Bridge as fish-counting construction
The bridge across the Ozernaya spawning river (South-Eastern Kamchatka) has been used as a fish-counting construction where visual registration, as well as photo- and video surveys of migrating sock-eye salmon (Oncorhynchus nerka), were carried out from. The paper contains the data on the species stock size (about 1 million specimens) running into the river, and on the fish migration speed.