Characteristic of eddies kinetic energy associated with yellowfin tuna in southern Java Indian Ocean

2nd International Conference on Marine Science: Better Insight for the Healthy Ocean

Tussadiah, A.^1 ; Pranowo, W.S.^1,2 ; Syamsuddin, M.L.^3 ; Riyantini, I.^3 ; Nugraha, B.^4 ; Novianto, D.^5

Marine and Coastal Data Laboratory, Marine Research Center, Agency of Research and Human Resources, Ministry of Marine Affairs and Fisheries, Indonesia^1

Department of Hydrography Engineering, Indonesian Naval Postgraduate School (STTAL, Indonesia^2

Padjadjaran University, Department of Marine Science, Fisheries and Marine Science Faculty, Padjadjaran University, Indonesia^3

Fisheries Research Center, Ministry of Marine Affairs and Fisheries, Indonesia^4

Tuna Fisheries Research Institute, Ministry of Marine Affairs and Fisheries, Indonesia^5

关键词: Circular current;    Cyclonic eddy;    Down-welling;    Indonesian throughflow;    Seasonal cycle;    South equatorial currents;    Southeast monsoon;    Surface layers;   

Others  :  https://iopscience.iop.org/article/10.1088/1755-1315/176/1/012004/pdf
DOI  :  10.1088/1755-1315/176/1/012004

来源: IOP

【 摘 要 】

Eddies kinetic energy (EKE) is one of the most indicators in observed the phenomena of upwelling and down welling generated by circular current or eddies. This research aims are to determine the characteristics and intensity of eddies and EKE and its relation to the distribution of yellowfin tuna (Thunnus albacares) in Southern Java Indian Ocean. Based on Automated Eddies Detection (AED) method, it is succesfully discovered many eddies well formed in Southern Java Indian Ocean through 2014. Furthermore, EKE has a vary values to the depth, which tends to be higher at the surface layer than at thermocline layer. EKE in this region display a distinct seasonal cycle with maximum occurred in Southeast Monsoon and minimum in Northwest Monsoon. Increasing of EKE in Southeast Monsoon tend to be affected by currents system of Indonesian Throughflow (ITF) and South Equatorial Current (SEC). The highest of yellowfin tuna catches found in June 2014 and occurred in the current system with high EKE intensity. Correlation between eddies and yellowfin tuna found at thermocline layer (109 m) and occurred in cyclonic eddies (R2 = 0.59).