The incredible shrinking Georges Bank haddock (Melanogrammus aeglefinus)

The incredible shrinking Georges Bank haddock (Melanogrammus aeglefinus)

J.K.T. Brodziak and J.S. Link

The incredible shrinking Georges Bank haddock (Melanogrammus aeglefinus)This is part of Resiliency of Gadid Stocks to Fishing and Climate Change
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Description

The Georges Bank haddock stock began to recover from a state of near collapse (5% of BMSY) in the mid-1990s after portions of the stock were protected by large-scale, year-round, closed areas. The stock produced an exceptionally abundant year class in 2003 and may provide the potential to rebuild the stock to BMSY in the near future. Coincident with this exceptional recruitment event, consistent annual decreases in haddock mean lengths and weights at age have occurred across all age groups since 2001. We investigated how stock density, consumption, and temperature variations during 1968-2004 affected haddock growth by using assessment results and food habit data collected from research surveys. Time series of bottom-water temperature anomalies and cohort-specific growth data were used to investigate the effects of changes in stock density and temperature on growth. The Georges Bank haddock stock shows clear signs of density-dependent growth, an important consideration in stock recovery and assessment.

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