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 ANALISIS SPASIAL DAN TEMPORAL AKTIVITAS KAPAL IKAN DI PERAIRAN SELATAN ARU MENGGUNAKAN CITRA MODIS DAN RADARSAT-2

2016 ◽  
Vol 9 (2) ◽  
pp. 155
Author(s):  
Dendy Mahabror ◽  
Abdul Rohman Zaky
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Chlorophyll A ◽  
Temporal Analysis ◽  
Sea Surface ◽  
Fishing Ground ◽  
The West ◽  
Chlorophyll A Concentration ◽  
Fishing Vessels ◽  
Spatial And Temporal Analysis

<p class="ColorfulList-Accent11CxSpFirst"><em>Perairan selatan Aru merupakan daerah penangkapan  ikan yang potensial dengan sumberdaya ikannya yang berlimpah. Kapal-kapal ikan melakukan penangkapan ikan dengan mempertimbangkan kondisi kesuburan perairan yaitu fenomena upwelling melalui parameter suhu permukaan laut dan kelimpahan konsentrasi klorofil-a. Penggunaan citra MODIS secara periodik dapat menggambarkan waktu dan lokasi upwelling. Variabilitas suhu permukaan laut dan konsentrasi klorofil-a di lintang 7 LS dan 7.5 LS, bujur 133.1 – 136 BT menunjukkan fenomena upwelling pada musim Timur dimana suhu permukaan laut menurun hingga 24 <sup>o</sup>C sedangkan konsentrasi klorofil-a rata-rata meningkat hingga 3.61 mg/m<sup>3</sup>. Fenomena downwelling terjadi di musim Barat dimana suhu permukaan laut di lintang yang sama menjadi hangat berkisar 30<sup> o</sup>C dengan konsentrasi rata-rata klorofil-a &lt;1 mg/m<sup>3</sup>. Jumlah kapal ikan yang beroperasi di daerah penangkapan diketahui dengan menggunakan citra Radarsat-2 dan data VMS yang disesuaikan dengan waktu pengambilan citra di setiap bulannya dengan lokasi yang sama. Analisis spasial dan temporal dilakukan untuk mengetahui sebaran kapal ikan pada musim timur saat kesuburan perairan tinggi dimana konsentrasi klorofil-a di titik penangkapan mencapai 5.01 mg/m<sup>3</sup> dan jumlah kapal ikan yang beroperasi &gt;150 unit/hari. Pada musim Barat kesuburan perairan rendah dimana konsentrasi klorofil-a di titik penangkapan &lt;1 mg/m<sup>3 </sup>dan jumlah kapal ikan yang beroperasi &lt;40 unit/hari.</em></p><p class="ColorfulList-Accent11CxSpMiddle"> </p><p class="ColorfulList-Accent11CxSpMiddle"><strong>KATA KUNCI</strong></p><p class="ColorfulList-Accent11CxSpLast">klorofil-a, Modis, perairan selatan Aru, Radarsat-2, suhu permukaan laut.</p><p class="ColorfulList-Accent11CxSpLast"> </p><p align="center"><strong><em>SPATIAL AND TEMPORAL ANALYSIS OF WATER PRODUCTIVITY AFFECTING ACTIVITIES IN FISHING VESSEL AT SOUTH ARU FISHING GROUND USING MODIS IMAGE AND RADARSAT-2</em></strong><strong><em></em></strong></p><p class="ColorfulList-Accent11CxSpFirst"><em>Southern Aru waters is a potential fishing areas with abundant fish resources. Fishing boats catch fish by considering the condition of the waters productivity such as upwelling phenomenon through the parameters of sea surface temperatures and an abundance of chlorophyll-a concentration. The use of MODIS imagery can periodically describe the timing and location of upwelling. Variability of sea surface temperature and chlorophyll-a concentration in latitude 7 LS and 7.5 LS, longitude 133.1 - 136 BT showed the phenomenon of upwelling in the east season where sea surface temperature decreased from 30° C to 24° C while the chlorophyll-a concentration increased by an average of 0,3 mg/m<sup>3</sup> to 3.61 mg/m<sup>3</sup>. Downwelling phenomenon took place in the west season where the sea surface temperature in the same latitude range 30° C to be warm with an average concentration of chlorophyll-a &lt;1 mg/m<sup>3</sup>. The number of fishing vessels operating in the fishing area known using RADARSAT-2 imagery and data VMS were later adapted to capture images of each month at the same location. Based on the spatial and temporal analysis was conducted to determine the distribution of fishing vessels in the eastern summer time high waters productivity where the concentration of chlorophyll-a at the point reached 5:01 mg m<sup>3</sup>, the number of fishing vessels in operation increased to 150 units/ ay. While in the West season low waters productivity where the concentration of chlorophyll-a at the point of &lt;1 mg/m<sup>3</sup> and the number of ships in operation decreased to below 40 units/day. This suggests that the increase in the number of fishing fleets affected by the level of waters productivity or fishing season in the East to Transition II at the southern Aru Islands waters.</em></p><p class="ColorfulList-Accent11CxSpMiddle"><em> </em></p><p class="ColorfulList-Accent11CxSpLast"><strong>Keywords: </strong><em>Chlorophyll-a, Modis, the south of Aru, RADARSAT-2, Sea surface temperature.</em></p>

scholarly journals STUDY OF SHORT MACKEREL CATH, SEA SURFACE TEMPERATURE, AND CHLOROPHYLL -A IN THE MAKASSAR STRAIT

2010 ◽  
Vol 6 (1) ◽  
Author(s):  
Bambang Semedi ◽  
Ratih Dewanti Dimyati
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Chlorophyll A ◽  
Chlorophyll Concentration ◽  
Concentration Field ◽  
Sea Surface ◽  
Fishing Ground ◽  
Commercial Fishing ◽  
South Sulawesi ◽  
Fishing Vessels

The Makassar Strait is the major fishing ground for Short Mackerel (Rastrelliger spp) fisheries in South Sulawesi, Indonesia using both commercial fishing vessels and boats with traditional fishing gear. Though Short Mackerel is one of dominant commercial food fishes in South Sulawesi, the annual Cath per Unit Effort (CPUE) has been decreasing from year to year. In 2000, the total of annual CPUE was 22,117 tons and in 2007, it was 17,596 tons. The purpose of this research was to forecast the fishing ground of Short Mackerel employing Moderate Resolution Imaging Spectroradiometer (MODIS) satellite images in Makassar Strait territory with the study interest of 3 S and to 5 S and 118 E to 120 E. This research was conductade from September 15 to October 20, 2007. Fishing data were collected from the fishermen including fishing locations, catch, sea surface temperature, and chlorophyll concentrations. To determine the relationship between cacth and oceanographic parameters, linear regression was employed. We also examined sea surface temperature (SST) and Chlorophyll-a concentration field data vs. MODIS satellite data. The result showed that SST andChlorophyll distributions have close relationship with the distribution of fishing location of Short Mackerel. The fishing location tends to spread on the waters with the SST ranged from 26 degree of celcius to 29 degree of celcius and Chlorophyll concentration from 1.19 mg per m to 1.25 mg per m. Keywords: Chlorophyll-a, MODIS, Sea Surface Temperature.

scholarly journals Chlorophyll-a variability during positive IOD - the east season period in 2019 in Padang Sea, Indonesia

2020 ◽  
Vol 200 ◽  
pp. 06002
Author(s):  
Dandi Arianto Pelly ◽  
Muh Aris Marfai ◽  
Evita Hanie Pangaribowo ◽  
Akhmad Fadholi
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Chlorophyll A ◽  
Satellite Image ◽  
Temporal Distribution ◽  
Image Data ◽  
Sea Surface ◽  
Chlorophyll A Concentration ◽  
Positive Indian Ocean Dipole ◽  
Point Data

This study aimed to identify the effect of the positive Indian Ocean Dipole (IOD) phenomenon on the spatial, temporal distribution of chlorophyll-a concentrations in the East Season in Padang Sea in 2019. The method used in this research was the Kriging analysis method applied in oceanographic parameter satellite imagery extraction point data. By applying the method, we produced the maps of the spatial distribution variation of chlorophyll-a content and Sea Surface Temperature (SST). The data of IOD events in 2019 showed the occurrence of a strong positive IOD phenomenon that caused anomaly in the Sea Surface Temperature (SST) in Padang Sea. The interpretation of Aqua-Modis level 2 satellite image data showed that the sea surface temperature during the East Season was relatively cold, which was in the minimum temperature ranging from 18.5-22°C with a normal temperature condition of 28-29°C. The minimum chlorophyll-a concentration in the East Season was 0.252 mg/m3; while the maximum value reached 18.5 mg/m3. The distribution value of chlorophyll-a concentration was 1.028 mg/m3.The RMSe Cross Validation value obtained was 0.504 for SST and 0.363 for chlorophyll-a with a mean SST of -0.0005 and mean chlorophyll-a of -0.0039.

scholarly journals Spatiotemporal Variability of Chlorophyll-a and Sea Surface Temperature, and Their Relationship with Bathymetry over the Coasts of UAE

2021 ◽  
Vol 13 (13) ◽  
pp. 2447
Author(s):  
Khalid A. Hussein ◽  
Khameis Al Abdouli ◽  
Dawit T. Ghebreyesus ◽  
Pakorn Petchprayoon ◽  
Naeema Al Hosani ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Chlorophyll A ◽  
Harmful Algal Bloom ◽  
Arabian Gulf ◽  
Sea Surface ◽  
Spatiotemporal Variability ◽  
Entire Study ◽  
Chl A ◽  
The Relationship

The catastrophic implication of harmful algal bloom (HAB) events in the Arabian Gulf is a strong indication that the study of the spatiotemporal distribution of chlorophyll-a and its relationship with other variables is critical. This study analyzes the relationship between chlorophyll-a (Chl-a) and sea surface temperature (SST) and their trends in the Arabian Gulf and the Gulf of Oman along the United Arab Emirates coast. Additionally, the relationship between bathymetry and Chl-a and SST was examined. The MODIS Aqua product with a resolution of 1 × 1 km2 was employed for both chlorophyll-a and SST covering a timeframe from 2003 to 2019. The highest concentration of chlorophyll-a was seen in the Strait of Hormuz with an average of 2.8 mg m−3, which is 1.1 mg m−3 higher than the average for the entire study area. Three-quarters of the study area showed a significant correlation between the Chl-a and SST. The shallow (deep) areas showed a strong positive (negative) correlation between the Chl-a and SST. The results indicate the presence of trends for both variables across most of the study area. SST significantly increased in more than two-thirds of the study area in the summer with no significant trends detected in the winter.

scholarly journals ANALYSIS OF YELLOWFIN TUNA (Thunnus albacares) FISHING GROUND BASED ON SEA SURFACE TEMPERATURE AND CHLOROPHYLL-A IN THE WEST SUMATERA WATERS

2020 ◽  
Vol 3 (3) ◽  
pp. 236-247
Author(s):  
Ridwan Habibullah ◽  
Mubarak ◽  
Musrifin Galib
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Chlorophyll A ◽  
Yellowfin Tuna ◽  
Sea Surface ◽  
Fishing Ground ◽  
Total Catch ◽  
Research Survey ◽  
Tuna Fishing ◽  
Aquatic Productivity

This research was conducted on September 2019 in west Sumatera waters which was aimed to find out the level of aquatic productivity, to analyze the yellowfin tuna fishing ground and to find out the corelation between sea surface temperature (SST) and chlorophyll-a with the total catch of yellowfin tuna. In conducting the research, survey and spatial analyze were used as the method. The highest total catch of yellowfin tuna was on October 2019 with the total 60.610 kg and the CPUE 166 kg/trip. On the other hand, the lowest total catch was on June with the total 18.080 kg and CPUE 92,7179 kg/trip. Based on the result of the CPUE, October is the best month for fishing. The correlation coefficient between SST and total catch in 2018 was -0.69 which mean there was a negative correlation. Meanwhile, the correlation chlorophyll-a with the total catch was 0.65 which mean the corelation between both variables were not good

scholarly journals SEBARAN SPL KAITANNYA DENGAN HASIL TANGKAPAN IKAN CAKALANG (KATSUWONUS PELAMIS) DI PERAIRAN ACEH

1970 ◽  
Vol 10 (1) ◽  
pp. 11-22
Author(s):  
M. Habib EY ◽  
. Nofrizal ◽  
Mubarak .
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Satellite Image ◽  
Economic Value ◽  
Sea Surface ◽  
Fishing Ground ◽  
Survey Method ◽  
Optimum Temperature ◽  
Katsuwonus Pelamis ◽  
East West

ABSTRACTSkipjack (Katsuwonus pelamis) has high economic value and many catched in Aceh waters. This study aims to calculate the catch of skipjack, compare the Sea-Surface Temperature (SST) on satellite image with real sea-surface temperature, and determine the effect of sea-surface temperature for the skipjack catch in Aceh waters. This study used data of skipjack catch, sea-surface temperatureon satellite image and real sea-surface temperature (on field) that was conducted in September 2017, using survey method in 32 points of fishing ground with 3 trips. Average of sea-surface temperature was around 27.24 oC, while the sea-surface temperature in Aqua MODIS images was around 28.21 oC in the transition of east-west season. There was differences in real sea-surface temperature and image sea-surface temperature of satellite, but it is not significant. Total catch of skipjack fish in September 2017 was 51,409 kg, and average of CPUE was 1,658 kg/setting. The highest catch of skipjack was 13,280 kg with sea-surface temperature at 27,4 oC because that temperature is the optimum temperature for skipjack. Temperature is affects to the skipjack distribution.Keywords: Katsuwonus pelamis, MODIS, SSTABSTRAKIkan cakalang (Katsuwonus pelamis) merupakan salah satu jenis ikan yang mempunyai nilai ekonomis tinggi, dan banyak tertangkap di Perairan Aceh. Penelitian ini bertujuan untuk menghitung hasil tangkapan ikan cakalang, membandingkan antara SPL citra dan SPL di lapangan,  dan untuk mengetahui pengaruh SPL terhadap hasil tangkapan ikan cakalang di Perairan Aceh, dengan menggunakan data hasil tangkapan ikan cakalang, SPL citra dan SPL lapangan. Penelitian dilakukan pada bulan September 2017. Metode yang digunakan adalah metode survei dengan 32 titik stasiun lokasi penangkapan dengan melakukan 3 trip pelayaran dengan rata-rata SPL lapangan sekitar 27,24 oC. Adapun SPL pada citra Aqua MODIS sekitar 28,21 oC pada musim peralihan timur – barat. Walaupun terdapat perbedaan SPL lapangan dan citra tetapi tidak terlalu signifikan. Total hasil tangkapan ikan cakalang pada bulan September 2017 sebanyak 51,409 kg, dengan rata-rata CPUE 1,658 kg/setting. Hasil tangkapan ikan cakalang paling banyak tertangkap pada suhu 27,4 0C sebanyak 13.280 kg. Hal ini disebabkan pada suhu tersebut merupakan suhu optimum ikan cakalang karena suhu mempengaruhi distribusi penyebaran ikan.Kata kunci: Katsuwonus pelamis, MODIS, SPL

scholarly journals Analysis of the relationship between chlorophyll-a and sea surface temperature on marine capture fisheries production in Indonesia: 2018

2021 ◽  
Vol 944 (1) ◽  
pp. 012057
Author(s):  
W A L Ningsih ◽  
W A Lestariningsih ◽  
S Heltria ◽  
M H I Khaldun
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Chlorophyll A ◽  
Pelagic Fish ◽  
Sea Surface ◽  
Fish Production ◽  
Marine Fishery ◽  
Low Levels ◽  
The Relationship ◽  
High Fish

Abstract Fishery production in Indonesia is still relatively high, dominated by the marine capture fisheries. Oceanographic dynamics can affect the high and low levels of marine fishery production. Sea surface temperature and chlorophyll-a are oceanographic parameters that are often used as indicators for determining fishing areas, especially pelagic fish which are associated with ocean fertility. This study aims to identify the effect of chlorophyll-a and sea surface temperature (SST) on the production of fish catches in Indonesia: 2018. Data on marine capture fisheries production (skipjack, mackerel tuna, tuna and shrimp) in 2018 were obtained from the Ministry of Marine Affairs and Fisheries (KKP). Data of Chlorophyll-a and sea surface temperature (SST) are satellite observations from Marine Copernicus. The relationship between chlorophyll-a and sea surface temperature (SST) with marine capture fisheries production was analyzed using logistic regression analysis. The results showed that chlorophyll-a significantly affected the yield of skipjack and tuna in Indonesia with coefficients of -5.7066 and -4.3760, respectively. A higher concentration of chlorophyll-a had the possibility to produce high fish production of 0.0033 times than an area with a lower concentration of chlorophyll-a.

scholarly journals Analisis Sebaran Klorofil-A dan Suhu Permukaan Laut sebagai Fishing Ground Potensial (Ikan Pelagis Kecil) di Perairan Kendal, Jawa Tengah

2018 ◽  
Vol 7 (2) ◽  
pp. 67
Author(s):  
Andita Agung ◽  
Muhammad Zainuri ◽  
Anindya Wirasatriya ◽  
Lilik Maslukah ◽  
Petrus Subardjo ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Chlorophyll A ◽  
Rapid Development ◽  
Chlorophyll Concentration ◽  
Pelagic Fish ◽  
Sea Surface ◽  
Fishing Ground ◽  
Purposive Sampling ◽  
Central Java

Perairan Kendal merupakan salah satu kabupaten di Jawa Tengah dengan luas wilayah ± 1.002,23  dan mengalami perkembangan pesat terutama di bidang perikanan. Perairan Kendal adalah salah satu wilayah penyebaran ikan demersal dan pelagis yang cukup potensial di perairan Utara Jawa Tengah. Tujuan penelitian ini untuk memprediksi zonasi fishing ground ikan pelagis  kecil di Perairan Kendal berdasarkan parameter klorofil-a dan suhu permukaan laut. Penelitian ini menggunakan metode kuantitatif, penentuan lokasi pengambilan sampel menggunakan metode purposive sampling. Berdasarkan hasil penelitian diketahui bahwa perairan Kendal memiliki nilai konsentrasi klorofil-a berkisar antara 0.34 – 4.86 mg/  konsentrasi tertinggi di Timur Laut muara sungai Bodri dan di ikuti dengan hasil tangkapan ikan paling banyak yaitu 53 kg. Konsentrasi suhu permukaan laut berkisar 30,5 - 31ᵒC. Perbedaan nilai konsentrasi klorofil-a dan suhu permukaan laut dipengaruhi oleh angin yang berhembus di perairan sehingga diduga mengakibatkan terjadinya proses mixing.  Analysis of Chlorophyll-A Distribution and Potential Sea Surface As Fishing Ground Temperature in Kendal Coastal, Central JavaThe waters of Kendal is one district in Central Java with an area of ± 1.002.23  and experienced rapid development, especially in the field of fisheries. The waters of Kendal is one of the potential demersal and pelagic fish distribution areas in the waters of North Central Java. The purpose of this study was to predict the potential fishing ground of small pelagic fish in Kendal Waters based on the parameters of chlorophyll-a and sea surface temperature. This research uses quantitative method while determining the location of sampling using purposive sampling method. Based on the research results it can be seen that the waters of Kendal has a value of chlorophyll-a concentration ranging from 0.34 - 4.86 mg/   with the highest concentration that is in the Northeast estuary Bodri river and followed by the catch of most fish that is 53 kg. Concentrations of sea surface temperature range from 30.5 - 31ᵒC. Differences in the value of a-chlorophyll concentration and sea-surface temperatures across the waters are influenced by winds that blow in the waters resulting in a mixing process. 

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