DFO Pacific Inside South Hard Bottom Longline Surveys
Citation
Cornthwaite M (2023). DFO Pacific Inside South Hard Bottom Longline Surveys. Version 3.0. Fisheries and Oceans Canada. Sampling event dataset https://doi.org/10.25607/c2kwq5 accessed via GBIF.org on 2024-09-01.Description
The Inside South Hard Bottom Longline (HBLL) survey is one of a set of long-term and coordinated surveys that together cover most of the nearshore, hard-bottom habitat of coastal British Columbia. The other surveys are the Inside North HBLL survey, Outside South HBLL survey, and Outside North HBLL survey.
The Inside South HBLL survey was first conducted in 2005. Starting in 2009, this survey has been repeated every second year in alternate years to the Inside North HBLL survey, with the exception that no surveys were conducted in 2017 and the 2020 survey was postponed to 2021 due to the COVID-19 pandemic. The objective of these surveys is to provide fishery-independent abundance indices and associated biological data for the assessment of nearshore rockfishes and other groundfish species that live on untrawlable, hard bottom habitats. The surveys follow a random depth-stratified design and the sampling units are 2 km by 2 km blocks. The surveys use size 13/0 circle hooks, baited with frozen squid.
The Inside South HBLL Survey is conducted by Fisheries and Oceans Canada (DFO) and takes place on the Canadian Coast Guard Research Vessel Neocaligus. This survey covers the southern portion of the inlets and protected waters east of Vancouver Island, including Desolation Sound, the Strait of Georgia and southern Gulf Islands in Pacific Fishery Management areas (PFMAs) 14 – 20, 28, and 29.
The data provided include information about the annual survey trips and fishing events (tows/sets) that are part of this survey series, including the vessel name, dates, times, spatial coverage, gear details, and effort information. Catch information (total weight in kg or counts of individual specimens) is included from successful fishing events. Catches are identified to species or to the lowest taxonomic level possible. Most catches are weighed, but some are too small (“trace” amounts) or too large (e.g. very large Big Skate). Some catches were subsampled and biological data were collected from individual fish specimens, including length, sex, and weight information. Where age structures were collected and processed, fish ages have been included.
Sampling Description
Study Extent
The Inside South HBLL survey was first conducted in 2005. Starting in 2009, this survey has been repeated every second year in alternate years to the Inside North HBLL survey, with the exception that no surveys were conducted in 2017. This survey covers the southern portion of the inlets and protected waters east of Vancouver Island, including Desolation Sound, the Strait of Georgia and southern Gulf Islands in Pacific Fishery Management areas (PFMAs) 14 – 20, 28, and 29.Sampling
The surveys follow a random depth-stratified design and the sampling units are 2 km by 2 km blocks. The surveys use size 13/0 circle hooks, baited with frozen squid.Quality Control
Scientific names associated with resource occurrence records have been mapped to recognized standards - marine taxa have been mapped to the World Register of Marine Species (WoRMS). The WoRMS codes, the AphiaIDs have been included as LSIDs in the occurrence record DwC field scientificNameID.Method steps
- This resource was created for OBIS Canada. Records were extracted from the Groundfish Biological Samples Database, GFBio (Groundfish Data Unit, Science Branch, Pacific Region, Fisheries and Oceans Canada) in DwC-A format and uploaded to the IPT using a combination of SQL and R. Scientific name matching with WoRMS was done using the R packages OBISTools and worrms and the R package RODBC was used to execute SQL procedures to extract the data.
Taxonomic Coverages
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Animaliarank: kingdom
Geographic Coverages
Bibliographic Citations
- Anderson, S.C., Keppel, E.A., Edwards, A.M. 2019. A reproducible data synopsis for over 100 species of British Columbia groundfsh. DFO Can. Sci. Advis. Sec. Res. Doc. 2019/041. vii + 321 p. - http://www.dfo-mpo.gc.ca/csas-sccs/Publications/ResDocs-DocRech/2019/2019_041-eng.html
- Page, L.M., Espinoza-Perez, H., Findley, L.T., Gilbert, C.R., Lea, R.N., Mandrak, N.E., Mayden, R.L., and Nelson, J.S.. 2013. Common and scientific names of fishes from the United States, Canada, and Mexico, 7th edition. American Fisheries Society, Special Publication 34, Bethesda, Maryland. 384 p. -
- Lochead, J.K., and Yamanaka, K.L. 2007. Summary report for the inshore rockfish (Sebastes spp.) longline survey conducted in Statistical Areas 14 to 20, 28 and 29, from August 11 to September 6, 2005. Can. Tech. Rep. Fish. Aquat. Sci. 2690: viii + 53 p. - http://waves-vagues.dfo-mpo.gc.ca/Library/327480.pdf
Contacts
Maria Cornthwaiteoriginator
position: Head, Groundfish Data Unit
Fisheries and Oceans Canada
3190 Hammond Bay Road
Nanaimo
V9T6N7
British Columbia
CA
email: maria.cornthwaite@dfo-mpo.gc.ca
userId: http://scholar.google.com/citations?user=ajmbOKgAAAAJ&hl=en
Maria Cornthwaite
metadata author
position: Head, Groundfish Data Unit
Fisheries and Oceans Canada
3190 Hammond Bay Road
Nanaimo
V9T6N7
British Columbia
CA
email: maria.cornthwaite@dfo-mpo.gc.ca
userId: http://scholar.google.com/citations?user=ajmbOKgAAAAJ&hl=en
Maria Cornthwaite
administrative point of contact
position: Head, Groundfish Data Unit
Fisheries and Oceans Canada
3190 Hammond Bay Road
Nanaimo
V9T6N7
British Columbia
CA
email: maria.cornthwaite@dfo-mpo.gc.ca
userId: http://scholar.google.com/citations?user=ajmbOKgAAAAJ&hl=en
Lorri Granum
administrative point of contact
position: Data Technician, Groundfish Data Unit
Fisheries and Oceans Canada
3190 Hammond Bay Road
Nanaimo
V9T 6N7
British Columbia
CA
email: lorri.granum@dfo-mpo.gc.ca