Some factors affecting metacercarial infections in Tilapia zilli from Lake Timsah, Ismailia, Egypt | ||
| Egyptian Academic Journal of Biological Sciences, B. Zoology | ||
| Article 3, Volume 4, Issue 1, December 2012, Pages 21-28 PDF (179.22 K) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/eajbsz.2012.13535 | ||
| 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 some environmental and biological factors affecting metacercarial infections in Tilapia zilli from two sites at Lake Timsah, Ismailia, Egypt. Fish were collected monthly from two sites during a period from March 2009 to February 2010. Fish length and sex were determined. Five different trematode metacercariae were recovered from T. zilli fish, namely, Euclinostomum sp., Pygidiopsis sp, Phagicola sp., and Stictodora sp. and some were undifferentiated. Infection was higher in site 2 (42.4%) than site 1 (32.59%). The highest infection was recorded in winter (79.76%), and the lowest in spring (9.52%). It was the highest (40.51%) in medium-sized fish. Males were more infected (38.93%) as compared to females (30.04%). Prevalence, intensity and abundance of each metacercaria species showed different responses to the considered factors as discussed in this work | ||
| Keywords | ||
| metacercariae; Tilapia zilli; sites; seasonal patterns; host size and sex | ||
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