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DFO Maritimes Region Research Vessel Trawl Surveys - Fish Observations
Citation
Clark, D., Branton, B. 2007. DFO Maritimes Region Research Vessel Trawl Surveys - Fish Observations. OBIS Canada Digital Collections. OBIS Canada, Bedford Institute of Oceanography, Dartmouth, Nova Scotia, Canada, Version 1, Digital, retrieved from http://iobis.org/.

Access data
Availability: Creative Commons License This dataset is licensed under a Creative Commons Attribution 4.0 International License.

Description
This is the OBIS-formatted view of the Canadian Department of Fisheries and Oceans (DFO) Maritimes Research Vessel Trawl Surveys. This OBIS product reports the abundance and weight of demersal fish species captured by a variety of trawl gear and vessles. more

This is the OBIS-formatted view of the Canadian Department of Fisheries and Oceans (DFO) Maritimes Research Vessel Trawl Surveys. This data is created using a Structured Query Language (SQL) program run against the DFO production database. Refer to the parent metadata record for more information about the surveys. This OBIS product reports the abundance and weight of demersal fish species captured by a variety of trawl gear and vessles. Catch data appear in the "ObservedIndividualCount" and "ObservedWeight" OBIS fields and have been normalised for distance towed. The swept area of each tow can be found in the "SampleSize" field of the OBIS schema. Care should be taken when using multiple types of gear since the catchability of different fish species varies from gear to gear. The OBIS field "Locality" contains the DFO stratum number where each tow was conducted. The OBIS field "CollectionCode" identifies which survey series each data record comes from. Strata statistics required to derive stratified random estimates of catch abundance and biomass can be found on the OBISCanada website or upon request. OBIS Schema fields implemented in this data set are: InstitutionCode, CatalogNumber, Citation, FieldNumber, Collector, YearCollected, MonthCollected, DayCollected, TimeOfDay, StartYearCollected, StartMonthCollected, StartDayCollected, StartTimeOfDay, EndYearCollected, EndMonthCollected, EndDayCollected, EndTimeOfDay, ContinentOcean, Locality, StartLatitude, StartLongitude, EndLatitude, EndLongitude, Latitude, Longitude, MinimumDepth, MaximumDepth, Temperature, SampleSize, ScientificName, Kingdom, Phylum, Class, Order, Family, Genus, Species, ObservedWeight, ObservedIndividualCount.

Scope
Themes:
Biology > Fish
Keywords:
Marine, AN, North Atlantic, ANW, Canada, Pisces

Geographical coverage
AN, North Atlantic [Marine Regions]
ANW, Canada [Marine Regions]

Taxonomic coverage
Pisces [WoRMS]

Contributors
Government of Canada; Department of Fisheries and Oceans (DFO), moredata owner
Government of Canada; Department of Fisheries and Oceans; Bedford Institute of Oceanography (BIO), moredata provider

Related datasets
Published in:
OBIS-Canada: Canadian Ocean Biogeographic Information System, more


Dataset status: Completed
Data type: Data
Data origin: Monitoring: field survey
Metadatarecord created: 2013-03-08
Information last updated: 2013-03-19
All data in IMIS is subject to the VLIZ privacy policy