Atka Mackerel Research
Atka mackerel (Pleurogrammus monopterygius) is
a schooling, semi-demersal species distributed from the east coast of
the Kamchatka Peninsula, Russia, throughout the Komandorskiye and Aleutian
Islands, north to the Pribilof Islands, and eastward through the Gulf
of Alaska to Southeast Alaska. Their center of abundance has been in
the Aleutian Islands region, particularly from Buldir Island to Sequam Pass.
Click for underwater
Atka mackerel begin to recruit to the fishery at age 2 and many survive
to 14 years. Fifty percent of the female population is estimated to have
reached maturity at 31 cm (about 3.6 years old). Atka mackerel
migrate from the shelf edge to shallow coastal waters (5-30 m) to spawn.
Spawning occurs in July -September along the Aleutian Islands. Eggs are
adhesive and deposited in rock crevices. These nest are guarded by the
males until hatching, which occurs about 40-45 days later. Atka mackerel
eat copepods and euphausiids and, in turn, are prey
for other fish, seabirds,
sea lions, and other marine mammals.
The patterns of the Atka mackerel fishery generally reflect the behavior
the the species:
- the fishery is highly localized and usually occurs in the same few locations each year
- the schooling semi-demersal nature of the species makes if particularly
susceptible to trawl gear fished on the bottom
- trawling occurs almost exclusively at depths less than 200 m.
Atka mackerel are a very difficult fish to survey because:
- they do not have a swim bladder, making them poor targets for hydroacoustic surveys
- they prefer hard, rough and rock bottom which makes sampling with
standard survey bottom trawl gear difficult
- their schooling behavior and patchy distribution make the species susceptible to
large variances in catches, which greatly affect area-swept estimates of biomass
During 2012, pollock made up 61.9% of the total groundfish catch off Alaska. The pollock catch for 2012 was 1,310,330 metric tons (t), up approximately 2% from 2011.
The 2012 catch of flatfish, which includes yellowfin sole, rock sole and arrowtooth flounder, was 321,530 t or 15.2% of the total 2012 Alaska groundfish catch, down about 2% from 2011.
Pacific cod accounted for 329,040 t or 15.5% of the total 2012 Alaska groundfish catch. The Pacific cod catch was up about 8% from a year earlier.
Other important species (% of total 2012 catch and % change from 2011) are: Atka mackerel 49,020 t (2.3%, down 8%),
sablefish 13,850 t (0.7%, up 7%), and rockfish 55,450 t (2.6%, up 8%).
- McDERMOTT, S. F., D. W. COOPER, J. L. GUTHRIDGE, I. B. SPIES, M. F. CANINO, P. WOODS, and N. HILLGRUBER.
2011. Effects of maternal growth on fecundity and egg quality of wild and captive Atka mackerel. Mar. Coastal Fish. 3:324-335. (.pdf, 848 KB). Online.
- RAND, K. M., and S. A. LOWE.
2011. Defining essential fish habitat for Atka mackerel with respect to feeding within and adjacent to Aleutian Islands trawl exclusion zones. Mar. Coastal Fish. 3:21-31. (.pdf, 1.39 MB). Online.
- COOPER, D., and S. McDERMOTT.
2011. Seasonal, small-scale distribution of Atka mackerel in the Aleutian Islands, Alaska, with respect to reproduction. Mar. Coastal Fish. 3:10-20. (.pdf, 2.35 MB). Online.
- RAND, K. M., D. A. BEAUCHAMP, and S. A. LOWE.
2010. Longitudinal growth differences and the influence of diet quality on Atka mackerel of the Aleutian Islands, Alaska: Using a bioenergetics model to explore underlying mechanisms. Mar. Coastal Fish. 2:362-374. (.pdf, 385 KB). Online.
- Local Abundance and Movement of Atka Mackerel and Other Steller Sea Lion Prey in the Aleutian Islands (2014 version)
By: SUSANNE F. McDERMOTT, KIMBERLY RAND, ELIZABETH LOGERWELL, TODD LOOMIS
Conference: Alaska Marine Science Symposium, Anchorage, AK, Jan 2014
(2014 poster, .pdf, 3.87 MB) Online.
- Local Abundance and Movement of Atka Mackerel and Other Steller Sea Lion Prey in the Aleutian Islands
By: SUZANNE F. McDERMOTT, ELIZABETH LOGERWELL, KIMBERLY RAND, LYNN LEE
Conference: Western Groundfish Conference (17th), Seattle, WA., Feb 2012
(2012 poster, .pdf, 19 MB) Online.
FIT Staff Conducts Successful Atka Mackerel Tag Recovery Cruise in the Aleutian Islands
Successful Atka Mackerel Tagging Cruise in the Western Aleutian Islands
Atka Mackerel Tag Recovery Cruise in the Aleutian Islands and Examination of Tagged Steller Sea Lion Prey Field In Situ
- Related AFSC research program reports and activities: Atka mackerel
- Additional publications, posters, and reports.
(Source: 2005 North
Pacific Groundfish Stock Assessment and Fishery Evaluation Reports for 2006.)