Annual Number of Chinook Salmon Redds in the Cedar River Basin



Cedar River Chinook salmon typically spawn in the Cedar River from about the middle of September through the middle of November. During spawning, each female excavates a gravel nest (called a "redd") in suitable locations on the river bottom. Here, the female deposits her eggs which are fertilized by accompanying male Chinook. To quantify the annual number of Chinook returning to the Cedar River each year, biologist survey the river throughout this period to enumerate the number of newly created redds.


View full-sized graph >