title: HARVESTABLE STOCK OF BLOODWORMS (CHIRONOMUS: DIPTERA) IN SOME LAKES OF THE LENINGRAD REGION
abstract: The harvestable stock of bloodworms (Chironomus sp.) has been investigated in some lakes of the Leningrad Region since 2010. Bloodworms were detected in 45 out of 51 lakes surveyed. Abundances sufficient for commercial harvesting of larvae were found in lakes Pobednoe and Vishnevskoe. Mean annual stocks in these lakes were 31 and 90tons. The highest recorded concentration was 311 tons in Lake Vishnevskoe in 2014 and the lowest concentration was 4.5 tons in Lake Pobednoe in 2020. Regular commerci
journal: Proceedings of the Karelian Research Centre of the Russian Academy of Sciences