Evaluation of the effectiveness of feeding fish using electro-optical devices in fish farms of the Volgograd region

Abstract

For intensive fish farming on fish farms, the food supply is a decisive condition. But the fodder base of reservoirs is not an unlimited resource, and compound feed is becoming more expensive and not always available. One of the solutions to this problem can be attracting flying insects to the surface of water bodies. Light traps of various models are increasingly used to attract insects at twilight and at night. The experiment used an experimental mobile electro-optical installation for the destruction of flying insects with an optical converter of the ultraviolet spectrum, a structure to which a high-frequency electric voltage is applied and a screen for collecting insects. The light trap attracts different species of insects, which also differ in their food value for fish. Nevertheless, natural food provides a good supplement with sufficient amounts of essential nutrients and energy. As a result of the obtained experiment, a species analysis of arthropods attracted by a light trap was carried out. The most active ones were representatives of the order Diptera, from the families of chironomids (bell mosquitoes) and midges (river midge). Representatives of the leafhopper family from the order of Hemiptera (bugs) also showed high activity. Chironomids are an important component of food for larvae and fry of fish, especially carp species. The proposed installation can operate in a mixed discrete mode, actively attracting flying insects without affecting them by high voltage, which contributes to the intensification of the development of food organisms.