Seyed Mohammad Mousavi; Fereshteh Ghaeidi; Nasim Zanguee; Mohammad Zakeri
Abstract
Abstract
In this study, the effect of dietary intake of different levels of Cumin (Cuminum cyminum) extract on juveniles of Cyprinus carpio, was studied. For this purpose, 150 common carp juveniles (with mean weight: 20.3±0.89 gr) were randomly distributed in 15 fiberglass tanks (10 fish per ...
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Abstract
In this study, the effect of dietary intake of different levels of Cumin (Cuminum cyminum) extract on juveniles of Cyprinus carpio, was studied. For this purpose, 150 common carp juveniles (with mean weight: 20.3±0.89 gr) were randomly distributed in 15 fiberglass tanks (10 fish per tank) and fed by commercial diet containing 0% (control group), 0.5%, 1%, 1.5% and 2% of ethanolic cumin extract (treatment groups). The fish were fed by apparent satiation thrice the day for 8 weeks. At the end of the experimental period, different growth parameters including weight gain, Daily growth rate, Specific Growth Rate, some condition factors, viscera somatic index, hepatosomatic index and nutritional indices including food conversion ratio, protein efficiency ratio, lipid efficiency ratio, total feed intake, net protein utilization, net lipid utilization were assessed. The results showed that administration of different levels of cumin extract in diets of juveniles of Cyprinus carpio caused an increasing effect on weight gain, daily growth rate and specific growth rate (P<0/05) compared to control group. The highest rate of these factors was observed in diet containing 2% of cumin extract and the lowest rate was for control group. According to the results of this study supplementation of 2% cumin extract to diet of juveniles of Cyprinus carpio may improve growth parameters and this herbal extract may presented as a growth promoter in carp culture.
Behrooz Heidari; Sanaz Avarjeh; Hasan Taghavi Jelodar
Volume 4, Issue 2 , December 2015, , Pages 25-35
Abstract
Environmental factors including salinity and temperature can affect the physiology and performance of the growth of fish, so many of internal organs such as gill may be showed wide range of morphological and functional changes. Fingerling common carp were exposed for 21 days in groups at 20, 25 ...
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Environmental factors including salinity and temperature can affect the physiology and performance of the growth of fish, so many of internal organs such as gill may be showed wide range of morphological and functional changes. Fingerling common carp were exposed for 21 days in groups at 20, 25 and 30°C and three salinity levels 0, 5 and 10ppt. Histological changes of gills tissue of common carp with average weight and length 38.28 ± 0.58 g and 14.04 ± 0.10 cm respectively is studied. After biometry, sampling was performed on 7 and 21 and transferred to the laboratory. The gill arc was fixed in Bouin's solution for 24-48 hours. To evaluate the chloride cells in the gill tissue of the fish, PAS-hematoxylin were used. The results showed that the size and number of chloride cells increased by increasing the temperature and salinity. The maximum number and size of chloride cells was observed at treatment with temperature 30 °C and salinity 10ppt. In conclusion, it could be stated that the number and size of chloride cells in the gill were affected by combined environmental factors, salinity and temperature.
