Bioaccumulation of Cupper and Manganese elements in the Rainbow trout (Oncorhynchus mykiss) eggs during an incubation period

Bioaccumulation of minerals Cupper and Manganese during different stages of embryogenesis was investigated in the Rainbow trout eggs. Two Californian incubators, with the same condition, one of them containing approximately 06666 eggs and the other one without any eggs as control unit to survey of bacterial activities on the studied elements variations were initiated. Sampling was conducted for fertilized eggs (Dry method fertilization) at initiation time (n=166) as control sampling treatment, before being introduced to the incubator; afterward, the egg sampling continued weekly during the incubation period. Same time the variation of the studied minerals in the incubators discharge water compare to entrance water was analyzed. The results showed that the concentrations of Mn and Cu showed increasing trend in early weeks and decreasing trend in later weeks of the incubation period.

Keywords:

Rainbow trout , incubation period , microelement , incubator , embryogenesis