The spawning run of the huchen Hucho hucho (L.) and its analysis

The huchen in the Dunajec River basin begin their spawning migration and spawning at the end of the 1st decade of April (2-3 weeks after snow has melted), when the water temperature is 7-8°C. The spawners migrate in the night, with the largest and oldest individuals appearing first in the tributaries. With time the size of the subsequently spawning fishes becomes smaller and smaller. The migration intensity depends on the temperature of the water and its levels in the spawning streams.

Abstract licence: CC BY

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