00000nam 2200000zi 4500 9.949764 CaOODSP 20250403110836 m o d f cr bn||||||||| 250403e196207##nkcao ob f000 0 eng d CaOODSP eng rda CaOODSP n-cn-ns Fs52-2/724E-PDF MacPhail, J. S., author. Fishing efficiency trials with a hydraulic clam (Mya) rake - 1961 / authorship, J. S. MacPhail and J. C. Medcof. St. Andrews, N. B. : Fisheries Research Board of Canada, Biological Station, July 1962. 1 online resource (16 pages, 14 unnumbered pages) : illustrations, photographs. text txt rdacontent computer c rdamedia online resource cr rdacarrier Manuscript report series (biological) ; no. 724 Cover title. Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (page 16). "Laboratory experiments indicate that hydraulic raking does not "wash out" clams. It merely liquifies the upper strata of the soil by turning it into a soil-water suspension with a high specific gravity. In this medium, clams with their low specific gravity float to the surface where they can be collected. Field trials show that in sandy soils our 1961 model of the hydraulic rake, equipped with wheels and 2-inch nozzles, is a manoeuverable and efficient tool for harvesting soft-shell clams"--Summary, page 15. Fishing boats Nova Scotia Hydraulic equipment Experiments. Clamming Nova Scotia Experiments. Bateaux de pêche Nouvelle-Écosse Équipement hydraulique Expériences. Myes Pêche sportive Nouvelle-Écosse Expériences. Fisheries Research Board of Canada. Biological Station (St. Andrews, N.B.), issuing body. Manuscript report series (biological) no. 724. (CaOODSP)9.812823 PDF 2.16 MB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs52-2/Fs52-2-724-eng.pdf