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INDONESIA
Jurnal Segara
Published by Kementerian Kelautan dan Perikanan RI
ISSN : 19070659     EISSN : 24611166     DOI : -
Core Subject : Science, Social,
Earth & Planetary Sciences Environmental Science Materials Science & Nanotechnology
Jurnal SEGARA (p-ISSN: 1907-0659, e-ISSN: 2461-1166) adalah Jurnal yang diasuh oleh Pusat Riset Kelautan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan (BRSDMKP), Kementerian Kelautan dan Perikanan – KKP, dengan nomenklatur baru Pusat Riset Kelautan, Badan Riset dan Sumber Daya Manusia Kelautan dan Perikanan, KKP dengan tujuan menyebarluaskan informasi tentang perkembangan ilmiah bidang kelautan di Indonesia, seperti: oseanografi, akustik dan instrumentasi, inderaja,kewilayahan sumberdaya nonhayati, energi, arkeologi bawah air dan lingkungan.
Arjuna Subject : -
Articles 191 Documents
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STUDY OF SEA WATER QUALITY BASED ON PHYSICAL-CHEMICAL PARAMETERS IN THE WATERS OF THE MALAKA STRAIT Djunaidi, Djunaidi; Widagdo, Aris; Kelana, Perdana Putra; Pramesthy, Tyas Dita; Arkham, Muhammad Nur; Haris, Rangga Bayu Kusuma; Hutapea, Roma Yuli F; EY, M. Habib
Jurnal Segara Vol 19, No 1 (2024): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v19i1.14243

Abstract

It is feared that the high level of human activity in the coastal areas of Dumai City and Bengkalis City will have a polluting impact on water quality conditions. Therefore, to preserve coastal and marine functions, it is necessary to manage the quality and control of sea water pollution for present and future purposes as well as ecological balance. This research aims to determine the water quality of Dumai City and Bengkalis City, focusing on the concentration of several physical and chemical water parameters listed in the sea water quality standards for marine biota. Water quality sampling was carried out in May-August 2023 at 12 research stations, then the results were compared with sea water quality standards for marine biota. The research results show that the parameters that still comply with sea water quality standards for marine biota based on the Decree of the Minister of the Environment No. 51 of 2004 are temperatures in the range of 28.7-30.8˚C and an average value of 29.45˚C., pH ranged from 6.4–7.2, with an average value of 6.9 and dissolved oxygen (DO) ranged from 5.0 – 5.9 mg/l, with an average of 5.34 mg/l. Meanwhile, the parameters that do not comply with quality standards are low brightness ranging from 0.40 m-0.58 m with an average brightness of 0.47 m and salinity ranging between 22-28 ppt, with an average salinity of 24 ppt
IoT Sea Level Monitoring: A Study on the Development and Field Testing Kusuma, Hollanda Arief; Akbar, Muhammad Aris; Suhendra, Tonny
Jurnal Segara Vol 19, No 1 (2024): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v19i1.12352

Abstract

The measurement of sea level is important in oceanography, as it provides critical information about the ocean environment, including tides, currents, and water temperature. This study aimed to develop an IoT-based sea level monitoring device that can accurately measure sea level and transmit the data in real time. The device consisted of various components: an ESP32 Microcontroller, a GSM Module, an MS5803-14BA sensor, and a battery. The components were assembled on a PCB board and placed inside a waterproof box to protect the electronics from the ocean environment. The field test was conducted for 17 hours at the Tanjungpinang Class 1 Navigation Office Port, and the data was monitored through the Ubidots platform. The results showed that the device accurately measured sea level, with an RMSE value of 0.69 cm and an accuracy rate of 99.47%. However, the field test also revealed data transmission issues, with 18.81% of the data not being sent to the server. This low data transmission rate may have been due to low RSSI levels and issues with operator signal quality. Further research is needed to understand the reasons behind these data losses and to improve the device's overall performance. This study demonstrated the feasibility of using an IoT-based sea level monitoring device to accurately measure sea level and transmit the data in real time. It provides valuable information for further development and improvement of sea level monitoring systems.
ANALYSIS OF THE LENGTH AND WEIGHT RELATIONSHIP OF NANGKA SEED FISH (Upeneus vittatus) CAUGHT IN THE WATERS OF IMAM LASTORI PORT, MOROTAI ISLAND DISTRICT Alwi, Djainudin; Wahab, Iswandi; Safar, Fitriyanti; Rahman, Irfan Hi. Abd
Jurnal Segara Vol 19, No 1 (2024): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v19i1.14187

Abstract

Excessive utilization (over-exploited) will have an impact on reducing the productivity of resources including jackfruit seed fish (Upeneus vittatus). This impact causes changes in abundance, productivity and community structure, such as changes in species dominance, size spectra and catch, which results in depletion of stocks and ends in the extinction of this fish population. So far there is no data and information regarding the biological aspects of the morphology of the use of jackfruit seed fish (Upeneus vittatuss) in Morotai Island Regency. The aim of this research is to analyze the relationship between length and weight of jackfruit fish (Upeneus vittatus) caught in the waters of Imam Lastori Harbor, Morotai Island Regency. Data collection was carried out directly in the field (in situ) by measuring the body length and weight of jackfruit seed fish (Upeneus vittatus). The data obtained were analyzed using simple linear regression analysis. The results of a simple linear regression analysis between the total length and weight of the jackfruit fish (Upeneus vittatus) caught in the waters of Imam Lastori harbor obtained the equation: W (weight) = 1.30 x L (length) = 1.35 indicating that for every 1 increase .30 gram units of the weight of jackfruit seeds will increase 1.35 cm units of the length of kuniran jackfruit seeds (Upeneus vittatus). The b value (exponent) of 1.35 indicates a negative allometric growth pattern. This is in accordance with the criteria for the length-weight relationship if the b value <3, then the growth form is negative allometric). Meanwhile, the determination value (R2) obtained was 0.63, meaning that 63% of the increase in fish length was due to the increase in weight (weight) of jackfruit fish (Upeneus vittatus) while 37% was caused by other factors. 
COMPARISON OF GROWTH OF MANGROVE TYPES OF RHIZOPHORA SPP USING POLYBAG AND HYDROPONIC MEDIA IN KARIMUNJAWA NATIONAL PARK, CENTRAL JAVA Pasaribu, Roberto Patar; Djari, Anthon Anthonny; Rahman, Abdul; -, Aris Kabul
Jurnal Segara Vol 19, No 1 (2024): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v19i1.12702

Abstract

Mangroves are one of the ecosystems that grow in places that are influenced by the around the coast and river mouths. The technique of planting and maintaining mangrove seedlings varies from place to place depending on the media and conditions in the field. The purpose of this study was to compare the growth of mangrove species Rhizophora spp on two different nursery media, namely polybag and hydroponic media. This research was conducted in Karimunjawa National Park, Central Java, with an experimental research method. The results showed the growth rate of mangrove seedlings using polybag media was an average of 0.64cm per fortnight, while with hydroponic media it was 0.44cm per fortnight. The first leaf growth with polybag media occurred in the fifth week after planting while for hydroponic media the leaves grew in the sixth week. The survival rate on polybag media is 92.31%, while in hydroponic media it is 84.61%
DISTRIBUTION OF MOLUSC TYPES (Gastropoda and Bivalves) IN SEAMUS IN THE WATERS OF TANJUNG SALEH VILLAGE, MOROTAI ISLAND DISTRICT Nurafni, Nurafni; Wahab, Iswandi; Padoma, Ummi Kulsum
Jurnal Segara Vol 19, No 1 (2024): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v19i1.14191

Abstract

The vast seagrass field allows the number of biota that live associated with seagrass. One of the wealth of marine resources that is often found is mollusks such as snails, shellfish, octopus, cuttlefish and squid. Mollusks are found in coastal areas with seagrass beds as their habitat. One of the most commonly found mollusk groups in Bere Bere village waters is gastropod and bivalvia. Research Objectives To determine the distribution of mollusks in the waters of Bere-Bere Village. This study was conducted in October 2021 to January 2022 located in the waters of Bere-Bere Village, North Morotai District, Morotai Island Regency. Data collection uses the quadratic transect method to identify mollusks (gastropods and bivalvia) that are found in each square. The transect rope is pulled perpendicular to the sea along 50 m during the receding sea water starting from the zero point (0), to the point of 50 m, the square distance is 10 m while the transect distance is 25 m, while the distance between the station is 50 m, then the square is placed on Every distance of 10 m along the transect that can represent the locations that have gastropod and bivalvia samples. Organism found along the transect, in the squares observed and then identified using an identification book. Field work practices were found 11 types of gastropods (Conus Gladiator, Conus Littyus, Trochidae sp, Cerithiidae sp, Canarium sp, Muricodrupa fenestrata, Vexillum sp, Strombus Campbelli, Strombus Campbell , Conus Episcopatus, Conus Sulcatus, Conus Pennaceus) and 3 types of Bivalvia (Lambis Lambis, Pinna Muricata, Diloma Radula) which are spread on three stations in the waters of Bere-Bere Village.
GROWTH RATE OF ACROPORA TENUIS CORAL WHICH IS TRANSPLANTED ON DIFFERENT ATTACHMENT MEDIA Budikusuma, R Arief; Nurhayati, Atikah; Pangaribuan, Nurmala
Jurnal Segara Vol 19, No 1 (2024): April
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v19i1.13927

Abstract

Coral transplantation is the activity of cultivating/breeding coral colonies using the fragmentation method. Several techniques have been used in transplant activities, but knowledge of the right transplantation technique is needed so the activities can run well. This study aims to determine the effect of different types of substrate and attachment media used on the growth rate and survival of Acropora tenuis corals transplanted into three attachment media at Karang Malang beach at a depth of two meters. The research was carried out for four months, March-June 2023 through field research using a randomized block design method with two factors, namely the type of substrate used (cement, coral, clay, glass bottles, cans) and different attachment media (control, cement, epoxy). The results of the analysis showed that the use of cement as a fixing medium was more effective and affected coral growth and the growth rate of Acropora tenuis than epoxy and without adhering media. The highest growth rate was found in cement attachment media, which was 0.62 cm/month, and the lowest in the method without attachment media, namely 0.45 cm/month. While the epoxy sticking method is 0.51 cm/month. The survival rate for cement attachment media was 96%, epoxy adhesion media was 88% and treatment without attachment media/control was 76%.
CHEMICAL CHARACTERISTICS OF ACID-SOLUBLE COLLAGEN FROM SEA URCHIN SHEEL Arsyad, Muh Ali; Rusli, Arham; Rosmaladewi, Rosmaladewi
Jurnal Segara Vol 19, No 2 (2024): August
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v19i2.14673

Abstract

Shells, a by-product of the sea urchin processing industry. The proportion of shells up to 85% is more widely used as a feed additive. This research aims to extract collagen from sea urchin shells using acetic and lactic acid (0.25-0.5 M). The acid-soluble collagen was then analyzed for its functional groups using the Fourier transform spectroscopy (FTIR) method. The higher the acid concentration used in extraction, the higher the yield of collagen produced. The highest collagen yield was obtained at a concentration of 0.5 M acetic acid. FTIR analysis of acid-soluble collagen showed functional of amide A (3351.64), B (2964.00), I (1663.25), II (1558.16), and III (1244.97) (cm-1). The results of functional group identification show that the acid-soluble collagen from sea urchin shells is in accordance with collagen standards.
SUSTAINABLE FISHERIES MANAGEMENT BASED ON SYARIAH BIOECONOMICS MODEL Wahyudin, Yudi; Mahipal, Mahipal
Jurnal Segara Vol 19, No 2 (2024): August
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v19i2.14960

Abstract

This article aims to provide a new perspective and paradigm in sustainable fisheries management by introducing and integrating sharia principles and approaches into the fisheries bioeconomic model. The initial model is carried out by introducing ZIS parameters into the Gordon-Schaefer fisheries bioeconomic model. The amount of ZIS can provide encouragement to build and develop a sustainable sharia fisheries bioeconomic management model. Factors that influence the success of fishing gear (q) to be able to catch fish, the ability of the environmental carrying capacity (K) to be able to maintain fish reproduction and growth, and the ability of the fish themselves to grow and develop in achieving a certain biomass (r) are something that is essentially desired as a gift from the Almighty on the basis of the efforts of His servants to fulfil the ZIS command. In addition, the income of His servants (fishermen) which is influenced by the price (p) of fish and the efficiency of the cost per unit of catch (c) that must be spent to obtain fish is an inseparable part of the existence of income which is also a gift from Allah. The five parameters of the sharia bioeconomic of fisheries (r, q, K, p, c) which are influenced by the presence of the ZIS factor are the fortune and way of Allah SWT to bestow blessings, gifts, and welfare to His servants (fishermen) who have fulfilled ZIS. This sustainable sharia bioeconomic management model of fisheries is based on the paradigm and perspective of the community (fishermen) in carrying out fishing through the fulfilment of ZIS maximally and sustainably which is carried out by always hoping for the pleasure and blessings of Allah SWT, it is hoped that it can change the lives, lives and livelihoods of the fishing community.
ANALYSIS OF COASTAL AREA MANAGEMENT THROUGH A COMMUNITY-BASED APPROACH IN PESAWARAN DISTRICT Nugraheni, Irma Lusi; Eka Y R, Riyantika; Pratiwi, Dinar
Jurnal Segara Vol 19, No 2 (2024): August
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v19i2.10137

Abstract

 Pesawaran Regency is a buffer zone for the capital city of Lampung Province which has a fairly wide and potential coastal area. With a variety of rich biodiversity and environmental services provided, coastal and marine resources have high economic and ecological value. In order to ensure the sustainability of these resources, their management must be carried out in a planned and integrated manner and be able to provide the maximum benefit to all stakeholders, especially coastal communities, and minimize impacts and conflicts that could potentially occur. The method used in this study is literature study. The results show that coastal communities in Pesawaran Regency have a fairly active role in the management of coastal areas.
STUDY OF SHORELINE CHANGE OF TABUHAN ISLAND IN WONGSOREJO DISTRICT BANYUWANGI REGENCY USING GOOGLE EARTH IMAGE Rizqiyanto, Firdaus Achmad; Mauludiyah, Mauludiyah; Maisaroh, Dian Sari
Jurnal Segara Vol 19, No 2 (2024): August
Publisher : Politeknik Kelautan dan Perikanan Dumai

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.15578/segara.v19i2.11180

Abstract

The beach is an area that often experiences changes in shape that can occur quickly or slowly depending on those who influence it, both due to natural and artificial factors. Tabuhan Island is one of the islands that has the problem of shoreline changes. This study aims to determine the physical conditions of hydrooceanography and changes in the coastline of Tabuhan Island. Hydrooceanographic physical parameters include tides, currents, winds, waves and Total Suspended Solids (TSS). The study of changes in the coastline of Tabuhan Island uses the overlay method using Google Earth images in 2006, 2011, 2016 and 2021. The overlay method is a method of overlapping images from the old to the newest. The results show the waters of Tabuhan Island have a mixed tidal type with a double daily trend, the current speed ranges from 0.2760 m/s to 0.9023 m/s from north to south and the wind has a speed of 0-17 knots dominantly from south to north and southeast to northwest. The waves have a maximum height of 2.6 m and a minimum of 0.01 m and the highest Total Suspended Solid (TSS) value is 198.9 mg/L and a minimum of 110.3 mg/L. The results of the study show the area Tabuhan Island has reduced its area from 67,313.4 m² to 50,028 m²mwith an annual evenly of 850.9 m² in the period 2006 – 2021. The abrasion value that occurs is 22,423.3 m² happening in south and west and the accretion is 5,128.9 m² happening in the north Tabuhan Islands.

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