Abstract
Cold stress at −10° produced a response from the nasal gland of the water-loaded duck; however, this was more dilute than the normal salt gland secretion, being approximately isotonic. Cold in combination with a hypertonic saline load caused a marked increase in salt gland secretion, but this change was accompanied by symptoms of dehydration, i.e., fall in plasma and muscle water, E.C.F.V., and a rise in haematocrit. During cold stress a fall in the pituitary prolactin level was observed, together with a rise in 131I uptake by the thyroid gland, but no rise in plasma corticosterone levels was observed.
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