Effect of a New Feed Daphnia magna (Straus, 1820), as a Fish Meal Substitute on Growth, Feed Utilization, Histological Status, and Economic Revenue of Grey Mullet, Mugil cephalus (Linnaeus 1758)
| Autor: | Walaa F. Alsanie, Othman F. Abdelzaher, Mohamed A. Elokaby, Mohamed M. M. El-feky, Ahmed Gaber, Abdallah Tageldein Mansour, Mohamed L. Ashour, Mohamed M. Mabrouk, Hamdy A. Abo-Taleb |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2021 |
| Předmět: |
Geography
Planning and Development Daphnia magna TJ807-830 Management Monitoring Policy and Law TD194-195 Feed conversion ratio histomorphometry Renewable energy sources Mullet 03 medical and health sciences Fish meal Animal science substitution medicine GE1-350 030304 developmental biology economic revenue 0303 health sciences Meal growth performance Environmental effects of industries and plants biology Renewable Energy Sustainability and the Environment Mugil 04 agricultural and veterinary sciences biology.organism_classification Daphnia Environmental sciences flathead grey mullet 040102 fisheries 0401 agriculture forestry and fisheries Flathead grey mullet medicine.symptom Weight gain |
| Zdroj: | Sustainability Volume 13 Issue 13 Sustainability, Vol 13, Iss 7093, p 7093 (2021) |
| ISSN: | 2071-1050 |
| DOI: | 10.3390/su13137093 |
| Popis: | The formulator of aquatic diets is part of a continuous search for alternative protein sources instead of depreciated fish meal. The utilization of zooplankton as a feed ingredient is an interesting trend due to their high-quality protein content and abundance of essential nutrients. The current study aims to investigate the effects of partial and total replacement of fish meal (FM) by Dahpnia magna meal (DMM) on growth performance, feed utilization, histological, and economic status of mullet, M. cephalus, larvae. In addition to the control diet, 100% FM, D0, four diets containing DMM at different levels were used: 25% (D25), 50% (D50), 75% (D75), and 100% (D100) replacement of fish meal. A total of 300 larvae (0.097 ± 0.001 g) were equally divided into five groups (three replicate per each group) at a density of 200 larvae m−3. The aquariums were renewed at a rate of 30% daily. During the 60-day experimental period, all larvae were fed their respective diets at a level of 20% of live body weight, five times a day (9.00 a.m., 12.00, 15.00, 18.00, and 21.00 p.m.). The results indicated that compared to D0, fish fed D75 recorded the highest significant value of growth, and feed utilization parameters, while fish fed D100 achieved the lowest feed cost and incidence cost, and the highest profit index and economic efficiency ratio. A strong correlation was reported among weight gain, feed conversion ratio and fish meal replacement with DMM R2 = 0.94 and 0.91, respectively. The fit regression model representing mullet response to FM replacement with DMM is a poly-nominal regression model with maximum response at 75–100%. The histological investigation of the intestine revealed an improvement of histomorphometric indices and goblet cell number with increasing DMM inclusion levels. These findings confirmed that 75% to 100% partial substitution of FM with DMM is the ideal replacement for mullet, M. cephalus, larvae for improving fish growth performance and feed utilization. |
| Databáze: | OpenAIRE |
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