Performance of rumpon-based tuna fishery in the Fishing Port of Sendangbiru, Malang, Indonesia

Performance of rumpon-based tuna fishery in the Fishing Port of Sendangbiru, Malang, Indonesia
D G R Wiadnya1 *, A Damora2 , M M Tamanyira2 , D Nugroho3 and A Darmawan4
1 Department of Fisheries, Faculty of Fisheries and Marine Science, University of Brawijaya, Jl. Veteran 65145 Malang, Indonesia
2Coral Triangle Program Directorate, WWF-Indonesia, Graha Simatupang, Tower 2 Unit C 7th Floor, Jl. Letjen T.B. Simatupang Kav 38 Jakarta 12540, Indonesia
3 Research Center of Fisheries, Ministry of Marine Affairs and Fisheries, Balitbang KP II Building, 2nd Floor Jl. Pasir Putih II, Ancol Timur, Jakarta 14430, Indonesia
4 Department of Aquatic Resource Management, Faculty of Fisheries and Marine Science, University of Brawijaya Malang, Indonesia
*Email : [email protected]

Abstract.
Catch records on FADs-based tuna fishery (hand-line) in the southern of East Java was conducted in fishing base of Sendangbiru, from February 2016 to May 2017. Total 45 rumpon (FADs) were found within space area of 64,081 square nautical miles, with average between FADs distant of 25 nautical miles. All FADs were located outside Fisheries Management Areas, except one FAD of code 31. Hand-line fishery was designed for a maximum fishing trip of 14 days. Total catch biomass mainly determined fishing trip. When catch exceeded 1,000 kg, fishermen tend to turn back although with < 10 days fishing trip. Yellowfin tuna and skipjacks were two main species that formed total catch with average catch biomass varied amongst 425–1,360 kg trip-1 . Apart from baby-tuna, yellowfin tuna and albacore within catch were at size class higher than its first maturity stage. However, length-class of skipjack indicated that it still in immature stage. Despite of FAD license, Ministry of Marine Affairs and Fisheries neither informed nor aware the position of these FADs.

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