Investor Presentaiton
Conclusions
In 2000-2010 a number of south-latitude fish species in the Tatar Strait and
southwestern part of the Okhotsk Sea has increased in comparison with the 1980-
1990s. Stock abundance of walleye pollock, herring, Far East capelin was low in most
areas, but Japanese anchovy, saury, arabesque greenling were comparatively high-
abundant.
Significant changes in stock abundance have been observed for many fish species in
the Tatar Strait and southwestern part of the Okhotsk Sea during 1950-2010.
Changes in abundance, revealed for different fish species, had different-directed
trends and were independent from any belonging to biogeographic or ecological
groups of fishes.
Changes in fish abundance in the Tatar Strait and southwestern part of the Okhotsk
Sea occurred against the background of increase in Siberian High Index and PDO
Index, decrease in MOI Index, increase in water temperature in the eastern part of the
Japan/East Sea in the 1980s and especially in the 1990s, and decrease of ice cover of
the Okhotsk Sea during the last 30 years.
Major south-latitude fish species of the Tatar Strait were more frequent in the years of
higher intensity of the Tsushima Current and lower monsoon intensity as well; near
the eastern Sakhalin these species were more frequent in the years when ice cover was
minimal in the Okhotsk Sea.
There was revealed a general trend: a comparatively high abundance of fishes that
spawn in winter-spring was observed in the periods when intensity of the warm
Tsushima Current lowered. In the years of high intensity of Tsushima Current, the
abundance of summer-autumn spawning fishes increased.View entire presentation