Yellowfin Tuna Fishing Dynamic During Low IOD Positive and Negative at Eastern Indian Ocean; Study Case at Western Waters of Sumatera

Feeding habit of tuna in Indian Ocean has been described around Sri Lanka, Indian Waters, Andaman Sea, western Indian Ocean (Seychelles Islands), western equatorial Indian Ocean whereas the tunas feeding habit study in Eastern Indian Oceanis merely in existence. The purpose of this study is to investigate the stomach content of three tuna species (bigeye tuna, yellowfin tuna, and skipjack tuna), apex predator in the southern part of Eastern Indian Ocean. The study was conducted in March – April, 2010 on the basis of catches of commercial tuna longline vessel based in Port of Benoa. A total of 53 individual fishes were collected, consisting of bigeye tuna (Thunnus obesus), yellowfin tuna (Thunnus albacores), and skipjack tuna (Katsuwonus pelamis). Stomach specimens were collected and analyzed.Analysis was conducted on the basis of index of preponderance method. The diet of the three tuna species showed fishes as the main diet (56–82%), followed by cephalopods (squids) as the complementary diet (0–8%), and crustaceans (shrimps) as the additional diet (2–4%). Fish prey composed of 6 families i.e. Alepisauridae, Bramidae, Carangidae, Clupeidae, Engraulidae, and Scombridae.

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Bigeye tuna fishing ground analysis using oceanographic features in Eastern Indian Ocean off Southern Java

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/429/1/012043 ◽

2020 ◽

Vol 429 ◽

pp. 012043

Author(s):

A K Dewi ◽

J L Gaol ◽

V P Siregar ◽

A S Atmadipoera

Keyword(s):

Indian Ocean ◽

Eastern Indian Ocean ◽

Fishing Ground ◽

Bigeye Tuna ◽

Tuna Fishing

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Application of remotely sensed data and maximum entropy model in detecting potential fishing zones of Yellowfin tuna (Thunnus albacares) in the eastern Indian Ocean off Sumatera

Journal of Physics Conference Series ◽

10.1088/1742-6596/1569/4/042097 ◽

2020 ◽

Vol 1569 ◽

pp. 042097

Author(s):

Achmad Fachruddin Syah ◽

Emma Suri Yanti Siregar ◽

Vincetius P Siregar ◽

Syamsul B Agus

Keyword(s):

Indian Ocean ◽

Maximum Entropy ◽

Remotely Sensed ◽

Yellowfin Tuna ◽

Eastern Indian Ocean ◽

Thunnus Albacares ◽

Maximum Entropy Model ◽

Remotely Sensed Data ◽

Entropy Model

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KOMPOSISI HASIL TANGKAPAN DAN DAERAH PENANGKAPAN PANCING ULUR TUNA DI PERAIRAN SENDANG BIRU

Jurnal Penelitian Perikanan Indonesia ◽

10.15578/jppi.25.4.2019.241-251 ◽

2019 ◽

Vol 25 (4) ◽

pp. 241

Author(s):

Maya Agustina ◽

Irwan Jatmiko ◽

Ririk Kartika Sulistyaningsih

Keyword(s):

Indian Ocean ◽

Landing Site ◽

Yellowfin Tuna ◽

Purse Seine ◽

Fishing Ground ◽

Fishing Gear ◽

Tuna Fishing ◽

The Indian Ocean ◽

High Seas

Tuna, cakalang dan tongkol (TCT) merupakan jenis hasil tangkapan ikan yang memiliki nilai ekonomis penting dan masih terdapat peluang untuk dimanfaatkan. Salah satu sentra perikanan tuna, cakalang dan tongkol di kawasan Indonesia Barat yang terbesar adalah di Kabupaten Malang tepatnya di Pelabuhan Perikanan Pantai (PPP) Pondokdadap Sendang Biru. Jenis alat penangkapan ikan yang digunakan oleh nelayan untuk menangkap tuna di perairan ini adalah pancing ulur (handline) yang dioperasikan dengan menggunakan bantuan rumpon. Tujuan penelitian ini adalah untuk mengetahui informasi sebaran daerah penangkapan (teritorial, ZEE dan laut lepas) dan bagaimana dinamika hasil tangkapannya khususnya tuna, cakalang dan tongkol. Pancing ulur mendominasi alat penangkapan ikan yang digunakan di PPP Pondokdadap, Sendang Biru tercatat sebanyak 70,42%, sedangkan pukat cincin sebanyak 9,82% dan pancing rawai sebanyak 19,76%. Jenis hasil tangkapan pancing ulur terbanyak adalah cakalang dan juwana tuna. Daerah penangkapan nelayan pancing ulur yang berbasis di PPP Pondokdadap, Sendang Biru menyebar pada kawasan perairan dengan batasan antara 8º – 12º LS dan 108º – 115º BT atau secara geografis berada di dalam perairan teritorial, ZEE dan di laut lepas. Prosentase hasil tangkapan TCT yang tertangkap pancing ulur berdasarkan wilayah perairan seperti berikut: teritorial sebanyak 0,63%, ZEE sebanyak 78,68% dan di luar ZEE (laut lepas) sebanyak 20,69%. Tuna, skipjack and little tuna are economically important and still has the potential to cathed. One of the fisheries centers tuna, skipjack and little tuna landing site in the western part of Indonesia is in Malang located at Pondokdadap Sendang Biru fishing port. The fishing gear commonly used by Sendang Biru fishermen to catch tuna in the Indian Ocean waters is handline which is operated around FADs. The purpose of this study was to find out information the distribution of fishing areas (territorial, EEZ and high seas) and how the dynamics of the catch especially tuna, skipjack and little tuna. The dominant fishing gear in PP Pondokdadap Sendang Biru is the handline with 70.42%, followed by purse seine 9.82% and longlines 19.76%. The dominant catches caught by handline were skipjack and juvenile of yellowfin tuna. Fishing ground of hand line based in PP Pondokdadap located in waters with boundaries between 8º - 12º LS and 108º - 115ºBT or geographically located in the waters territorial, EEZ and on the high seas. Tuna catches precentage caught by handline in territorial, EEZ and high seas, accounting for 0.63%, 78.68% and 20.69%, respectively.

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Relationship between the temporal-spatial distribution of fish in bigeye tuna fishing grounds and the thermocline characteristics in the tropical Indian Ocean

Journal of Fishery Sciences of China ◽

10.3724/sp.j.1118.2012.00679 ◽

2013 ◽

Vol 19 (4) ◽

pp. 679-689 ◽

Cited By ~ 2

Author(s):

Shenglong YANG ◽

Yu ZHANG ◽

Wei FAN ◽

Yang DAI

Keyword(s):

Spatial Distribution ◽

Indian Ocean ◽

Tropical Indian Ocean ◽

Bigeye Tuna ◽

Tuna Fishing ◽

Distribution Of Fish

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Impact of the Strong Downwelling (Upwelling) on Small Pelagic Fish Production during the 2016 (2019) Negative (Positive) Indian Ocean Dipole Events in the Eastern Indian Ocean off Java

Climate ◽

10.3390/cli9020029 ◽

2021 ◽

Vol 9 (2) ◽

pp. 29

Author(s):

Jonson Lumban-Gaol ◽

Eko Siswanto ◽

Kedarnath Mahapatra ◽

Nyoman Metta Nyanakumara Natih ◽

I Wayan Nurjaya ◽

...

Keyword(s):

Indian Ocean ◽

Indian Ocean Dipole ◽

Pelagic Fish ◽

Eastern Indian Ocean ◽

Fish Production ◽

Small Pelagic Fish ◽

Field Surveys ◽

Chl A ◽

Positive Indian Ocean Dipole ◽

The Impact

Although researchers have investigated the impact of Indian Ocean Dipole (IOD) phases on human lives, only a few have examined such impacts on fisheries. In this study, we analyzed the influence of negative (positive) IOD phases on chlorophyll a (Chl-a) concentrations as an indicator of phytoplankton biomass and small pelagic fish production in the eastern Indian Ocean (EIO) off Java. We also conducted field surveys in the EIO off Palabuhanratu Bay at the peak (October) and the end (December) of the 2019 positive IOD phase. Our findings show that the Chl-a concentration had a strong and robust association with the 2016 (2019) negative (positive) IOD phases. The negative (positive) anomalous Chl-a concentration in the EIO off Java associated with the negative (positive) IOD phase induced strong downwelling (upwelling), leading to the preponderant decrease (increase) in small pelagic fish production in the EIO off Java.

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