Some factors affecting metacercarial infections in Oreochromis niloticus collected from brackish water, Ismailia, Egypt | ||
| Egyptian Academic Journal of Biological Sciences, B. Zoology | ||
| Article 4, Volume 4, Issue 1, December 2012, Pages 29-37 PDF (207.54 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/eajbsz.2012.13536 | ||
| Authors | ||
| Ehssan A. Hassan; Maha F.M. Soliman; Abdel Fattah A. Ghobashy | ||
| Zoology Department, Faculty of Science, Suez Canal University, Ismailia, Egypt | ||
| Abstract | ||
| The objective of this work is to study the environmental and biological factors affecting metacercarial infections in O. niloticus from brackish water, Ismailia, Egypt. Fish were collected monthly during the period from March 2009 to February 2010 from two sites in El Sayadeen pool at Ismailia. Nine different trematode metacercariae and undifferentiated cyst were recovered from O. niloticus fish. The identified metacercariae were Euclinostomum sp., Pygidiopsis sp., Prohemistomum sp., Phagicola sp., Bolbophorus sp., Stictodora sp., and Haplorichis sp. The total prevalence was higher in site 2 (75.44%) than site 1 (71.41%). The highest infection was recorded in winter (75%), and the lowest in spring (24.67%). Infection was the highest (76.86%) in the largest fishes in weight and size. Infection was higher in female fish (77.57%) compared to males (70.73%). Prevalence, intensity and abundance of each metacercaria species showed different responses to the considered factors. | ||
| Keywords | ||
| metacercariae; O. niloticus; sites; seasonal patterns; host size and sex | ||
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