00000nam 2200000zi 4500 9.949253 CaOODSP 20250319092519 m o d f cr mn||||||||| 250319e198501##nkca ob f000 0 eng d CaOODSP eng rda CaOODSP eng eng fre n-cn-nk ln----- Fs97-6/1344E-PDF Fs97-6/1344E Charmantier, G., author. Lethal and sublethal effects of potash brine on different stages of the lobster, Homarus americanus / G. Charmantier, M. Charmantier-Daures and W. Young-Lai. St. Andrews, New Brunswick : Fisheries and Environmental Sciences, Fisheries Research Branch, Department of Fisheries and Oceans, Biological Station, January 1985. ©1985 1 online resource (iii, 13 pages) : illustrations. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian technical report of fisheries and aquatic sciences, 0706-6457 ; 1344 Digitized edition from print [produced by Department of Fisheries and Oceans]. Includes bibliographical references (page 4). "Denison Mine, Sussex, New Brunswick, proposes to discharge a brine, prepared by diluting potash ore in well water, into the Bay of Fundy. To set criteria for the dilution of this brine in seawater (SW), we studied the biological repercussions of different ore concentrations on various developmental stages of the American lobster, Homarus americanus. Acute toxicity bioassays enabled us to calculate the 96 h LC50₈, which at 20°C ranged from 1 to 2 g ore/L SW in larval stages I, II, and III, and 2.25 to 3 g/L in stage IV and juveniles. At 11°C, LC50₈ are roughly similar, except in stage IV, 1.5 to 2.25 g/L. Sublethal bioassays showed that the development from hatch to stage IV was only possible if the concentration was under 1.5 g ore/L SW. Comparative experiments using "Instant Ocean" salts showed that the cause of death is not related to an increase in osmolality of the medium. Other experiments using additions of NAC1 or KC1 showed that the principal toxic agent in the brine was the K⁺. K⁺ titrations in the blood of lobsters which were exposed to different concentrations of ore for different durations indicate that cause of death could be the toxic effect of increased blood K⁺ concentrations"--Abstract, page iii. Includes abstracts in English and French. American lobster Effect of water pollution on. Sewage Toxicity testing. Potash mines and mining Waste disposal Environmental aspects Fundy, Bay of. Homard d'Amérique Effets de la pollution de l'eau sur. Eaux usées Toxicité. Potasse Mines et extraction Déchets Élimination Aspect de l'environnement Fundy, Baie de. Canada. Department of Fisheries and Oceans, issuing body. Canada. Department of Fisheries and Oceans. Biological Station (St. Andrews, N.B.), issuing body. Canadian technical report of fisheries and aquatic sciences ; 1344. (CaOODSP)9.504449 PDF 672 KB https://publications.gc.ca/collections/collection_2025/mpo-dfo/fs97-6/Fs97-6-1344-eng.pdf