Diurnally active rodents for laboratory research

Area of Science:

• Comparative physiology
• Animal behavior

Background:

• Traditional rodent models (rats and mice) exhibit nocturnal activity, limiting their use in research requiring diurnal rhythms.
• Identifying suitable diurnal animal models is crucial for advancing biomedical research that mimics human activity patterns.

Purpose of the Study:

• To evaluate the diurnal activity patterns of four rodent species: Mongolian gerbil, degu, African grass rat, and antelope ground squirrel.
• To identify the most reliable diurnal animal models for laboratory research.

Main Methods:

• Literature review of existing activity data.
• Recording and analysis of locomotor activity data under controlled light/dark cycles.

Main Results:

• Antelope ground squirrels and African grass rats demonstrated stronger and more concentrated activity during the light phase compared to Mongolian gerbils and degus.
• Antelope ground squirrels showed more exclusive diurnal activity and more robust rhythms than African grass rats.

Conclusions:

• African grass rats and antelope ground squirrels are preferable models for consistent diurnal activity research.
• Antelope ground squirrels offer more robust diurnal rhythms, while African grass rats are more accessible in the Eastern Hemisphere and antelope ground squirrels in North America.