scholarly journals SIZE AND FISHING GROUND OFWAHOO (Acanthocybium solandri Cuvier, 1832) FROM CATCH DATA OF TUNA LONGLINE OPERATED IN INDIAN OCEAN

2012 ◽  
Vol 18 (2) ◽  
pp. 101
Author(s):  
Agustinus Anung Widodo ◽  
Fayakun Satria ◽  
Budi Nugraha
Keyword(s):  
Indian Ocean ◽  
Size Distribution ◽  
Global Positioning System ◽  
Fishing Ground ◽  
Vertical Position ◽  
Distribution Data ◽  
Long Line ◽  
Global Positioning ◽  
Product Species ◽  
Warm Temperate

Wahoo (<em>Acanthocybium solandri</em> Cuvier, 1832) is a member of the Scombrid family, is a pelagic (open ocean) species found worldwide in tropical and warm-temperate seas. It is fished throughout its range by artisanal, recreational, and commercial. Wahoo is one of the by-product species of the tuna long line fleets operate in Indian Ocean. This paper describes status of wahoo resource caught by tuna long line in Indian Ocean based at Benoa-Bali. Data obtained from onboard observer program on the tuna long liner based at Benoa-Bali during 2005-2010. Total of 85 trips of onboard observation were carried out with the total long line sets (one set per day) were 2873 times. The data covered the horizontal and vertical position of tuna long line hooks caught the wahoo, hook rate and fish size distribution. Data of horizontal fishing positions (coordinates) gained from the global positioning system availabled in the tuna long liners. The depth of the long line gear in the waters and teperature of waters were measured by mini-loggers TDR type SP2T-1200, brand: NKE Micrel. Hook rate of wahoo is calculated using the Klawe (1986) method. Result of research showed that the wahoos caught by tuna long lines based at Benoa spread horizontally between 1o31’-33o 40’S and 77o18’-117o53’E and spread vertically between the depth of 75.2- 285.7 m. From 85 tuna long line fishing trips, only about 50% of 85 tuna long line fishing trips caught wahoo with hook rate ranged 0.947-1.399 per 1000 hooks/setting. Size distribution of wahoo ranged 70-180cm with modus ranged 101-110cm.

scholarly journals Integrating Field and GIS-based Surveys to Map the Distribution and Characterize the Ecological Habitat for Conservation Management of Georgia Plume, a Rare Endemic

HortScience ◽  
2013 ◽  
Vol 48 (2) ◽  
pp. 158-163
Author(s):  
Justin A. Porter ◽  
David Berle ◽  
Hazel Y. Wetzstein
Keyword(s):  
Global Positioning System ◽  
Census Data ◽  
Plant Conservation ◽  
Rare Plants ◽  
Aerial Photographs ◽  
Conservation Strategies ◽  
Distribution Data ◽  
Global Positioning ◽  
Ecological Habitat ◽  
Rare Endemic

Accurate mapping, inventory assessment, and habitat descriptions are critically important for the development of plant conservation strategies of rare plants. Georgia plume, Elliottia racemosa (Ericaceae), is a rare threatened plant endemic only to the state of Georgia. In this study, census and distribution data were collected and the ecological habitat characterized for all known populations of georgia plume using geographic information system/global positioning system (GIS/GPS)-based methods. Causes for population losses and decline were assessed by evaluating both extant populations and historically reported but currently inactive sites. Landowner permission was obtained to visit 56% (32 of 57) of all known recorded populations. Over 40% of visited locations no longer contained georgia plume; 58% of inactive sites were associated with anthropogenic disturbances including farming and timber. Populations not visited by ground were evaluated using aerial photographs: of 29 putative populations, 66% were judged highly unlikely to contain georgia plume based on current land use. Census data verified that many populations have few individuals: 75% contained less than 45 individuals; over one-third contained 12 or fewer individuals. Over 80% of extant populations had an area of less than 0.3 ha. Field and aerial assessments of recent and historically noted populations confirm that georgia plume has disappeared from many previously reported locations and that fewer than two dozen populations may remain.

scholarly journals CATCH ESTIMATION AND SIZE DISTRIBUTION OF BILLFISHES LANDED IN PORT OF BENOA, BALI

2012 ◽  
Vol 18 (1) ◽  
pp. 35 ◽  
Author(s):  
Bram Setyadji ◽  
Jumariadi Jumariadi ◽  
Budi Nugraha
Keyword(s):  
Indian Ocean ◽  
Size Distribution ◽  
Sexual Maturity ◽  
Economic Value ◽  
Daily Observation ◽  
Istiophorus Platypterus ◽  
Long Line ◽  
Processing Plants ◽  
The Individual ◽  
Individual Size

Billfishes are generally considered as by-product in tuna long line fisheries that have high economic value in the market. By far, the information about Indian Ocean billfish biology and fisheries especially in Indonesia is very limited. This research aimed to elucidate the estimation of production and size distribution of billfishes landed in port of Benoa during 2010 (February – December) through daily observation at the processing plants. The result showed that the landings dominated by Swordfish (<em>Xiphias gladius</em>) 54.9%, Blue marlin (<em>Makaira mazara</em>) 17.8% and Black marlin (<em>Makaira indica</em>) 13.0% respectively, followed by small amount of striped marlin (<em>Tetrapturus audax</em>), sailfish (<em>Istiophorus platypterus</em>), and shortbil spearfish (<em>Tetrapturus Angustirostris</em>). Generally the individual size of billfishes range between 68 and 206 cm (PFL), and showing negative allometric pattern except on swordfish that was isometric. Most of the billfish landed haven’t reached their first sexual maturity.

Maldives Field Survey after the December 2004 Indian Ocean Tsunami

2006 ◽  
Vol 22 (3_suppl) ◽  
pp. 137-154 ◽  
Author(s):  
Hermann M. Fritz ◽  
Costas E. Synolakis ◽  
Brian G. McAdoo
Keyword(s):  
Sri Lanka ◽  
Indian Ocean ◽  
Global Positioning System ◽  
Field Survey ◽  
Indian Ocean Tsunami ◽  
Positioning System ◽  
2004 Indian Ocean Tsunami ◽  
Global Positioning ◽  
The Impact

The tsunami of 26 December 2004 severely affected the Maldives at a distance of 2,500 km from the epicenter of the magnitude 9.0 earthquake. The Maldives provide an opportunity to assess the impact of a tsunami on coral atolls. Two international tsunami survey teams (ITSTs) surveyed a total of 13 heavily damaged islands. The islands were visited by seaplane on 14–15 and 18–19 January 2005. We recorded tsunami heights of up to 4 m on Vilufushi on the basis of the location of debris in trees and watermarks on buildings. Each watermark was localized by means of a global positioning system (GPS) and was photographed. Numerous eyewitness interviews were recorded on video. The significantly lower tsunami impact on the Maldives as compared with Sri Lanka is largely due to the topography and bathymetry of the atoll chain.

scholarly journals Mahonia oiwakensis Hayata (=Mahonia lomariifolia) (Berberidaceae): A new species for the alien flora of South Africa

Bothalia ◽  
2018 ◽  
Vol 48 (1) ◽  
Author(s):  
Thulisile P. Jaca ◽  
Mbali A. Mkhize
Keyword(s):  
South Africa ◽  
Global Positioning System ◽  
Nature Reserve ◽  
First Record ◽  
Distribution Data ◽  
Type Specimens ◽  
Alien Flora ◽  
Global Positioning ◽  
Two Populations ◽  
A New Species

Background: A first record of a naturalised population of Mahonia oiwakensis (=Mahonia lomariifolia) in South Africa is presented. The species is native to China and is cultivated in South Africa as an ornamental plant.Objectives: To document a new record of M. oiwakensis, provide a brief description of its morphology and note its ecology and current distribution outside of cultivation in South Africa.Method: Plants were studied in the field and herbarium vouchers were collected and compared with images of type specimens. Distribution data were collected by means of global positioning system coordinates for each plant, and vegetation and habitat types were recorded for the sites where M. oiwakensis was collected.Results: Two populations of 16 plants were found in South Africa, Gauteng, Pretoria, in the Faerie Glen Nature Reserve and Moreleta Kloof Nature Reserve, in the natural savannah biome, in thornveld and bushveld vegetation.Conclusions: Mahonia oiwakensis has naturalised in South Africa. Further research is paramount to determine whether the species poses a substantial threat and whether it should be regulated and prioritised for management. It is recommended that this species should be added to the species under surveillance for potential eradication or containment targeting.

scholarly journals Comparative Study of Positional Accuracies Using Three GPS Receivers

2020 ◽  
Vol 24 (3) ◽  
pp. 443-448
Author(s):  
O.J. Nnamani ◽  
V.A. Ijaware
Keyword(s):  
Global Positioning System ◽  
Vertical Position ◽  
Accurate Information ◽  
Positioning System ◽  
Gps Receiver ◽  
Gps Receivers ◽  
University Of Technology ◽  
Significant Difference ◽  
Global Positioning ◽  
The One

The emergence of the Global Positioning System (GPS) receiver over the years has afforded the avenue to acquire data from various geospatial locations. This paper analyses and compares the accuracy of point positions collected using three Global Positioning System (GPS) receivers— South H66/H88, Sokkia radian IS, and ProMark 3. A field study was conducted on 5 control points within the Federal University of Technology Akure (FUTA) Campus. The One-way ANOVA test performed for the coordinates obtained from the three GPS receivers at an alpha level of 0.05 using SPSS version 16 reveals no statistically significant difference between the coordinates. Analysis of the result shows that South GPS, Sokkia GPS, and ProMark GPS receivers had horizontal misclosure values of 0.1337, 0.1625 and 0.2425 respectively, making South GPS best in obtaining accurate information onhorizontal positions. For the vertical position, misclosure values of 0.0902, 0.2336, and 0.2771 respectively were obtained for the Three GPS receivers, thereby revealing that Sokkia GPS performed optimally in obtaining heights above the ellipsoid. However, as a combination of horizontal and  vertical positions (3-Dimension), Sokkia GPS performed best while ProMark GPS performed averagely and South GPS performed least. This study shows that any of the three GPS receivers can provide reasonable accurate geographic data. However, a definite conclusion remains that the selection of an optimal GPS receiver in this study for any project will largely depend upon the user’s needs and project requirements as the significant variation observed in the height coordinates should be further investigated. Keywords: GPS Receivers, Accuracy, Position Determination, GPS Coordinates

scholarly journals FISHING GROUND, CACTH COMPOSITION, HOOK RATE AND LENGTH DISTRIBUTION OF BILLFISHES CAUGHT BY TUNA LONG LINE IN INDIAN OCEAN

2013 ◽  
Vol 19 (2) ◽  
pp. 85
Author(s):  
Fathur Rochman ◽  
Abram Barata ◽  
Budi Nugraha
Keyword(s):  
Indian Ocean ◽  
Average Length ◽  
Economic Value ◽  
Length Distribution ◽  
Fork Length ◽  
Fishing Ground ◽  
Istiophorus Platypterus ◽  
Blue Marlin ◽  
Long Line ◽  
Catch Composition

Billfishes area by cacth of tuna long line vessels in Indian Ocean. Billfish are consist of swordfish <em>Xiphias gladius</em>, black marlin <em>Makaira indica</em>, indo facific blue marlin <em>Makaira mazara</em>, stripe marlin <em>Tetrapturus audax</em>, indo facific sailfish <em>Istiophorus platypterus</em> and shortbill spearfish <em>Tetrapturus angustirostris</em>. Besides that, billfishes also have important economic value compared with tuna as an exsported species such as swordfish and marlin. To optimize the catch of billfishes in Indian Ocean, data and information of potential fishing ground, size and catch composition of this species are needed. The billfishes cacth composition collected in 2011 were dominated by 45% swordfish, 20% black marlin, 19% blue marlin,9% short bill spearfish, 6% sailfish and 1%stripe marlin. The billfishes size range which were caught between 60 - 280 cm LJFL (Lower Jaw Fork Length). The sword fish average length was 150 cm, blue marlin 197 cm, black Marlin 189 cm, sailfish 150cm ,short bill spearfish 144 cm and stripe marlin159 cm. From this observation, it was found that most of billfishes caught were in mature.

GPS and GSM Based Tracking System for Objects Moving over Wide Geographical Areas

2018 ◽  
Vol 2 (1) ◽  
Author(s):  
Fatima Ameen ◽  
Ziad Mohammed ◽  
Abdulrahman Siddiq
Keyword(s):  
Global Positioning System ◽  
Mobile Communications ◽  
Moving Objects ◽  
Tracking System ◽  
Geographical Area ◽  
Tracking Systems ◽  
Acceptable Result ◽  
Internet Service ◽  
Global Positioning ◽  
Tracking Objects

Tracking systems of moving objects provide a useful means to better control, manage and secure them. Tracking systems are used in different scales of applications such as indoors, outdoors and even used to track vehicles, ships and air planes moving over the globe. This paper presents the design and implementation of a system for tracking objects moving over a wide geographical area. The system depends on the Global Positioning System (GPS) and Global System for Mobile Communications (GSM) technologies without requiring the Internet service. The implemented system uses the freely available GPS service to determine the position of the moving objects. The tests of the implemented system in different regions and conditions show that the maximum uncertainty in the obtained positions is a circle with radius of about 16 m, which is an acceptable result for tracking the movement of objects in wide and open environments.

Aplikasi Pemosisi Lokal Berbasis Android Dengan Menggunakan GPS

INTI TALAFA ◽  
2018 ◽  
Vol 8 (2) ◽  
Author(s):  
Yaman Khaeruzzaman
Keyword(s):  
Global Positioning System ◽  
Positioning System ◽  
Database Server ◽  
Global Positioning

Seiring dengan pesatnya kemajuan teknologi saat ini, kebutuhan manusia menjadi lebih beragam, termasuk kebutuhan akan informasi. Tidak hanya media informasinya yang semakin beragam, jenis informasi yang dibutuhkan juga semakin beragam, salah satunya adalah kebutuhan informasi akan posisi kita terhadap lingkungan sekitar. Untuk memenuhi kebutuhan itu sebuah sistem pemosisi diciptakan. Sistem pemosisi yang banyak digunakan saat ini cenderung berfokus pada lingkup ruang yang besar (global) padahal, dalam lingkup ruang yang lebih kecil (lokal) sebuah sistem pemosisi juga diperlukan, seperti di ruang-ruang terbuka umum (taman atau kebun), ataupun dalam sebuah bangunan. Sistem pemosisi lokal yang ada saat ini sering kali membutuhkan infrastruktur yang mahal dalam pembangunannya. Aplikasi Pemosisi Lokal Berbasis Android dengan Menggunakan GPS ini adalah sebuah aplikasi yang dibangun untuk memenuhi kebutuhan pengguna akan informasi lokasi dan posisi mereka terhadap lingkungan di sekitarnya dalam lingkup ruang yang lebih kecil (lokal) dengan memanfaatkan perangkat GPS (Global Positioning System) yang telah tertanam dalam perangkat smartphone Android agar infrastruktur yang dibutuhkan lebih efisien. Dalam implementasinya, Aplikasi Pemosisi Lokal ini bertindak sebagai klien dengan dukungan sebuah Database Server yang berfungsi sebagai media penyimpanan data serta sumber referensi informasi yang dapat diakses melalui jaringan internet sehingga tercipta sebuah sistem yang terintegrasi secara global. Kata kunci: aplikasi, informasi, pemosisi, GPS.

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