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ILMU KELAUTAN: Indonesian Journal of Marine Sciences
Published by Universitas Diponegoro
ISSN : 08537291     EISSN : 24067598     DOI : -
Core Subject : Science,
Earth & Planetary Sciences
ILMU KELAUTAN: Indonesian Journal of Marine Sciences (IJMS) is dedicated to published highest quality of research papers and review on all aspects of marine biology, marine conservation, marine culture, marine geology and oceanography.
Arjuna Subject : -
Articles 743 Documents
 67   68   69   70   71 
Potential of Sea Cucumbers as Fuctional Foods Wodi, Stevy Imelda Murniati; Dewi, Eko Nurcahya; Riyadi, Putut Har; Pringgenies, Delianis; Dolorosa, Roger G.
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 1 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.1.97-103

Abstract

Sea cucumbers have great potential for managing water resources because they have filter feeder properties that can clean water from harmful substances. Apart from that, sea cucumbers also contain active compounds which have properties as functional foods and can help prevent cancer. Samples of sea cucumbers were collected from Karimunjawa, Central Java, and Surabaya. The research included tests for bacteria, chemicals, and heavy metals on dried sea cucumbers, as well as amino acid analysis. Two species of sea cucumbers were identified: Holothuria atra and Stichopus variegates. H. atra had a higher amino acid content and the highest collagen content among all the amino acids (14,600mg.100g-1). Both types of sea cucumber samples contain amino acids that have anti-inflammatory, antioxidant, and anticancer properties. This is due to their content of saponins, tannins, flavonoids, steroids, and terpenoids, which are beneficial for health. Additionally, S. variegates has been found to have antibacterial activity against Staphylococcus aureus and Escherichia coli bacteria. The amino acid analysis of S. variegates shows the presence of sulfate and alanine compounds, which are not found in H. atra. Research has shown that sea cucumbers can be consumed as supplements or additional food to support health and prevent various diseases, including cancer. The use of sea cucumbers as functional food ingredients also has the potential to manage water resources sustainably. In conclusion, H. atra and S. varigatus sea cucumbers have great potential for managing water resources for functional food and cancer prevention efforts. Their high content of amino acids and other phytochemical compounds makes them a good choice for development as functional food ingredients.
Trend of Halmahera Eddy and Mindanao Eddy Martono, Martono; Santoso, Heru; Nurlatifah, Amalia; Felix, Mark Jayson
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 2 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.2.261-272

Abstract

Global warming, due to increasing greenhouse gases, has increased the frequency of El Niño Southern Oscillation events and influenced ocean dynamics. This research determined the trends of Mindanao Eddy’s and Halmahera Eddy’s over 28 years (1993–2020). The data used in this research consist of sea surface currents, surface wind, sea surface height, and NIŇO3.4 index. Determination of eddy currents was done using the Automated Eddies Detection method. The results showed that the Asian-Australian monsoon and El Niño Southern Oscillation events influence the characteristics of the Mindanao Eddy and Halmahera Eddy. During the Asian monsoon, the position of the Mindanao Eddy and Halmahera Eddy shifts southward, while during the Australian monsoon, it shifts northward. During El Niño, the position of the Mindanao Eddy turns eastward with a smaller diameter, but the position of the Halmahera Eddy does not shift. Conversely, during La Niña, the position of the Halmahera Eddy turns northwestward with a smaller diameter, while the position of the Mindanao Eddy remains unchanged. The shift of the Mindanao Eddy during the El Niño event is closely related to the weakening of the North Equatorial Current and the strengthening of the North Equatorial Countercurrent. On the other hand, the shift of the Halmahera Eddy during the La Niña event is related to the strengthening of the South Equatorial Current as a source of water masses for the New Guinea Coastal Current. The velocity of the Mindanao Eddy and Halmahera Eddy experienced an increasing trend in 1993-2020.
Morphological and Genetic Diversity of Mangrove Species Ceriops tagal (Perr.) C.B. Rob. Around Java Island Sukmarani, Dhuta; Proklamasiningsih, Elly; Susanto, Agus Hery; Ardli, Erwin Riyanto; Permadi, Jefri; Palimirmo, Flandrianto Sih
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 28, No 4 (2023): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.28.4.334-350

Abstract

Ceriops tagal (Perr.) C.B. Rob can be found in Baluran National Park, Kepulauan Seribu National Park, Karimunjawa National Park, and Segara Anakan Cilacap in Java and its surrounding areas. These locations have different demographics and environmental conditions. Plant species found in different geographical areas have varied genetic structures and morphological traits as a result of their adaptability to their environment. The goal of this study is to evaluate the morphological and genetic differences between the four populations of C. tagal in Java and its surroundings. Internode length, leaf length, leaf width, petiole length, and leaf area were the morphological characters used. The Internal Transcribed Spacer (ITS) region is used as a molecular marker. The UPGMA dendogram was used to analyze the morphological similarity, and multidimensional unfolding analysis was used to determine which character most determined the grouping. Mega X software was used to analyze genetic variation using the neighbor-joining approach, while Arlequin 3.5 software was used to estimate genetic variation within and among populations. The results of this study showed that the population of Baluran National Park has features or is distinct from the other three populations based on morphological and genetic characters; this could be because of variations in geographic conditions, and that population diversification was aided by a combination of genetic and physical divergence, restricted gene flow, and local adaptation.
Inherent Optical Properties Attenuation Coefficient Modelling for Optical Shallow Water in Kepulauan Seribu of Jakarta, Indonesia Setiawan, Kuncoro Teguh; Rosid, Mohammad Syamsu; Manessa, Masita Dwi Mandini; Suardana, A.A. Md. Ananda Putra; Adi, Novi Susetyo; Winarso, Gathot; Osawa, Takahiro; Asriningrum, Wikanti; Supardjo, Harsono
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 2 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.2.222-232

Abstract

Technology to obtain bathymetric information has become necessary considering the length of the coastline and the many islands owned by Indonesia. Measurement technology using multi-beam and single-beam echo sounders is still an alternative to producing bathymetric information. In shallow water, using echo sounders has constraints and limitations, such as being time-consuming, costly and prone to equipment damage. Remote sensing technology is an alternative to obtaining bathymetric information in shallow waters. Bathymetric modelling with analytical and semi-analytic models from satellites requires attenuation coefficients. Therefore, attenuation coefficient models are essential for satellite data. Attenuation coefficient studies using inherent optical properties (IOP) parameters have not yet been studied to determine Kepulauan Seribu bathymetry, Jakarta, Indonesia. The IOP modelling is determined by absorption and backscatter parameters. Chlorophyll-a Total influences these parameters: Total Suspended Matter (TSM) and Coloured Dissolved Organic Matter (CDOM). This study was performed to determine the attenuation coefficient model using multispectral remote sensing in the Kepulauan Seribu and applied five approaches to determining the attenuation coefficient via IOP: the Gordon, Kirk, Morel, Lee and Simon models. The five models' IOP attenuation coefficient results were compared to the in-situ attenuation coefficient value and evaluated. The results of IOP attenuation coefficient modeling of multispectral remote sensing based on the condition of local water parameters is Kd(λ) = 1.4369 ((a(λ) + b(λ)) / Cos θ) + 0.072. based on the modified Gordon method, The modelling results were obtained with an accuracy of 0.98 determination coefficient (R2) and 0.029 Root Mean Square Error (RMSE).
In vivo Anti-arthritic Activity of Soft Coral Lobophytum sp. From Southeast Sulawesi in Freund’s Complete Adjuvant Induced Arthritis Fristiohady, Adryan; Nurpajriani, Nurpajriani; Malaka, Muhammad Hajrul; Ilyas Y, Muhammad; Pascayantri, Asniar; Haruna, Lidya Agriningsih; Purnama, La Ode Muh. Julian; Asasutjarit, Rathapon; Sahidin, Idin; Yodha, Agung Wibawa Mahatva
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 3 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.3.385-392

Abstract

Rheumatoid arthritis (RA) is a systemic, progressive, chronic autoimmune inflammatory disease that affects tissues, organs, and damages synovial joints. The RA can be treated with DMARD (disease modifying anti rheumatic drugs), such as methotrexate. However, the use of this drug long-term can cause side effects. Soft coral Lobophytum sp. has secondary metabolite compounds such as flavonoids, alkaloids, and terpenoids which has an anti-inflammatory activity, which beneficial for anti-rheumatoid arthritis agent. This study aims to determine the potential of anti RA in Lobophytum sp. using in vitro and in vivo. The anti-inflammatory assay for anti RA in vitro was performed by stabilization of human red blood cell (HRBC) membrane. In addition, anti RA was performed in arthritis model mice by induction of complete Freund’s adjuvant (CFA) by administering LEA once daily orally for 15 days. It was found that the ethyl acetate of Lobophytum sp. (LEA) reduced the haemolysis and increased the stability of HRBC membrane. Furthermore, LEA also showed anti RA by decreasing the edema in mouse paw at dose of 50 mg.kg-1 BW (LEA50), 100 mg.kg-1 BW (LEA100), and 200 mg.kg-1 BW (LEA200), respectively with 2.5 mg.kg-1 BW of methotrexate as positive control (C+) with P<0.05. Moreover, LEA200 demonstrated highest efficacy and showed no significant different with C+ (P>0.05). In conclusion, our research has shown that LEA has anti-inflammatory for treatment of rheumatoid arthritis from in vitro and in vivo studies.
Unveiling the DNA Barcoding of Threadfin Breams (Nemipteridae) at Oeba Fish Landing Site and Oesapa Fish Market in Kupang, East Nusa Tenggara Wora, Umbu Domu; Wijayanti, Diah Permata; Widowati, Ita; Ginzel, Fanny Iriany; Nursalim, Nining; Kholilah, Nenik; Bachtiar, Muggi
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 2 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.2.170-180

Abstract

Threadfin breams (Nemipteridae) are demersal fish species that constitute a significant catch for East Nusa Tenggara fishermen at the Oeba Fish Landing Site and Oesapa Fish Market, where they are landed year-round. Over the years, there has been a noticeable increase in the capture of threadfin breams, raising concerns about the potential impact on their genetic diversity. The ongoing trend could affect the region’s overall population structure of threadfin breams. This study addresses the need to identify threadfin breams in the landing above sites of threadfin breams through molecular analysis of mtDNA COI. The research involved the examination of 24 samples obtained from the Oeba Fish Landing Site and Oesapa Fish Market. The analysis revealed the presence of five distinct threadfin bream species: Nemipterus hexodon, N. japonicus, N. zysron, N. aurora, and Pristipomoides typus. The genetic distance between individual threadfin breams ranged from 0-0.8%, indicating a relatively close genetic relationship within the population. Also, phylogenetic tree reconstruction further delineated five distinct clades based on the species obtained from the samples. Given these findings, the study emphasizes the importance of sustainable threadfin bream capture to preserve genetic diversity. The results underscore the need for ongoing monitoring and management strategies to ensure the threadfin bream population’s long-term health and stability. Additionally, the study suggests that a more in-depth analysis of genetic diversity and the environmental factors influencing this species is warranted for a comprehensive understanding and effective conservation measures.
The Dynamics and Water Quality Status of a Tropical Coastal Lake in Anak Laut Lake, Singkil Indonesia Leidonald, Rusdi; Muhtadi, Ahmad Muhtadi; Susetya, Ipanna Enggar; Dewinta, Astrid Fauzia; Hasibuan, Julia Syahriani; Simamora, Lauran F.M.; Saville, Ramadhona
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 3 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.3.329-339

Abstract

Anak Laut Lake a tropical coastal lake in Singkil, Aceh Province, is directly connected to the Indian Ocean on the northwestern part of Sumatra Island. The existence of oil palm plantations in the northern part of Lake Anak Laut has the potential to pollute the lake waters. Therefore, this research aims to determine the dynamics of water quality which is influenced by the tidal cycle and the level of pollution of Lake Anak Laut. This research was conducted on March and April 2023. Water sampling was conducted in four (4) times, following the tidal cycle, namely new month, first quarter, full moon, and last quarter. The sampling was also carried out at high and low tides. The method for determining water pollution is the Canadian Council of Ministers of the Environment (CCME) and Pollution Index Method (PI). The results of the research show that the current and water level of Anak Laut Lake varies according to the tidal cycle, so the water quality fluctuates greatly following the tidal cycle. The concentration of organic matter and nutrients as well as Total Coliform showed higher in the last quarter phase where the water entering the lake was very low. The high level of organic matter is caused by 'waste' from palm oil plantation activities located north of Anak Laut Lake. The water quality status of Anak Laut Lake is categorized as marginal-poor based on CCME (score 42-66) and moderate based on PI (score 5-8). In general, water quality conditions are "better" at high tide (new month and full moon) than at low tide (first quarter and last quarter).
Correlation of Bio-physicochemical Factors with the Expansion of Mangrove Forests in Laikang Bay, Indonesia Mulyani, Sri; Surya, Batara; Rasyidi, Emil Salim; Muhibuddin, Andi; Mahmud, Haris
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 4 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.4.467-480

Abstract

The bio-physicochemical conditions of seawater are critically important in the rate of expansion of mangrove forests. This study aims to assess the driving factors of mangrove forest expansion with bio-physicochemical water quality analysis using the Maximum Entropy (MaxEnt) method in Laikang Bay, Indonesia. Water quality analysis included measurements of NO3, PO4, kH, salinity, current speed, brightness (D3), NO2, pH, and chlorophyll-a levels (bio-physicochemical factors). This research adopts quantitative methods, with data collected from 42 specific locations between 12:00 a.m. and 3:00 p.m. The observation data was gathered using the stratified random sampling method. Spatial distribution mapping of mangroves and observation data were analyzed using Euclidean nearest neighbor distance with ArcGIS software version 8.1. The MaxEnt method was applied to investigate the percentage contribution of water quality on the distribution of mangroves. The results of this study indicate that the most significant factor contributing to the growth and expansion of mangrove forests in Laikang Bay is the PO4 content, with a contribution value of 47.4%. The PO4 concentration ranges from 0.10 to 1.40 mg.100g-1, with a concentration of approximately 0.10 mg.100g-1 having the greatest impact. Meanwhile, the less influential factor is brightness (D3), with a contribution value of 0.3%. These results indicate that to maintain the growth and expansion of mangrove forests in Laikang Bay, it is necessary to maintain the levels of these influential variables.
Utilizing Environmental DNA to Identify Eukaryotic Diversity in Mangrove Sediments at Demak, Central Java, Indonesia Cahyani, Ni Kadek Dita; Jumari, Jumari; Hariyati, Riche; Rahadian, Rully; Rahim, Aulia; Zega, Enita Setiawati; Kholifah, Rizqi Widya Nur; Barber, Paul Hendry; Putro, Sapto Purnomo; Soeprobowati, Tri Retnaningsih
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 4 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.4.543-556

Abstract

The mangrove ecosystem, found along tropical and subtropical coasts, adapts to extreme conditions like rapid tidal changes, high salinity, anthropogenic influences, and anoxic environments. Mangrove sediments host diverse organisms, particularly invertebrates and bacteria, which significantly influence sediment structure and biochemical processes by enhancing permeability and water flow. Modern molecular approaches, notably Next-Generation Sequencing (NGS), are increasingly used to identify macro and microorganism communities in sediments. NGS, a powerful tool for DNA and RNA sequencing, allows for parallel sequencing of numerous DNA fragments, providing comprehensive insights into genome structure, genetic variants, gene expression, and epigenetic modifications. Its efficiency and cost-effectiveness make NGS vital for both basic biological research and clinical diagnostics. Recent NGS studies on mangrove sediments have focused on bacterial, archaeal, and fungal diversity. The study examines eukaryotic diversity in mangrove sediments at two locations, targeting the Cytochrome Oxidase Subunit I (COI) gene, a universal marker for eukaryotes. Results indicate distinct taxa at each site with minimal overlap, demonstrating eDNA's potential for assessing both macro and microorganism diversity in mangrove sediments. This preliminary study underscores the utility of molecular techniques in biodiversity research and also dynamic ecosystem changes in the mangrove sediment ecosystem. The high influence of the environment around the mangrove ecosystem will affect the quality of the mangrove itself. eDNA here provides a fast method for recording possible changes to be able to carry out better management in the future.
Assessment of Ecosystem Health and Carbon Stocks in the Seagrass Meadows of Mengiat Beach, Bali, Indonesia Choesin, Devi Nandita; Gouw, Amadeus Devin; Pitriana, Pipit
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 29, No 4 (2024): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.29.4.481-494

Abstract

Seagrass meadows provide many important ecosystem services. They are now recognized as blue carbon ecosystems that are crucial in the mitigation of global climate change. This study was conducted at Mengiat Beach in Bali, Indonesia, where there are extensive seagrass meadows along the shorelines, but also considerable anthropogenic activity that pose threats to the ecosystem. The objectives of this study were to: (1) describe the seagrass community at Mengiat Beach; (2) assess the health status of the seagrass ecosystem; and (3) estimate carbon stocks stored within the ecosystem. Vegetation analysis was conducted to describe the seagrass community in terms of density, cover, biomass and species importance. Spatial Sentinel-2 satellite data with unsupervised classification was used to determine the extent of seagrass meadows. Carbon stocks in sediment and biomass were estimated using the loss on ignition method. The seagrass community at Mengiat Beach consists of at least five different species, dominated by Cymodocea rotundata. The meadows are characterized by high density (588 ind.m-2) and good cover (60.7%). They are considered healthy, with good ecological quality, as indicated by a SEQI (Seagrass Ecological Quality Index) of 0.69. The seagrass ecosystem stores a significant amount of carbon, with 99.23% of it stored in sediment. Total carbon stock in sediment and seagrass biomass is estimated at 133.39 MgC.ha-1. When extrapolated to the total seagrass area of 43.21 ha, the meadows at Mengiat Beach store a total carbon stock of 5.76 GgC, highlighting their potential as high-carbon reservoirs and importance in climate change mitigation efforts.  

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