Somatic and physiological responses to cyclic fasting and re‐feeding periods in sobaity sea bream (Sparidentex hasta,Valenciennes 1830) |
| |
| Authors: | M Torfi Mozanzadeh JG Marammazi M Yaghoubi V Yavari N Agh E Gisbert |
| |
| Institution: | 1. Fisheries Department, Faculty of Marine Natural Resources, Khoramshahr Marine Science and Technology University, Khoramshahr, Iran;2. South Iranian Aquaculture Research Centre, Ahwaz, Iran;3. Artemia and Aquatic Research Institute, Urmia University, Urmia, Iran;4. Unitat de Cultius Aquàtics, IRTA, Centre de Sant Carles de la Rápita (IRTA‐SCR), Sant Carles de la Rápita, Spain |
| |
| Abstract: | Different fasting and re‐feeding cycles were tested in a 60‐day trial in sobaity sea bream (Sparidentex hasta) 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. |
| |
| Keywords: | body composition fasting growth performance haematology re‐feeding Sparidae |
|
|
