Hatchery escapement reports

Escapement is the total number of adult fish returning to a hatchery or stream to spawn. All numbers reported here represent preliminary estimates only.

The Washington Department of Fish and Wildlife (WDFW) In-Season Hatchery Escapement Report is posted weekly, usually each Thursday. It is a cumulative, or season-to-date, estimate of numbers of fish returning to hatchery facilities and other designated sites within Washington.The Escapement Report calculates how many fish return to hatchery racks or traps in rivers and streams during the spawning activity cycle beginning in approximately March of each year and ending in approximately March of the following year.

The information is generated from FishBooks, an internal WDFW online hatchery data application, and from reports received weekly from non-WDFW facilities.

The weekly report provides information on arrival and run timing, numbers returning to hatcheries and their distribution, and how many fertilized eggs were collected from those fish

Definitions

Facility: Location where fish are held. Most facility names are abbreviated to match standard names used for data sharing through the Pacific Salmon Commission.

Stock-BO: The assumed or known stock and origin of the fish returning to that river or stream. Brood origin (BO) can be assumed hatchery (H), wild (W), or unknown (U). For eggs, the origin can be mixed (M) when parents were hatchery and wild fish mixed, or integrated H and W origin.

Adult Total: Number of full-sized sexually mature fish handled at the facility.

Jack Total: Number of sexually mature male fish that return at a very small size. Coho and Chinook salmon produce the largest numbers of jacks.

Note: Adult and Jack total do not include live spawned fish as they are retained or returned to stream. Also, total does not represent total run to any given river or hatchery due to the presence of wild and hatchery stocks that may spawn below the hatchery rack; may die, or be harvested below the hatchery via sport, commercial, or tribal fisheries. This column also does not include fish that pass the trap/rack when it’s not in use, such as a temporary weir or fish collection facilities only used intermittently.

Total Eggtake: Estimated eggs taken to-date during spawning activities.

On Hand Adults: Estimate of live adults currently at the facility.

On Hand Jacks: Estimate of live jacks currently at the facility.

Lethal Spawned: Total adults and jacks lethal spawned.

Live Spawned: Total adults and jacks live spawned.

Released: Estimate of adults and jacks released or returned to the stream; either upstream or downstream. This includes estimates of fish that escaped upstream during high water or other rack/trap malfunction, and fish planted.

Live Shipped: Estimate of adults and jacks shipped to a WDFW facility or an external facility

Mortality: Total adult and jack mortalities- these are fish that died naturally

Surplus: Total adult and jack surpluses. These are fish in excess of broodstock or other needs that go to donations, foodbanks, nutrient enhancement, or are sold with revenues going to Regional Fisheries Enhancement Groups.