Sweat Gland Secretion in the Black Bedouin Goat

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Abstract
The black bedouin goat is indigenous to the Negev Desert and the Sinai Peninsula and is unusual when compared with other breeds of goat in that it uses sweating rather than panting as its main mode of evaporative heat loss. The sweat rate from the side of the head is greater than that from the thorax. The rate of passive diffusion of water is similar to that of other mammalian species. There is no evidence that circulating adrenaline, either at rest or during exercise, stimulates sweat gland activity. The high rate of sweating is achieved mainly by the individual sweat glands, which secrete at a rate five to 10 times greater than other bovid species. It is concluded that the relatively high solar heat load imposed on this breed of goat by virtue of its black color is primarily dissipated by the development of sweat glands with a high secretory capacity.