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- Title
Nutrient and Energy Apparent Digestibility of Protein-Based Feed Ingredients and Effect of the Dietary Factors on Growth Performance and Feed Utilization of Sobaity Seabream, Sparidentex hasta.
- Authors
Zehra, Seemab; Laranja, Joseph Leopoldo Q.; Abulkasim, Aboobucker Siddik; Saleh, Reda; De Mello, Paulo H.; Pantanella, Edoardo; Alarcon, Jorge; Al-Suwailem, Abdulaziz M.; Al Shaikhi, A.; Glencross, Brett D.; Mohamed, Asaad H. W.
- Abstract
Simple Summary: The diet development process for new species includes various steps. Included among these is the investigation of the potential of different feed ingredients so that diets can be formulated with some flexibility to utilize a wider range of resources. Another step is the evaluation of existing diets (designed for other species) when fed to the new species being studied. The sobaity seabream, Sparidentex hasta, is considered a promising fish species for aquaculture in the Arabian Gulf region because of its good adaptation to culture, rapid growth, and high market value. This study investigated the responses to three existing commercial diets on the performance of the fish. Additionally, the digestibility of various locally available protein feed ingredients was also examined with the species. Our findings provide quantitative nutrient digestibility data for different feed ingredients and benchmark the responses of the fish to some locally available commercial diets. These findings provide a foundation to begin formulating nutritionally balanced diets for sobaity seabream from resources found locally. Two separate feeding trials were undertaken to benchmark a series of commercial diets and determine the nutrient and energy apparent digestibility coefficients of a variety of protein-based feed ingredients when fed to sobaity seabream, Sparidentex hasta. In Experiment 1, triplicate groups of fish (initial body weight: 330.5 ± 2.6 g) were fed with one of three locally available diets containing crude protein (CP) levels ranging from 44 to 46% of dry matter (DM), each with ~12% crude fat. Fish grew at around 3.2 g day−1 with a specific growth rate (SGR) of 0.7% day−1. Both the feed conversion ratio (FCR) and protein efficiency ratio (PER) were significantly better in fish fed diets, which contained the highest (46.4%) crude protein level. Overall, the data from these preliminary studies suggest that the best performance by sobaity seabream was obtained with a diet containing 46% crude protein, 20 MJ/kg, and a protein-to-energy ratio of 23 mg/kJ. In Experiment 2, fish with an initial body weight of 319 ± 7 g were held in 11 tanks and fed reference (D1) and test diets (D2–D11) for 7 days before fecal collection. This process was repeated twice in a blocking arrangement to generate three replicates. Each of the ten test diets contained 30% of a test ingredient, with the remaining 70% proportionally identical to the D1 diet. Diet apparent digestibility coefficients (ADCs) were measured, and the diet ADCs were then used to derive the protein and energy ADCs for the individual test ingredients. Ingredient protein ADC ranged between 75.5 and 93.9%, while ingredient energy ADC ranged between 66.8 and 81.2%.
- Subjects
PERSIAN Gulf; FISH feeds; FISH farming; MARKET value; BODY weight; DIET
- Publication
Animals (2076-2615), 2024, Vol 14, Issue 6, p933
- ISSN
2076-2615
- Publication type
Article
- DOI
10.3390/ani14060933