• Neuroscience and behavioral biology
• Aquatic toxicology and ecotoxicology
• Pharmacology and neuropharmacology

Background:

• Accurate assessment of sensory-motor functions in animals necessitates controlled stimuli for quantifying behavioral phenotypes.
• A gap exists in accessible, low-cost tools for diverse sensory-motor bioassays in fish.
• Current methods often lack the precision and automation required for reproducible behavioral studies.

Purpose of the Study:

• To present an open-source software and hardware interface for automated, programmable stimulus delivery in behavioral bioassays.
• To demonstrate a low-cost technology for establishing reproducible fear responses in larval zebrafish.
• To provide a flexible tool for studying sensory-motor functions across various scientific disciplines.

Main Methods:

• Development of an open-source interface enabling automated delivery of three independent, programmable stimuli.
• Proof-of-concept demonstration using a mechanical tap-startle stimulus in larval zebrafish.
• Quantification of behavioral responses, specifically the tap-startle reflex, characterized by a sudden burst of motion.

Main Results:

• Successful implementation of a low-cost, automated system for delivering controlled stimuli.
• Establishment of reproducible fear responses in larval zebrafish using the tap-startle stimulus.
• Characterization of the tap-startle reflex as a reliable behavioral phenotype.

Conclusions:

• The developed open-source interface offers a simple yet flexible solution for behavioral bioassays.
• This technology facilitates precise and reproducible assessment of sensory-motor functions in fish.
• The tool has broad applicability in neurobiology, neuropharmacology, neurotoxicology, and aquatic ecotoxicology research.