The different spatial and temporal
patterns of each class suggest
squid movement or migration. Our
results show northern and southern
migration patterns. One of the
northern migration patterns was
along Honshu Island to northern
areas of the Sea of Japan, another
ran along Korea’s east coast northward
through the Yamato Rise to
northern areas of the Sea of Japan.
The southern migration pattern was
a reversal of the northern migration
pattern (Fig. 11).
Another important finding is that
fishing activities occurred across a
wide area, and continued through-