Abstract
Using freshwater resources of the mixed forest zone in Russia when growing larvae of crayfish belonging to the subfamily Astacinae in order to obtain a planting material (PMC) is considered in the framework of the functioning of the ecosystem that is formed in cages placed in surface layers of bodies of water. Aquatic vegetation, with which, according to the technical regulations, net cages are filled, creating shelters for larvae, is an autotrophic producer, whose consumers are organisms of benthic fauna chopping and detritizing it. Crayfish larvae in this ecosystem are heterotrophic macroconsumers that consume benthic invertebrates, vegetation, and detritus. The saprobic component of the ecosystem - microorganisms-destructors of dead organic matter are bacteria and fungi, some species of which cause mycoses of crayfish larvae. The studies conducted are devoted to determine the parameters of the functioning of the ecosystem formed in cages, providing the formation of fodder and other resources necessary for the cultivation of PMC.
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