00000nam 2200000zi 4500 9.891941 CaOODSP 20221107173026 m o d f cr ||||||||||| 200930s1977 bccd ob f00| 0 eng d CaOODSP eng rda CaOODSP n-cn-bc Fs143-2/77-2E-PDF McDonald, Judy E., author. A comparison of loading densities for sockeye salmon in a gravel incubator / by Judy E. McDonald. [Vancouver] : Canada Department of Fisheries and the Environment, Pacific Region, [1977] 1 online resource (iv, 21 pages) : charts. text txt rdacontent computer c rdamedia online resource cr rdacarrier Technical report series ; PAC/T-77-2 Digitized edition from print [produced by Environment and Climate Change Canada]. Includes bibliographical references (page 15). "An upwelling gravel incubator was operated at Fulton River, B. C., to establish optimum egg densities for sockeye salmon production. Load levels were 5,000 to 11,000 eggs per layer, eggs were planted while soft, in gravel 2.5 to 3.2 cm in diameter with an approximate total inflow of 795 1/min. for 1.5 million eggs. Comparisons were made of egg-to-fry survival, emergence timing and fry quality between egg densities. Satisfactory survivals to the fry stage were obtained at all load levels, although fry emerging from egg densities of 11,000 eggs per layer were shorter. Furthermore, fry migrations were contracted in those sections planted at 9,000 and 11,000 eggs per layer. It was concluded that practical egg densities for sockeye production are considered below 11,000 eggs per layer under the above conditions"--Abstract. Fishes Eggs. Sockeye salmon. Fish culture British Columbia. Poissons Oeufs. Saumon rouge. Pisciculture Colombie-Britannique. Canada. Fisheries and Marine Service. Pacific Region, issuing body. Technical report series (Canada. Fisheries and Marine Service. Pacific Region) PAC/T-77-2. (CaOODSP)9.900554 PDF 771 KB https://publications.gc.ca/collections/collection_2020/eccc/Fs143-2-77-2-eng.pdf