On the Cause of Annual Variation of Catch of Yellowfin Tuan in the Tropical Western Indian Ocean-III
Realtion between Annual Variation of Hook Rate and Age Group
1967 Volume 33 Issue 3 Pages 151-155
Details
1967 Volume 33 Issue 3 Pages 151-155
On the basis of the weight frequency distribution, the authors estimated the age composition of yellowfin tuna which were caught in the tropical western Indian Ocean during the period from 1958 through 1964 and also examined the relation between age composition and hook rate (number of fish caught per 100 hooks). The results obtained are summarized as follows.
The high hook rate seemed to be brought by the occurrence of dominant year class and or by the appearance of the simultaneous appearance of two or more age groups in the fishing ground.
