Distribution and biology of the striped marlin, Tetrapturus audax (PHILIPPI) taken by the longline fishery in the Indian Ocean

摘要

Fishery biological data of the striped marlin, Tetraptvl'us audax (PHILIPPI) (Jap: Makajiki)udobtainp.d by the Japanese commercial longline vessels in the Indian Ocean during the periodud1965-1975 were analysed, the results presented and discussed. The annual catch has decreasedudconsiderably since 1967, but the catch rate showed no definite tendency to increase or decrease.udDistribution of the average monthly relative density showed that seasonal concentration occurredudin the east African coast between equator and 10 0 S.; southern and western Arabian Sea, Bay ofudBengal and north-western Australian waters.