A. GULF OF MAINE ATLANTIC COD ASSESSMENT SUMMARY FOR 2012
In what follows, there are two population assessment models and a result is presented for each model. The first number is from the M0.2 (natural mortality, M=0.2) assessment model and the second number is from the MRamp (M ramps from 0.2 to 0.4) assessment model (see Data and Assessment section belo...
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.386.4182 http://www.nefsc.noaa.gov/publications/crd/crd1301/parta.pdf |
| Summary: | In what follows, there are two population assessment models and a result is presented for each model. The first number is from the M0.2 (natural mortality, M=0.2) assessment model and the second number is from the MRamp (M ramps from 0.2 to 0.4) assessment model (see Data and Assessment section below for a description of the models). State of Stock: The Gulf of Maine Atlantic cod (Gadus morhua) stock is overfished and overfishing is occurring (Figure A1). Spawning stock biomass (SSB) in 2011 is estimated to be 9,903 mt or 10,221 mt which is 18 % or 13 % of the SSBMSY proxy (54,743 mt or 80,200 mt) in the M0.2 or MRamp models, respectively (Figure A2). The 2011 fully selected fishing mortality is estimated to be 0.86 or 0.90 which is about 4 or 5 times the FMSY proxy (0.18 for both models) (Figure A3). Projections: Based on recommendations made in 2011 by the SARC 53 Panel, the short term projection method samples from a cumulative density function derived from ASAP estimated age-1 |
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