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Experiences with the identification of small rodents
Jikken Dobutsu. Experimental Animals
|July 1, 1986
Summary
Ear tattooing is the most effective method for lifelong identification of adult mice and rats. For newborns, India ink injections into the paw are recommended for reliable marking.
Area of Science:
- Animal Science
- Laboratory Animal Welfare
Background:
- Accurate identification of laboratory animals like mice and rats is crucial for research integrity.
- Various methods exist for animal marking, each with advantages and disadvantages.
Purpose of the Study:
- To compare the efficacy and suitability of different identification methods for mice and rats.
- To recommend the optimal marking techniques for adult and newborn rodents.
Main Methods:
- Comparison of ear tagging, ear punching, toe clipping, and ear tattooing.
- Evaluation of methods based on ease of application, readability, and animal welfare.
- Author's practical experience and literature review.
Main Results:
- Ear tattooing using newly developed pincers is the most suitable method for lifelong identification of adult rodents.
- Tattooing is easy to apply, read, and does not harm the animals.
- Subcutaneous injection of India ink into the palm of the paw on day 4 post-partum is recommended for newborn pups.
Conclusions:
- Ear tattooing offers a superior, humane, and permanent solution for marking adult laboratory rodents.
- India ink paw injection is an effective method for identifying neonatal mice and rats.