00000nam 2200000za 4500 9.834332 CaOODSP 20221107150418 cr ||||||||||| 170328s2017 oncbd ob f000 0 eng d CaOODSP eng eng fre n-cn--- n-cn-ab n-cn-bc n-cn-nf n-cn-on n-cnm-- Fs70-5/2017-018E-PDF Determining regional benchmarks of fish productivity using existing electrofishing data from rivers [electronic resource] : proof of concept / R.G. Randall ... [et al.]. Ottawa : Fisheries and Oceans Canada, Canadian Science Advisory Secretariat, 2017. v, 50 p. : charts, maps (some col.) Canadian Science Advisory Secretariat (CSAS), research document, 1919-5044 ; 2017/018, Central and Arctic Region Cover title. “March 2017.” Title at head of French abstract: Déterminer les points de référence régionaux pour la productivité du poisson au moyen de données existantes sur la pêche à l'électricité dans les rivières : validation de principe. Includes bibliographical references (p. 45-48). “Electrofishing data from streams and rivers in Newfoundland, the Maritime Provinces, Ontario, Alberta and British Columbia showed regional differences in fish productivity. The existing electrofishing data were originally collected by different agencies for various reasons, including the determination of stock status of harvested species, the investigation of fish habitat associations, and the investigation of the status and life history characteristics of Endangered fish species. Despite being targeted for specific species, electrofishing catches of all cohabiting species at the sites were recorded, providing estimates of total density (fish m-2) and biomass (g m-2) of the fish community. The datasets varied in duration and spatial extent from ‘snapshots’ (< 5 years and a small number of sites) to time series (> 10 years and spatially extensive). For each site, a Habitat Productivity Index (HPI) was also estimated as an index of production. Estimates of region-dependent fish productivity were proof of concept and demonstrated the feasibility of using existing electrofishing data to determine spatial differences in productivity in the rivers and streams of Canada. Also, differences in productivity are likely predictable from readily-available landscape drivers such as air temperature and location. Existing fishing areas or zones are a possible spatial unit for aggregating the data. Limitations of using existing electrofishing data included uncertainty of fish capture probability and unknown status of resident and migratory species in terms of carrying capacity"--Abstract, p. iv. Includes abstract in French. gccst Fisheries resources gccst Fish gccst Biomass gccst Watercourses gccst Fisheries management Randall, Robert George. Canada. Department of Fisheries and Oceans. Canada. Ecosystems and Oceans Science. Canadian Science Advisory Secretariat. Research document (Canadian Science Advisory Secretariat) 1919-5044 ; 2017/018, Central and Arctic Region (CaOODSP)9.507396 PDF 1.62 MB https://publications.gc.ca/collections/collection_2017/mpo-dfo/Fs70-5-2017-018-eng.pdf