|matiri (Maori), bonita, blue bream, deepsea trevalla, blue eye trevella (Australia), stone eye, Griffin’s silver fish, minami media (Japan)|
Bluenose is caught by longline and trawl and both fishing methods have ranked as red: worst choice seafood. An alternative is blue cod.
Bluenose is a long-lived, slow-growing relative of warehou. It is found in the temperate waters of the southern hemisphere. They are caught year round by trawl and longline, mainly around offshore reefs or drop off areas.
Bluenose is caught by both bottom trawl and longline. A key concern in the longline fishery is the estimated bycatch of over 550 seabirds annually. Trawling also catches seabirds but has a range of benthic impacts. In addition, there is the bycatch of non-target fish species such as sharks, limited research, lack of a management plan and the uncertainty over stock boundaries. Stocks have been reduced to under 20% of their unfished stock size and, at the current catch limits, it is likely that stock will continue to decline.
Not certified under any scheme.
Exports of about $8.56 million in 2015. Main markets are Australia (70%) and the United States (about 25%).
Longline and trawl were assessed. While longline-caught bluenose ranked slightly higher than trawl-caught, there was not a significant difference between them. Both ranked as red, worst choice seafood.
|Annual catch limit:||Limit set at 1110 tonnes since 2012-13 is being reduced to 910 tonnes from 1 October 2016.|
|Recorded catch:||Reported landings of 1104 tonnes in 2013-14.|
|Stock trends:||The 2016 assessment suggests that the biomass has levelled off or has increased slightly, after declining throughout the zone prior to cuts in catch limits.|
|MSY Status:||Stock size estimate in 2011 of 15% to 17%Bo depending on model assumptions.|
|The Ministry of Primary Industries assessment plenary report includes:||“Unlikely to be at or above the default target” and “as likely as not to be below the soft limit (20%Bo). Estimates of stock size in 2016 ranged from 17-27%Bo. The time to rebuild to the assumed target (40%Bo) under zero catches ranges from 10 to 13 years, depending on model assumptions.” Catches of 600-620 tonnes would rebuild the stock in 20-26 years. (MPI 2016, p 212-214).|
|Distribution:||Occurs around New Zealand, mainly around rocky areas at depths of 100-300m.|
|Maximum age (years):||76|
|Age at sexual maturity:||15-17|
|Ability to recover:||Low|
|Score:||Longline – C, trawl – E|
|Fishing method(s):||Caught by bottom longline (e.g. in the Bay of Plenty and off Northland), and as a bycatch in the alfonsino midwater trawl fishery (e.g. off the Wairarapa coast), and in target fisheries.|
Bottom longline:Lower impact on bottom communities than trawling, but can still damage sensitive habitat.
Trawl: Bulldozes the sea floor, destroying complex biogenic structures including soft corals, sponges and long-lived bryozoans. Impacts include loss of biodiversity, loss of benthic productivity and modification of important habitat like breeding or juvenile areas. (See alfonsino for more information.)
|Habitat of particular significance:||hasn’t been defined in New Zealand.|
Bottom longline: Non-target fish species including sharks.
Trawling: Non-target fish species including sharks and sponges and corals.
|Ecological effects:||The combined effects of seafloor damage and alteration, non-target fish bycatch, and protected and threatened species bycatch can have considerable ecological implications.|
|Score:||Longline – E, trawl – D|
Longline: An estimated seabird bycatch of 550 birds per year including cryptic mortality, including globally threatened black petrels in QMA1 and 2 (ranked very high risk in the Seabird Risk Assessment). The fishing industry has been focused on taking action to reduce its bycatch of threatened seabirds (see the Black Petrel Action Plan). While this current listing is based on the most recent bycatch assessment, this does not include the period where changes in practices have been applied, as they have yet to be assessed.
Trawl: Seabird and marine mammal bycatch. The seabird bycatch is part of the middle depth trawl fishery which is estimated at 1160 seabirds including cryptic mortality. Fur seal captures are likely to be low, especially around the east and north of the North Island coast. Bluenose is part of the middle depth fisheries that caught over 91 fur seals annually over the last 5 years. Protected coral species were reported caught in alfonsino tows in QMA 1, 2, 4 and 9. The corals caught include gorgonian, hydrocorals, black corals (Antipatharia) and stony corals (Scleractinia) – which includes reef-like, tree-like, and solitary small corals.
|Management component:||Single species. Stock boundaries are not known but similar declines in catches and other information suggest that there may be one stock or correlation between sub-stocks.|
|Quota Management Species:||Yes, since 1986.|
|Management plan:||There is no approved inshore plan.|
|Stock assessment:||2011 first quantitative stock estimates for all areas combined.|
|Research:||A new assessment on bluenose was undertaken in the last year.|
|Observer coverage:||About 1.5% for the last 5 years in the longline fishery, but it is not spatially or temporally representative of the fishing effort. Less than 2% in non-target trawl fisheries like alfonsino. Observer coverage in the northern inshore trawl fishery is less than 1.5 % per year.|
Taken from the Ministry for Primary Industries’ Plenary report for fisheries management.
Report from the Fishery Assessment Plenary, May 2016: stock assessments and yield estimates. Part 1: Introductory Section to Hoki, Science Group, MFish; Ministry for Primary Industries (2016) Aquatic Environment and Biodiversity Annual Review 2015. Compiled by the Fisheries Management Science Team, Ministry for Primary Industries. 682p. The Guidebook to New Zealand Commercial Fish Species, 2007 Revised Edition, The New Zealand Seafood Industry Council Ltd. Seafood New Zealand, 2016. New Zealand Seafood Exports to December 2015. 133p. Annual Review Report for Deepwater Fisheries for 2014/15. MPI Technical Paper No: 2016/09. Prepared by the Ministry for Primary Industries. March 2016. 103p. S.J. Baird, D. Tracey, S. Mormede, M. Clark (2013) The distribution of protected corals in New Zealand waters. Prepared for DOC, February 2013. 96p. MFish (2010) National Fisheries Plan for Deep-Water and Middle-Depth Fisheries, 2010. 51p. Tingley G (2014) An assessment of the potential for near-seabed midwater trawling to contact the seabed and to impact benthic habitat and Vulnerable Marine Ecosystems (VMEs). MPI Technical Paper No: 2014/30New Zealand. 2nd Meeting of the Scientific Committee of SPRFMO. 2014 SC-02-10.