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FN0636-Salmon: Fraser River Sockeye Update - August 11 - Areas 11 to 29 - Update‏

Category(s):
ABORIGINAL - General Information,
COMMERCIAL - Salmon: Gill Net,
COMMERCIAL - Salmon: Seine,
COMMERCIAL - Salmon: Troll,
RECREATIONAL - Salmon


Fishery Notice - Fisheries and Oceans Canada

Subject: FN0636-Salmon: Fraser River Sockeye Update - August 11 - Areas 11 to 29 - Update

The Fraser River Panel met today to review stock assessment data on the Fraser
River sockeye runs, plan fisheries, and discuss sockeye migration conditions in
the Fraser River watershed. Test fishing catches over the last few days have
generally been good after a short period of lower catches. DNA analyses
indicate that the stock composition of Fraser sockeye in the marine approach
areas has not changed much over the last week and currently stands at 33% Early
Summer-run, 29% Summer-run, and 37% Late-run sockeye. The last 3 day average
diversion rate of Fraser sockeye through Johnstone Strait is currently
estimated to be approximately 31%. There continues to be a strong migration of
sockeye into the Fraser. Total catch of Fraser sockeye to-date is approx.
1,000,000 fish and an escapement of 2,000,000.

At the meeting today, the run size estimate of 1.6 million Early Summer-run
sockeye was unchanged. The 50% marine migration timing of Early Summer-run
sockeye through Area 20 is estimated to be August 2. The estimated escapement
of Early Summer-run sockeye past Mission through August 10 is 967,000 fish.
Summer-run sockeye abundance assessments are ongoing. An estimate of their run
size should be available for Friday. The estimated escapement of Summer-run
sockeye past Mission through August 10 is 633,000 fish. DNA analyses of sockeye
samples from Juan de Fuca and Johnstone Straits indicate that Late sockeye are
the most abundant stock in the marine approach areas, which is consistent with
the pre-season forecast. A run size assessment for Late-run sockeye should be
available by about mid August unless their peak marine migration timing is
later than expected.

Late-run sockeye migratory behavior in terminal areas will be assessed over the
next several weeks in order to estimate the proportion of the run delaying in
the Strait of Georgia prior to entering the Fraser River. It is too early to
provide an assessment of the run size of Late-run sockeye, however, if they are
near their forecast level of abundance they will comprise most of the Fraser
sockeye migrating through the marine assessment areas in the coming weeks. At
the meeting today, the provisional run size estimate of 400,000 Harrison
sockeye was unchanged. The estimated escapement of Late-run sockeye past
Mission through August 10 is 537,000 fish.

On August 10 the discharge of the Fraser River at Hope was about 3,000 cms,
which is 21% below average for this date. The temperature of the Fraser River
at Qualark Creek on August 10 was 18.6 0C,which is 1.1 0C above average for
this date. Fraser River water temperatures at Qualark Creek are forecast to
increase to approximately 20 0C by August 18. Water temperatures between
approximately 19 0C and 20 0C can adversely affect the upstream migration of
Fraser sockeye and may cause en route mortality of some of these fish. At the
meeting today, after reviewing environmental and stock assessment information,
the management adjustment factor for Early Summer-run sockeye was unchanged at
0.84. Management adjustments are employed to help achieve spawning escapement
targets for Fraser River sockeye.

The following fisheries are planned:

Area B Seine: Please refer to FN 0624.

Area D Gill Nets: Please refer to FN 0626.

Area H Troll: Please refer to FN 0617.

Recreational fishing is open for sockeye retention in south coast marine areas
and in the Fraser River. Please refer to the specific Fishery Notices for
further details.

First Nation fisheries vary by areas with opportunities in marine areas, the
Fraser River area; consult with local DFO offices for openings.

The next Fraser River Panel meeting is scheduled for Friday, August 12th. A
further update will be provided on this date.

FOR MORE INFORMATION:

Barry Rosenberger 250-851-4892

Fisheries and Oceans Canada Operations Center - FN0636
Sent August 11, 2010 at 15:01
Visit us on the Web at http://www.pac.dfo-mpo.gc.ca
 
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