This report category contains estimates of the total number of spawners (live fish) returning to the given location. These estimates are usually derived from redd count or other index area count expansions. Life stages included in these counts are adults, jacks, or a combination of both life stages; the life stage is generally presumed to be adult unless specified in the source documentation. The principal sources of these data are published agency reports, and unpublished agency files and data bases. More technical information is available for this data category's database structure.