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<p>There may be differences in marine migratory patterns between Gaspereau River (GR), Nova Scotia, Canada, Atlantic salmon and salmon originating from other rivers in the inner Bay of Fundy (iBoF) Designatable Unit (DU). Marine migratory patterns are one of several metrics used by managers to determine if the GR Atlantic salmon should remain in the Species At Risk Act protected iBoF DU or if it should be included within the outer Bay of Fundy (oBoF) DU. In this study, 25 female Atlantic salmon kelts of GR genetic strain were obtained from the Coldbrook Biodiversity Facility. The kelts were tagged with acoustic tags and released at the mouth of the GR in May 2019. Of the 25 kelts, 10 were recorded at acoustic receivers on the Scotian Shelf. Five kelts returned to the GR and were recaptured, found to be ripe, and deemed to be consecutive spawners. This included a kelt that logged onto receivers on the Scotian Shelf during June and July, before returning to the GR in October. Depth and migration speed indicated that three kelts may have suffered predation in the oBoF or on the Scotian Shelf, with the tags ingested by a predator. Four kelts moved rapidly out of the Bay of Fundy (BoF) and past the Halifax Line of acoustic receivers in early June 2019. This group migrating early and at characteristic oceanic migratory speeds may represent kelts moving to distant feeding grounds. If so, GR Atlantic salmon may be the only river population in the iBoF inclined to escape high coastal mortality regions for distant oceanic feeding grounds.</p>

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Marine migratory patterns of Atlantic salmon (Salmo salar) kelts from the Gaspereau River, Inner Bay of Fundy, Nova Scotia, Canada

  • 期刊论文

  • 发表日期：

    2026年5月16日

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  • Montana F. McLean,
  • David C. Hardie,
  • Jeffrey M. Reader,
  • Elizabetha Tsitrin,
  • Keeler Colton,
  • Bowen Stokesbury-Price,
  • Matthew G. Warner,
  • Beth Lenentine,
  • Michael J. Dadswell,
  • Michael J. W. Stokesbury

摘要

There may be differences in marine migratory patterns between Gaspereau River (GR), Nova Scotia, Canada, Atlantic salmon and salmon originating from other rivers in the inner Bay of Fundy (iBoF) Designatable Unit (DU). Marine migratory patterns are one of several metrics used by managers to determine if the GR Atlantic salmon should remain in the Species At Risk Act protected iBoF DU or if it should be included within the outer Bay of Fundy (oBoF) DU. In this study, 25 female Atlantic salmon kelts of GR genetic strain were obtained from the Coldbrook Biodiversity Facility. The kelts were tagged with acoustic tags and released at the mouth of the GR in May 2019. Of the 25 kelts, 10 were recorded at acoustic receivers on the Scotian Shelf. Five kelts returned to the GR and were recaptured, found to be ripe, and deemed to be consecutive spawners. This included a kelt that logged onto receivers on the Scotian Shelf during June and July, before returning to the GR in October. Depth and migration speed indicated that three kelts may have suffered predation in the oBoF or on the Scotian Shelf, with the tags ingested by a predator. Four kelts moved rapidly out of the Bay of Fundy (BoF) and past the Halifax Line of acoustic receivers in early June 2019. This group migrating early and at characteristic oceanic migratory speeds may represent kelts moving to distant feeding grounds. If so, GR Atlantic salmon may be the only river population in the iBoF inclined to escape high coastal mortality regions for distant oceanic feeding grounds.