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 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 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. 

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

Humboldt penguins outmanoeuvring El Nino

2000 ◽  
Vol 203 (15) ◽  
pp. 2311-2322 ◽  
Author(s):  
B. Culik ◽  
J. Hennicke ◽  
T. Martin
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Chlorophyll A ◽  
Wind Direction ◽  
El Niño ◽  
El Nino ◽  
Southern Oscillation ◽  
Dive Duration ◽  
Sea Surface ◽  
Day Length

We satellite-tracked five Humboldt penguins during the strong 1997/98 El Nino Southern Oscillation (ENSO) from their breeding island Pan de Azucar (26 degrees 09′S, 70 degrees 40′W) in Northern Chile and related their activities at sea to satellite-derived information on sea surface temperature (SST), sea surface temperature anomaly (SSTA), wind direction and speed, chlorophyll a concentrations and statistical data on fishery landings. We found that Humboldt penguins migrated by up to 895 km as marine productivity decreased. The total daily dive duration was highly correlated with SSTA, ranging from 3.1 to 12.5 h when the water was at its warmest (+4 degrees C). Birds travelled between 2 and 116 km every day, travelling further when SSTA was highest. Diving depths (maximum 54 m), however, were not increased with respect to previous years. Two penguins migrated south and, independently of each other, located an area of high chlorophyll a concentration 150 km off the coast. Humboldt penguins seem to use day length, temperature gradients, wind direction and olfaction to adapt to changing environmental conditions and to find suitable feeding grounds. This makes Humboldt penguins biological in situ detectors of highly productive marine areas, with a potential use in the verification of trends detected by remote sensors on board satellites.

scholarly journals STUDY ON CYCLONE INDUCED PHYTOPLANKTON BLOOM IN THE ARABIAN SEA THROUGH GAP-FREE RECONSTRUCTED CHLOROPHYLL-A DATA

2020 ◽  
Vol XLIII-B3-2020 ◽  
pp. 1391-1396
Author(s):  
R. Shunmugapandi ◽  
S. Gedam ◽  
A. B. Inamdar
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Chlorophyll A ◽  
Arabian Sea ◽  
Phytoplankton Bloom ◽  
Suitable Condition ◽  
Sea Surface ◽  
Cyclone Track ◽  
Chl A ◽  
The Impact

Abstract. Ocean surface phytoplankton responses to the tropical cyclone (TC)/storms have been extensively studied using satellite observations by aggregating the data into a weekly or bi-weekly composite. The reason behind is the significant limitations found in the satellite-based observation is the missing of valid data due to cloud cover, especially at the time of cyclone track passage. The data loss during the cyclone is found to be a significant barrier to efficiently investigate the response of chl-a and SST during cyclone track passage. Therefore it is necessary to rectify the above limitation to effectively study the impact of TC on the chlorophyll-a concentration (chl-a) and the sea surface temperature (SST) to achieve a complete understanding of their response to the TC prevailed in the Arabian Sea. Intending to resolve the limitation mentioned above, this study aims to reconstruct the MODIS-Aqua chl-a, and SST data using Data Interpolating Empirical Orthogonal Function (DINEOF) for all the 31 cyclonic events occurred in the Arabian Sea during 2003-2018 (16 years). Reconstructed satellite retrieved data covering all the cyclonic events were further used to investigate the chl-a and SST dynamics during TC. From the results, the exciting fact has been identified that only two TC over the eastern-AS were able to induce phytoplankton bloom. On investigating this scenario using sea surface temperature, it was disclosed that the availability of nutrients decides the suitable condition for the phytoplankton to proliferate in the surface ocean. Relevant to the precedent criterion, the results witnessed that the 2 TC (Phyan and Ockhi cyclone) prevailed in the eastern AS invoked a suitable condition for phytoplankton bloom. Other TC found to be less provocative either due to less intensity, origination region or the unsuitable condition. Thereby, gap-free reconstructed daily satellite-derived data efficiently investigates the response of bio-geophysical parameters during cyclonic events. Moreover, this study sensitised that though several TC strikes the AS, only two could impact phytoplankton productivity and SST found to highly consistent with the chl-a variability during the cyclone passage.

scholarly journals SKIPJACK TUNA IN RELATION TO SEA SURFACE TEMPERATURE AND CHLOROPHYLL-A CONCENTRATION OF BONE BAY USING REMOTELY SENSED SATELLITE DATA

2011 ◽  
Vol 3 (1) ◽  
Author(s):  
Mukti Zainuddin
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Chlorophyll A ◽  
Spatial Dynamics ◽  
Remotely Sensed ◽  
Sea Surface ◽  
Skipjack Tuna ◽  
Important Species ◽  
Physical Environments ◽  
High Catch

Skipjack tuna is an important species targeting by pole and line fishery in Bone Bay. The distribution and abundance of this species tended to aggregate to the preferred bio-physical environments. To describe the short term relationship between skipjack tuna and oceanographic conditions and to visualize the predicted high catch areas, remotely sensed satellite based-oceanographic sea surface temperature (SST) and chlorophyll-a together fisheries data were used. Results indicated that the highest skipjack CPUEs were mainly found in coastal areas of Palopo and Kolaka both in 2007 and in 2009 during the period of study. The high tuna concentrations corresponded well with chlorophyll-a of 0.15-0.40 mg mg-3 and SST of 29.0-31.5 °C. The preferred ranges provide a good indicator for initially detecting potential skipjack fishing grounds. This study suggested that thermal and chlorophyll fronts as well as upwelling may important mechanisms in explaining the temporal and spatial dynamics of skipjack tuna distribution and abundance in Bone Bay.Keywords: skipjack tuna, potential fishing grounds, satellite images and fronts

scholarly journals Global patterns of change and variation in sea surface temperature and chlorophyll a

2018 ◽  
Vol 8 (1) ◽  
Author(s):  
Piers K. Dunstan ◽  
Scott D. Foster ◽  
Edward King ◽  
James Risbey ◽  
Terence J. O’Kane ◽  
...  
Keyword(s):  
Surface Temperature ◽  
Sea Surface Temperature ◽  
Chlorophyll A ◽  
Sea Surface ◽  
Global Patterns
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