SIZE AND FISHING GROUND OFWAHOO (Acanthocybium solandri Cuvier, 1832) FROM CATCH DATA OF TUNA LONGLINE OPERATED IN INDIAN OCEAN
Abstract: Wahoo (Acanthocybium
solandri Cuvier, 1832) is a member of the Scombrid family, is a pelagic (open
ocean) species found worldwide in tropical and warm-temperate seas. It is
fished throughout its range by artisanal, recreational, and commercial. Wahoo
is one of the by-product species of the tuna long line fleets operate in Indian
Ocean. This paper describes status of wahoo resource caught by tuna long line
in Indian Ocean based at Benoa-Bali. Data obtained from onboard observer
program on the tuna long liner based at Benoa-Bali during 2005-2010. Total of
85 trips of onboard observation were carried out with the total long line sets
(one set per day) were 2873 times. The data covered the horizontal and vertical
position of tuna long line hooks caught the wahoo, hook rate and fish size
distribution. Data of horizontal fishing positions (coordinates) gained from
the global positioning system availabled in the tuna long liners. The depth of
the long line gear in the waters and teperature of waters were measured by mini-loggers
TDR type SP2T-1200, brand: NKE Micrel. Hook rate of wahoo is calculated using
the Klawe (1986) method. Result of research showed that the wahoos caught by
tuna long lines based at Benoa spread horizontally between 1o31’-33o 40’S and
77o18’-117o53’E and spread vertically between the depth of 75.2- 285.7 m. From
85 tuna long line fishing trips, only about 50% of 85 tuna long line fishing
trips caught wahoo with hook rate ranged 0.947-1.399 per 1000 hooks/setting.
Size distribution of wahoo ranged 70-180cm with modus ranged 101-110cm.
Keywords: Wahoo; tuna long
line; Indian Ocean
Author: Agustinus Anung
Widodo, Fayakun Satria, Budi Nugraha
Journal Code: jpperikanangg120054
