Fish reproduction in Krasnoarmeysk district of Saratov region in 2022

Abstract

One of the main factors influencing the efficiency of reproduction of limnophilic fish is the height of water level and the duration of spring flood with uniform water heating. Work was carried out to assess the natural reproduction of fish in the area of the middle zone of the Volgograd reservoir, near the villages Akhmat and Zolotoye, Krasnoarmeysk district, Saratov region, in 2022. In total, juveniles of 11 fish species were caught in the surveyed areas in 2022. There is a significant decrease in species diversity compared to previous years. Due to the unfavorable level regime during the spawning period, very unfavorable conditions for the reproduction of fish have developed in 2022. For the first time in 6 years of research in the waters under consideration, it was possible to record the reproduction of catfish (Silurus glanis) and carp (Cyprinus carpio). In 2022, in the area near Akhmat village, an anomaly was observed: underyearlings of bleak (Alburnus alburnus), which usually dominates catches, and perch (Perca fluviatilis), which is also common in this area, were absent in the catches (despite the fact that individuals of these fish of older ages were encountered). In the water area near Zolotoye village still recorded the reproduction of Black Sea-Caspian sprat (Clupeonella cultriventris), the early larvae of which are common there in the catches and are not found in the water area near Akhmat village. In the water area near Zolotoye village underyearlings of asp (Aspius aspius) are still common, and they dominate the catches in 2022. In the water area near Akhmat village, the catches of 2022 are dominated by crucian carp (Carassius gibelio).