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Found 10 records similar to Relative occurrence of Northern Wolffish in the Estuary and Gulf of St. Lawrence

Federal

Spatial distribution of the relative occurrence of Spotted Wolffish in the annual DFO groundfish research surveys conducted by the Québec (1978-2008) and Gulf (1971-2008) regions. Catch and effort data were aggregated by 100 km² cells. The probability of catching an Spotted Wolffish in a set and within a cell (relative occurrence) was calculated as the ratio of the number of sets in which a species was recorded and the total number of sets made. This method allows the mapping of catch and effort for numerous time series based on data from different programs in both the whole study area (research surveys and Sentinel Fisheries using bottom trawls and a random stratified design) or in specific areas within the Gulf.

Last Updated: Sep. 20, 2019
Date Published: Jan. 1, 2011
Organization: Fisheries and Oceans Canada
Formats: SHP CSV ESRI REST
Keywords:  Habitat, Perch-like Fishes, Occurence, Distribution, Spotted wolffish, Anarhichas minor, St. Lawrence Estuary, Gulf of St. Lawrence, Cabot Strait
Federal

Spatial distribution of the relative occurrence of Atlantic Wolffish in the annual DFO groundfish research surveys conducted by the Québec (1978-2008) and Gulf (1971-2008) regions. Catch and effort data were aggregated by 100 km² cells. The probability of catching an Atlantic Wolffish in a set and within a cell (relative occurrence) was calculated as the ratio of the number of sets in which a species was recorded and the total number of sets made. This method allows the mapping of catch and effort for numerous time series based on data from different programs in both the whole study area (research surveys and Sentinel Fisheries using bottom trawls and a random stratified design) or in specific areas within the Gulf.

Last Updated: Sep. 20, 2019
Date Published: Jan. 1, 2011
Organization: Fisheries and Oceans Canada
Formats: SHP CSV ESRI REST
Keywords:  Habitat, Perch-like Fishes, Occurence, Distribution, Atlantic wolffish, Anarhichas lupus, St. Lawrence Estuary, Gulf of St. Lawrence, Cabot Strait
Federal

Spatial distribution of the Thorny Skate presence expressed by catch weight based on the annual Department of Fisheries and Oceans (DFO) groundfish research surveys realised between 2004 and 2010. Catch data (kg/nautical mile) were aggregated by 100 km² cells. They are derived from processed data used for the production of: Chouinard, P-M., J-D. Dutil, S. Proulx, D. Borcard and J. Crocker. 2014.

Last Updated: May 6, 2021
Date Published: Jan. 1, 2014
Organization: Fisheries and Oceans Canada
Formats: SHP CSV ESRI REST
Keywords:  Distribution, Weight, Thorny skate, Amblyraja radiata, Fish, St. Lawrence Estuary, Gulf of St. Lawrence, Cabot Strait, Belle Isle Strait
Federal

Spatial distribution of the Smooth Skate presence expressed by catch weight based on the annual Department of Fisheries and Oceans (DFO) groundfish research surveys realised between 2004 and 2010. Catch data (kg/nautical mile) were aggregated by 100 km² cells. They are derived from processed data used for the production of: Chouinard, P-M., J-D. Dutil, S. Proulx, D. Borcard and J. Crocker. 2014.

Last Updated: May 6, 2021
Date Published: Jan. 1, 2014
Organization: Fisheries and Oceans Canada
Formats: SHP CSV ESRI REST
Keywords:  Distribution, Weight, Smooth skate, Malacoraja senta, Fish, St. Lawrence Estuary, Gulf of St. Lawrence, Cabot Strait, Belle Isle Strait
Federal

The Recovery Strategy for Northern Wolffish (Anarhichas denticulatus), Spotted Wolffish (A. minor), and Management Plan for Atlantic Wolffish (A. lupus) in Canada (Kulka et al. 2007) (hereafter referred to as the Recovery Strategy) was posted on the Species at Risk Public Registry in 2008. The following document fulfills Fisheries and Oceans Canada’s (DFO) commitment to report every five years on the progress of Recovery Strategy implementation and covers the period February 2008 - February 2013.

Last Updated: Feb. 24, 2022
Date Published: Jan. 1, 2013
Organization: Fisheries and Oceans Canada
Formats: PDF HTML
Keywords:  Endangered species, Fish, Environmental management
Federal

Spatial distribution of the Winter Skate relative occurrence based on the annual Department of Fisheries and Oceans (DFO) groundfish research surveys realised between 2004 and 2010. The probability of catching a Winter Skate in a set and within a cell (relative occurrence) was calculated as the ratio of the number of sets in which a species was recorded and the total number of sets made. Catch and set data were aggregated using a grid made up of 100 km² cells. They are derived from processed data used for the production of: Chouinard, P-M., J-D. Dutil, S. Proulx, D. Borcard and J. Crocker.

Last Updated: May 6, 2021
Date Published: Jan. 1, 2014
Organization: Fisheries and Oceans Canada
Formats: SHP CSV ESRI REST
Keywords:  Distribution, Relative occurrence, Winter skate, Leucoraja ocellata, Fish, St. Lawrence Estuary, Gulf of St. Lawrence, Cabot Strait, Belle Isle Strait
Federal

Available information for the Estuary and Gulf of St. Lawrence on salinity, temperature, dissolved oxygen, depth, slope, and variability in landscape and sediments, were aggregated using a grid made up of 100 km2 cells as a basis for mapping and describing marine habitats for conservation and integrated management purposes. For example, 26 variables were selected to describe depth, slope, salinity and temperature. Based on that information, cluster analyses were conducted grouping cells into 13 different megahabitats. Four megahabitats described the deep waters, and areas outside channels formed 9 megahabitats: four in the southern Gulf and five in the northern Gulf.

Last Updated: May 6, 2021
Date Published: Jan. 1, 2011
Organization: Fisheries and Oceans Canada
Formats: SHP CSV ESRI REST
Keywords:  Coastal Habitat, Marine Habitat, Bathymetry/Seafloor Topography, Oxygen, Ocean Temperature, Water Temperature, Salinity, Sediment, St. Lawrence Estuary
Federal

A geospatial database involving 130 descriptors was created describing the pelagic and benthic habitats of the 0–30 m surface layer in the estuary and Gulf of St. Lawrence. A grid made of 6.25 km² cells (2.5 x 2.5 km) was used to aggregate the data. Each of the 39,337 cells overlapping the marine environment was characterized using landscape, hydrographic, and oceanographic parameters determined from observations (including satellite imagery), a 3D circulation model, and published and unpublished material available at local and regional scales. Purpose

The dataset provides useful information on the spatial extent of major coastal epipelagic habitats in the study area and can be used for mapping purposes and for analyses of species-habitat relationships.

Last Updated: May 6, 2021
Date Published: Jan. 1, 2012
Organization: Fisheries and Oceans Canada
Formats: SHP CSV ESRI REST
Keywords:  Coastal Habitat, Epipelagic Habitat, Seafloor Topography, Salinity, Turbidity, Current, Ice, St. Lawrence Estuary, Gulf of St. Lawrence
Federal

Spatial distribution of lumpfish catch rates (number per tow) during the August DFO research survey conducted annually since 1990, to assess the state of groundfish and shrimp stocks in the northern Gulf of St. Lawrence. The area sampled by a tow is the product of the distance trawled (fishing time multiplied by vessel speed) and the wing spread (13.41 m for the Alfred Needler and 16.94 m for the Teleost). Given that this area may vary among tows, the sampling unit is standardized and defined as being a station sampled by a tow over a distance of 0.75 nautical miles (1,389 m) with a horizontal wing spread of 16.94 m. Catch variables were calculated based on the standard area, 0.02353 km². After each tow, the catch was sorted by taxa, and the number of individuals and total biomass of these taxa were noted.

Last Updated: May 6, 2021
Date Published: Jan. 1, 2015
Organization: Fisheries and Oceans Canada
Formats: SHP CSV ESRI REST
Keywords:  Catch rates, Assessment, Lumpfish, Cyclopterus lumpus, Gulf of St. Lawrence, St. Lawrence Estuary, Cabot Strait, Strait of Belle Isle, Earth sciences
Federal

This layer represents the relative summer density of belugas in the St. Lawrence Estuary based on 35 aerial surveys carried out from 1990 to 2009. The boundaries of the areas were determined by combining the highest densities until the desired proportion of the population was obtained using kernel density estimation in order to obtain a smooth and continuous density distribution. Within Fisheries and Oceans Canada (DFO), the ecosystem approach is considered a tool for operational planning, project implementation and preparation of advisory reports. In response to this strategic direction, the DFO science division is committed to implement the ecosystem approach in its activities as Ecosystem Research Initiatives (ERI) in each of the six administrative regions of DFO.

Last Updated: May 31, 2022
Date Published: Jan. 1, 2022
Organization: Fisheries and Oceans Canada
Formats: SHP CSV ESRI REST
Keywords:  Quebec, Estuary of St. Lawrence, Beluga whale, Whale, Summer, relative density, Delphinapterus leucas, urn:lsid:marinespecies.org:taxname:137115, Marine mammals
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