Way to increase productivity of fish
Feeding fish with isoleucine-sprayed compound feed addresses the inefficiencies of existing methods by enhancing growth and reducing costs, resulting in improved fish productivity and product quality.
Patent Information
- Authority / Receiving Office
- RU · RU
- Patent Type
- Patents
- Current Assignee / Owner
- FEDERALNOE GOSUDARSTVENNOE BJUDZHETNOE OBRAZOVATELNOE UCHREZHDENIE VYSSHEGO OBRAZOVANIJA ROSSIJSKIJ GOSUDARSTVENNYJ AGRARNYJ UNIV - MSKHA IMENI K A TIMIRJAZEVA FGBOU VO RGAU - MSKHA IMENI K A TIMIRJAZEVA
- Filing Date
- 2025-07-07
- Publication Date
- 2026-06-30
AI Technical Summary
Existing fish productivity enhancement methods in aquaculture face challenges such as complex production processes, high labor intensity, equipment complexity, mineral losses, and variable chemical composition, leading to increased costs and reduced efficiency.
Feeding fish with a compound feed pre-sprayed with isoleucine dissolved in distilled water, followed by drying at 45-55°C for 2-3 hours, to enhance fish growth and health while reducing feed costs.
Significantly increases fish productivity, improves growth rates, reduces feed costs, and enhances the biological value of the resulting products.
Smart Images
Figure 00000001 
Figure 00000002 
Figure 00000003
Abstract
Description
[0001] The invention relates to agriculture and fisheries, in particular to aquaculture, fish farming and can be used to increase fish productivity and the quality of final fish farming products.
[0002] A known method for increasing fish productivity (patent RU 2796824) involves feeding a thin layer of feed pre-sprayed with ultrafine iron particles, 100±2 nm in size, obtained by high-temperature condensation with dispersed ultrasound in distilled water for 30 minutes at a frequency of 35 kHz, in an amount of 30 mg / kg of feed, and the probiotic preparation "Bifidumbacterin" dissolved in distilled water in an amount of 0.747 mg / kg of feed. A disadvantage of this method is due to the complexity of the production processes, caused by the complexity of high-temperature condensation with dispersed ultrasound in distilled water, characterized by high losses of minerals and the difficulty of process control.
[0003] A method for increasing fish productivity is known (patent RU 2826314), characterized by the fact that a thin layer of feed is sprayed with the enzyme preparation Glucavamorin in the amount of 0.5 g / kg of feed and the enzyme preparation Amylosubtilin in the amount of 0.5 g / kg of feed, previously dissolved in distilled water.
[0004] The common disadvantages of the above methods are high labor intensity and duration of the method, in addition, these methods use complex technological equipment for production and do not take into account the level of transition of feed components into the final aquaculture product, which affects their overall cost, as well as the complexity of production.
[0005] The closest to the invention in terms of the set of essential features, adopted as a prototype, is the method for preparing a feed product (according to patent RU 2789437), including feeding compound feed, characterized in that a thin layer of feed is sprayed with amino acids: arginine at a dose of 25 g / kg of feed, lysine at a dose of 21 g / kg, methionine at a dose of 10 g / kg, previously dissolved in distilled water, and ultradispersed SiO2 particles obtained by the method of plasma-chemical synthesis, with a size of 388 ± 117 nm, at a dose of 200 mg / kg of feed, pre-treated with ultrasound in distilled water for 30 minutes at a frequency of 35 kHz. The disadvantage of this method is the complexity of the production processes, high-temperature condensation of ultrasonic dispersed substances in distilled water, high losses of mineral substances and the difficulty of controlling the method, variable chemical composition and complexity of production.
[0006] The claimed invention is aimed at solving a technical problem caused by the creation of increased methods for increasing fish productivity, ensuring the production of high-quality raw materials and reducing losses.
[0007] The technical result of the invention is an increase in fish productivity, namely an increase in live weight, daily gains, improved health and a reduction in feed costs while simultaneously increasing the biological value of the resulting products.
[0008] To solve the technical problem and achieve the stated result, a method for feeding fish is proposed, which includes feeding a compound feed, a layer of which is pre-sprayed with isoleucine dissolved in distilled water taken in an amount of 10-30% of the total amount of isoleucine contained in the compound feed, the treated compound feed is dried in a thermostat at a temperature of 45-55°C for 2-3 hours and used for feeding.
[0009] Examples of specific implementation of the invention. For the experiment, compound feeds with specified quality parameters were prepared. The ratios of all feed components were calculated using the "Feed Optima" program. The fish were fed according to the experimental schedule presented in Table 1.
[0010]
[0011] Fish from each group were kept in a separate 100-liter aquarium. The conditions for all groups were identical and met the required technological parameters. Nile tilapia was chosen as the research subject. Fish performance results are presented in Table 2.
[0012]
[0013]
[0014] The hydrochemical parameters in all experimental tanks corresponded to the optimal parameters for growing tilapia: the temperature was maintained at 22.5±0.5°C, the oxygen content was 7.4±0.3 mg / L, the pH was within 7.2-7.6, and the ammonium nitrogen content did not exceed 0.25 mg / L.
[0015] Based on the 45-day culture period, significant differences in growth rates were observed between the control and experimental groups. In the variant supplemented with 30% L-isoleucine, the absolute weight gain was 26.8 g, which is 33.9% higher than in the control group (20.0 g). The average daily weight gain in the third experimental group reached 0.59 g / day, while in the control group this figure was 0.44 g / day.
[0016] Feed efficiency data showed that L-isoleucine supplementation significantly reduced feed costs. Feed conversion ratio in the experimental groups decreased from 1.29 in the control group to 0.96 in the 30% amino acid supplemented group, representing a 25.6% improvement in feed digestibility. A similar trend was observed for protein consumption for growth: in the control group, this indicator was 0.59 g / g, while in the experimental groups, it decreased proportionally with increasing L-isoleucine dosage, reaching 0.44 g / g with 30% supplementation.
[0017] Fish productivity in the rearing system also showed positive dynamics with the use of isoleucine supplementation. In the control group, this indicator was 243.2 g / m3. 3 / day, while in the experimental groups it increased to 295.2, 294.4 and 325.6 g / m 3 / day, respectively, which indicates a significant increase in the productivity of the growing system when using isoleucine.
[0018] The study results demonstrate that adding isoleucine to fish diets has a significant positive effect on growth performance and feed efficiency. The most pronounced effect was observed with the addition of 30% isoleucine of the total isoleucine content in the feed, resulting in a 33.9% increase in absolute weight gain compared to the control, a 25.6% reduction in feed costs, and a 25.6% reduction in protein costs.
[0019] Compared to the prototype, the proposed method will ensure an increase in fish productivity, namely an increase in live weight, daily gains, improved health, and a reduction in feed costs while simultaneously increasing the biological value of the resulting products.