DFO Maritimes Research Vessel Trawl Surveys Fish Observations (OBIS Canada)Entry ID: OBIS.DFOgfsDBfish
Abstract: 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.
Purpose: OBIS-formatted data from Canadian Department of Fisheries and Oceans (DFO) Maritimes Research Vessel Trawl Surveys.
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
For OBIS Schema concept details see http://www.iobis.org/tech/provider/
Additional fields that can be provided upon request:
gear, geardescription, MINIMUMSIZE, MAXIMUMSIZE, AVERAGESIZE, AVERAGESIZE5CM
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Data Set Citation
Dataset Originator/Creator: Clark, D. and Branton, B.
Dataset Title: DFO Maritimes Research Vessel Trawl Surveys
Dataset Series Name: OBIS Canada Digital Collections
Dataset Release Date: 2007
Dataset Release Place: Bedford Institute of Oceanography, Dartmouth, Nova Scotia, Canada
Dataset Publisher: OBIS Canada
Data Presentation Form: DigitalOnline Resource: http://www.iobis.org/
Start Date: 1970-07-06Stop Date: 2007-03-20
AGRICULTURE > AGRICULTURAL AQUATIC SCIENCES > FISHERIES
OCEANS > OCEAN TEMPERATURE > WATER TEMPERATURE
OCEANS > OCEAN TEMPERATURE
OCEANS > AQUATIC SCIENCES > FISHERIES
OCEANS > AQUATIC SCIENCES
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > FISH > RAY-FINNED FISHES
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > FISH > SHARKS/RAYS/CHIMAERAS
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > FISH
BIOLOGICAL CLASSIFICATION > ANIMALS/VERTEBRATES > FISH > LAMPREYS/HAGFISHES
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > MOLLUSKS > CEPHALOPODS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > MOLLUSKS > CEPHALOPODS > SQUIDS
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > TUNICATES
BIOLOGICAL CLASSIFICATION > ANIMALS/INVERTEBRATES > TUNICATES > SEA SQUIRTS
ISO Topic Category
Quality Values provided in spatial coverage are approximate only.
Access Constraints This dataset is publicly available from the URL given below.
Use Constraints This data set conforms to the PICCCBY Attribution License
Please follow instructions listed in the citation reference provided at http://data.aad.gov.au/aadc/metadata/citation.cfm?entry_id=Acoustic... when using these data.
Please also contact the investigator when using these data.
Data Set Progress
Role: TECHNICAL CONTACT
Role: DIF AUTHOR
Email: tracey.rogers at unsw.edu.au
University of New South Wales
Province or State: New South Wales
Postal Code: 2052
Creation and Review Dates
DIF Creation Date: 1999-10-07
Last DIF Revision Date: 2010-12-21