US EPA

4672227 

Journal Article 

Field study on Cadmium pollution in water and Crustacean gill parasites in cultured Tilapia zilli at Lower Egypt fish farms 

El Deen, AIEN; Shalaby, SIA; Zaki, MS 

2011 

1 

Life Science Journal
ISSN: 1097-8135 

8 

2 

599-605 

WOS:000303520200082 

The aim of this study is to explain the relationship between Cadmium pollution in water and Crustacean gill parasites in cultured Tilapia zilli at Lower Egypt fish farms. A total of 375 adults Tilapia zilli cultured at Lower Egypt fish farms were studied the effect of water cadmium pollution on clinical examination and the prevalent seasonal crustacean gill parasitic infestations in the period 2009-2010. This investigation revealed the appearance of the parasites during spring, summer and autumn and their disappearance during winter. Clinical signs were pale skin, blood spots with cognation of gills, as well as post mortem lesions and isolation of infested parasites. Ergasilus sp and Lamproglena sp were increased in gills with high concentration of cadmium. The present study was concluded that, there were inversely proportion relationship between cadmium concentration pollution in aquaculture and the prevalence of gill crustacean infestation during spring, summer and autumn seasons while infestation was disappeared during winter season. Also, there was a relationship between cadmium residues in Tilapia zilli gills and its concentration in the water, the obtained results showed that the cadmium concentration in the gills were higher than that in the water. 

Tilapia zilli; gills; cadmium; Ergasilus sp.; Lamproglena sp.; pollution