scholarly journals Fishing Ground Mapping of Demersal Fish in The Riau Islands Province Waters Related to the Oceanographic Factors

2021 ◽  
Vol 934 (1) ◽  
pp. 012061
Author(s):  
A B Sambah ◽  
M F F Fardilah ◽  
M A Z Fuad ◽  
M A Rahman
Keyword(s):  
Demersal Fish ◽  
Sea Surface ◽  
Fishing Ground ◽  
Research Areas ◽  
Fish Catch ◽  
Oceanographic Parameter ◽  
Level 3 ◽  
Parameters Analysis ◽  
Oceanographic Data ◽  
The Relationship

Abstract Research on the potential fishing ground for demersal fishing is a way to determine the areas that have the potential for fishing activities. Potential fishing ground mapping can be done by observing the dynamics of oceanographic parameters. The use of satellite imagery helps in providing oceanographic data in order to study the variability of oceanographic parameter. The aim of the study was to analyse the relationship between oceanographic parameter and demersal fish catch in order to validate potential fishing grounds for demersal fish. This research has been conducted in the waters of the Riau islands. Field observations and data collection including surveys of fishing grounds and identification of fish catches were carried out during March to August 2020. To support the analysis, Aqua-Modis Level-3 satellite data was used to observe the oceanographic variations. The data used in the analysis consisted of fishing grounds coordinate information, catches, sea surface temperature, chlorophyll-a, water depth, and salinity. The results showed that during the period 2010-2020, oceanographic dynamics did not experience significant changes or tended to be stable. Most of the research areas indicated appropriate categories for fishing activities based on the research parameters analysis. The correlation of the research parameters described a significant effect on fishing activities.

scholarly journals Identifikasi Fishing Ground Ikan Teri (Stolephorus sp) Menggunakan Citra Modis di Perairan Karimunjawa, Jepara

2018 ◽  
Vol 7 (2) ◽  
pp. 103
Author(s):  
Rizky Aditya ◽  
Anindya Wirasatriya ◽  
Kunarso Kunarso ◽  
Lilik Maslukah ◽  
Petrus Subardjo ◽  
...  
Keyword(s):  
Chlorophyll A ◽  
Sea Surface ◽  
Fishing Ground ◽  
The West ◽  
Fishing Activity ◽  
Fish Catch ◽  
Level 3 ◽  
Chlorophyll Distribution ◽  
Common Target ◽  
Chlorophyll A Distribution

Fishing ground  atau  zona  penangkapan ikan  adalah  suatu  kawasan perairan  yang  menjadi sasaran dalam usaha penangkapan ikan. Ikan teri merupakan hasil tangkapan ikan yang populer di Karimunjawa. Penelitian ini bertujuan memprediksi zona tangkapan ikan di Perairan Karimunjawa berdasarkan sebaran klorofil-a dan suhu permukaan laut dengan memanfaatkan data citra satelit Aqua Modis level-3. Sebaran klorofil-a yang tinggi terlihat pada bulan Mei sampai Juli. Nilai korelasi antara klorofil-a dengan tangkapan ikan di lapangan sebesar r=0,869 yang berarti berhubungan sangat erat. Sedangkan nilai korelasi Suhu Permukaan Laut (SPL) dengan tangkapan ikan hanya sebesar r=0,387. Hal ini berarti hasil tangkapan ikan teri di Kepulauan Karimunjawa lebih dipengaruhi oleh sebaran klorofil-a dari pada SPL. Oleh karena itu dalam penentuan potensi fishing ground dengan menggunakan data MODI klimatologi bulanan, kami hanya menggunakan parameter klorofil-a. Perairan Karimunjawa memiliki kandungan klorofil-a rata rata sebesar 0,29 mg/m3. Berdasarkan analisa sebaran klorofil-a klimatologi bulanan, lokasi potensi fishing ground berada pada barat dan tenggara dari perairan Pulau Nyamuk, Barat Pulau Kemujan termasuk Pulau Cemara Besar dan Kecil, dan di perairan sekitar Pulau Parang yang dapat ditemukan disetiap bulannya. Anchovy Ground Fishing Identification (Stolephorus sp) Using Fashionable Images in the Waters of Karimunjawa, Jepara Fishing ground or fishing zone is an area in the ocean which becomes a target for fishing activities. Common target for fishing activity in Karimunjawa is anchovy. The aim of this study is to predict fishing zone on the waters of Karimunjawa based on the chlorophyll distribution and sea surface temperature by utilizing level 3 Aqua MODIS data. The high chlorophyll-a distribution is observed from May to July. The correlation value between chlorophyll-a and fish catch based on insitu data is strong with r = 0.869. Conversely, the correlation between insitu SPL correlation and fish catch is weak with r = 0.38. Therefore, we only used chlorophyll-a parameter to determine the potential fishing ground in Karimun Jawa. Karimunjawa waters have an average chlorophyll-a conscentration of 0.29 mg/m3, Based on monthly climatology of MODIS  chlorophyll data, the location of potential fishing ground is west and southeast from the waters of the island of Nyamuk, the west of Kemujan Island including Pulau Cemara Besar and Kecil, and in the waters around Parang Island which can be found every month.

scholarly journals Variasi Musiman Hubungan Antara Parameter Oceanografi Dengan Hasil Tangkapan Ikan Tongkol Berdasarkan Data Harian Di Selat Bali

2017 ◽  
Vol 4 (1) ◽  
pp. 109 ◽  
Author(s):  
I Gusti Agung Bagus Wisesa Sastra ◽  
I Wayan Gede Astawa Karang ◽  
Abd. Rahman As-syakur ◽  
Yulianto Suteja
Keyword(s):  
Chlorophyll A ◽  
Environmental Parameters ◽  
Pelagic Fish ◽  
Sea Surface ◽  
Fishing Ground ◽  
Temporal Fluctuation ◽  
Simple Correlation ◽  
The West ◽  
Chlorophyll A Concentration ◽  
Fish Catch

Mackerel fish that classified pelagic fish and an export commodity in Indonesia. Distribution of mackerel fish are foundn all Indonesian waters, one of them in the Bali Strait. Distribution of mackerel fish influenced by oceanographic condition such as sea surface temperature (SST) and chlorophyll-a concentration. SST and chlorophyll-a concentrations are environmental parameters that can provide information on fishing ground. The purpose of this research is explained the temporal fluctuation and relationship between SST and chlorophyll-a concentration with mackerel fish had been catch in Bali Strait waters during 2011-2016. Data were analyzed using simple correlation analysis with 95% confidence interval. Temporally, the highest average SST occurred during the transition season I (March-May) and the lowest in the east season (June-August). The highest average chlorophyll-a concentration occurs in the east season and the lowest in the west season (December-February). The highest catch of mackerel fish occurred during transitional season II (September-November) and lowest in west season. The association between SST and chlorophyll-a concentration on mackerel fish catch showed low correlation with significant relationship, whereas concentration between SST and chlorophyll-a concentration strong with significant correlation

scholarly journals RELATIONSHIP BETWEEN CHLOROPHYLL-A AND SEA SURFACE TEMPERATUR WITH Sardinella lemuru CATCHING IN BALI STRAIT

2021 ◽  
Vol 15 (1) ◽  
pp. 12
Author(s):  
Niken Gustantia ◽  
Takahiro Osawa ◽  
I Gusti Bagus Sila Dharma ◽  
Wayan Sandi Adnyana
Keyword(s):  
Chlorophyll A ◽  
Sea Surface ◽  
Fishing Ground ◽  
Fish Production ◽  
Resource Potential ◽  
Chl A ◽  
Remote Sensing Technique ◽  
Fish Resources ◽  
Fish Catch ◽  
Total Fish

The Bali Strait is one of Indonesia's territorial waters that have high natural resource potential. The area is only about 2,500 km2 but has a high potential fishing ground. The Bali Strait has unique and dynamic waters that can cause fluctuations in fish production amount each year. The largest type of fish caught in the Bali Strait is lemuru (Sardinella lemuru), a fish found only in the Bali Strait. This fish plays a significant role in the economy of fishers in the Bali Strait. Each year the catch of lemuru has fluctuated, making fishing locations challenging to predict. Sea Surface Temperature (SST) and Chlorophyll-a (Chl-a) are oceanographic parameters that can affect the resources of the ocean. Oceanographic phenomena, such as upwelling, can also influence the condition of fish resources. Therefore, understanding the relationships between these factors is essential in practical fisheries management. Observation of oceanographic factors is very hard with the field observation due to time and cost limitations. The remote sensing technique is an efficient method to determine SST distributions and Chl-a concentrations using satellite imagery. This study analyzes SST and Chl-a concentration in the Bali Strait using the Global Change Observation Mission(GCOM-C) satellite and determines the correlation between Chl-a and SST with a total fish catch(lemuru) during 2019. The results showed the maximum average Chl-a concentration observed on August 1.62 mg/m3 and the lowest concentration observed on January 0.45 mg/m3, the maximum SST on March was 28.12° C, and on August (Dry season) with 22.40° C. The SST variable's influence provides a negative correlation (R = -0.209) with changes in lemuru catch, while the Chl-a parameter has a positive correlation (R = 0.375) with changes in the catch. The pattern of relationship between Chl-a with fish catching had a good relationship than the SST in 2019.Keywords: Bali Strait; Sardinella lemuru; SST; Chl-a.

scholarly journals ZONASI PEMANFAATAN KAWASAN PERIKANAN TANGKAP DI TELUK BANTEN (Zonation of Utilization Fishing Zone in Banten Bay)

2013 ◽  
Vol 2 (2) ◽  
pp. 177
Author(s):  
D. Ernaningsih ◽  
Domu Simbolon ◽  
Eko Sri Wiyono ◽  
Ari Purbayanto
Keyword(s):  
Demersal Fish ◽  
Sea Surface ◽  
Fishing Ground ◽  
Gis Analysis ◽  
Fishing Season ◽  
Development Indicators ◽  
Relationship Analysis ◽  
Index Analysis ◽  
Zone Ii ◽  
Fishing Area

<p>Utilization of fishing area in Banten Bay by various activities may cause multi sectors conflicts related to management of the bay. The integrated zone system in that area has not been established yet; therefore it is needed to be studied. The objectives of this study were to 1) determine fishing season and fishing ground; 2) determine indicators and criteria of fishing zone; 3) establish fishing zone. The study was conducted in four fish landing centers which are located in Karangantu, Terate, Wadas, and Kepuh from January to April 2010. Data were collected by surveying analyzed using the fishing season index analysis, relationship analysis between sea surface temperature, chlorophyll-a and fish abundance, and GIS analysis. Based on the results, it were revealed that 1) peak fishing season of pelagic fish was from November to January and demersal fish was from November to December; 2) the catches from fishing grounds surrounding Panjang island were anchovies, trevallies, squids, Indian mackerels, pony fishes, Fringescale sardinella; surrounding Pamujan besar island were threadfin bream, shrimps; and surrounding Tunda island were eastern little tuna, narrow barred king mackerels, black pomfret, red snapper, great trevally, scads, mullets, squids; 3) development indicators of fishing zone were (i) feasibility of fishing ground, (ii) compatibility of fishing gears with fishing grounds, (iii) possibility of conflicts, (iv) infrastructure, (v) carrying capacity of environment; 4) Banten bay water was divided into three fishing zones, they were (i) passive zone, (ii) passive and outboard motor zone, (iii) active and inboard motor zone.</p><p><strong>Key words:</strong> fishing ground, fishing zone, utilization</p>

scholarly journals Pengaruh ekstrak udang pada umpan terhadap hasil tangkapan pancing dasar di perairan Tateli Weru, Kabupaten Minahasa

2016 ◽  
Vol 2 (3) ◽  
Author(s):  
Ucha E. Janis ◽  
Alfret Luasunaung ◽  
Lefrand Manoppo
Keyword(s):  
Experimental Method ◽  
Coastal Waters ◽  
Scientific Information ◽  
Demersal Fish ◽  
T Test ◽  
Fishing Ground ◽  
Fishing Gear ◽  
Fish Catch

ABSTRACT The success of baited hook and line fishing gear is determined by the activity of fish in terms of finding and catching food. Adding shrimp extract on bait may increase the fishing power of the bait; but this kind of scientific information, particularly on the bottom hand line is not widely available. This study aimed to determine the effect of shrimp extracts on demersal fish catch in the surrounding fishing ground and to identify the species caught by the bottom hand line. This research was conducted in coastal waters Tateli Weru Village, District of Mandolang, Minahasa in October 2015 which was based on an experimental method. Six units of bottom hand line was operated, where three units using bait of scad mackerel marinated in shrimp extract, and three other units using plain bait of scad mackerel; and the data were analyzed using t-test. Total catches was 60 fish; 38 fish caught by bait with shrimp extract, and 22 fish caught by bait without shrimp extract. The results showed that use of bait with shrimp extract give more catches. Keywords: bottom hand line, extrack of shrimp, demersal fish, Tateli Weru   ABSTRAK Keberhasilan alat tangkap pancing dasar berumpan sangat ditentukan oleh aktivitas hidup ikan dalam hal mencari dan menangkap makanan. Pemberian ekstrak udang pada umpan diduga dapat meningkatkan kemampuan tangkap dari umpan; namun informasi ilmiah seperti ini, khususnya pada pancing dasar belum banyak tersedia. Penelitian ini bertujuan untuk mengetahui pengaruh ekstrak udang terhadap hasil tangkapan ikan demersal di sekitar daerah penangkapan dan mengidentifikasi jenis ikan hasil tangkapan pancing dasar. Penelitian ini dilakukan di perairan pantai Desa Tateli Weru, Kecamatan Mandolang Kabupaten Minahasa  pada bulan Oktober 2015 yang didasarkan pada metode experimental. Enam unit pancing dasar dioperasikan, di mana tiga unit menggunakan umpan ikan malalugis yang direndam dalam ekstrak udang, dan tiga unit lainnya hanya menggunakan umpan ikan malalugis tanpa ekstrak; dan data dinalisis dengan uji t. Tangkapan total berjumlah 60 ekor; 38 ekor tertangkap dengan umpan yang diberi ekstrak udang, dan 22 ekor tertangkap dengan umpan tidak memiliki ekstrak udang. Hasil analisis menunjukkan bahwa penggunaan ekstrak udang pada umpan memberikan hasil tangkapan yang lebih banyak. Kata-kata kunci: pancing dasar, ekstrak udang, ikan demersal, Tateli Weru

scholarly journals Oceanographic variability and its influence on pelagic fish catch in the Bali Strait

2020 ◽  
Vol 26 (1) ◽  
pp. 8-16
Author(s):  
Abu Bakar Sambah ◽  
Trisnanda Devi Oktavia ◽  
Denny Wijaya Kusuma ◽  
Fenni Iranawati ◽  
Nurin Hidayati ◽  
...  
Keyword(s):  
Indian Ocean ◽  
Pelagic Fish ◽  
Sea Surface ◽  
Geographical Information ◽  
Fishing Ground ◽  
Time Interval ◽  
Fishing Trip ◽  
Positive Correlation ◽  
Fish Catch ◽  
The Indian Ocean

The existence of pelagic fish resources is greatly influenced by the condition of the waters which are described through its relationship with the oceanographic parameters. As a dominant species in Bali Strait, lemuru fish (Sardinella lemuru) have catch dynamics that vary each year. Oceanographic factor influence the number of fish catch in Bali Strait, in which global phenomena such as ENSO and IOD also have a role in influencing the migration of marine resources. This research aims to analysis annual variation of Sea Surface Temperature (SST) and Sea Surface Chlorophyll-a (SSC) in Bali Strait, and its effect on fish catch. The method applied a quantitative descriptive with correlation analysis and spatial analysis using Geographical Information System approach. The analysis described a significant impact of oceanographic parameters on pelagic fish catch. SSC has a significant impact on the number of fish catch which describes a positive correlation, and it illustrated a time interval between the highest concentration of SSC and the period of fishing peak season. It also impacts the fishing trip and the distribution of fishing ground that spread along the area of the Indian Ocean to Bali Strait. SSC has a significant impact on the number of fish catch which describes a positive correlation, and it illustrated a time interval between the highest concentration of SSC and the period of fishing peak season. It also impacts the fishing trip and the distribution of fishing ground that spread along the area of the Indian Ocean to Bali Strait

scholarly journals ANALISIS HUBUNGAN SUHU PERMUKAAN LAUT DAN KLOROFIL-A CITRA SATELIT SUOMI NPP VIIRS TERHADAP HASIL TANGKAPAN PURSE SEINE DI PPN PENGAMBENGAN, BALI (Analysis of the Relationship of Sea Surface Temperature and Chlorophyll-a The Suomi NPP VIIRS Satellite Image Against the Catch of the Seine Purse in PPN Pengambengan, Bali)

2019 ◽  
Vol 14 (2) ◽  
pp. 128
Author(s):  
Muhammad Zahrul Ghufron ◽  
Imam Triarso ◽  
Kunarso Kunarso
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Chlorophyll A ◽  
Satellite Image ◽  
Sea Surface ◽  
Purse Seine ◽  
Fishing Ground ◽  
Fishing Vessels ◽  
Euthynnus Affinis ◽  
The Relationship

Perikanan Tongkol (Euthynnus affinis) di Perairan Selat Bali  berkembang pesat sejak diperkenalkannya alat tangkap  Purse seine, hal tersebut menyebabkan semakin meningkatnya jumlah armada kapal penangkap ikan. Meskipun upaya penangkapan meningkat, akan tetapi hasil tangkapan yang didapatkan menurun. Untuk tujuan tersebut diperlukan kajian yang mendalam tentang pola sebaran suhu permukaan laut dan klorofil-a, agar ke depan dapat diketahui daerah penangkapan ikan Tongkol. Penelitian ini mengkaji perbedaan nilai persebaran SPL dan klorofil-a yang secara nyata di lapangan dengan data hasil interpretasi citra satelit Suomi NPP VIIRS, serta mengetahui hubungan distribusi SPL dan klorofil-a terhadap hasil tangkapan ikan Tongkol (Euthynnus affinis). Metode yang digunakan dalam penelitian ini adalah metode deskriptif. Hasil yang didapatkan pada penelitian ini adalah, tingkat akurasi citra satelit Suomi NPP VIIRS pada variabel suhu permukaan laut mencapai 98,98%, sementara untuk tingkat akurasi terhadap konsentrasi klorofil-a mencapai 95,63%. Hubungan suhu permukaan laut dan klorofil-a terhadap CPUE yaitu menunjukan pengaruh yang cukup kuat dengan nilai sebesar 0,585. Nilai r2 menunjukan nilai sebesar 34,3%, yang berarti bahwa sebesar 34,3% CPUE dipengaruhi oleh suhu permukaan laut dan klorofil-a, sedangkan 65,7% dipengaruhi oleh faktor-faktor lain Eastern Little Tuna (Euthynnus affinis) in the Waters of Bali Strait has been growing rapidly since the introduction of purse seine fishing gear, this has led to an increasing number of fishing vessels. Although the fishing effort increases, the catch obtained decreases. For this purpose an in depth study of the distribution patterns of sea surface temperature and chlorophyll-a is needed, so that in the future it can be known the fishing ground to assist in the effective and efficient utilization of fish resources. This study examines the differences in the value of the distribution of sea surface temperature and chlorophyll-a that are evident in the field with data from interpretation of Somi NPP VIIRS satellite images, and knowing the relationship between the distribution of sea surface temperature and chlorophyll-a to the Eastern Little Tuna catches. The method used in this research is descriptive method. The results obtained in this study are, the accuracy of the Suomi NPP VIIRS satellite image on the variable sea surface temperature reaches 98.98%, while the level of accuracy of the chlorophyll-a concentration reached 95.63%, the relationship between sea surface temperature and chlorophyll-a on CPUE is a fairly strong correlation, with a correlation value of 0,585. The value of r2 means that 34.3% CPUE is influenced by sea surface temperature and chlorophyll-a, while 65.7% is influenced by other factors..

scholarly journals THE VULNERABILITY STUDY OF LEMURU (SARDINELLA LEMURU) FISH RESOURCES SUSTAINABILITY IN BALI STRAIT IN CORELLATION WITH ENSO AND IOD

2017 ◽  
Vol 11 (2) ◽  
pp. 140
Author(s):  
Candra Saputra ◽  
I Wayan Arthana ◽  
I Gede Hendrawan
Keyword(s):  
Indian Ocean ◽  
Surface Temperature ◽  
Sea Surface Temperature ◽  
El Niño ◽  
Strong Influence ◽  
El Nino ◽  
Southern Oscillation ◽  
Sea Surface ◽  
Fish Catch ◽  
The Relationship

The aim of this research is to know the relationship between lemuru fish catch to Sea Surface Temperature (SST), El-Nino Southern Oscillation (ENSO) and Indian Ocean Dipole (IOD) phenomenon in Bali Strait. The results showed, that in the period 2007 – 2016. fluctuations of catches lemuru tends to decline. Sea Surface Temperature (SST) distribution with the lowest temperature 25,28oC at 24,53oC - 27,16oC and the highest temperature is 29,31oC in the range of 28,730C – 30,490C. The lowest temperature occurred in July - September while the highest temperature occurred in January - April. Based on the calculation there is a linkage and relationship between catch and SST as shown on the value of determination and correlation reached 50,0% and 70,73%. Most of the catches occurred in the west season and then the transition II, transition I and East Season. The relationship of ENSO phenomenon to the catch during the El-Nino phase of lemuru catch will increase while in the phase of La-Nina the catch of lemuru will decrease, because time of El-Nino phase of the sea surface temperature (SST) relative low which results in the chlorophyll-a mean case which is a food sources of lemuru fish. Based on Trenberth's theory, (1997), the rise and fall of the ENSO Index of less than six months is not stated in ENSO. From the calculation results during the research of 2007 - 2016 happened three times ENSO phenomenon that is in 2009, 2010 and 2015. At the time of the IOD phenomenon, the IOD (+) phase will result in a decrease in catch while the normal IOD phase and (-) will increase the catch. From the results of this study can also be observed, in the year 2007 - 2011 phenomenon ENSO and IOD have a strong influence on the catch while in the year 2012 - 2016 the influence of the phenomenon of ENSO and IOD has no strong influence caused by the quantity of lemuru fish that have been over exploitation that resulted in the current Bali Strait on Over Fishing status.   Keywords : Fish Catch; El-Nino Southern Oscillation (ENSO); Indian Ocean                    Dipole (IOD)

scholarly journals DINAMIKA POPULASI SUMBER DAYA IKAN LAYUR (Lepturacanthus savala) DI PERAIRAN SELAT SUNDA (Population Dinamycs of Savalai Hairtail fish (Lepturacanthus savala) in Sunda Strait Waters)

2016 ◽  
Vol 6 (1) ◽  
pp. 77
Author(s):  
Siska Agustina ◽  
Menofatria Boer ◽  
Achmad Fahrudin
Keyword(s):  
Population Dynamic ◽  
Total Mortality ◽  
Demersal Fish ◽  
Fishing Ground ◽  
Natural Mortality ◽  
Male Fish ◽  
Growth Coefficient ◽  
Fish Exploitation ◽  
The Relationship ◽  
Lepturacanthus Savala

<p>ABSTRACT<br />Savalai hairtailis one of demersal fish that landed in PPP Labuan Banten with a fishing ground from the Sunda Strait waters. Savalaihairtail fish were caught by many gears (multigear) such as trawl, purse seine, small bottom trawl, and gillnet. This research aimed at reviewing population dynamic of savalai hairtail in Sunda Strait waters. The results showed the value of the growth coefficient (k) for female and male were 0,30/month and 0,23/month respectively, with asimptotic length (L∞) 710,41 mm for females and 856,52 mm for males. First length capture for females and males were 460,46 mm and 454,66 mm respectively. First length of maturity for female and male fish were 567,24 mm and 599,73 mm respectively. Natural mortality (M) for the female and male fish were 0,27/year and 0,22/year respectively. Total mortality (Z) for the female and male fish were 1,25/year and 1,60/year respectively. Based on the relationship between the values of M and Z, then the arrest of mortality (F) known for female and male fish were 0,97/years and 1,38/year respectively. The rate of exploitation for female and male fish were72% and 83% respectively. Based on the current rate exploitation, savalaihairtail fish exploitation has exceeded optimum exploited level (50%), so it indicated the savalaihairtail was overfishing. The value of Lc was smaller than Lm indicated savalaihairtail experienced growth overfishing.<br /><br />Keywords: growth overfishing, overfishing, savalai hairtail, Sunda Strait<br />-------</p><p>ABSTRAK<br /><br />Ikan layur merupakan salah satu ikan demersal yang didaratkan di PPP Labuan Banten dengan fishing ground dari perairan Selat Sunda. Ikan layur ditangkap dengan banyak alat tangkap diantaranya alat tangkap payang, pukat cincin, pukat pantai, jaring arad, dan jaring insang. Tujuan dari penelitian ini adalah mengkaji dinamika populasi sumber daya ikan layur (Lepturachantus savala) di Perairan Selat Sunda. Hasil penelitian menunjukkan nilai keofisien pertumbuhan (k) ikan betina dan jantan berturut-turut 0,30/bulan dan 0,23/bulan, dengan panjang asimptotik (L∞) 710,41 mm dan 856,52 mm. Panjang ikan pertama kali tertangka (Lc) untuk betina dan jantan berturut-turut sebesar 460,46 mm dan 454,66 cm. Panjang ikan layur pertama kali matang gonad (Lm) untuk betina sebesar 567,24 mm dan jantan sebesar 599,73 mm. Laju mortalitas alami (M)) untuk ikan betina sebesar 0,27/tahun dan ikan jantan sebesar 0,22/tahun. Mortalitas total (Z) untuk ikan betina sebesar 1,25/tahun dan ikan jantan sebesar 1,60/tahun. Berdasarkan hubungan antara nilai M dan Z, maka mortalitas penangkapan (F) diketahui untuk betina sebesar 0,97/tahun dan jantan sebesar 1.38/tahun. Laju ekploitasi ikan layur betina dan jantan berturut-turut sebesar 72% dan 83%. Berdasarkan nilai laju eksploitasi, pemanfaatan ikan layur telah melebihi pemanfaatan optimal (50%), sehingga di indikasikan mengalami tangkap lebih. Nilai Lc&lt;Lm menunjukkan tangkap lebih yang terjadi adalah growth overfishing.<br /><br />Kata kunci: growth overfishing, tangkap lebih, ikan layur, Selat Sunda</p>

Exploring the Influences of Service Characteristics on Individuals’Use Intention of Mobile Health Services (Preprint)

2020 ◽  
Author(s):  
Fei Liu ◽  
Pengkun Wu ◽  
Xitong Guo
Keyword(s):  
Personal Information ◽  
New Technology ◽  
Information Service ◽  
Health Care Research ◽  
Privacy Concern ◽  
Service Adoption ◽  
Service Characteristics ◽  
Research Areas ◽  
New Information ◽  
The Relationship

BACKGROUND Service characteristic factors are verified as the determinants for influencing people’s use intention of mHealth. Exploration of the interactions among the service characteristics of users can play an important role in improving service adoption rate. mHealth service appears to be an emerging new technology that presents a new pattern of healthcare service; however, users have concerns that their personal information might be disclosed and used without permission. This concern hinders people’s adoption behavior of mHealth services. OBJECTIVE The objective of this study is to explore how service characteristics (service relevance and service accuracy) interact to influence individuals’ use intention of mHealth services. This study also investigates the moderating roles of innovativeness and privacy concern. METHODS To meet these objectives, six hypotheses thus developed were empirically validated using a survey to test the effects of service characteristics and personal traits on use intention of mHealth. RESULTS We confirm that service relevance and service accuracy positively and directly influence individuals’ use intention of mHealth services. In addition, innovativeness positively affects the relationship between service relevance and use intention. Privacy concern negatively influences the relationship between service relevance and use intention, but positively influences the relationship between service accuracy and use intention. CONCLUSIONS The present study provides new insights into the influencing factors of individuals’ usage behaviour toward mHealth services. Such insight could provide further understanding of how individuals adopt new information service or technologies, which contribute to both information system and health care research areas in a very promising way.

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