Gharib, S., Dorgham, M. (2000). EFTECT OF DIETH\lJ)rraiOCARBAMATE ON SOME BIOLOGICAL AND PHYSIOLOGICAL PARAMETERS OF MOMPHAIARIA ALEXANDRINA SNAILS. test, 4(2), 157-181. doi: 10.21608/ejabf.2000.1667
Samiha Gharib; Mohamed Dorgham. "EFTECT OF DIETH\lJ)rraiOCARBAMATE ON SOME BIOLOGICAL AND PHYSIOLOGICAL PARAMETERS OF MOMPHAIARIA ALEXANDRINA SNAILS". test, 4, 2, 2000, 157-181. doi: 10.21608/ejabf.2000.1667
Gharib, S., Dorgham, M. (2000). 'EFTECT OF DIETH\lJ)rraiOCARBAMATE ON SOME BIOLOGICAL AND PHYSIOLOGICAL PARAMETERS OF MOMPHAIARIA ALEXANDRINA SNAILS', test, 4(2), pp. 157-181. doi: 10.21608/ejabf.2000.1667
Gharib, S., Dorgham, M. EFTECT OF DIETH\lJ)rraiOCARBAMATE ON SOME BIOLOGICAL AND PHYSIOLOGICAL PARAMETERS OF MOMPHAIARIA ALEXANDRINA SNAILS. test, 2000; 4(2): 157-181. doi: 10.21608/ejabf.2000.1667

EFTECT OF DIETH\lJ)rraiOCARBAMATE ON SOME BIOLOGICAL AND PHYSIOLOGICAL PARAMETERS OF MOMPHAIARIA ALEXANDRINA SNAILS

Egyptian Journal of Aquatic Biology and Fisheries
Article 8, Volume 4, Issue 2, April 2000, Pages 157-181    PDF (3.52 M)
Document Type: Original Article
DOI: 10.21608/ejabf.2000.1667
Authors
Samiha Gharib1; Mohamed Dorgham2
1National Institute of Oceanography and Fisheries ,Alexandria
2Oceanography Department, Faculty of Science, Alexandria University
Abstract
In this study, the chronic effects of diethyldithiocarbamate (DDC) on the fecunditiy and on some oxidative and anaerobic enzymes of Biomphalaria alexandhna snails, the intermediate host of Schistosomiasis mansoni in Egypt, were evaluated. The data obtained showed that the exposure of snails to sublethal concentrations of DDC reduced the egg laying capacity of the snails. The hatchabilily and survival rates of eggs, treated with very low concentrations of DDC were significantly reduced. All of the above effects were found lo be concentration and time dependent. Also, these DDC concentrations resulted in a significant decrease in the activity of lactate oxidase (LO), succinate oxidase (SO), known to activate vitellogenesis, and pyruvate kinase (PK), the key enzyme of anaerobic metabolism. On the other hand, the levels of transaminases (AST, ALT) of the exposed snails to DDC concentrations tested were not affected. At the same time, the glycogen content of the treated snails was lowered significantly. Moreover, the tested DDC concentrations caused degenerative changes to the histological architecture of hermaphrodite, albumin and neurosecretory glands of the exposed snails. All these findings may suggest that DDC has anti-fecundity and ovicidal effects on the examined snails, and affects the parasite - snail relationship by inhibiting some enzymes of both vitellogenesis and anaerobic respiration.
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