Somatic and physiological responses to cyclic fasting and re-feeding periods in sobaity sea bream (m>Sparidentex hastam>, Valenciennes 1830)

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• 作者：M. Torfi Mozanzadeh ; J.G. Marammazi ; M. Yaghoubi ; V. Yavari ; N. Agh and E. Gisbert
• 刊名：Aquaculture Nutrition
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：23
• 期：1
• 页码：181-191
• 全文大小：1034K
• ISSN：1365-2095

文摘

Different fasting and re-feeding cycles were tested in a 60-day trial in sobaity sea bream (m>Sparidentex hastam>) juveniles to evaluate their effects on growth, physiological and biochemical parameters. Fish were exposed in triplicate to the following feeding regimes: control (fed everyday); F-RF₁₊₁ (1 day of starvation followed by 1 day of re-feeding); F-RF₂₊₂ (2 days of starvation followed by 2 days of re-feeding); F-RF₃₊₃ (3 days of starvation followed by 3 days of re-feeding); F-RF₆₊₆ (6 days of starvation followed by 6 days of re-feeding); and F-RF₁₊₂ (1 day of starvation followed by 2 days of re-feeding). A reduction in body mass between 10.0% (F-RF₁₊₁) and 24.3% (F-RF₆₊₆) was found in comparison with the control group after 60 days. As the length of fasting increased, the compensation coefficients in feed intake and weight gain decreased. Body lipid content decreased as fasting cycles increased. Haemoglobin, plasma protein, lysozyme and alkaline phosphatase activities were the most reliable biomarkers for assessing the nutritional condition in sobaity sea bream. A feeding strategy based on 1 day of starvation followed by 2 days of re-feeding (F-RF₁₊₂ group) may be advisable for on-growing sobaity sea bream without reduction in growth and alteration of their haematological and physiological parameters.