Abstract

Dryden (1969) reported that the testes in the musk shrew resided in the posterior position of the abdominal cavity in shallow coelomic evaginations called cremaster sacs. Dryden & McAllister (1970) found the testes in this species were resistant to cadmium damage and suggested this was due to the similarity between testicular temperature and body temperature and the apparent lack of a pampiniform plexus. They reported a mean rectal temperature of 33·7±0·3°C and a mean cremaster sac temperature of 32·4±0·3°C under ether anaesthesia. Since it is known that the process of spermatogenesis is very heat-sensitive, the control of deep body temperature may be as important to testicond species as the control of testis temperature is to scrotal mammals. For this reason, we performed two experiments: (1) measurement of the deep body temperatures

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