Each September for the last 46 years, DFO scientists take to sea for an expedition to assess the abundance and distribution of fish and invertebrates in the Southern Gulf of St. Lawrence and to measure oceanographic variables. Since 2004, the survey is done on a Canadian Coast Guard vessel, the Teleost.
In 2016, the survey was performed from September 6 to 29.
- 14 scientists and 21 crew members were on board
- 190,636 fish and crustaceans have been caught
- 162 successful trawl have been hauled
- 9 oceanographic variables have been measured at each survey haul – These variables, such as water temperature, plankton, salinity, nutrients, pH and oxygen are key components of species habitat
- 7,096 otoliths have been sampled – Otoliths are calcareous structures in the fish inner ear. The age and growth of the fish can be observed through them; in the same manner one reads the rings on a tree trunk.
- 65,188 fish and crustaceans have been individually measured
- 64 Fish species have been observed
FISH AND CRUSTACEANS MEASURED – Combined with other information, the following data helps assess the relative abundance by size and species.
- 105 Atlantic Halibut
- 913 Witch Flounder
- 958 Mackerel
- 1,165 Greenland Halibut
- 2,169 Rainbow Smelt
- 2,195 Atlantic Cod
- 2,492 Winter Flounder
- 3,189 Spider Crab
- 3,343 Yellowtail Flounder
- 3,518 Herring
- 3,740 Capelin
- 3,940 Redfish
- 3,942 Lobster
- 12,589 Snow Crab
- 13,526 American Plaice
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