From July 16 to the present, employees of NPTS RH LLP (head of the expeditionary unit – Makambetov S.Zh., acting head of exped. Bakkozha Zh.M., researcher – Bekturov D.E., junior researcher – Utegen S.A.) within the framework of budget program 021 (subprogram 100) and program 267 of the PCF, summer complex scientific research works are carried out at the Kapshagai reservoir and the Ile River.

The purpose of the work is to collect ichthyological, hydrobiological and hydrological data on monitoring points.

During the business trip, comprehensive scientific and research work is carried out on monitoring points, including the collection of ichthyological, hydrobiological and hydrochemical materials and samples, as well as conducting sonar surveys.

The chief specialist of the Kapshagai Fish Inspection Department of the Balkhash–Alakol Inter-regional Basin Fisheries Inspection (BAMBIRH) participates in the period of scientific research at the Kapshagai reservoir Sovetkhan S.S.

During the research period at the 9th station of the Kapshagai reservoir (coordinates: latitude 43°56’25.75″S, longitude 77°21’50.14″C) one specimen of the common perch was recorded with a body length of L – 23.3 cm, l – 20.3 cm and a weight of 202 g. This species is alien to the Balkhash-Alakol basin. Its appearance is probably due to the uncontrolled development of aquaculture.

The river or common perch Perca fluviatilis Linnaeus, 1758, lives everywhere, with the exception of the Balkhash-Alakol basin, where it is replaced by another species, the Talas River and the Syr Darya basin within the Shymkent region.

• Tuvodnaya pisces. It reaches puberty at the age of 1-3 years.
• It spawns in spring at a water temperature of 7-15 ° C. A phytophile.
• It lays eggs on plants in “garlands”, but sometimes also on the ground. Fertility – up to 900 thousand. Eggs.
• The food is mixed: zoobenthos and juvenile fish, including their own.
• Cannibalism is especially evident where there are no other fish. Commercial type