CRUISE REPORT
Cruise Number: OM00-01
FOCI Number: 1OM00
Ship:
Oshoro Maru
Area of Operations:
Eastern Bering Sea
Itinerary:
Date depart / port: July 21, 2000 / Victoria, BC
Date arrive / port: August 3, 2000 / Dutch Harbor, AK
Participating organizations:
NOAA - Alaska Fisheries Science Center (AFSC)
Chief Scientist:
Bill Rugen
(206) 526-4339
Bill.Rugen@noaa.gov
Personnel:
Bill Rugen | M | AFSC |
Lorenzo Ciannelli | M | AFSC |
Jay Clark | M | AFSC |
Operation | Tows |
20cm bongo (20Bon) | 8 |
60cm bongo (60Bon) | 8 |
Van Dorn bottles (Bottles) | 2 |
CalCOFI vertical egg tow net (CalVET) | 8 |
10" inner diameter modified Clarke-Bumpus (LG-CB) | 4 |
Methot trawl (Meth) | 25 |
Samples Collected | Tows | Number |
Sebastes collected for Art Kendall
(ArtSebas) |
1 | 8 |
Methot thermocline density collections
for J.D. Anderson (JDADNSA) |
4 | 4 |
LG-CB thermocline density collections for
J.D. Anderson (JDADNSB) |
4 | 4 |
Pollock eye/lat. Line morphology collections
for J.D. Anderson (JDAMorph) |
4 | 320 |
Lorenzo Ciannelli juvenile pollock removed
for gut analysis (LCGut) |
5 | 140 |
Microzooplankton samples preserved in formalin
(MZ) |
8 | 8 |
Phytoplankton samples preserved in formalin
and collected from CTD casts (PhytoF) |
2 | 16 |
Quantitative tow preserved in formalin (QTowF) | 37 | 46 |
Rough count of pollock juveniles (RCountJ) | 21 | 3165 |
The cruise was a complete success. All of the historical core stations were occupied and sampled. Methots were conducted at 21 station (Fig. 1), and four extra samples were taken to investigate the relationship of size and abundance of larvae above and below the thermocline. 20 cm and 60 cm bongo tows and CalVET tows were conducted at eight stations. We again encountered a coccolithophore bloom at the northeastern most stations and were able to collect comparison water samples both in and out of the patch.
Pollock larvae and juveniles were found at all but one station (station 2) we sampled this year (Figs. 2 and 3). There were also several stations (stations 10 and 12 come to mind first) where there was a high abundance of very small pollock larvae that were not retained quantitatively by the Methot net. This became apparent when we washed down the net and small larvae were extruded through the relatively large mesh of the Methot net and codend. Lorenzo Ciannelli made additional collections of pollock larvae both in and out of the coccolithophore blooms for gut analysis.
Jellyfish abundance and weight were also measured at each station. Sebastes spp. larvae were collected at one station (21) and retained for genetic identification studies.
Figure 1. Station Map
Figure 2. Pollock Abundance Map
Figure 3. Contour Map of Pollock Abundance
Return to FOCI 2000 Field Operations Page
Return to FOCI Home Page
Return to PMEL Home Page