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DFO Newfoundland and Labrador Region Ecosystem Trawl Surveys
Citation
Brodie, Bill, Mowbray, Fran and Power, Debbie, 2013. DFO Newfoundland and Labrador Region Ecosystem Trawl Surveys. Version 1 In OBIS Canada Digital Collections. Bedford Institute of Oceanography, Dartmouth, NS, Canada. Published by OBIS, Digital http://www.iobis.org/. Accessed on –INSERT DATE
Contact: Power, Debbie

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

Description
An OBIS version of the Fisheries and Oceans Canada Newfoundland and Labrador region (DFO-NL) ecosystem trawl survey data from 1977-2011. Survey data are collected by DFO stock assessment staff during stratified random seasonal (spring and fall) bottom trawl surveys. These surveys were initially designed to estimate abundance and distribution of commercial groundfish species, but since 1995 have also been regularly recording non-commercial species and invertebrates. The area surveyed has varied over time, as has the trawl gear used and the fishing methodology (tow duration) employed. Note in some years the ‘fall’ survey (usually Oct-Dec), continued January of the following calendar year. more

This dataset is the OBIS version of the 'bottom trawl' dataset and only species presence information is included at this time for standard sets. Taxonomic limitations Due to the emphasis on commercial fish species, taxonomic classifications of non-commercial fish and invertebrates prior to 1995 were frequently limited to genus or family and sometimes order. With the introduction of the Campelen trawl came a major change in the taxonomic detail recorded and by 2008 efforts were made to identify all fish to species, when possible. However although improved, identifications of some invertebrate taxa continue to be recorded at higher taxonomic levels. Consequently the absence of records for a particular species cannot be equated with an absence of the species, particularly when higher taxonomic classifications are present.

Scope
Themes:
Biology
Keywords:
Marine, ANW, Canada, Labrador, Animalia

Geographical coverage
ANW, Canada, Labrador [Marine Regions]

Temporal coverage
1971 - 2011

Taxonomic coverage
Animalia [WoRMS]

Parameter
Occurrence of biota

Contributors
Government of Canada; Department of Fisheries and Oceans (DFO), moredata creator

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

Publication
Based on this dataset:
Warren, W. et al. (1997). Analysis of the 1996 comparative fishing trial between the Alfred Needler with the Engel 145 trawl and the Wilfred Templeman with the Campelen 1800 trawl. Scientific Council Reports. Northwest Atlantic Fisheries Organization, 97/68. Northwest Atlantic Fisheries Organization: [s.l.]. 12 pp., more
Healey, B.P.; Brodie, W.B. (2009). Brief notes on the execution of Canadian multi-species surveys in 2007 and 2008. Scientific Council Reports. Northwest Atlantic Fisheries Organization, 09/12. Northwest Atlantic Fisheries Organization: Canada. 26 pp., more
Doubleday, W.G. (Ed.) (1981). Manual on Groundfish surveys in the Northwest Atlantic. Scientific council studies. Northwest Atlantic Fisheries Organization, 2. Northwest Atlantic Fisheries Organization: [s.l.]. 7-55 pp., more
Healey, B.P. et al. (2012). Performance and description of Canadian multi-species surveys in NAFO Subarea 2 + Divisions 3KLMNO, with emphasis on 2009-2011. Scientific Council Reports. Northwest Atlantic Fisheries Organization, 12-019. Northwest Atlantic Fisheries Organization: Canada. 26 pp., more
Warren, W.G. (1997). Report on the comparative fishing trial between the Gadus Atlantica and Teleost. Sci. Counc. Stud. NAFO 29: 81-92, more
Morgan, M.J. et al. (1998). Results of data conversions for American plaice in Div. 3LNO from comparative fishing trials between the Engel Otter Trawl and the Campelen 1800 Shrimp Trawl. Scientific Council Reports. Northwest Atlantic Fisheries Organization, 98/70. Northwest Atlantic Fisheries Organization: Newfoundland. 3 + tables + figures pp., more
Brodie, W. (2005). Scientific council meeting – June 2005. A description of the autumn multispecies surveys in SA2+ Divisions 3KLMNO from 1995-2004. Scientific Council Reports. Northwest Atlantic Fisheries Organization, 05/8. Northwest Atlantic Fisheries Organization: [s.l.]. 4 + tables + figures pp., more
Brodie, W.; Stansbury, D. (2007). Scientific council meeting – June 2007. A brief description of Canadian multispecies surveys in SA2+ Divisions 3KLMNO from 1995-2006. Scientific Council Reports. Northwest Atlantic Fisheries Organization, 07/18. Northwest Atlantic Fisheries Organization: [s.l.]. 5 + tables + figures pp., more
Lilly, G.R. (1982). The marine invertebrates code of the Nortwest Atlantic Fisheries Centre. Canadian Data Report of Fisheries and Aquatic Sciences = Rapport Statistique Canadien des Sciences Halieutiques et Aquatiques, 365. Minister of Supply and Services Canada: Canada. iv, 44 pp., more
Akenhead, S.A.; LeGrow, E.M. (1981). The vertebrates code of the Northwest Atlantic Fisheries Centre. Canadian Data Report of Fisheries and Aquatic Sciences = Rapport Statistique Canadien des Sciences Halieutiques et Aquatiques, 309. Minister of Supply and Services Canada: Canada. iv, 3 + appendices pp., more

Dataset status: Completed
Data type: Data
Data origin: Monitoring: field survey
Metadatarecord created: 2015-03-09
Information last updated: 2015-10-19
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