The document is a set of methodological recommendations issued by the national fisheries research authorities on the stocking of natural fishing waterbodies. It provides a regulatory and scientific framework for increasing fish populations in lakes, reservoirs, rivers, and canals through planned stocking activities. The guidelines define key concepts, identify the objectives of stocking — such as enhancing fish productivity, improving catch quality, supporting recreational fishing, conserving biodiversity, restoring rare species, and conducting biological reclamation—and classify waterbodies according to their ecological characteristics to determine suitable fish species for introduction. The recommendations establish technical requirements for stocking material, including minimum fish sizes and age groups, health standards, species selection criteria, and permissible stocking densities. Detailed tables specify which species are appropriate for different lake and river categories, including pike, pike-perch, catfish, whitefish, vendace, eel, sterlet, trout, tench, crucian carp, and herbivorous fish used for biological control. The document provides formulas for calculating stocking volumes based on habitat area and food resources, together with recommended stocking rates for waters of varying productivity levels. A significant portion of the document focuses on the transportation and release of fish, eggs, and larvae. It describes temperature requirements, oxygen supply standards, transport containers, allowable loading densities, and mortality limits during transport. The guidelines also recommend optimal seasons and methods for stocking different species, emphasizing spring stocking for warm-water fish and autumn stocking for cold-water species. Additional instructions cover site selection for releases, dispersal techniques for predatory fish, protection of stocked fish after release, and procedures for stocking with fertilized eggs. Numerous annexes provide operational tables on stocking densities, transport norms, and species-specific technical parameters to support practical implementation.
Беларусь · 2022-01-01