Strategy for trout feeding with Aller aqua feeds
Authors: Bobel I. Y. , Pivtorak J. I. 
Published: April 2018

Due to the fact that the cost of forage for trout is up to 60% of all costs for its cultivation, the problem of rational use and saving has a special place. In the planned production the selection of the appropriate feed and feeding strategies are very important. Two extremely important coefficients of the indicator should be taken into consideration: coefficient of growth rate and fodder coefficient. The maximum growth rate is not correlates with the best fodder coefficient. All Allerg aqua production feeds are made in the form of ellipsoid granules. According to Aller aqua, the ellipsoid shape of the granules can significantly improve feed and, consequently, reduce its loss. When immersed in water, granular feeds at the expense of the ellipsoid form carry chaotic movements that attract fish to their capture. In addition, the granules of the ellipsoid form in the production process are better saturated with fat. Feeding trout it is necessary to take into account that the size of the granules for young fish in the length of 4–20 cm should be from 2.2 to 2.6% of the body length (according to Smith), which corresponds to the mouth opening size and the distance between the gill stamens in rainbow trout. The onset of feeding in time leads to the proper formation of the esophagus, which allows further intensive feeding. Provision of high quality fodder is one of the most important conditions for successful industrial fish farming. In conditions where the fish is devoid of natural food, the metabolism is controlled by humans and depends on the balance, quality and quantity of feed supplied to the fish. That is the reason of great opportunities for increasing the rate of growth of fish, with minimal expenses for mixed fodder, reducing the mortality of young fish, improving the quality of producers, and in general improving the efficiency of all fish farming processes. In order to determine with great accuracy the norms of feeding, it is necessary to carry out the control of weighing of fish. The size of the sample depends on the size of the pool and the amount of fish. The sampling should be from 50 to 100% of the general population in small containers and at least 1% in large pools. Fish is best fed often, in small portions. The smaller the fish, the more it needs to be fed. If necessary, it is needed to use special therapeutic granulated food or a mixture of therapeutic ingredients to add to the wet granules. Fish should be fed every day, since breaks lead to a decrease in its mass. It is necessary to create optimal conditions for cultivation and to carry out constant monitoring of water temperature and its fluctuations, oxygen content in water, pH, atmospheric pressure, etc. The impact of feed on the environment is also closely related to the value of the feed factor. The main products of fish metabolism that are isolated in aqueous medium, it is nitrogen and phosphorus. The Aller Aqua Feeding Program for trout includes the following: The amount of feed fed with trout depends on the temperature and size of the fish. These factors affect the amount of ration feeding.