00000nam 2200000za 4500 9.806104 CaOODSP 20221107135820 cr ||||||||||| 150406s2000 oncdb ob f000 0 eng d CaOODSP eng eng fre n-cn--- Fs70-1/2000-119E-PDF Rose, George A., 1948- Acoustic surveys of Smith Sound, Trinity Bay, 1995-2000 [electronic resource] / G.A. Rose. Ottawa : Fisheries and Oceans Canada, 2000. 22 p. : fig., graphs, maps, tables. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 2000/119 Includes bibliographic references (p. 9). A dense spawning aggregation of cod was first observed in Smith Sound, Trinity Bay in the spring of 1995. Since that time several acoustic surveys have been attempted. The original survey results have been reworked here to conform with revised analytical protocols comparable to those used in present surveys. The first 1995 survey indicated the presence of approximately 9.5 million adult cod, primarily of year-classes 1990, 1989, and 1988. A survey in the spring of 1998 indicated the presence of approximately 7 million adult cod primarily of the 1990 and 1992 year-classes. A survey in January 1999 indicated the presence of approximately 11.5 million fish with high proportions of the 1995, 1994, and 1992 year-classes. Relatively strong recruitment from the 1995 spawning suggests a difference between the recruitment patterns in offshore and Smith Sound. Surveys in June 1999 indicated the presence of less than 1 million adult cod, and it is thought that these surveys occurred toward the end of spawning in 1999, and that most cod had already left the Sound. Surveys in January 2000 found a large abundance of cod of ages 2-15. These fish were segregated by size and maturity within the Sound and comprised a total mean biomass of ca. 22,000 t. The 1990 and 1992 year classes were present in relatively large numbers and the year-classes of 95, 96, and 97 were also relatively well represented. gccst Fisheries resources gccst Salt water fish gccst Fishing area gccst Fisheries management Canada. Department of Fisheries and Oceans. Canada. Canadian Stock Assessment Secretariat. Canadian Stock Assessment Secretariat research document, 1480-4883 ; 2000/119 (CaOODSP)9.507740 PDF 3.94 MB https://publications.gc.ca/collections/collection_2015/mpo-dfo/Fs70-1-2000-119-eng.pdf