ISSN:
1432-0703
Source:
Springer Online Journal Archives 1860-2000
Topics:
Energy, Environment Protection, Nuclear Power Engineering
,
Medicine
Notes:
Abstract The effects of sublethal cyanide exposure on exogenous yolk production by the liver was examined in sexually maturing female rainbow troutSalmo gairdneri at the onset of vitellogenesis. Fish were exposed to a range of sublethal concentrations of cyanide (0.01, 0.02 and 0.03 mg/L) for 7 days at 12.5 ± 1°C. Serum calcium and phosphoprotein phosphorus levels were measured and hepatosomatic indices calculated as indicators of exogenous yolk production. Results indicate that serum calcium levels were signficantly reduced at 0.01 mg/L HCN in males and females. There was no apparent effect upon serum phosphoprotein phosphorus levels or hepatosomatic indices at this concentration. Serum calcium levels in females were significantly reduced when compared with control females and hepatosomatic indices declined at 0.02 mg/L HCN. The implication of reduced serum calcium during early vitellogenesis upon secondary yolk production and reproduction in females is discussed.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01055651
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