Study of Short Mackerel Cath, Sea Surface Temperature, and Chlorophyll -A in the Makassar Strait (original) (raw)
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The Makassar Strait is the major fishing ground for small pelagic fish, on South Sulawesi, Indonesia using both commercial fishing vessels and boats with traditional fishing gear. Though small pelagic fish is one of dominant commercial food fish in South Sulawesi, the annual Catch per Unit Effort (CPUE) decreased from 6163.3 tons in 2007 to 5148.7 tons in 2011. The purpose of this research was to forecast the fishing ground of small pelagic fishes employing Moderate Resolution Imaging Spectroradiometer (MODIS) satellite images in Makassar Strait territory with the study interest of 3°S to 5°S and 118°E to 120°E. Fishing data collected from the fishermen include fishing locations, catch, sea surface temperature, and chlorophyll concentrations. To determine the relationship between catch and oceanographic parameters, a linear regression analysis was employed. We also examined sea surface temperature (SST) and Chlorophyll-a concentration field data vs. MODIS satellite data. The result showed that SST and Chlorophyll distributions had a close relationship with the distribution of fishing ground of small pelagic fishes. The fishing ground tended to spread on the waters with the SST ranged from 26°C to 30°C and the Chlorophyll concentration ranged from 0.3mg/m3 to 2.8 mg/m3. By using MODIS satellite images, the fishermen may be easier to find the potential fishing grounds of small pelagic fishes in Makassar Strait.
2020
The dynamics of oceanography affect the existence and distribution of fishes. Fishes will look for suitable water conditions for their living habitat. Changes in oceanographic parameters such as temperature, salinity, water fertility, weather, and other parameters are factors associated with it. The SST and Chl-α were the main indicators in determining the presence of fishes, especially for pelagic fishes. Mackerel is one of the prominent commodities in the northern waters of West Java. Changes in water conditions globally also affect the conditions in the territorial waters. This is of course also affecting the existence of mackerel. Therefore, it is necessary to do a study to find out the range of SST and Chl-α values to estimate of mackerel seasonal abundance and distribution in the northern waters of West Java. This research uses an observation method with a combination of remote sensing approaches and filed data. The data used to result from the acquisition of Aqua MODIS satell...
E3S Web of Conferences
Arafura Sea is one of the waters in the eastern region of Indonesia that is rich in marine and fisheries potentials because of its fertile conditions which is suitable for fishing ground. One of the fish resources which have important economic value at the Arafura Sea is big pelagic fish such as Mackerel. Thus this study aims to determine the spatial and temporal distribution of Mackerel in the Arafura Sea based on fishing boat coordinate data, to know the distribution of chlorophyll-a concentration and SST from MODIS satellite data in the Arafura Sea and to determine the correlation of chlorophyll-a and SST to the Mackerel catch distribution. This study was conducted in December 2016 until February 2017 in the Arafura Sea, image data analysis of MODIS level-3 conducted at the Laboratory of Oceanography FPIK UNDIP. The data used are Mackerel catch data, the Chlorophyll-a data and SST from MODIS satellite from June to August 2015. The results of this study showed that the distributio...
Indian mackerel has been supporting commercial fisheries In South Sulawesi. The knowledge about oceanographic parameter is very support fishermen activity for detection of the Indian mackerel position in the sea. The objective of the study was to analysis some oceanograpphyc factors relate to fishing zone potency of indian mackerel in Flores Sea South Sulawesi. The characteristic of fishing ground was identified during fishing operation of purse seine. The position of fishing operation was identified by using GPS. Abundance of indian mackerel was counted from Catch Per uni Effort of purse seine. Sea Surface Temperature was detected by using satellite of TRMM (Tropical Rainfall Measuring Mission). The concentration chlorophyll-a was estimated by using the satellite of The Orbview-2 SeaWiFS. CPUE in the September and October is highest This is related to the highest chlorophyll-a 8 mg m -3 and was also supported by the SST 26,6 o C. From July to October there was upwelling process in southern part of Sulawesi that generate increasing chlorophyll-a. Then the CPUE of Indian mackerel also increase, Data SST and Chlorophyll-a from satellite could be used as indicator for detecting of the distribution and abundance of Indian mackerel.
Jurnal Airaha
The West Sumatera Waters has the potential to be developed for capture fisheries. This potential is utilized through the application of local knowledge for better fishing operations. Fishermen in West Sumatera in determining fishing ground still use the traditional method, namely using previous experience even though on vessels of > 40 GT and it has been assisted by the fish finder. This study aims to analyze the distribution of sea surface temperature (SST) and chlorophyll-a through Aqua Modis satellite imagery interpretation and analyze its effect on boat lift catch from December 2019 to March 2020. The remote sensing technique via satellite is an efficient method to determine the distribution of sea surface temperature and the distribution of chlorophyll-a. Data from satellites is very helpful in determining temperature and chlorophyll-a. The results obtained are in December 2019 to March 2020 SST distribution ranged from 27 to 30.9°C with dominant SST fluctuating every mont...
E3S Web of Conferences, 2021
The fishing ground is identical and closely related to chlorophyll-a abundance in the waters, associated with its fisheries potential. This research has been conducted to determine the concentration and distribution of chlorophyll-a in the seas, especially in the Fisheries Management Area (FMA) 712 encompassing the Java Sea. The analysis used monthly time-series data collected from the satellite imagery over the last 11 years, taken through the ERDDAP website. The mean concentration of chlorophyll-a in the study area was 1.13 mg/l in June 2013. Based on 11 years of data processing, it can be concluded that the highest concentration of chlorophyll-a occurred in the west monsoon season from November to April, where increased rainfall caused the nutrient wash from terrestrial to the open waters. The lowest chlorophyll-a concentration happened in the east monsoon season from April to November, where the dry season arrived. The existence of pelagic fishes in FMA 712, such as Sardinella L...
E3S Web of Conferences, 2022
Utilization of potential fishery and marine resources is still not maximally used by fishermen. Sea surface temperatures and the spread of chlorophyll-a through remote sensing systems can be used as potential fishing zones. This study aims to determine potential fishing zones using geographic information systems through the distribution of sea surface temperatures and the value of chlorophyll-a concentrations in Aceh Besar waters which is expected to improve the sustainability of fishing efforts. This research was conducted in January-December 2019 using geographic information system by extracting from Aqua-MODIS satellite image with resolution of 4 km and sea surface temperature overlay method with chlorophyll-a concentration. The results found the highest sea surface temperature value was in April at 31.62°C and the lowest temperature was in December at 28.45°C. The highest average chlorophyll-a concentration in Aceh Besar waters was 1.53 mg/m3 in December and the lowest concentra...
Proceeding of 12th Biennial Conference of Pan Ocean Remote Sensing Conference (PORSEC 2014) , 2014
Southeast Indian Ocean, particularly in the Southern waters off Java-Bali was identified as potential fishing ground of bigeye tuna (Thunnus obesus). We used satellite remote sensing data of Sea Surface Temperature (SST) and Sea Surface Chlorophyll (SSC) and daily fish catch data from PT Perikanan Nusantara, Bali during 2006-2010. To understand the preferred habitat of bigeye tuna in the current study area, the relationship between SST, SSC and the number of bigeye tuna are important to investigate. To understand the relationship between SST, SSC and bigeye tuna, fisheries data classification and polynomial regression were used. This study considers to evaluate which parameter will influence the abundance of bigeye tuna, and to determine the range value of each parameter that is optimum for bigeye tuna. The results clearly show that both of SST and SSC, which derived from satellite observation confirmed a strong relationship with the abundance of bigeye tuna. Statistical analysis showed the optimum of SST for bigeye tuna is less than 29.1°C and more than 27.4°C. In addition, the optimum value of SSC was 0.055 to 0.175 mg m-3. Moreover, meteorological data and ocean dynamic analysis seems to be other parameters that affect the abundance of bigeye tuna. Keywords: Bigeye tuna, SST, SSC, remote sensing, Southern waters off Java-Bali, Indian Ocean
Advances in social science, education and humanities research, 2023
The decline in fish catches in 2018-2020 becomes a problem experienced by fishermen in the southern waters of Java island. This affects fishermen whose livelihoods are from marine products. From these problems, the purpose of the research is to analyze the fishermen's catches in the southern waters of Java island in 2018 and 2020 based on chlorophyll-a fertility and sea surface temperature (SST), and supported by upwelling phenomena and determination of Potential Fishing Zones. The method used is secondary data analysis taken from MODIS Level 3 imagery to visualize water conditions. The concentration of chlorophyll-a in the eastern season of 2018 had an average of 0.4-0.6 mg/m 3 with a sea surface temperature of 25.9-27.8°C. In 2020, there was a decrease by an average of 0.3-0.4 mg/m 3 with a sea surface temperature of 26.7-28.3°C. This is proved by all significance values of paired t-test less than 0.005. That is, there is a significant difference between both periods. In 2018, the widest strong upwelling was in July with an area of 13,0723.94 km 2. In 2020, it occurred in June with an area of 41,515.86 km 2. The most potential fishing zones of 2018 were in August as many as 254 points and in 2020 in July 154 points. High chlorophyll-a with low sea surface temperature levels, strong upwelling areas, and dominant potential fishing zones are mostly found in areas proximate to the coast compared to those further away from the coast.
2005
Exploration of fishery resources using remote sensing technique is based on the principle of identification of feeding grounds where fish tend to accumulate. It has been proven that thermal or colour gradients revealed by oceanic fronts indicate sites of high biological productivity. Some constraints in using SST (sea surface temperature) gradients for locating fish in the Indian waters were experienced such as the narrow range of SST and difficulty in detecting gradients, particularly in summer. Two approaches were developed and validated in the coastal waters of the west coast of India. In the first approach, SST contours (using NOAA AVHRR) were overlaid on chlorophyll image (from IRS P4 OCM) of corresponding date. This enabled identification of common frontal structures from the composite product. These sites were selected as priority fishing zones for the trial forecasts. Besides, ocean colour images were found to provide information on additional productive areas not found from SST images alone and hence, a second approach made exclusive use of patterns of ocean colour. Merits of ocean colour arose from penetration of visible radiation below surface up to one attenuation depth and from the frequent repeat cycle of the satellite data. The improvements with use of ocean colour include capability of prediction of oceanic features, exploitation of knowledge of the history of the features, identification of biological fronts in the deep sea waters etc. Also, such features as non-toxic winter blooms and internal waves were identified in the deep waters of the Northern Arabian Sea using chlorophyll images and the response of fish to these features was studied. This paper highlights how ocean colour improves our ability to locate areas of high abundance of fish. Because the time taken in information extraction from satellite data is a critical factor, on-line reception of OCM and AVHRR data was arranged. Fishery forecasts were generated using the integrated approach within 24 hours of satellite over pass, and disseminated to collaborating agencies for follow up fishing operation. The validation experiment for the forecasts was carried out for three years covering different seasons during 1999-2001. It was found that the forecasts were superior in terms of rate of success and magnitude of fish catch. Summary of feedback received indicated 70-90 % success rate (reliability) of the forecasts and 70-200 % increase in catch. In comparison with this, earlier SST-based approaches for the forecast yielded 50 % success rate and 40-50 % increase in catch. The integrated approach is currently being used to generate nation-wide fishery forecasts. In addition to this, cost-benefit analysis for the satellite fishery forecasts was also attempted. It was observed that the benefit:cost ratio increased from 1.27 to 2.12 for bottom trawling and 1.3 to 2.14 for gillnet fishing with the use of satellite forecasts.