Date

n

n. group

Where

Source

May 1974

5

Iturup Okhotsk side

[6]

October 1975

10, 5

To NE cape Aniva, Sakhalin

[6]

August 1967

5

2

To E off cape Terpenia

[11]

June - July 1988

10

1

First Kuril Strait

[8]

August 1989

28

?

Okhotsk Sea without Shelikhov Bay

[8]

1990

53

?

Okhotsk Sea

[8]

1992

79

?

Okhotsk Sea

[8]

Summer 1988 and 1991

14

3

Okhotsk Sea

[7]

Autumn 1984 and 1986

6

1

Okhotsk Sea

[7]

July- August 1993

5

2

South of Okhotsk Sea

[12]

July - August 1997

25

5

Okhotsk Sea

[12]