00000cam 2200000zi 4500 9.962140 CaOODSP 20260609134922 m o d f cr mn||||||||| 260423e202605##oncab ob f000 0 eng d 9780660996806 CaOODSP eng rda CaOODSP n-cn-qu n-cn-nf ln----- x4y2 Fs70-5/2026-040E-PDF Chamberland, Jean-Martin, author. Preliminary results from the 2025 August ecosystemic survey in the Estuary and northern Gulf of St. Lawrence / Jean-Martin Chamberland, Mathieu Boudreau, Hugo Bourdages, Mathieu Desgagnés, Peter S. Galbraith, Laurie Isabel, Jordan Ouellette-Plante, and Caroline Senay. Ottawa ON : Canadian Science Advisory Secretariat (CSAS), May 2026. ©2026 1 online resource (iv, 116 pages) : illustrations (chiefly colour), maps (chiefly colour). text txt rdacontent computer c rdamedia online resource cr rdacarrier Research document, 1919-5044 ; 2026/040 Issued also in French under title: Résultats préliminaires du relevé écosystémique d'août 2025 dans l'estuaire et le nord du golfe du Saint-Laurent. Includes bibliographical references (pages 9-10). "Fisheries and Oceans Canada conducts an annual ecosystem survey in the St. Lawrence Estuary and northern Gulf. The survey has several objectives: to estimate the abundance and biomass of groundfish and invertebrates; to assess physical, chemical, and biological (phytoplankton and zooplankton) oceanographic conditions; to evaluate the biodiversity of species found near the seabed; to monitor the pelagic ecosystem over time; and to collect samples for various research projects. In 2025, the survey was conducted between August 5 to September 8 aboard the Canadian Coast Guard Ship (CCGS) John Cabot. During this survey, 159 trawl tows were successfully completed. In addition, 68 vertical water column profiles were carried out to characterize oceanographic conditions, and 52 zooplankton samples were also collected. This report presents the results of successful trawl tow catches of the 2025 survey. A total of 79 fish taxa and 194 invertebrate taxa were identified during this survey. Historical perspectives (catch rates, spatial distribution, length frequency) are presented for 31 taxa. These fishery-independent data will be used for several stock assessments, including Atlantic Cod (Gadus morhua), Redfish (Sebastes mentella and S. fasciatus), Greenland Halibut (Reinhardtius hippoglossoides), Atlantic Halibut (Hippoglossus hippoglossus), Witch Flounder (Glyptocephalus cynoglossus), Capelin (Mallotus villosus), and Northern Shrimp (Pandalus borealis). Water temperatures at 300 m have decreased further since the record high of 2022, falling from 7.1 °C in 2022 to 6.5 °C, but remain warm. Temperatures at 150 m and 200 m, however, have increased slightly since 2024. The minimum temperature of the cold intermediate layer has decreased slightly compared to 2024, dropping from the 4th to the 8th warmest since 1985. For the first time since 2019, surface water temperatures were on average close to normal during the July-August and May-August periods"--Abstract, page iv. Ecological surveys Saint Lawrence, Gulf of. Ecological surveys Québec (Province) Saint Lawrence River Estuary. Fish surveys Saint Lawrence, Gulf of. Fish surveys Québec (Province) Saint Lawrence River Estuary. Invertebrate surveys Saint Lawrence, Gulf of. Invertebrate surveys Québec (Province) Saint Lawrence River Estuary. Oceanography Saint Lawrence, Gulf of Observations. Oceanography Québec (Province) Saint Lawrence River Estuary Observations. Canadian Science Advisory Secretariat, issuing body. Canada. Department of Fisheries and Oceans. Quebec Region, issuing body. Résultats préliminaires du relevé écosystémique d'août 2025 dans l'estuaire et le nord du golfe du Saint-Laurent / (CaOODSP)9.962141 Research document (Canadian Science Advisory Secretariat) 1919-5044 ; 2026/040. (CaOODSP)9.507396 PDF 24.50 MB https://publications.gc.ca/collections/collection_2026/mpo-dfo/fs70-5/Fs70-5-2026-040-eng.pdf