Impact of muddy waters to salmon spawning beds and river conservation study on the Karasu-kanagawa River

Abstract

In recent years, upstream movement of salmon has been confirmed on the Tonegawa River system and Karasu- kanagawa River, which attracted interest in citizen. Therefore, field surveys have been carried out to study salmon spawning ground since 2007.

This paper shows that the impact of muddy water from river conservation work on salmon egg by conducting field test was small.