Laboratory rat characteristics

Hello everyone, I am a SD rat (Sprague-Dawley). In 1925, a hybrid male and a female Wistar rat were mated to a strain on the Sprague Dawley farm in the United States. Since we can be widely used in pharmacology, toxicology, efficacy and GLP experiments, our closed population development has become very large.

Now I live in Nanjing University-Nanjing Institute of Biomedical Research. My nurse is my father, my breeder is my mother, and there are a large group of brothers and sisters. Let me introduce you here:

This one, is a ligation, I heard that surgery was performed in 7 weeks~å“Ž, now I still lose weight every day, exercise, dreaming to find a sister to spend the rest of my life. Our slogan is - "We are just porters who make receptors."

These are the recipients of the girl, but the top one is good, and the beautiful girl~~ are good sisters of 10 weeks (body weight 220~300g), they made outstanding for the micromanipulation of the rat. Contribute, it’s really a dad’s intimate little cotton jacket – “We don’t advocate free love, we need to arrange marriage~~”

Hey! Ladies and gentlemen, I said that I can speak a little bit, and the decibel cannot exceed 60. My wife and children are sleeping! I want my wife to be pregnant for 20 days, then pull the child for 20 days~~~~ My child is so small, only about 60g when I am caged! I am more with them!

Always say how big is the rat rat to rat? Then there is a comparison chart today, so that everyone can see the difference in body shape between rats and mice intuitively and clearly.

Rat characteristics

1. Rats are docile and easy to catch, generally do not actively bite people.

2, rats are omnivores, have the habit of drinking at any time

3, activities are mostly from dusk to early morning, during the day, often in the cage to close the eyes to rest, mating more often at night

4. It is extremely sensitive to dust, ammonia, hydrogen sulfide, etc. in the air, and is easy to cause respiratory diseases. The main cause of death in rats is open respiratory disease.

5, very sensitive to a variety of stimuli, small changes in environmental conditions can also cause rat reactions, strong noise can cause panic, mutual biting, with the mother will appear eating

6. The life span of rats is generally 2.5~3 years. The hybrid group and the distant group generally have a longer life than the inbreed group.

7, rats 19-21 days of pregnancy, lactation 18-21 days, 6-12 births per year, 8-13 per litter. Daily consumption of 5g (100g body weight); daily drinking water 8-11ml (100g body weight).

Sexual maturity age: ♂ 60 days old ♀ 70 days old;

Mature age: ♂ 90 days old ♀ 80 days old.

I am a rat! It's not the same fireworks, I bring salt to the rats!

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