Some studies on the immune status and growth performance of cultured oreochromis niloticus [electronic resource].

Includes references.

The current study investigated the efficts of methionine and lysine amino acids deficiency on freshwater fish on growth performances and different immunological parameters. A total number of 120 healthy fishes were divided into 4 groups each group subdivided into 3 sub group that distributed in 3 aquaria 10fishes per each aquarium . The first group was fed on lysine deficient feed group, the second group was fed on methionine deficient feed group, the third group was fed on methionine and lysine dejicient feed group, the fourth group fed on a basal diet as control formulated according nrc (1984) for fish recommendation. The results concerning growth performance demonstrated that the deficiency ofmethionine and lysine causes decreasing ofbody weight, body weight gain andfeed conversion ratio than the control group. The results of blood revealed that, the lymphocytes, monocytes, basophiles and eosinophiles percentages decreased severely in deficiency of methionine and lysine followed by methionine only but the deficiency oflysine not affected severely on lymphocyte. The results of serum glutamic oxalacetic transaminase (sgot) and serum glutamic pyruvic transaminase (sgpt) showed increase in their levels than control group.

Summary in Arabic.

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