NuSEDS - New Salmon Escapement Database System

Study Extent

The Salmon Escapement Database (NuSEDS) is the DFO Pacific Region’s central database that stores individual spawner survey data records, spawner abundance estimates and the linkages between the two. The dataset here only includes the escapement estimates from 1920-2020. Escapement refers to salmon that have escaped past all sources of exploitation to spawn.

Sampling

Annual escapement estimates are based on geographic locations and distinct salmon populations. Area Biologists and escapement analysts provide SIL (stream inspection logs) and SEN (summary estimate narratives) data which are uploaded or entered directly into the NuSEDS database post season. There are several standard methods to chose from to calculate the summary estimate narratives: Addition/Subtraction - simple addition or subtraction to provide an estimate. Should be used in conjunction with activity types Adjustment/Calibration and Summary observations. E.g. a population aggregate, the sum of two or more populations, would require the linking of two or more SENs and straight summation of the estimates. Multiplication/Division - simple multiplication or division to summary estimates. This method should be used in conjunction with activity type Adjustment/Calibration. E.g. An annual estimate that was arrived at by Peak Live Plus Dead analysis can be adjusted by some factor to make it equivalent to a Time Series estimate that uses AUC calculations. Area Under the Curve - Combining a series of point estimates for abundance to create an estimate for the annual abundance. This is done by determining the total area under a curve of abundance by time then dividing by the survey life (the average length of time that an individual is available to be observed alive i.e. is still within the survey area and is not dead). Peak Live Plus Dead - Examine point estimates for abundance, determine the survey when the maximum live count observed; sum the live and dead counts for that survey to create the annual estimate. Peak Live Plus Cumulative Dead - Examine point estimates for abundance, determine the survey when the maximum live count observed. Sum the live count for that survey with the cumulative total of the dead counts prior to and including that survey to create the annual estimate. Fixed Site Census - Combining one or more raw observations into a single estimate (e.g. add all daily fence observation SIL to create a single annual estimate). Mark and Recapture - Petersen - Use capture and re-capture SIL data to determine an abundance estimate with the Petersen calculation. Mark and Recapture - Jolly-Seber - Use capture and re-capture SIL data to determine an abundance estimate with the Jolly-Seber calculation. Redd Count - Using counts of redds from SILs and multiplied by a factor such as 2. Lake Expansion - expanding the dead recoveries by the recovery effort

Quality Control

Scientific names associated with resource occurrence records have been mapped to recognized standards - marine taxa have been mapped to the World Register of Marine Species (WoRMS). Standardized vocabulary and ID's are used where possible from the NERC Vocabulary Server (NVS).

Method steps

1. This resource was created for OBIS Canada. Records were extracted from the New Salmon Escapement Database System (NuSEDS) (Salmon Data Unit, Science Branch, Pacific Region, Fisheries and Oceans Canada) and processed into DwC-A format and uploaded to the IPT using R. Scientific name matching with WoRMS was done using the R package "worrms".

Pacific Salmon, including lake bound Sockeye (Kokanee), and Steelhead Trout found in spawning grounds in British Columbia and the Yukon Territory, Canada

1. Salmo
   rank: genus
2. Oncorhynchus
   rank: genus

Pacific Ocean, British Columbia, Yukon Territory, Vancouver Island, Haida Gwaii