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Effects of low temperatures on the red blood cell count of newts in wintertime


Bollettino Societa Italiana Biologia Sperimentale 60(1): 93-98
Effects of low temperatures on the red blood cell count of newts in wintertime
In wintertime, specimens of Triturus cristatus carnifex kept at 5.degree. C show a decrease in the concentration of circulating erythrocytes and marked hypertrophy of the spleen, in comparison to animals raised at 15.degree. C. Thanks to their capacity to accumulate a large number of erythrocytes in the spleen, newts can switch from their condition of seasonal hyperactivity, maintained by a high concentration of circulating erythrocytes, to hibernation. This is the reason why red blood cell counts made on freshly collected animals during the winter are extremely heterogeneous.


Accession: 005312988



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