Ligger one calls a pontoon-like wooden bottom structure for the supply attitude of living fish, particularly in rivers and of the Baltic Sea.

The Ligger is like a bottom structure arranges into at least three sections is divided. While the front and rear section are waterproof and provide for the lift, the walls of the middle section for the keeping of the fish are perforated. Around a sufficient supply of the fish with fresh water to, the Ligger in the flowing water e.g. at river bank or air-locks reaches was preferably fastened, so that it was flowed through by water. Frequently could be able to hold this middle section with loose bulkhead to be partitioned around different fish types separately from each other. In Pommern Ligger were into the first decades 20. Century common. They were then replaced by fresh water-flowed through basins, which are less sensitive to environmental influences such as ice pressing.

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