Plasma calcium and calcitonin levels at food intake in eels and goldfish

概要

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In order to examine whether calcitonin plays an important role in Ca homeostasis of teleosts, such as suppressing hypercalcemia at food intake, we compared the plasma Ca levels and calcitonin levels in eels fed normally with eels starved for one week (Experiment I), and in goldfish administered with a high Ca-consomme solution into the digestive tract with goldfish given physiological saline solution (Experiment II). In Experiment I, the plasma Ca levels and calcitonin levels in the fed eels were significantly higher than those in the starved eels after one week. In Experiment II, the plasma Ca levels in the high Ca-treated goldfish were significantly higher than those in the saline-treated goldfish after 1 hr and 3 hr. The number of goldfish showing over 500 pg/ml of plasma calcitonin was significantly higher in the high Ca-treated group than in the saline-treated group. From the results of both experiments, we conclude that in these two species, Ca and/or nutriment absorbed via the digestive tract may affect plasma calcitonin levels. However, more experiments are needed to directly demonstrate that calcitonin suppresses hypercalcemia at food intake.
社団法人日本動物学会の論文
1996-10-15