Marine Station, Hokkaido University
The Oshoro Marine
Biological Station belonging to Hokkaido University was founded in 1908. The
station is located in a small bay named Oshoro Bay on the west coast of
Hokkaido. The bay is protected from wind
and waves by steep rocky cliffs on both sides, providing a profitable
collection place of shore animals and algae, as well as an area for various
kinds of experimental work under natural conditions.
variations of air temperature of this area are -4.1~20.9, the sea surface
temperature and specific gravity are 5.1~21.9 and 20.39~25.60Β15respectively.
The bay is an inlet on the coast of a large
bay, Ishikari Bay where the warm Tsushima Current prevails during summer to
autumn, while in the other seasons the cold water of the Liman Current is mixed
with coastal water. This results give characteristic features to the shore
fauna, the flora and also those of plankton on the northern coast of Japan
Islands facing the Sea of Japan.
never been resident biologists at this station. Various kinds of collections
and experiments have been made by visiting scientists. Studentsf courses have
been held frequently at this station.
as reported, 208 species of marine algae have been collected on the shore. 389
species of invertebrates collected on the shore, by dredging and by commercial
gill net fishing and 85 species of fishes collected on the shore and by
commercial gill net fishing in the bay and neighbouring areas are listed.
Plankton calendar dealing with 291 species is compiled. Seasonal changes in plankton abundance in each
year from 1949 to 1969 are illustrated, indicating that there have been
remarkable spring bloomings but not always. In some years autumn bloomings are
more pronounced than spring bloomings.
(Motoda S. 1971)