KOMPOSISI HASIL TANGKAPAN DAN DAERAH PENANGKAPAN HIU BOTOL (Centrophoridae) YANG DIDARATKAN  DI TENAU, NUSA TENGARA TIMUR

Hiu botol merupakan jenis ikan hiu yang bernilai ekonomis tinggi, karena dapat menghasilkan minyak ikan dari ekstrak hati dinamakan squalen. Pada umumnya, hiu botol hidup di perairan Samudera Hindia pada kedalaman lebih dari 100 meter, namun sampai saat ini penyebarannya belum banyak diketahui. Selain itu, informasi terkait komposisi jenisnya masih sangat terbatas. Tulisan ini bertujuan mengkaji komposisi hiu botol yang tertangkap rawai dasar dan daerah penangkapannya di perairan Samudera Hindia yang berbasis di Kupang, Nusa Tenggara Timur. Data diperoleh dari survei lapangan dan wawancara dengan nelayan penangkap hiu di daerah Tenau, periode bulan Januari-Desember 2016. Hasil kajian menunjukkan bahwa hiu botol yang menjadi target penangkapan terdiri atas tiga jenis yaitu; Centrophorus squamosus (10-13%), Centrophorus granulosus (15-20%), dan Centroscymnus coelolepis (sekitar 40%). Prosentase hiu botol yang di Samudera Hindia berkisar 0,01-0,04 % dari total tangkapan yang didaratkan di Pelabuhan Perikanan Pantai Tenau. Sedangkan, prosentase hiu botol periode tahun 2011-2014 relatif besar dibandingkan dengan hasil tangkapan jenis hiu lainnya. Namun, pada periode 2012-2014 hasil tangkapan hiu botol cukup fluktuatif dan cenderung menurun. Hal ini mengindikasikan bahwa populasi sumber daya jenis hiu ini telah terjadi penurunan. Hasil tangkapan hiu botol tertinggi terjadi pada bulan Januari-Februari dan Agustus-September, yang tertangkap di wilayah perairan Selatan Pulau Rote, Timor dan Sabu. Daerah penangkapan potensial hiu botol berada pada koordinat 1240-1280 BT dan 100-110 LS pada kedalaman antara 200-800 meter. A dogfish shark has a high economic value, especially its liver oil, namely squalen. In general, a dogfish sharks live in the waters of the Indian Ocean at a depth of over 100 meters, but its distribution and composition has not been well documented. This paper aims to describe the composition of sharks caught by bottom longlines operated in the Indian Ocean landed at Kupang, East Nusa Tenggara. Data obtained from field surveys and interviews with shark fishermen from Tenau in January-December 2016. The results showed that the dogfish shark consisted of three species: Centrophorus granulosus, Centrophorus squamosus and Centroscymnus coelolepis. The percentage of dogfish sharks in the Indian Ocean ranged from 0.01 to 0.04% of the total catch landed at Tenau. While the percentage of dogfish shark in period 2011 - 2014 was relatively large compared to the catch of other species of sharks. However, in period 2012 - 2014 dogfih shark catches fluctuated and tended to decrease. This indicates that the population decline of this species. The highest catches of dogfish shark occurred in January-February. During August-September sharks were caught in the territorial waters of the South Island of Rote, Timor and Sabu. Potentially fishing areas of dogfish shark would be located at 124o-128o E and 10o-11o S with depths between 200-800 meters.

Download Full-text

The invaders: Phylogeography of dengue and chikungunya viruses Aedes vectors, on the South West islands of the Indian Ocean

Infection Genetics and Evolution ◽

10.1016/j.meegid.2011.07.016 ◽

2011 ◽

Vol 11 (7) ◽

pp. 1769-1781 ◽

Cited By ~ 49

Author(s):

H. Delatte ◽

L. Bagny ◽

C. Brengue ◽

A. Bouetard ◽

C. Paupy ◽

...

Keyword(s):

Indian Ocean ◽

The South ◽

South West ◽

The Indian Ocean

Download Full-text

The Geology of Portuguese Nyasaland

Geological Magazine ◽

10.1017/s0016756800109501 ◽

1922 ◽

Vol 59 (5) ◽

pp. 200-212

Author(s):

Robert R. Walls

Keyword(s):

Indian Ocean ◽

East Africa ◽

The South ◽

The North ◽

Dark Continent ◽

The Indian Ocean

Portuguese Nyasaland is the name given to the most northern part of Portuguese East Africa, lying between Lake Nyasa and the Indian Ocean. It is separated from the Tanganyika territory in the north by the River Rovuma and from the Portuguese province of Mozambique in the south by the River Lurio. The territory measures about 400 miles from east to west and 200 miles from north to south and has an area of nearly 90,000 square miles. This territory is now perhaps the least known part of the once Dark Continent, but while the writer was actually engaged in the exploration of this country in 1920–1, the Naval Intelligence Division of the British Admiralty published two handbooks, the Manual of Portuguese East Africa and the Handbook of Portuguese Nyasaland, which with their extensive bibliographies contained practically everything that was known of that country up to that date (1920). These handbooks make it unnecessary in this paper to give detailed accounts of the work of previous explorers.

Download Full-text

Art. VII.—Notes on Persian Belúchistán. From the Persian of Mirza Mehdy Khán. Published Teheran, July, 1875

Journal of the Royal Asiatic Society ◽

10.1017/s0035869x00016816 ◽

1876 ◽

Vol 9 (1) ◽

pp. 147-154

Author(s):

A. H. Schindler

Keyword(s):

Indian Ocean ◽

Temperate Climate ◽

The South ◽

The West ◽

The North ◽

The People ◽

The Indian Ocean ◽

The Hill ◽

Cool Climate

The part of Belúchistán now under Persian rule is bounded upon the north by Seistán, upon the east by Panjgúr and Kej, upon the south by the Indian Ocean, and upon the west by Núrámshír, Rúdbár, and the Báshákerd mountains.This country enjoys a variety of climates; almost unbearable heat exists on the Mekrán coast, we find a temperate climate on the hill slopes and on the slightly raised plains as at Duzek and Bampúr, and a cool climate in the mountainous districts Serhad and Bazmán. The heat at Jálq is said to be so intense in summer that the gazelles lie down exhausted in the plains, and let themselves be taken by the people without any trouble.

Download Full-text

TSUNAMI HAZARD AND CASUALTY ESTIMATION IN A COASTAL AREA THAT NEIGHBORS THE INDIAN OCEAN AND SOUTH CHINA SEA

Journal of Earthquake and Tsunami ◽

10.1142/s1793431112500108 ◽

2012 ◽

Vol 06 (02) ◽

pp. 1250010 ◽

Cited By ~ 20

Author(s):

ANAWAT SUPPASRI ◽

FUMIHIKO IMAMURA ◽

SHUNICHI KOSHIMURA

Keyword(s):

Indian Ocean ◽

South China Sea ◽

South China ◽

The South China Sea ◽

The South ◽

Worst Case ◽

China Sea ◽

Coastal Population ◽

The Indian Ocean ◽

Hazard Level

In the Indian Ocean and the South China Sea, many hundreds of thousands of lives have been lost due to tsunami events, and almost half of the lives lost occurred following the 2004 Indian Ocean event. Potential tsunami case scenarios have been simulated in these regions by a number of researchers to calculate the hazard level. The hazard level is based on a variety of conditions, such as the tsunami height, the inundation area, and the arrival time. However, the current assessments of the hazard levels do not focus on the tsunami risk to a coastal population. This study proposes a new method to quantify the risk to the coastal population in the region that includes the Indian Ocean and the South China Sea. The method is simple and combines the use of readily available tsunami data, far-field tsunami simulation models to determine the regional risk and global population data. An earthquake-generated tsunami was simulated, following an earthquake that had a magnitude larger than 8.5 Mw and occurred along a potential subduction zone. The 2004 Indian Ocean event seemed to be a "worst case scenario"; however, it has been estimated that a potential tsunami, occurring in a coastal region with a high population density, could cause significantly greater casualties.

Download Full-text

Interannual Variability in Sea Surface Height at Southern Midlatitudes of the Indian Ocean

Journal of Physical Oceanography ◽

10.1175/jpo-d-20-0279.1 ◽

2021 ◽

Vol 51 (5) ◽

pp. 1595-1609

Author(s):

Motoki Nagura ◽

Michael J. McPhaden

Keyword(s):

Indian Ocean ◽

Interannual Variability ◽

Sea Surface Height ◽

Wind Forcing ◽

Sea Surface ◽

The South ◽

South Indian Ocean ◽

Eastern Boundary ◽

South Indian ◽

The Indian Ocean

AbstractThis study examines interannual variability in sea surface height (SSH) at southern midlatitudes of the Indian Ocean (10°–35°S). Our focus is on the relative role of local wind forcing and remote forcing from the equatorial Pacific Ocean. We use satellite altimetry measurements, an atmospheric reanalysis, and a one-dimensional wave model tuned to simulate observed SSH anomalies. The model solution is decomposed into the part driven by local winds and that driven by SSH variability radiated from the western coast of Australia. Results show that variability radiated from the Australian coast is larger in amplitude than variability driven by local winds in the central and eastern parts of the south Indian Ocean at midlatitudes (between 19° and 33°S), whereas the influence from eastern boundary forcing is confined to the eastern basin at lower latitudes (10° and 17°S). The relative importance of eastern boundary forcing at midlatitudes is due to the weakness of wind stress curl anomalies in the interior of the south Indian Ocean. Our analysis further suggests that SSH variability along the west coast of Australia originates from remote wind forcing in the tropical Pacific, as is pointed out by previous studies. The zonal gradient of SSH between the western and eastern parts of the south Indian Ocean is also mostly controlled by variability radiated from the Australian coast, indicating that interannual variability in meridional geostrophic transport is driven principally by Pacific winds.

Download Full-text

Mauritius

Enforcement of Intellectual Property Rights in Africa ◽

10.1093/oso/9780198837336.003.0037 ◽

2020 ◽

Author(s):

Marius Schneider ◽

Vanessa Ferguson

Keyword(s):

Indian Ocean ◽

Eastern Coast ◽

Official Language ◽

The South ◽

South Eastern ◽

The Indian Ocean ◽

The Republic ◽

Local Languages

Situated off the south-eastern coast of Africa in the Indian Ocean, the Republic of Mauritius is an island nation of 2,040 square kilometres (km) with a population of 1.26 million. English is generally accepted as the official language as it is used by the administration and the courts. French is also widely spoken among the population, and most inhabitants are bilingual. Local languages include Créole and Bhojpuri. The working week on the island is from Monday to Friday and the Mauritian rupee (MUR) is the currency used.

Download Full-text

Spatial Pattern of Tourist Distribution based on Physical and Accessibility Factors in Pacitan Regency, East Java, Indonesia

E3S Web of Conferences ◽

10.1051/e3sconf/20187303007 ◽

2018 ◽

Vol 73 ◽

pp. 03007

Author(s):

Osiana Karita Putri ◽

M H Dewi Susilowati

Keyword(s):

Indian Ocean ◽

Spatial Pattern ◽

Road Network ◽

Physical Factor ◽

The South ◽

City Center ◽

Significant Relation ◽

Flat Terrain ◽

The Indian Ocean ◽

Local Road

Pacitan Regency has the potential natural tourism because in the south is adjecent to the Indian Ocean and that region has many caves. The number of tourists visit in Pacitan Regency has recently increased, especially in 2017 is the highest number of tourists visit. Spatial pattern of tourist distribution can be analyzed based on terrain, type of network and the distance from city center. The purpose of this study is analyzing spatial pattern of tourist distribution based on physical factor (terrain) and accessibility factors (type of road network and the distance from city center) then the factors that have significant relation. The data are collected by observation, interview, plotting, and documentation. The method used in this research was descriptive and statistics. The tourists distribution in this research are total of tourist arrivals 2017 in tourism object that registered by the department of tourism, youth, and sport of Pacitan Regency. The result shows the highest tourist distribution is on Teleng Ria Beach and Klayar Beach. Teleng Ria Beach is on flat terrain, located on local road and near from city center of Pacitan Regency. Klayar Beach is on undulating terrain, located on other road and moderate from city center of Pacitan Regency. The highest tourist distribution in Teleng Ria Beach and Klayar Beach are reinforced with the most complete primary, secondary and conditional facilities among other tourism objects in Pacitan Regency. Statistics show significant relation between tourist distribution and physical factor (terrain).

Download Full-text