Netherlands: American crayfish in more places in Schieland

Published 2022년 9월 16일

Tridge summary

The article highlights the concerns of the Schieland and Krimpenerwaard Water Board regarding the presence of American crayfish in the Krimpenerwaard area, as revealed by their monitoring efforts. The crayfish, which cause damage to banks and reduce water quality by tunneling and eating aquatic life, have been found in varying numbers at different locations. The water board is planning to continue monitoring the situation and is hopeful that its findings could guide future actions, potentially including intensive capture of the crayfish. The monitoring involved setting up lobster traps at 114 locations across Schieland and the Krimpenerwaard in 2022.

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Original content

The change is mainly on the north side of the area and involves small numbers. The situation in the Krimpenerwaard is comparable to previous years. Twelve lobster baskets with bait are placed at each location for lobster monitoring. After one night, the baskets are emptied to count and measure the lobsters per species. By 2022, ten to forty lobsters were found in most locations. The largest numbers were found around Berkenwoude in the Krimpenerwaard and in Moordrecht in Schieland. Hoogheemraad: worrying 'The research results confirm that American crayfish live in a large part of our area. That is worrying, because the animals cause nuisance and damage, especially for farmers in the Krimpenerwaard', says Agnes van Zoelen of the Schieland and Krimpenerwaard Water Board. 'The lobsters dig tunnels and burrows, weakening banks, crumbling and creating more dredged material. They also eat many small aquatic animals and cut up aquatic plants that provide oxygen and clear water. All of ...

Source: Nieuwe Oogst