So-called fish ladders can be built near dams. These ladders help fish to reach their spawning locations upriver. Halinen, Turku.

© Juha-Pekka Salminen & e-Oppi Oy

Tämän kuvan tekstivastine: (tyhjä tekstivastine)

kalaporras_halinen_turku_2_jsalminen.JPG 444.8 kt