The early observations of Heinroth & Heinroth (1927) established that the nasal glands in the marine eider duck (Somateria mollisima) were reduced in size when the birds were given fresh water. These experiments were later confirmed in the domestic duck and the glaucous-winged gull, LOTUS glaucescens, (Schildmacher, 1932; Holmes, Butler & Phillips, 1961; Holmes, Phillips & Chester Jones, 1963)....

Background: Enzymes are the biological catalysts which accelerate the various cellular reactions. In general, the enzymes alkaline phosphatase (ALPase), acid phosphatase (ACPase), 5′-nucleotidase (5′-Nu) and glucose-6phosphatase (G-6-Pase) have important roles in metabolism. In the present study, a comparative account of the localization of activity of four enzymes acid phosphatase, alkaline ph...