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Two studies were carried out to test the ability of Prealpes du Sud x Lacaune (Study 1) and Rambouillet ewes (Study 2) to recognize their lambs during the first 24 h postpartum. Ewes were given the choice between their own and an alien lamb of approximately the same age, in a triangular pen of 10 mx10 mx10 m. A lamb was placed in each of the two corners while the mother was released from the third...
In recent years concern over the biological effects of low-dose X-rays has been growing. I have noticed that fighting injuries usually observed among male Syrian hamsters tend to decrease in animals irradiated with low-dose X-rays. Therefore, quantitatively the effects of low-dose X-irradiation on aggressive behaviour were examined using a resident-intruder paradigm. Hamsters became gradually calm,...
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