**CRUISE REPORT**

**Cruise Number/Leg Number:** OS180/Leg2 (FOCI 1OM07)

**Area of Operations:**

> Southeastern Bering Sea, St. Lawrence Island Polynia (SLIP), and Mouth
> of Yukon River.

**Itinerary**

**Date depart/port:** July 24, 2007/Dutch Harbor, AK

**Date arrive/port:** August 3, 2007/ Nome, AK

**Participating organizations:**

NOAA -- Alaska Fisheries Science Center (AFSC)

**Group Leader (Chief Scientist):**

Morgan Busby M / AFSC

Telephone: (206)526-4111

E-mail: <Morgan.Busby@noaa.gov>

**Personnel:**

Kevin Bailey M /AFSC

Colleen Harpold F / AFSC

**Cruise Objectives:**

The objectives of this cruise were to continue the long-term acquisition
of biological and physical data relating to the summer abundance and
distribution of walleye pollock (*Theragra chalcogramma*) larvae and
juveniles in the eastern Bering Sea continental shelf region. This is a
continuing cooperative research effort between FOCI and the scientists
at Hokkaido University in Hakodate, Japan.

**Summary of Operations:**

**Operation Tows**

20cm bongo (20Bon) 12

60cm bongo (60Bon) 12

CalCOFI vertical egg tow net (CALVet) 12

Methot net on Japanese trawl frame (MBT) 19

**Samples Collected Tows Number**

Microzooplankton samples preserved in formalin (MZ) 12 12

Quantitative tow preserved in formalin (QTowF) 66 71

Rough count of Pollock juveniles (RCountJ) 19 163

**Summary of Cruise:**

**Narrative:**

We were able to complete all of our objectives of this cruise. Larval
and juvenile walleye pollock were collected at only 9 of 19 stations
sampled by MBT (Methot inner and outer net on Japanese rigid mid water
trawl frame) and were found in lower in abundances and of smaller length
than collected in previous cruises. The primary gear used (MBT) worked
as expected. We also used 20/60 cm bongo and CalVet nets to sample
zooplankton. Additional physical and biological data were collected by
Japanese and other scientists aboard using CTD's, Niskin bottles, NORPAC
and bongo nets, and other types of gear.

**Recommendations:**

None

**Acknowledgments**

We would like to thank Professor Sei-Ichi Saitoh, Dr. Jun Yamamoto, and
the officers, crew, and students aboard the T/S Oshoro Maru for their
assistance and hospitality.

**Attachments:**

Table 1. Cruise Statistics

Table 2. Cruise Summary

Figure 1. Station Map

Figure 2. Juvenile Rough Count (#/10m2)

**Table 1. Cruise Statistics**

**Gears Used** **Tows**

20cm bongo (20Bon) 12

60cm bongo (60Bon) 12

CalCOFI vertical egg tow net (CalVET) 12

Methot net on Japanese trawl frame (MBT) 20

**Samples Collected** **Tows** **Number**

Quantitative tow preserved in formalin (QTowF) 66 71

Rough count of pollock juveniles (RCountJ) 18 163

**Table 2. Cruise Summary For FOCI Cruise 1OM07 (OS180)**

**Date** **Time** **FOCI** **Alternat** **Depth**

**(GMT)** **(GMT)** **Station** **Haul** **Grid** **Station** **(m)**
**Latitude** **Longitude** **Gear** **SamplesCollected**
**HaulComments**

25-Jul-07 6:16 1 1 B02 OS07079 119 55 30.08 N 165 59.73 W 20Bon QTowF
Gear depth determined by wire angle and wire

out.

25-Jul-07 6:16 1 1 B02 OS07079 119 55 30.08 N 165 59.73 W 60Bon QTowF
Gear depth determined by wire angle and wire

out.

25-Jul-07 6:58 1 2 B02 OS07079 119 55 29.90 N 165 59.13 W CalVET QTowF
Nets 1 and 2 combined into 1 jar. Tow time

estimated from Calvet tow 2 because the this

tow was timed incorrectly.

25-Jul-07 7:13 1 3 B02 OS07079 119 55 30.19 N 165 59.13 W MBT QTowF,
RCountJ Zooplankton to Keriyama.

25-Jul-07 12:30 2 1 B03 OS07080 113 55 59.40 N 165 58.09 W MBT QTowF,
RCountJ plus one mystery fish.

25-Jul-07 15:45 3 1 B04 OS0781 133 56 00.01 N 166 59.61 W 20Bon QTowF

25-Jul-07 15:45 3 1 B04 OS0781 133 56 00.01 N 166 59.61 W 60Bon QTowF

25-Jul-07 16:47 3 2 B04 OS07081 132 55 59.85 N 166 59.70 W CalVET QTowF
Nets 1 and 2 combined into 1 jar.

25-Jul-07 17:14 3 3 B04 OS07081 132 56 00.61 N 167 00.76 W MBT QTowF,
RCountJ

25-Jul-07 20:32 4 1 B05 OS07082 134 55 59.47 N 167 57.44 W 20Bon QTowF

25-Jul-07 20:32 4 1 B05 OS07082 134 55 59.47 N 167 57.44 W 60Bon QTowF

26-Jul-07 21:26 4 2 B05 OS07082 134 55 59.91 N 167 59.80 W CalVET QTowF
Nets 1 and 2 combined in one jar.

26-Jul-07 17:54 5 1 B10 OS07085 114 56 29.54 N 168 00.41 W CalVET QTowF
Nets 1 and 2 combined in one jar.

26-Jul-07 19:49 5 2 B10 OS07085 118 56 29.33 N 168 02.13 W MBT QTowF,
RCountJ 3 large jellies removed.

26-Jul-07 20:24 5 3 B10 OS07085 115 56 29.95 N 168 01.93 W 20Bon QTowF
Net 1 of 20bon got wrapped around wire so

preserved net 2 instead.

26-Jul-07 20:24 5 3 B10 OS07085 115 56 29.95 N 168 01.93 W 60Bon QTowF

27-Jul-07 3:32 6 1 B11 OS07086 104 56 30.10 N 166 59.66 W MBT QTowF,
RCountJ

27-Jul-07 7:07 7 1 B12 OS07087 85 56 30.08 N 166 00.26 W MBT QTowF,
RCountJ 1/5 subsample (210/1050 g) by weight. Mostly

euphausiids.

27-Jul-07 11:04 8 1 B13 OS07088 72 56 59.28 N 165 59.50 W CalVET QTowF
Nets 1 and 2 combined in one jar.

27-Jul-07 11:41 8 2 B13 OS07088 71 56 58.56 N 165 57.37 W 20Bon QTowF

27-Jul-07 11:41 8 2 B13 OS07088 71 56 58.56 N 165 57.37 W 60Bon QTowF

27-Jul-07 12:03 8 3 B13 OS07088 73 56 59.23 N 165 57.78 W MBT QTowF,
RCountJ 159/574 = 0.2770034 split.

27-Jul-07 16:02 9 1 B14 OS07089 71 56 59.90 N 166 59.77 W CalVET QTowF
Nets 1 and 2 combined in one jar. Actual tow

time was not recorded. Used an estimated tow

time from previous tows.

27-Jul-07 18:04 9 2 B14 OS07089 70 56 59.02 N 166 59.59 W 20Bon QTowF

27-Jul-07 18:04 9 2 B14 OS07089 70 56 59.02 N 166 59.59 W 60Bon QTowF

27-Jul-07 18:23 9 3 B14 OS07089 71 56 59.00 N 166 59.21 W MBT QTowF,
RCountJ

28-Jul-07 2:38 10 1 B15 OS07090 75 57 01.96 N 167 57.20 W MBT QTowF,
RCountJ

28-Jul-07 6:43 11 1 B16 OS07091 77 57 00.52 N 168 59.46 W MBT QTowF,
RCountJ

28-Jul-07 10:42 12 1 B19 OS07092 67 57 30.51 N 168 56.86 W MBT QTowF,
RCountJ subsampled .5L /10L = 0.05

28-Jul-07 13:47 13 1 B20 OS07093 69 57 29.97 N 167 59.47 W CalVET QTowF
nets 1 and 2 combined into one jar.

28-Jul-07 14:50 13 2 B20 OS07093 69 57 30.40 N 168 00.48 W 20Bon QTowF

28-Jul-07 14:50 13 2 B20 OS07093 69 57 30.40 N 168 00.48 W 60Bon QTowF

***Wednesday, August 01, 2007*** ***Page 1 of 2***

**Cruise Summary For FOCI Cruise 1OM07 (OS180)**

**Date** **Time** **FOCI** **Alternat** **Depth**

**(GMT)** **(GMT)** **Station** **Haul** **Grid** **Station** **(m)**
**Latitude** **Longitude** **Gear** **SamplesCollected**
**HaulComments**

28-Jul-07 15:05 13 3 B20 OS07093 72 57 30.42 N 167 59.28 W MBT QTowF,
RCountJ \~10 small jellifish removed. Eulacon caught in

sample is most likely a bait fish used on the

long line that was soaking at this station.

28-Jul-07 21:01 14 1 B21 OS07094 66 57 29.75 N 167 00.23 W CalVET QTowF
nets 1 and 2 combined in one jar.

28-Jul-07 21:27 14 2 B21 OS07094 66 57 29.79 N 167 00.20 W 20Bon QTowF

28-Jul-07 21:27 14 2 B21 OS07094 66 57 29.79 N 167 00.20 W 60Bon QTowF

28-Jul-07 21:51 14 3 B21 OS07094 66 57 30.40 N 167 00.00 W MBT Discard
Cod end opened during tow.

28-Jul-07 22:15 14 4 B21 OS07094 66 57 30.38 N 166 58.46 W MBT QTowF,
RCountJ

29-Jul-07 1:33 15 1 B22 OS07095 64 57 30.18 N 165 59.65 W CalVET QTowF
nets 1 and 2 combined into one jar.

29-Jul-07 1:43 15 2 B22 OS07095 64 57 30.37 N 165 59.47 W 20Bon QTowF

29-Jul-07 1:43 15 2 B22 OS07095 64 57 30.37 N 165 59.47 W 60Bon QTowF

29-Jul-07 1:57 15 3 B22 OS07095 64 57 30.82 N 166 00.03 W MBT QTowF,
RCountJ

29-Jul-07 6:34 16 1 B23 OS07096 54 57 59.76 N 165 57.16 W MBT QTowF,
RCountJ

29-Jul-07 13:18 17 1 B25 OS0797 26 58 59.99 N 166 00.72 W MBT QTowF

31-Jul-07 2:10 18 1 B37 OS07100 70 62 32.25 N 174 39.17 W CalVET QTowF
Nets 1 and 2 combined into one jar.

31-Jul-07 2:48 18 2 B37 OS07100 70 62 32.32 N 174 39.78 W 20Bon QTowF

31-Jul-07 2:48 18 2 B37 OS07100 70 62 32.32 N 174 39.78 W 60Bon QTowF

31-Jul-07 3:11 18 3 B37 OS07100 70 62 31.55 N 174 39.52 W MBT QTowF,
RCountJ

31-Jul-07 8:53 19 1 B28 OS07101 55 62 20.56 N 172 40.16 W CalVET QTowF
Slight wire angle about 15 degrees. Nets 1 and

2 combined.

31-Jul-07 1:00 19 2 B28 OS07101 55 62 20.56 N 172 40.41 W 20Bon QTowF

31-Jul-07 1:00 19 2 B28 OS07101 55 62 20.56 N 172 40.41 W 60Bon QTowF

31-Jul-07 1:17 19 3 B28 OS07101 55 62 20.71 N 172 41.46 W MBT QTowF,
RCountJ 1/10L = 0.1 subsample. All amphipods.

01-Aug-07 3:40 20 1 B33 OS07103 41 62 39.02 N 171 16.46 W CalVET QTowF
Nets 1 and 2 combined in one jar.

01-Aug-07 4:12 20 2 B33 OS07103 42 62 39.38 N 171 17.80 W 20Bon QTowF

01-Aug-07 4:12 20 2 B33 OS07103 42 62 39.38 N 171 17.80 W 60Bon QTowF

01-Aug-07 4:32 20 3 B33 OS07103 42 62 38.92 N 171 17.16 W MBT QTowF,
RCountJ

***Wednesday, August 01, 2007*** ***Page 2 of 2***

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