Spawning Stock Biomass Estimates of Atlantic Cod in the Southern Gulf of St. Lawrence NAFO 4T-4Vn (Nov.-Apr.)
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PURPOSE: These data have been updated following a Canadian Science Advice Secretariat (CSAS) Regional Science Advisory Process. Associated publications are available in the citation section below or will be posted on the Fisheries and Oceans Canada (DFO) Science Advisory Schedule as they become available. Determine the stock status of southern Gulf of St. Lawrence Atlantic Cod. DESCRIPTION: The yearly spawning stock biomass estimates of southern Gulf of St. Lawrence Atlantic Cod were obtained using a Statistical Catch-at-Age model as part of the stock assessment to year 2023. The yearly estimates presented come from Markov Chain Monte Carlo (MCMC) simulations. The yearly median estimates are provided, along with uncertainty estimates (2.5th, 25th, 75th and 97.5th percentiles). The values are in thousands of tons of spawning stock biomass. USE LIMITATION: To ensure scientific integrity and appropriate use of the data, we would encourage you to contact the data custodian.
Mean fork length of Atlantic salmon (Salmo salar) from 1971-2021
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Mean fork length for returning adult Atlantic salmon (Salmo salar) that spent one or two years (1SW and 2SW, respectively) in the marine environment for 16 rivers throughout Eastern Canada spanning an 10° latitudinal gradient. These data were collected as part of monitoring programs for Atlantic salmon returns run by Fisheries and Oceans Canada (DFO). Data from at least eight populations, spanning all provinces in Atlantic Canada, over a 50-year period (1970-2021) will be included in this meta-analysis. These data, as well as mean fork length for returning adult Atlantic salmon from three rivers in Québec (1979-2021) collected as part of monitoring programs for Atlantic salmon returns run by the Ministère de l’Environnement, de la Lutte contre les changements climatiques, de la Faune et des Parcs, Government of Québec, are also available at: http://doi.org/10.17605/OSF.IO/78PWT.
AFSC/ABL: Global Ocean Ecosystems Dynamics (GLOBEC) fish and oceanography data
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Understanding the processes that regulate early marine survival of salmon is a major goal of the Global Ocean Ecosystems Dynamics (GLOBEC) Northeast Pacific (NEP) program. Faster growth and larger body size are generally associated with higher marine survival for most species of juvenile salmon, which experience relatively high mortality rates during early marine life. The interaction between the temporal-spatial distribution of juvenile salmon, growth performance, environmental conditions, and stage-specific survival are critical to understanding how physical and biological factors contribute to production and survival, and influence the mechanisms, magnitude, location, and timing of marine mortality. The northern Coastal Gulf of Alaska (CGOA) is a highly productive, down-welling based system where freshwater runoff and winds dominate the physical processes on the shelf. The physical environment changes at different spatial and temporal scales, which is believed to influence inter-annual variability in distribution, feeding, growth, and survival of juvenile salmon. Pink salmon are the upper trophic level target species of GLOBEC, however, the overarching programmatic goal is to enhance our understanding of the processes driving the physical structure and biological productivity of the highly dynamic CGOA system.