The basic driving force: Oceanography
Original version
This report is not to be cited without prior reference to the authorAbstract
As early as the beginning of this century it was shown that variations
in physical conditions have great influence on the biological
conditions of various fish species. During the period 1930-1970, the
magnitudes of commercial catches were used as a measure of fish
concentrations and abundance, and the changes in the main fishing
areas were related to variations in temperature.