Abstract
The article discusses prospects for use of the theory of adaptogens in demand in medicine and in the fish breeding practice. The obtained results show that the adaptogens use at the early stages of catfish ontogenesis (Clarias Gariepinus, Burchell 1822) can cause the condition of nonspecific increased resistance and expand the adaptive flexibility range of this specie. Adaptogen trekrezan used in our experiments (Oxyethylammonium methylphenoxiacetate) is a synthetic analogue of the natural ginseng. Its application in the embryo culture process has shown positive results. It has reduced the level of the developmental anomaly, increased the first stage larvae hatching and their viability, significantly decreased the mortality rate and reduced the level of cannibalism common for catfish larvae. We have determined that the larvae breeding in the trekrezan medium has considerably increased their growth rate, and weight gain. The obtained results are new, and the adaptogens use at the early stages of ontogenesis in industrial catfish aquaculture is recommended. The Russian Foundation for Basic Research has supported our study with the grant No. 18-416-730005.
Highlights
Catfish is a prospective object of high-tech industrial aquaculture
Since 1994, Russia has introduced the catfish into industrial aquaculture but they are still not widespread
We have studied the effectiveness of the trekrezan use to increase the resistance and expansion of catfish adaptive flexibility at the early stages of ontogenesis in high-tech industrial aquaculture
Summary
Catfish is a prospective object of high-tech industrial aquaculture. This type of fish has a high growth rate. It is hardy, adapted to high-density holding and has an epibranchial organ. This organ allows breathing the ambient oxygen. Catfish is a well-known object of fish breeding in Asia, Africa, Europe and America [1]. Since 1994, Russia has introduced the catfish into industrial aquaculture but they are still not widespread. The climatic conditions in most regions of Russia do not allow catfish breeding in natural reservoirs; we use the recirculating aquaculture system to grow them
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