COMPARISON OF INDONESIAN TUNA LONGLINE FISHING PERFORMANCE WITHIN AND OUTSIDE INDONESIA EXCLUSIVE ECONOMIC ZONE (EEZ)
Abstract: Indonesian tuna
longline fleets have been fishing in the Exclusive Economic Zone (EEZ) and high
seas of the Indian Ocean for quite some time. However, effort has never been
made to separate catch from the EEZ and the high seas as it important for
fisheries management. A total of 2,430 set-by-set longline fishing data had
been collected by scientific observers based in the Research Institute of Tuna
Fishery in Bali since August 2005 to December 2014 on which present analysis
was made. The research aims to compare between trend of tuna catch of the EEZ
and of the high seas of Indian Ocean. The results show that the mean hook rate
of both catches of big eye tuna (BET) and southern Bluefin tuna (SBT) caught in
the high seas was significantly higher than that the EEZ (two sample t-test,
p<0.05), while for yellow fin tuna (YFT) it was in the opposite direction
(two sample t-test, p<0.05). As for albacore (ALB), the mean hook rate value
was statistically similar in both fishing grounds (two sample t-test,
p>0.05).
Keywords: Tuna; longline;
Exclusive Economic Zones; hook rate
Author: Bram Setyadji, Irwan
Jatmiko
Journal Code: jpperikanangg170010
