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Department of Fisheries Oceanography Seminar Announcement - Steve Cadrin

When: Wednesday, October 20, 2021
2:30 PM - 3:30 PM
Where: > See description for location
Description: The School for Marine Science and Technology
Department of Fisheries Oceanography
Seminar Announcement

"Cod Damned? What's Up with New England Groundfish?"

Steve Cadrin
Department of Fisheries Oceanography
School for Marine Science and Technology
University of Massachusetts Dartmouth

Wednesday, October 20, 2021
2:30 pm to 3:30 pm
SMAST East, Rooms 101/102
Also Via Zoom

After decades of intense fishing from foreign and domestic fleets, fishery restrictions were designed to rebuild overfished groundfish stocksin the mid-1990s. Rebuilding plans were successful for several groundfish stocks, but others remain near record-low abundance even with little targeted fishing or
bycatch. The mixed stock fishery is constrained by low catch limits of rebuilding ‘choke stocks’ for harvesting healthy stocks. The cause of slow rebuilding is uncertain but appears to involve a combination of decreased productivity, under-reported catch, and mis-specified stock assessments that
led to continued overfishing, despite precautionary harvest controls. Recent management strategy evaluations conditioned on Gulf of Maine cod and Georges Bank haddock tested the performance of the current groundfish management procedure and alternatives in the context of biased catch and changes in productivity (i.e., natural mortality rates or recruitment). Results suggest that precautionary management procedures perform relatively well if stock assessment are well specified, even with moderate under-reporting of catch. However, simulation testing showed that rebuilding objectives cannot be achieved when management is informed by mis-specified stock assessment models. The next
step in evaluating cod fisheries is to investigate performance of the current management procedure as well as spatial alternatives (including revised management unit boundaries or assessment of mixed populations) for conserving and rebuilding spatially-complex cod populations,. These evaluations are
intended help to inform the best scientific information available for managing cod fisheries for the 2023 research track stock assessment.
Zoom Link
Meeting ID: 937 5823 0260
Passcode: 426839

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Contact: > See Description for contact information
Topical Areas: School for Marine Sciences and Technology, SMAST Seminar Series