At Mangalore, studies on the mackerel fishery were initiated in 1957. The
programme of work was intensified from 1958 onwards and detailed observations
were made particularly at Ullal, an important fishing centre near
Mangalore. This paper deals with certain interesting observations made
during the years 1957-61 at Ullal and other centres in the region between
Kasargod and Malpe, especially in regard to growth, maturity, and trends
of catches. The von Bertalanffy growth equation has also been applied to
the length-frequency data and tentative estimates of the parameters obtained.
In order to study the variation in catches in relation to certain factors, the
data collected by one of us (K. V. S.) at Malpe during 1954-55 have been
incorporated
