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Transboundary Resources Assessment Committee Status Report 2017/02 : Eastern Georges Bank Haddock
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2017
[PDF-892.31 KB]
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Alternative Title:2017. TRAC Eastern Georges Bank Haddock Status Report 2017/02
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Description:Combined Canada and USA catches in 2016 were 12,409 mt. At the beginning of 2017, adult biomass was 274,482 mt. A preliminary estimate for the 2016 year class is 111 million age 1 fish. The current estimate for the 2013 year class is 885 million age 1 fish, which would make it the largest cohort in the assessment time series, followed by the 2010 year class at 243 million. Except for the recent strong year classes, recruitment has fluctuated between 1.8 and 26.1 million since 1990. Fishing mortality (F) was below F[ref] = 0.26 during 1995 to 2003, fluctuated around 0.35 in 2004 to 2006, then declined to 0.15 in 2008. Fishing mortality increased to levels above F[ref] from 2010 to 2014 before dropping off again in 2015. In 2016, F was estimated at 0.10 (80% confidence interval: 0.08-0.14), well below F[ref]. Recruitment, as well as age structure, spatial distribution, and fish growth reflect changes in the productive potential. Recruitment, while highly variable, has generally been higher when adult biomass has been above 40,000 mt, and the stock has produced several exceptionally strong year classes in the last 16 years. There has been a general decline in weights at age since the late 1990s. As biomass has increased growth rates and asymptotic length have declined. This decline in size at age appears to be exacerbated for the 2013 year class. Fish condition has generally been below the time series average since 2004 for all three surveys and was the lowest in the time series for both the DFO and NMFS spring surveys in 2017.
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Rights Information:Public Domain
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Compliance:Submitted
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