کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5539099 | 1552806 | 2018 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reproductive efficiency and egg and larvae quality of Nile tilapia fed different levels of vitamin C
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علوم کشاورزی و بیولوژیک
علوم آبزیان
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The objective of this study was to evaluate the effect of dietary supplementation with vitamin C (0, 261, 599 and 942Â mg/kg diet, analyzed values) (ascorbyl monophosphate) on reproductive efficiency and egg and larvae quality of Nile tilapia (Oreochromis niloticus) through morphometric measurements, air exposure tests of newly hatched larvae (40 and 50Â min), and incubation of larvae during the lecithotrophic period in different salinities (0 to 6Â g of salt/L). A higher gonadosomatic index and greater egg weight and larval measurements were found for 599 and 942Â mg vitamin C/kg diets. The hepatosomatic index and total and relative fecundity were highest for females receiving a 599Â mg vitamin C/kg diet. The lowest values for egg diameters (largest and smallest) and morphometric measurements of larvae at 120Â h after hatching were observed for those from females fed a diet without vitamin C. Increased hatching rate and egg and larvae production per female were directly related to increasing levels of vitamin C. Haematocrit, erythrocytes, leukocytes and total plasma protein were lower in females that did not receive vitamin C. The lowest glucose concentrations were detected after the reproductive period with the 942Â mg vitamin C/kg diet, while the highest concentrations were observed with the 0Â mg vitamin C/kg diet. When eggs were incubated at different salinities, the lowest survival rate occurred with the 0Â mg vitamin C/kg diet at the end of 120Â h of incubation. In the tests of exposure to air for 40 and 50Â min, the resistance to stress by newly hatched larvae was greatest for those individuals from females receiving the 942Â mg vitamin C/kg diet, intermediate with the 599Â mg vitamin C/kg diet and lowest with the 0 and 261Â mg vitamin C/kg diets. It was concluded that the addition of a minimum 599 vitamin C/kg to the diet optimized reproductive parameters, blood variables and quality of eggs and larvae of Nile tilapia.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Aquaculture - Volume 482, 1 January 2018, Pages 96-102
Journal: Aquaculture - Volume 482, 1 January 2018, Pages 96-102
نویسندگان
Nilda L.A.F. Sarmento, Edenilce F.F. Martins, Deliane C. Costa, Cristiano C. Mattioli, Gustavo S. da Costa Julio, Luis Gustavo Figueiredo, Marcelo R. Luz, Ronald Kennedy Luz,