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0.05). All isolates have not antagonistic activity against Yersinia ruckeri and Aeromonas hydrophila but, Lactobacillus casei showed mild antagonistic activity. Resistance to different antibiotics was not significantly different (p> 0.05). But Fish11 showed the greatest resistance to the antibiotics. The hydrophobicity percentages were higher in all tested bacterias compare to the positive control. In this study all phytase producer bacterias had almost similar potential probiotic indices which were comparable to confirmed probiotic bacteria, L.casei. Then for choosing the best isolate possessing phytase producing ability and probiotic potential, more in vitro investigations as well as in-vivo study should be designed.]]>
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0.05) But no significant difference was observed in the daily growth (P<0.05). The biochemical composition (triglyceride, cholesterol, glucose, LDL, HDL and blood protein) in the treatments are significant differences (P<0.05). Based on the analysis of carcass significant differences between treatments in terms of moisture, fat, protein and ash seen significant (P<0.05). Maximum protein and ash and minimum fat was related to T3. According to the results we can say that vitamin niacin the significant effect on weight Sterliad no growth and reduce the fat and increase the body protein. As a result of the addition of 30 mg per kg of food vitamin niacin positive effect on the quality of its fish.]]>
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0.05). Then 8 days of exposure resulted severe signs of alteration like lumen expansion and blood congestion in primary lamella in gill tissues and focal necrosis in liver tissues (P<0.05). Resulted alterations based on our observations were attributed to water pollution in Anzali wetland.]]>
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muscle). The arrangement concentrations of heavy metals are Zn>Pb>Ni>Cd, in both stations. The mean heavy metals concentration in hepatopancreas and muscle showed significant difference (P<0.05). In this study, concentration of heavy metals (Ni, Cd, Pb and Zn) in muscle tissue of Metapenaus affinis was compared with WHO, FDA, Sciortino and Ravikumar and MAFF standards and it was found that the concentrations are lower than standard level and therefore they can be used for human consumption.]]>
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0.05). Siah Mahi populations had significant differences in morphometric traits, but these differences will not separate populations. Differences in ecological conditions such as flow rate, temperature, oxygen, vegetation and nutritional status were diagnosed as important factors in morphometric differences between populations-studied.]]>
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0.05). The lowest and highest specific growth rate were observed in 40% and 50% of dietary protein, respectively. The best feed conversation rate was obtained in fish that fed with 45% dietary protein. Results obtained from the feed conversation rate parameter of Oscar fish showed that with increasing the dietary protein from 40% to 45%, better feed conversation rate can be seen in fish, but, with further increase of dietary protein to the 50% and 55%, feed conversation rate parameter will increase.]]>
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