Calcium Homeostasis in Low and High Calcium Water Acclimatized Oreochromis Mossambicus Exposed to Ambient and Dietary Cadmium

Simple item page
dc.contributor.authorPratap, Harish B.
dc.contributor.authorBonga, Sjoerd W.
dc.date.accessioned2016-05-11T14:06:46Z
dc.date.available2016-05-11T14:06:46Z
dc.date.issued2007
dc.description.abstractThe effects of cadmium administered via ambient water (10 µg/l) or food (10 µgCd/fish/day) on plasma calcium, corpuscles of Stannius and bony tissues of Oreochromis mossambicus acclimated to low calcium (0.2 mM) and high calcium (0.8 mM) water were studied for 2, 4, 14 and 35 days. In low calcium water acclimated fish, ambient cadmium induced significant hypocalcemia, while the structure and morphometry of type-1 and type-2 cells of corpuscles of Stannius were not affected on day 2 and 4. Subsequently on day 14 and 35, recovery of plasma calcium to normal levels was observed followed by a decrease in corpuscles of Stannius index (CSI), cell size, volume of granular endoplasmic reticulum (p<0.05) of type-1 cells in both, fish exposed to ambient or dietary cadmium. The type-2 cells were not affected. In high calcium water acclimated fish both, ambient and dietary cadmium caused a significant reduction of plasma calcium levels on day 2 and 4. In these fish, there was a significant transient increase in the size of corpuscles of Stannius on day 4, followed by recovery on day 14 and 35. Ultrastructural observations of corpuscles of Stannius revealed that cadmium did not cause any cellular damage on type-1 and type-2 cells during 35 days exposure. In low or high calcium water acclimatized tilapia exposed to ambient or dietary cadmium had no effect on the calcium and phosphate composition of the scales, operculum and vertebrae. Thus, it is unlikely that recovery of hypocalcemia was due to the dissolution of calcium from bony tissues. This study also revealed that cadmium does not mediate stimulation of the corpuscles of Stannius gland, and that high Ca2+ water had a protective effect against ambient and dietary cadmium.en_US
dc.identifier.citationPratap, H.B. and Wendelaar Bonga, S.E., 2007. Calcium homeostasis in low and high calcium water acclimatized Oreochromis mossambicus exposed to ambient and dietary cadmium.en_US
dc.identifier.urihttp://hdl.handle.net/20.500.11810/1951
dc.language.isoenen_US
dc.subjectCalciumen_US
dc.subjectCadmiumen_US
dc.subjectCorpuscles of Stanniusen_US
dc.subjectOreochromis mossambicusen_US
dc.titleCalcium Homeostasis in Low and High Calcium Water Acclimatized Oreochromis Mossambicus Exposed to Ambient and Dietary Cadmiumen_US
dc.typeJournal Article, Peer Revieweden_US
Files
Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
Calcium homeostasis in low and high calcium water acclimatized Oreochromis.pdf
Size:
3.9 MB
Format:
Adobe Portable Document Format
Description:
full text
Download
License bundle
Now showing 1 - 1 of 1
No Thumbnail Available
Name:
license.txt
Size:
1.71 KB
Format:
Item-specific license agreed upon to submission
Description:
Download
Collections
Department of Zoology and Wildlife Conservation