Alaska Pollock, Sea of Okhotsk, Mid-water otter trawl

Theragra chalcogramma
Content last updated
16 July 2019
Stock
Alaska Pollock, Sea of Okhotsk
Management
Russia
Stock Status
2 of 5
Low risk
Management
1 of 5
Very low risk
Bycatch
2 of 5
Low risk
Habitat
1 of 5
Very low risk

Stock status

2 of 5
Low risk

Alaska Pollock of Sea of Okhotsk has been scored low risk. The stock is in a safe condition with the exploitation rate close to optimum

This is because the spawning stock biomass (SSB) in 2018 was projected to be above SSB (FMSY) following a few years of good recruitment and fishing mortality has been reduced to around FMSY in the last decade. Reductions in recent fishing mortality are likely to have increased recruit survivorship and thus spawning biomass. There is negligible probability that SSB by the start of 2019 will decline outside safe biological limits (below BLIM), assuming a total 2018 catch <1.1 million tonnes. 

Management

1 of 5
Very low risk

The management of Alaska Pollock of the Sea of Okhotsk has been scored a very low risk. This is because there is an effective regulatory framework in place based on a comprehensive annual stock assessment. Recent TAC levels have been set lower than those provided by the scientific advice. 

Bycatch

2 of 5
Low risk

The bycatch in the Alaska Pollock fishery has been scored a Low risk. This is because the bycatch is extremely low, ranging from 0.26 to 4.55 (mean 1.4) % depending on area, gross registered tonnage and month. Bycatch species are usually processed onboard into fish meal. Most of the bycatch is Pacific herring, which is strictly controlled through catch limits, for instance where higher (than 2%) catch proportions are reported, these species are accommodated within the allowable catch limits and total allowable catch for the species. Observer data showed no evidence or records of mortality of marine mammals or sea birds (O’Boyle et al., 2013).

Habitat

1 of 5
Very low risk

The habitat impact of the Alaska Pollock fishery has been scored a Very Low risk. This is because mid-water trawls can occasionally interact with seafloor habitats, but there is spatial management in place to restrict the footprint of this gear.