p. 1−10
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p. 11−18
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p. 19−28
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p. 29−38
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p. 39−54
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p. 65−72
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0.05). At the start of feeding, activity of pepsin, trypsin, chymotrypsin and alkaline phosphatase were higher in Rainbow trout than in Caspian brown trout but the difference was not significant for pepsin (P>0.05) whereas trypsin, chymotrypsin and alkaline phosphatase were significant different between the two (P<0.05). A-amylase was lower in Rainbow trout than in Caspian brown trout but not significantly (P>0.05). Lipase was similar in both fish. Higher enzyme activity in Rainbow trout than in Caspian brown trout at 2/3 yolk-sac absorption shows the high ability for digesting food in rainbow at this stage. Also, low enzyme activity in Caspian brown trout at this stage is believed to be one of the reasons for low food intake and digestion at this stage.]]>
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0.05) as compared to the control group. FCR and PER improved with Zeolite addition and in treatment four with 2 percent Zeolite level showed significant difference (P<0.05). No significant difference was found between treatments 1, 2, 3 and the control diet. Body carcass composition assessment of the crayfish fed on different levels of Zeolite was not significantly different to that of the treatment.]]>
p. 81−90
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p. 91−102
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p. 103−112
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p. 113−122
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p. 123−132
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p. 133−146
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p. 147−154
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0.05). The research indicated that the high-density polyethylene tanks made are more suitable for Rutilus frissi kutum culture than fiberglass and aquarium tanks.]]>
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p. 159−164
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p. 105−118
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