00000nam 2200000zi 4500 9.954918 CaOODSP 20250915150202 m o d f cr mn||||||||| 250908t20252025qucab ob f000 0 eng d 9780660788302 CaOODSP eng rda CaOODSP eng eng fre n-cn-qu n-cnm-- n-cn-nf ln----- x9y2 Fs97-18/405E-PDF Blais, M., author. Chemical and biological oceanographic conditions in the Gulf of St. Lawrence during 2024 / Marjolaine Blais, Stephanie A. Clay, Peter S. Galbraith, and Michel Starr. Mont-Joli, QC : Regional Sciences Branch, Québec Region, Pelagic and Ecosystemic Sciences Division, Fisheries and Oceans Canada, Maurice Lamontagne Institute, 2025. ©2025 1 online resource (vi, 87 pages) : illustrations (chiefly colour), colour maps. text txt rdacontent computer c rdamedia online resource cr rdacarrier Canadian technical report of hydrography and ocean sciences, 1488-5417 ; 405 Includes bibliographical references (pages 21-24). "This report presents an overview of chemical and biological oceanographic conditions in the Estuary and Gulf of St. Lawrence in 2024 relative to long-term means, based on data from the Atlantic Zone Monitoring Program (AZMP) and regional programs. Oxygen saturation reached record lows at 200 m in the Estuary and northwest Gulf, and at 250 m in the latter. Nutrient inventories were generally below normal in surface waters and above normal in deep layers. Vertically integrated chlorophyll a inventories were near or slightly below normal, except in the Estuary and northwest Gulf, where they were above normal. Remote sensing observations showed slightly below-normal surface chlorophyll a on the Magdalen Shallows, and near or above normal elsewhere. Spring blooms were early or near normal, while fall blooms were delayed. Zooplankton biomass was generally low in the Gulf, despite above-normal abundances of Calanus finmarchicus, mainly due to very low Calanus hyperboreus levels at several sites. Small calanoids, non-copepods, and warm-water copepods abundances were mostly below or near normal. Calanus finmarchicus showed an early phenology"--Abstract, page v. Includes abstracts in English and French. Chemical oceanography Québec (Province) Saint Lawrence River Estuary Observations. Chemical oceanography Saint Lawrence, Gulf of Observations. Marine biology Québec (Province) Saint Lawrence River Estuary Observations. Marine biology Saint Lawrence, Gulf of Observations. Océanographie chimique Québec (Province) Saint-Laurent, Estuaire du Observations. Océanographie chimique Saint-Laurent, Golfe du Observations. Biologie marine Québec (Province) Saint-Laurent, Estuaire du Observations. Biologie marine Saint-Laurent, Golfe du Observations. Canada. Department of Fisheries and Oceans, issuing body. Maurice Lamontagne Institute, issuing body. Canadian technical report of hydrography and ocean sciences ; 405. (CaOODSP)9.504781 PDF 17.80 MB https://publications.gc.ca/collections/collection_2025/mpo-dfo/Fs97-18-405-eng.pdf