期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 74, 期 3, 页码 279-283出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2010.10.031
关键词
Cadmium and mercury; Hyperglycemic hormone; Eyestalk ablation; Hemolymph glucose; Crab; Oziotelphusa senex senex
资金
- Department of Science and Technology [SP/SO/C-42/2001]
- Department of Science and Technology, New Delhi [SP/SO/C-42/2001]
The effect of exposure to sublethal concentrations of cadmium chloride and mercuric chloride on hemolymph glucose levels of the freshwater crab, Oziotelphusa senex senex, was studied. Intact crabs exposed to cadmium or mercury exhibited a significant hyperglycemia compared to controls, but no significant differences in hemolymph glucose level were detected among the eyestalkless crabs after exposure to metals, suggesting that the effect of metals could be on the sinus gland in the eyestalks, increasing secretion of the hyperglycemic hormone. To test this hypothesis, eyestalks were collected from control and metal exposed crabs, and tested for hyperglycemic effect and also for the hyperglycemic hormone levels. The levels of hyperglycemic hormone and the hyperglycemic effect were significantly low in the eyestalks collected from metal exposed crabs when compared with eyestalks from control crabs. These results strongly suggest that metals act, at least in part, by triggering the secretion of hyperglycemic hormone from the eyestalk. (C) 2010 Elsevier Inc. All rights reserved.
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