| Popis: |
Newborn sibling platyfish, Xiphophorus maculatus, were placed into one-third sea water (/sup 1///sub 3/ SW) and controls were retained in fresh water (FW). At 6 months of age, groups of fish were transferred from /sup 1///sub 3/ SW to FW for 2,3,4 and 7days. Light microscopic, cytometric, and autoradiographic analyses of the pituitary glands provided evidence of low synthetic activity in the prolactin cells of fish kept in /sup 1///sub 3/ SW for 6 months, and an increase in this activity by 2 days afetr fish were returned to FW. The similarity of these results to those previously obtained when platyfish were returned to FW from 30 days in /sup 1///sub 3/ SW suggests that the time required for the restoration of synthetic activity in their prolactin cells is not a function of the time spent in the saline medium. |
