This report category contains primarily peak spawning ground counts. These counts usually represent the highest daily count of live fish in the given spawning area. Also included in this category are carcass counts, fish-days (the total number of fish days over an entire spawning season where a fish-day equals one fish present for one day), and fish per mile counts, which are simply peak counts divided by the miles surveyed in the index area. More technical information is available for this data category's database structure.