00000cam 2200000zi 4500 9.964955 CaOODSP 20260807133403 m o d f cr mn||||||||| 260807e198010##bccab ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-bc x7x8 Fs97-4/1595E-PDF Fs97-4/1595 Lister, D. B., author. Chum salmon survival and production at seven improved groundwater-fed spawning areas / by D.B. Lister, D.E. Marshall and D.G. Hickey. Vancouver, B.C. : Enhancement Services Branch, Department of Fisheries and Oceans, October 1980. ©1980 1 online resource (x, 58 pages, 51 unnumbered pages) : illustrations, maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian manuscript report of fisheries and aquatic sciences, 0706-6473 ; 1595 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (pages 57-58). "Chum salmon spawning, egg-to-fry survival and fry production were assessed in a one-year study of improved groundwater-fed spawning areas in southern British Columbia. Survival from potential egg deposition to fry emigration ranged from 1% to 33.5% and averaged 16.3%, approximately twice the average recorded at natural spawning areas in the province. Although maximum fry production per unit of spawning area (517/m²) was achieved with the highest spawning density (2.5 females/m²), fry output per area did not increase appreciably when density exceeded 0.5 female/m². The advantages of a graded gravel spawning substrate, which had been added to 5 of the 7 sites, were not apparent from the survival data. However, differences between sites in other physical features and in spawner density may have obscured the influence of substrate quality. Additional information is presented on characteristics of chum salmon spawning populations and fry migrations, as well as incidental data on utilization of the improved spawning areas by other salmonid species"--Abstract, page x. Includes abstracts in English and French. Chum salmon Spawning British Columbia. Chum salmon Eggs Incubation British Columbia. Chum salmon Productivity British Columbia. Chum salmon Migration British Columbia. Fish habitat improvement British Columbia. Saumon keta Frai Colombie-Britannique. Saumon keta Œufs Incubation Colombie-Britannique. Saumon keta Productivité Colombie-Britannique. Saumon keta Migration Colombie-Britannique. Poissons Habitat Amélioration Colombie-Britannique. Canada. Department of Fisheries and Oceans, issuing body. Canada. Department of Fisheries and Oceans. Pacific Region. Enhancement Services Branch, issuing body. Canadian manuscript report of fisheries and aquatic sciences ; 1595. (CaOODSP)9.505211 PDF 1.81 MB https://publications.gc.ca/collections/collection_2026/mpo-dfo/fs97-4/Fs97-4-1595-eng.pdf