CAUTION- All Numbers represent preliminary estimates only
August 16, 2012
Escapement - The total number of adult fish returning to a hatchery or stream to spawn
The Washington Department of Fish and Wildlife (WDFW) In-Season Hatchery Escapement Report is posted weekly by the Fish Program/Science Division, usually each Thursday.
The report is a cumulative, or season-to-date, estimate of numbers of fish returning to WDFW hatchery facilities and cooperative projects within Washington State. It enumerates fish returning to hatchery racks or traps in the 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 which cannot be connected to FishBooks due to the Agency firewall.
The weekly report provides information on arrival and run timing, numbers returning to hatcheries and their distribution, and eggtake.
This report is organized by species, run, and facilities listed by WRIA, or geographical location.
Column heading descriptions:
Facility: location where fish trapped or being 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 facility that’s 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 to a contact buyer with revenues going to Regional Fisheries Enhancement Groups.
Date: date of last adult and/or jack fish encounter or activity reported in FishBooks, or on a weekly report from non FishBooks.
Comment: comments, if applicable