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Report: Bull Trout Spawner Escapement in the Salmo River Watershed: 2022 FWCP Project No. COL-F23-F-3699

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Bull Trout are a blue listed species of concern in British Columbia (BC) and have been designated as a high conservation concern in the Salmo River Watershed (Hagen, 2008). Salmo River Bull Trout are a fluvial population characterized by spawning in small, cold, high-gradient tributary streams with adult populations rearing in the mainstem of the River (Baxter and Decker, 2010).

Author:  Gerry Nellestijn and Scott Decker

Old Reference Number:  COL-F23-F-3699

Old Reference System:  FWCP - Fish Wildlife Compensation Program Columbia

Date Published:  Mar 2023

Report ID:  62411

Audience:  Government and Public

A radio Telemetry study by Baxter and Nellestijn (2000) found that individual Bull Trout spawned in multiple tributaries within the Salmo River watershed, suggesting that Salmo River Bull Trout comprise a single population. Conservation biology guidelines for Bull Trout recommend a minimum of 50-100 individuals to minimize inbreeding effects (Reiman & Allendorf, 2001). The Salmo River population is vulnerable to most of the major threats to Bull Trout population perseverance, including isolation from other populations and from productive rearing habitats, small population size, negative population growth, unfavorable thermal regimes in remaining habitats, and encroachment and competition by native and non-native species (Baxter and Decker, 2010; Hagen, 2008).

Report Type
  Fish and Aquatic Habitat Information
  Fish Species - Bull Trout - Salvelinus confluentus
  Region - Kootenay
  Fish and Fish Habitat - Monitoring

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