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0.05). For cocoon shell percentage trait, hybrids 32×31, 31×32, 103×104, and 104×103 had the highest performance respectively (P<0.05). Also all non-Iranian hybrids except Haoyue Jinysong had lower cocoon shell ratio than Iranian hybrids (P<0.05). For good cocoon percentage, all non-Iranian hybrids had higher performance than Iranian hybrids except 31×32, and 32×31 (P<0.01). Hybrids Haoyue Jinysong and 31×32 had the largest cocoon, and hybrids 32×31, Qiufeng Baiyue, and 4532.Xianghui 932.Furong had the smallest cocoon (P<0.01).]]>
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11cm and TLC. gracilis were different in Taleghan River. The results also revealed that the length class with total length of more than 11 cm selects habitats with higher elevation (p<0.05), greater river width (p<0.01), higher water velocity (p<0.01), regions with larger bed stones (p<0.01) and lower temperature (p<0.01). The selected habitats of length class with total length less than 11 cm are area with lower elevation (p<0.05), less river width (p<0.01), lower water velocity (p<0.01) and higher temperature (p<0.01). Presence of proper habitat conditions in Taleghan River has been resulted in an excellent habitat for different age groups of C. gracilis.]]>
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0.05). The results of this research showed that Oriental River Prawn shows the best performance at level of 45% protein and 5% lipid. ]]>
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0.05). A larger weight gain was observed at 2% additive inclusion although this was not statistically different with other treatments (p<0.05). In conclusion, with regard to the observed results, herbal appetizer administration cannot improve growth, feed conversion rate and weight gain in common carps.]]>
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0.05), But (WG), (SGR) and (FCR), the enzyme levels of 500, 750 and 1000 (mg / kg) were significantly different from control group (P <0.05). Calcium in enzyme levels of 500 (mg / kg) was significantly different from control group (P <0.05), but total protein, albumin, and glucose were not significantly different between enzyme levels (P> 0.05).]]>
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0.05).The specific growth factor (SGR) of probiotic treated groups were 1.4,1.5and 1.4 respectively and significantly different(P<0.05) from that of control group(0.96,the lowest amount).Finaly, mean fish total length in all groups wasn,t significantly different (P> 0.05). The results indicate that dietary probiotic Pediococcus acidilactici to 2 g per 10 kg of diet has positive effects on the growth of rainbow trout.]]>
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