VERIFICATION OF THE DELETERIOUS EFFECTS OF LERNAEOSIS ON THE HEALTH OF GRASS CARP (CTENOPHAR YNGODONIDELLA) | ||||
| Egyptian Journal of Aquatic Biology and Fisheries | ||||
| Article 12, Volume 7, Issue 4, September 2003, Page 241-261 PDF (2.74 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejabf.2003.1793 | ||||
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| Abstract | ||||
| Experimental infestation of Ctenophuryngodon idella (80-90 g) with laboratory reared first copepodid stage of Lernaea cyprinacea (a parastitic copepod ) resulted in clinical lernaeosis. The mortality rate reached up to 40% of the infested group within <a month at 26 ± 2°C. The sequential clinical abnormalities, histolopathcrilogicai and hematological alterations with elevation in the cortisol lewd had verified experimentally the deleterious effects of lernaeosis* on the health of G idella. Periodical examination of the experimentally infested C. idella cleared that the females parasites were tlfrie most physically detrimental stage to-the. fisfcv withe regard to their ranode of attachment and cortisol response. Induction of lernaeosis in the present investigation may be important when attempting to develop useful effective protective and / or curative measures for lernaeosis in G idella and probably in other cyprinids. | ||||
| Keywords | ||||
| parasites. Lernaea cyprinacae; mortality; hematoilogy. histopathology; biological stress; cortisol. Ctenopharyngodon idella. experimental infestation | ||||
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