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Post-Season Survey Demonstrates Groundfish Predation Concentrated in Offshore 2J3K

March 5, 2026

Onboard observers and technicians recorded the presence of groundfish in crab pots during the post-season CPS survey in 2025. As expected, groundfish are not distributed evenly throughout the survey area but are concentrated in the offshore portions of 3K and 2J.

Groundfish were present in 24% of small mesh pots in 3K4, compared to less than 1% of small mesh pots in 3K inshore. Similarly, groundfish were found in small mesh pots in 25% of offshore 2J stations, versus 3% of inshore 2J stations.

Groundfish were less common in 3Ps, occurring in only 9% of all small mesh pots (5% inshore and 12% offshore). Groundfish were rare in pots in 3LNO and 4R, occurring in only 4% and 5% of small mesh pots in those assessment divisions overall.

These data were presented at the 2026 assessment.

It is clear that groundfish predation impacts are uneven across the stock area. The sight of cod, skate, and catfish in their crab pots during the spring fishery and fall survey was not new to 2J and 3K offshore harvesters.

Questions remain regarding how these predators affect trap survey indices of crab biomass and recruitment. We continue to work on the unanswered questions from the 2026 assessment.

Crab harvesters from 3K and 2J and the FFAW continue to press DFO Science and Resource Management to address criticisms and acknowledge on-the-water observations of a rapidly but unevenly changing marine environment. This means, as a start, to consider the status of inshore and offshore 3K CMAs separately, given the very different predator and catch rate profiles.

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Dr. Erin Carruthers

Dr. Erin Carruthers is the Science Director and Senior Fisheries Scientist with the Fish, Food and Allied Workers Union (FFAW-Unifor), which is the labour union that represents the owner-operator fleet in Newfoundland and Labrador. The FFAW is committed to research and management that supports healthy oceans, fisheries, and coastal communities. Dr. Carruthers received her Ph. D. in Biology from Memorial University in 2011 followed by a postdoctoral fellowship with the Centre for Fisheries Ecosystems Research. Before coming to Newfoundland, Erin worked as a Research Biologist with Fisheries and Oceans Canada at the St. Andrews Biological Station. Her current research program is co-constructed with fish harvesters and includes research on coastal fishing communities, collaborative longline and trap surveys, and best practices for the avoidance, handling and release of unwanted catch.