Habitat-based reference points for Saint John River Alewife, upstream of the Mactaquac dam
- Language of the publication
- English
- Date
- 2024
- Type
- Report
- Author(s)
- Canadian Science Advisory Secretariat
- Canada. Department of Fisheries and Oceans. Maritimes Region
- Publisher
- Center for Science Advice (CSA), Maritimes Region, Fisheries and Oceans Canada, Bedford Institute of Oceanography
Alternative title
Habitat-based reference points for Saint John River Alewife
Abstract
Reference points were developed for the Saint John River Alewife stock subunit upstream of the Mactaquac Dam, in accordance with a previously peer-reviewed framework for the development of reference points for Alewife based on estimated nursery area and the median habitat carrying capacity per unit area. A nursery area of 58,676 acres, the sum of all habitat characterized as accessible or potentially accessible, was used to calculate reference points. This nursery area includes all accessible or potentially accessible nursery area above Beechwood, Tobique, and Tinker dams in New Brunswick. At 195 kg/acre, the spawning stock biomass in the absence of anthropogenic mortality (SSB0) was calculated to be 11,400,000 kg. The corresponding limit reference point (LRP) and proposed upper stock reference (USR) are 1,140,000 kg and 1,690,000 kg, respectively. If the 13,783 acres of nursery area upstream of anthropogenic barriers were accessible, the total nursery area would be 72,459 acres. For this amount of nursery area, the SSB0 is 14,100,000 kg. The corresponding LRP and proposed USR are 1,410,000 kg and 2,090,000 kg, respectively. Biomass reference point recalculation may be considered following new information on habitat accessibility and/or changes to the amount of available habitat resulting from modifications to passage efficiency or barrier removal.
Description
1 online resource (12 pages) : maps, charts, photographs
Subject
- Terms of reference,
- Habitats,
- Fisheries management,
- Dams
Pagination
12 pages
Identifiers
- Government document number
- Fs70-6/2024-051E-PDF
- ISBN
- 9780660735306
- ISSN
- 1919-5087
Report
Relation
- Is translation of:
- https://open-science.canada.ca/handle/123456789/3141
Citation(s)
DFO. 2024. Habitat-Based Reference Points for Saint John River Alewife, Upstream of the Mactaquac Dam. DFO Can. Sci. Advis. Sec. Sci. Advis. Rep. 2024/051.