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Cruise No: PK98-01

FOCI Number: 1PK98



Area of Operations:

Southeast Bering Sea


Depart Dutch Harbor September 6
Arrive Dutch Harbor September 18

Participating organizations:

AFSC - Alaska Fisheries Science Center (NOAA), Seattle, Washington
TINRO - Pacific Scientific Research Center, Vladivostok, Russia
PMEL - Pacific Marine Environmental Laboratory (NOAA), Seattle, Washington
UW - University of Washington, Seattle, Washington
PMC - Pacific Marine Center, Seattle, Washington


Chief Scientist:

 Richard Brodeur  AFSC


 U.S.A.    Russia  
 Matthew Wilson  AFSC  Michael Stepanenko  TINRO
 Bill Floering  PMC  Victor Lapko  TINRO
 Annette Brown  AFSC  Alexander Nikolayev  TINRO
 Elaina Jorgensen  UW  Paul Matushkin  TINRO
 Frank Morado  AFSC  Michael Kuznetsov  TINRO
 Kurt Zegowitz  PMEL  Igor Ubarchek  TINRO
 Chris Baier  UW  Alexander Belyakov  TINRO
 Suzanne Speckman  UW    
 Carolyn Kurle  AFSC    


1) Continue acquisition of long-term biological and physical time series,

2) Conduct acoustic and trawl survey of juvenile walleye pollock for examining distributions in relation to hydrographic fronts,

3) Collect samples of juvenile pollock for studies of growth, feeding, pathology, and condition,

4) Conduct hydrological and biological data along monitoring transect and at mooring sites,

5) Collect midwater and demersal predators upon juvenile pollock,

6) Examine distribution of seabird and marine mammal predators in the vicinity of the Pribilof Islands,

7) Conduct exploratory midwater trawling in deep water using Russian midwater trawl.



Cruise Summary:

a) Proceeded to offshore end Line D off St. George Island (Fig. 1) and began CTD survey heading north. An acoustic transect was done both day and night on this transect. Tucker tows and Methot, and anchovy trawls were made along this transect at stations inshore, at and offshore of the front. Additional sampling with the bottom trawl was done in the Pribilof Canyon to investigate the fish and invertebrate fauna of this region.

b) Proceeded to the offshore station of Line C on the north side of St. George. (Fig. 1). Conducted similar physical, biological and acoustic sampling operations as described previously including trawling for fish predators. Did intensive sampling on each size of a frontal margin separating typical Bering Sea water from unusual colored water caused by a massive coccolithophore bloom.

c) Proceeded to front on Line B south of St. Paul and continued physical, acoustical and biological sampling as before.

d) Proceeded to Line A north of St. Paul and continued physical, acoustical and biological sampling as before. Conducted 5 acoustic transects and 5 bottom trawls along this transect in addition to regular sampling.

e) Began Monitoring transect on the morning of 14 September and spent whole day within the coccolithophore bloom. Conducted intensive sampling with bongo and Calvet net at Moorings 2, 3, and 4. Strong winds and rough seas caused us to drop bongo net sampling at several locations.

f) Did an experimental trawl in deep water at the shelf break using the large Russian rope trawl. Caught mostly adult pollock, squid, and lanternfishes in this trawl.

g) Proceeded to Dutch Harbor and arrived on the morning of 18 September.



Table 1. Cruise Summary

Table 2. Cruise Statistics

Figure 1. Plot of stations sampled. plot 1, plot 2

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