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Effect of Spirulina platensis and Azolla nilotica as feed additives on growth performance, antioxidant enzymes and fecundity of Oreochromis niloticus | ||
| Iranian Journal of Fisheries Sciences | ||
| دوره 20، شماره 3، مرداد 2021، صفحه 846-862 اصل مقاله (473.4 K) | ||
| نوع مقاله: Research Paper | ||
| شناسه دیجیتال (DOI): 10.22092/ijfs.2021.124136 | ||
| نویسندگان | ||
| Amira Abd El-daim1؛ Amel El Asely1؛ Mohamed Kandiel2؛ Eman Abd El-Gawad1؛ Hiam Elabd1؛ Adel Shaheen* 1؛ Amany A. Abbass Abbass1 | ||
| 1Department of Aquatic Animals Diseases and Management, Faculty of Veterinary Medicine, Benha University | ||
| 2Department of Theriogenology, Faculty of Veterinary Medicine, Benha University | ||
| چکیده | ||
| This study was conducted in two experiments. Experiment 1 aimed to investigate the growth promoting and anti-oxidative effects of Azolla nilotica (AZN) and Spirulina platensis (SP) in Oreochromis niloticus.Seven fish groups (G1-G7), each in three replicates, were fed a basal diet (control), AZN 5%, AZN 10%, SP 0.5%, SP 1%, a mixture of Azolla nilotica 5% and Spirulina platensis 1% (AZN 5 %-SP 1% mix), and a mixture of Azolla nilotica 10% and Spirulina platensis 1% (AZN 10% - SP 1% mix), respectively, for 3 months. The results showed a significant increase in growth indices (weight gain, specific growth rate, average length gain, feed efficiency ratio), and a decrease in the feed conversion ratio in all supplemented groups compared to control. Hepato-somatic index in G4 and G5 groups, and intestinal-somatic index in G4 - G6, and in G5 and G6 were obviously higher than control. Spleno-somatic index and antioxidant enzymes (GSH-px, SOD and CAT) markedly increased in G5 and G6 compared to control. Significant increase (p <0.05) in white blood cells was recorded in G2 and G4. Experiment 2 verified the effect of one-month supplementation of SP 1% on males and females O. niloticus fecundity. Males fed with SP 1% had an enhanced fertility as indicated by an increase in sperm density, spermatozoa motility and livability rates compared with the control. There was a significant increase in eggs number and the fecundity index in unripe females and a tendency of egg size to increase in ripen fish. It could be concluded that SP 1% and AZN 5% supplementation is advantageous to improve O. niloticus growth and fecundity. | ||
| کلیدواژه‌ها | ||
| Antioxidant enzymes؛ Azolla nilotica؛ Growth parameters؛ Fecundity؛ Nile tilapia؛ Spirulina platensis | ||
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آمار تعداد مشاهده مقاله: 385 تعداد دریافت فایل اصل مقاله: 293 |
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