scholarly journals COMPARISON OF INDONESIAN TUNA LONGLINE FISHING PERFORMANCE WITHIN AND OUTSIDE INDONESIA EXCLUSIVE ECONOMIC ZONE (EEZ)

2017 ◽  
Vol 23 (1) ◽  
pp. 1
Author(s):  
Bram Setyadji ◽  
Irwan Jatmiko
Keyword(s):  
Indian Ocean ◽  
Bluefin Tuna ◽  
T Test ◽  
Exclusive Economic Zone ◽  
Southern Bluefin Tuna ◽  
The Indian Ocean ◽  
The Mean ◽  
Economic Zone ◽  
Tuna Longline ◽  
High Seas

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).

scholarly journals Mapping ocean-state Mauritius and its unlaid ghosts: Hydropolitics and literature in the Indian Ocean

2020 ◽  
Vol 32 (1-2) ◽  
pp. 117-131
Author(s):  
Kumari Issur
Keyword(s):  
Indian Ocean ◽  
United Nations ◽  
Exclusive Economic Zone ◽  
Law Of The Sea ◽  
The Indian Ocean ◽  
United Nations Convention ◽  
Economic Zone ◽  
The United Nations ◽  
The Law ◽  
The Republic

In the wake of what has been termed “the scramble for the oceans,” the Republic of Mauritius lodged an application in 2012 with the United Nations Convention on the Law of the Sea (UNCLOS) to recognize its rights to an Exclusive Economic Zone that comprises a large expanse of the Indian Ocean, and subsequently redefined itself as an ocean-state. This new configuration raises as many issues as it answers. The Indian Ocean remains firmly central both to Mauritian history and to its imaginary. All at once, the endless fluidity of the ocean renders material traces and academic archeology harder, yet somehow it traps and sediments memory and meaning in some ways more profoundly than land. This article bores and drills into the historical, geopolitical, and ontological depths of ocean-state Mauritius with the figure of the ghost as motif, metaphor, and witness.

scholarly journals KOMPOSISI UKURAN, PERBANDINGAN JENIS KELAMIN, DAN TINGKAT KEMATANGAN GONAD IKAN TODAK BERPARUH PENDEK (Tetrapturus angustirostris) DI SAMUDERAHINDIA

2017 ◽  
Vol 3 (2) ◽  
pp. 123
Author(s):  
Dian Novianto ◽  
Budi Nugraha ◽  
Andi Bahtiar
Keyword(s):  
Indian Ocean ◽  
Sex Ratio ◽  
Size Composition ◽  
Maturity Stage ◽  
Chi Square ◽  
Male And Female ◽  
Level Ii ◽  
Chi Square Test ◽  
The Indian Ocean ◽  
Tuna Longline

Ikan todak berparuh pendek atau ikan tumbuk atau shortbill spearfish (Tetrapturus angustirostris) merupakan salah satu hasil tangkapan sampingan rawai tuna. Informasi mengenai ikan todak berparuh pendek seperti komposisi ukuran, perbandingan kelamin, dan tingkat kematangan gonadsangat terbatas. Tulisan ini bertujuan untuk menyajikan data dan informasi mengenai aspek biologi ikan todak berparuh pendek yang merupakan hasil tangkapan sampingan dari rawai tuna yang beroperasi di Samudera Hindia. Penelitian ini dilakukan pada bulan September sampai Desember 2008 di perairan Samudera Hindia. Hasil penelitian menunjukan bahwa ikan todak berparuh pendek memiliki kisaran panjang tubuh 135-175 cmLJFL dan modus pada kisaran 155-165 cmLJFL.Perbandingan jenis kelamin ikan jantan dan betina 1:13,5, berdasarkan atas hasil uji chi-square menunjukan bahwa rasio ikan jantan dan betina pada periode penelitian ini tidak seimbang. Pada bulan September ikan todak berparuh pendek betina didominansi oleh tingkat kematangan gonad IIsebesar 66,7%, bulan Oktober oleh tingkat kematangan gonad V sebesar 46,2%, bulan Nopember oleh tingkat kematangan gonad II sebesar 53,3%, sedangkan pada bulan Desember oleh tingkat kematangan gonad III sebesar 42,9%. Pada bulan Nopember sampai Desember terlihat bahwa tingkat kematangan gonad V mulai berkurang, hal ini menunjukan bahwa pada bulan Nopember sampai Desember diduga banyak ikan todak berparuh pendek betina yang sudah memijah. Shortbill Spearfish (Tetrapturus angustirostris) is one of bycatch of tuna longline. Information about shortbill spearfish on the size composition, sex ratio, and maturity stage is still very limited. The objective this paper is to present the data and information about shortbill spearfish which is a bycatch of tuna longline that operated in the Indian Ocean. Research was conducted during September until December 2008 in Indian Ocean. The results showed that the shortbill spearfish have body length about 135-175 cmLJFL and modes in 155-165 cmLJFL. Sex ratio of the male and female was 1:13.5. Based on chi-square test showed that the ratio of male and female in the period of the study was not balanced. In September, the female stage maturity was dominated by level II of 66.7%, October by level V of 46.2%, November by level II of 53.3%, and December by level III of 42.9%. During November until December showed that the maturity stage of level V was decreased, this shows that in this time the female of shortbill spearfish was spawned.

8. The law of the sea

2021 ◽  
pp. 104-116
Author(s):  
Ilias Bantekas ◽  
Efthymios Papastavridis
Keyword(s):  
The Other ◽  
Exclusive Economic Zone ◽  
Law Of The Sea ◽  
Economic Zone ◽  
The Law ◽  
The One ◽  
High Seas

The law of the sea governs the relations of States in respect of the uses of the seas. It allocates competences between, on the one hand, coastal States wishing to extend their jurisdictional reach as far as possible and the flag States, on the other, wishing to have the seas open for vessels to navigate and for other uses. The chapter discusses the laws applicable to each maritime zone; namely, internal waters, the territorial sea, the contiguous zone, the exclusive economic zone, the high seas, and the seabed. It also sets out the rules of maritime delimitation between States with opposite or adjacent coastlines.

8. Law of the sea

2019 ◽  
pp. 99-112
Author(s):  
Ilias Bantekas ◽  
Efthymios Papastavridis
Keyword(s):  
The Other ◽  
Exclusive Economic Zone ◽  
Law Of The Sea ◽  
Economic Zone ◽  
The Law ◽  
The One ◽  
High Seas

The law of the sea governs the relations of States in respect of the uses of the seas. It allocates competences between, on the one hand, coastal States wishing to extend their jurisdictional reach as far as possible and the flag States, on the other, wishing to have the seas open for vessels to navigate and for other uses. The chapter discusses the laws applicable to each maritime zone, namely internal waters, the territorial sea, the contiguous zone, the Exclusive Economic Zone, the high seas, and the seabed. It also sets out the rules of maritime delimitation between States with opposite or adjacent coastlines.

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