Canadian DFO Central and Arctic Stock Assessments


The National Oceanic and Atmospheric Administration Coral Reef Ecosystem Division (CRED) developed a rapid ecological assessment to determe the algal diversity and abundance in the Pacific. Data are available at OBIS. The OBIS compiled data includes species name, individual count, lat/lon, and some environmental correlates like depth and salinity. 

Dataset Location: OBIS DFO Stock Assessments

Direct Download: OBIS DFO Stock Assessments

Site Location: Northeastern Canadian Coast; Hudson Strait

Site(s) Georeferenced: Yes

Timespan: 2006 - 2010

Sampling Frequency:

Data Collection Summary / Methods: Alfredo or Cosmos shrimp trawl; the Alfredo trawl is 3.0 knots towed for 30 minutes and for the Cosmos trawl 2.6 knots for 15 minutes. Trawl geometry is monitored for door spread, net height and bottom contact with wing spread introduced in 2009. Shrimp surveys sample waters from 100-800m stratified in contours of 100-200, 200-300, 300-400, 400-600 and 600-800m. Samples were collected to examine fecundity and stomach contents of both Pandalid species. Greenland halibut surveys sample waters from 400-1500m.

Data collected: species id (Pandalus borealis, Pandalus montagui, Reinhardtius hippoglossoides), abundance, environmental data, temperature, salinity and depth

OBIS data schema: species name, individual count, date, location, temperature, depth, salinity, nitrogen, oxygen, silicate.

Known Issues: weaknesses, limitations, errors, caveats, etc.

Best Practices: tips for separating the wheat from the chaff
Conditions for use: 'freely available' and 'open-access' as per OBIS:

Citation/ Distributing Authors: Siferd, Tim. Central and Arctic Multi-Species Stock Assessment Surveys. OBIS Canada Digital Collections (2010). Bedford Institute of Oceanography, Dartmouth, Nova Scotia, Canada (OBIS Canada). 

Supplemental resources:

Canada Department of Fisheries and Oceans Central and Arctic Region -

2008 Shrimp Fisheries Report -

Available via the EcoData Retriever: No

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