Abstract
The article represents the results of studies in zeolite use in fish feeding. The influence of zeolites on the exterior and interior characteristics of African catfish grown in high-technological industrial aquaculture was evaluated. Zeolites were introduced into fish feed in the amount of 3 % and 5 %. The use of zeolites in feeding of African catfish has had a positive impact on the growth, exterior and interior indicators of fish. In five-month-old catfish, when using zeolites, the average daily growth increased by 4.15 g (with 3 % addition of zeolites) and by 4.68 g (with 5 % addition of zeolites), compared to fish that did not receive zeolites. In the experimental groups, there was also an increase in absolute growth by 124.4 g-with 3 % addition of zeolites and 140.2 g-with 5 % addition of zeolites. The commercial weight of fish using zeolites increased by 24.05 % and 35.52 %, respectively. The results show that when growing commercial fish, the use of zeolites in the feed composition fastens its growth and significantly reduces feed costs. 1
Highlights
Fish is one of the main food products of population of our planet
Aquaculture is understood as breeding, maintenance and cultivation of fish in natural and artificial reservoirs, on marine plantations, in industrial aquaculture, including in recirculating aquaculture systems (RAS)
The dynamics of morphometric characteristics in catfish depending on the content of zeolites in used feed was studied
Summary
Natural fish resources, with increasing amounts of fishing, do not have time to be replenished In this regard, there is a need to increase the extent of managed reproduction of fish resources. Zeolites are widely used in agriculture in Russia and other countries [7,8,9,10] They are used as sorbents [3, 5, 7, 10, 11], which have proven themselves well in animal husbandry, poultry farming, crop production and other agricultural sectors. Cases of their use in cultivation of European sea bass, rainbow trout and many other fish species were described [3, 11,12,13, 14]; the use of zeolites for cleaning the aquatic environment from various pollutants is no less important [11,12,13,14,15,16,17]
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