BIOLOGY CENTRE CAS | Monitoring the spawning of Pikeperch in Lipno Reservoir using artificial nests

Monitoring the spawning of Pikeperch in Lipno Reservoir using artificial nests

Spring is the most favorable time for reproduction for many organisms, and the pikeperch (Sander lucioperca) is no exception. Every year around this time, pikeperch pairs migrate to the shallower parts of the Lipno Reservoir to spawn and ensure the survival of the next generation. As in previous year, the South Bohemian District of the Czech Anglers´ Union, in cooperation with the Biology Centre of the Czech Academy of Sciences, is monitoring the spawning process during April and May using artificial nests.

Observations from Lipno and other waterbodies show that pikeperch readily accept artificial substrates made from chimney brushes. Many of these nests are occupied for several weeks, allowing scientists and fisheries managers to carefully observe egg incubation and determine whether the guarding male pikeperch is being targeted by fish-eating predators. This monitoring also provides valuable information on the timing of spawning, preferred habitats, and expected reproductive success.

Artificial nests are marked on the water surface with white buoys labeled "Spawning Area – No Fishing" ("Trdliště - zákaz rybolovu). We kindly ask all anglers and visitors to avoid these locations and not to interfere with the buoys in any way. Unqualified interference can cause the guarding male to abandon the nest, leading to the loss of the entire egg clutch. By respecting these guidelines, we help protect one of the key fish species of the Lipno Reservoir and support the stability of its population for the future.