Snow Crab Collaborative Post-season Trap Survey

Snow Crab Collaborative Post-season Trap Survey This project was completed by the Shellfish Section in the Newfoundland and Labrador Science Branch of Fisheries and Oceans Canada (DFO), in collaboration with industry partners. The Coastal Environmental Baseline program supported the Placentia Bay portion of project work for an ongoing industry-DFO collaborative post-season trap survey for Snow Crab that was initiated in 2003 and has occurred each year. This survey is conducted by Snow Crab harvesters accompanied by at-sea observers and takes place in NAFO Divisions 2J3KLNOP4R. Historically the survey focused on commercial fishing grounds but began transitioning to a partly random stratified design in 2017. Since 2018, approximately 50% of survey stations are randomly allocated while 50% remain fixed. At each station, six (for inshore stations) or ten (for offshore stations) commercial traps are set in a fleet. To gather data on non-commercial sized Snow Crab, including females, many fleets also include one small-mesh trap. The coverage of small-mesh traps has been expanding in recent years with the aim of one small-mesh trap for every station in the coming years. Biological sampling is undertaken on at least one commercial trap and the small-mesh trap at each station. The data from this survey is incorporated into the annual stock assessment for Snow Crab in the Newfoundland and Labrador region. This record contains trap locations for Placentia Bay, and information on the types of data collected. More detailed information can be found in Pantin et al. (2022). https://publications.gc.ca/collections/collection_2023/mpo-dfo/fs70-5/Fs70-5-2022-076-eng.pdf 2025-02-17 Fisheries and Oceans Canada Julia.Pantin@dfo-mpo.gc.ca Form DescriptorsNature and EnvironmentScience and TechnologyCoastal Environmental Baseline ProgramSpecies DistributionAnimal populationsCoastal watersCrustaceansMarine biology Data Dictionary_Site locations.csvCSV https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/cb7c1add-3895-4e14-bdc1-b588cb126588/attachments/Data%20Dictionary_Site%20locations.csv Dictionnaire de données - emplacements des sites.csvCSV https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/cb7c1add-3895-4e14-bdc1-b588cb126588/attachments/Dictionnaire%20de%20donn%C3%A9es%20-%20emplacements%20des%20sites.csv SHP_EN.7zSHP https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/cb7c1add-3895-4e14-bdc1-b588cb126588/attachments/SHP_EN.7z SHP_FR.7zSHP https://api-proxy.edh-cde.dfo-mpo.gc.ca/catalogue/records/cb7c1add-3895-4e14-bdc1-b588cb126588/attachments/SHP_FR.7z Web Map ServiceESRI REST https://egisp.dfo-mpo.gc.ca/arcgis/rest/services/open_data_donnees_ouvertes/snow_crab_colab_post_season_trap_survey_placentia_bay/MapServer Web Map ServiceESRI REST https://egisp.dfo-mpo.gc.ca/arcgis/rest/services/open_data_donnees_ouvertes/snow_crab_colab_post_season_trap_survey_placentia_bay/MapServer

This project was completed by the Shellfish Section in the Newfoundland and Labrador Science Branch of Fisheries and Oceans Canada (DFO), in collaboration with industry partners. The Coastal Environmental Baseline program supported the Placentia Bay portion of project work for an ongoing industry-DFO collaborative post-season trap survey for Snow Crab that was initiated in 2003 and has occurred each year. This survey is conducted by Snow Crab harvesters accompanied by at-sea observers and takes place in NAFO Divisions 2J3KLNOP4R. Historically the survey focused on commercial fishing grounds but began transitioning to a partly random stratified design in 2017. Since 2018, approximately 50% of survey stations are randomly allocated while 50% remain fixed. At each station, six (for inshore stations) or ten (for offshore stations) commercial traps are set in a fleet. To gather data on non-commercial sized Snow Crab, including females, many fleets also include one small-mesh trap. The coverage of small-mesh traps has been expanding in recent years with the aim of one small-mesh trap for every station in the coming years. Biological sampling is undertaken on at least one commercial trap and the small-mesh trap at each station.

The data from this survey is incorporated into the annual stock assessment for Snow Crab in the Newfoundland and Labrador region. This record contains trap locations for Placentia Bay, and information on the types of data collected.

More detailed information can be found in Pantin et al. (2022).

https://publications.gc.ca/collections/collection_2023/mpo-dfo/fs70-5/Fs70-5-2022-076-eng.pdf