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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
 58   59   60   61   62 
Mitochondrial COI Haplotype Diversity of Rhynchobatus australiae Collected from Ketapang Fish Port, Bangka Belitung Islands Novita Permata Putri; Irwani Irwani; Munasik Munasik; Ranny Ramadhani Yuneni; Faqih Akbar Alghozali; Angka Mahardini
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 27, No 2 (2022): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.27.2.133-140

Abstract

Rhynchobatus australiae is a member of the Rhinidae family and can be found in the Indo Pacific. This species is categorized as Critically Endangered according to The International Union for Conservation of Nature and Natural Resources (IUCN) Red List and listed as Appendix II Convention on International Trade in Endangered Species of Wild Fauna and Flora (CITES), due to population declines. Sustainable fisheries management is urgently needed. Information related to genetic diversity is one of the most important aspects of information for appropriate sustainable fisheries management. Therefore, this research aims to investigate the genetic diversity of Rhynchobatus australiae collected from Ketapang Fish Port Bangka Belitung Islands. Total 21 samples were collected at Ketapang Fish Port. DNA extraction was carried out using the 10% chelex method and amplification was done through PCR method on the mitochondrial DNA using Fish BCL and Fish BCH primer. Sequences in size of 653 base pairs were successfully obtained from all fish samples showing the existence of 2 clades from the construction of the phylogeny tree with close genetic distance. Results showed high haplotype diversity (Hd: 0.733 ± 0.082) and low nucleotide diversity (π: 0.00176± 0.00036) with 6 polymorphic sites (S) from 7 unique haplotypes (h). This research provides basic information of genetic diversity of Rhynchobatus australiae collected from Ketapang Fish Port and complements other information to better understand the status of the threatened Rhynchobatus australiae population.
Estimation of Plastic and Other Waste Disposed of by Longline and Gillnet Fleets Operating from Cilacap Berri Miraz Kholipah Rahman; Wazir Mawardi; Muhammad Fedi Alfiadi Sondita; Craig Proctor
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 27, No 2 (2022): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.27.2.141-150

Abstract

Tuna-fishing boats based at the Cilacap Oceanic Fishing Port are potential contributors to marine debris in the Indian Ocean. Without a quantitative assessment of the types and amount of debris, port management cannot develop a strategy to address this problem. This study estimated the quantities of plastics and cartons disposed of by these fisheries in the Indian Ocean. Data were collected through observations and interviews with boat managers/owners or fishermen in the port, from August to November 2019, to evaluate the boat supplies loaded on board in the port and the waste returned to the port. The marine disposal per fishing trip (the difference between the quantity of supplies taken to sea and the quantity of waste returned to port) was calculated for 89 trips of gillnet and longline boats, for a size range of 20 to 90 GT. There was no at-sea disposal of used engine oil, rice plastic sacks, styrofoam boxes, nor plastic gallon bottles. Other plastics and cartons from consumable packaging were disposed of at sea. The estimates of the plastic waste disposed were 0.8-4.4 kg.boat-1.trip-1 or 2,143-12,024 pieces.boat-1.trip-1 while the estimates of the cartons disposed were 3.5-19.4 kg.boat-1.trip-1 or 203-1,140 pieces.boat-1.trip-1. The study concluded that fishers could easily keep the waste onboard for disposal on return to port. In addition, port management should initiate a system in which the amounts of waste returned to boats returning to port are considered in granting future port clearance to those boats.
Molecular Identification and Phylogenetic Trees Reconstruction of Blue Swimming Crabs (Decapoda: Portunidae) from Pangpang Bay, Banyuwangi Sapto Andriyono; Reza Istiqomatul Hidayah; Laksmi Sulmartiwi; Andi Aliah Hidayani; Md. Jobaidul Alam
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 27, No 2 (2022): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.27.2.93-100

Abstract

Crabs are a group of Decapoda (Portunidae) that act as keystone species from Pangpang Bay as the marine benthic organism. Besides having an ecological function, crab also provides essential components for human health. The crab identification technique is usually conducted based on morphology and anatomy characteristics, in which certain body parts as the key for identification. This study used two identification methods, i.e. morphological features and a molecular approach. Although morphological identification has been carried out, the molecular techniques provide better accuracy and, at the same time, provide additional information about the characteristics of mitochondrial DNA. The purpose of this study is to identify the blue swimming crab caught by a traditional fisherman at Pangpang Bay, Banyuwangi, based on mitochondrial DNA sequence on cytochrome c oxidase subunit I, and reconstructed the phylogenetic tree including genetic distance also was analysed. The nucleotide sequences of the COI gene were analysed by Chromas, Clustalω, Reverse-Complement, and the MegaX. The phylogenetic tree and genetic distance calculations were carried out using Mega X software through the Neighbor-Joining (NJ) Algorithm with the addition of several sequences from the NCBI online database. This study confirmed that the specimen of Pangpang Bay is Portunus pelagicus (BWIPP001 and BWIPP003) and Portunus sanguinolentus (BWIPP002). The species of P. pelagicus have 99.99% similarities with the same species (KJ168060) from China, while the P. sanguinolentus is close to the same species (EU284144) with a per cent identity is 99.97%. The genetic distance, for P. pelagicus and P. sanguinolentus, were in range of 0.00-0.066 and 0.00-0.005 respectively.
Fitness of Cassiopea polyps Inoculated with Different Types of Symbionts Mu'alimah Hudatwi; Diah permata Wijayanti; Ambariyanto Ambariyanto; Michio Hidaka
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 27, No 2 (2022): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.27.2.151-158

Abstract

The specificity of the relationship between cnidarian hosts and symbiotic dinoflagellates (zooxanthellae) differs among host species. Some cnidarian hosts can establish symbiotic relationship with various types of zooxanthellae, while others exhibit high fidelity to specific symbiont type. It is not known how compatibility or specificity of the relationship is determined. We hypothesized that some cnidarian hosts select symbiont type that leads to highest fitness when the host is flexible with symbiont type and more than one types of symbionts are available. As a first step to study this possibility, compatibility of clonal polyps of Cassiopea sp. with six strains of cultured zooxanthellae and the fitness of the host associated with different types of symbionts were studied. Polyp diameter was measured and the number of asexual buds were calculated as a measure of host fitness. The number of zooxanthellae in host and in asexual buds was also measured as a measure of symbiont fitness. Three strains KB8 (clade A), Y106 (clade A), and K100 (clade B) were compatible with the Cassiopea polyps, while other three strains, Y103 (clade C), K111 (clade D), and K102 (clade F) were incompatible. No clear difference in the fitness was found among the polyps inoculated with compatible and incompatible symbiont strains. In one experiment, a compatible strain Y106 seemed to decrease host fitness, but this should be checked by further studies. This study suggests that feeding regimes and long observation period might be important when fitness of hosts associated with different types of symbionts is investigated.
Light Intensity Promote Pigment Contents, Biomass Production, Total Lipid and Specific Fatty Acid Profile on Nannochloropsis sp. Culture Ervia Yudiati; Alifia Nabilla Putri; Akbar Harahap; Nuril Azhar; Chrisna Adi Suryono; Danang Ambar Prabowo; Rabia Alghazeer
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 27, No 2 (2022): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.27.2.101-110

Abstract

Nannochloropsis sp is marine microalga and widely cultured for its benefits. Pigments, lipid, and fatty acid compounds of Nannochloropsis sp are essential elements in the industry. This research aimed to determine the best light intensity on the growth rate, cell density and size, biomass, pigments (chlorophyll a, b, carotenoids), total lipid and fatty acid profile. Nannochloropsis sp. culture was carried out with three light intensity treatments (100, 155, and 180 μmol), with two replications. Periodicity was set up (16:8) with the ratio of dark (8h) to light (16h). The highest cell density and total pigment content of 180 μmol were significantly different (p<0.05) with 155 and 100 μmol. The highest weight of chlorophyll a, b, and carotenoids were found from the intensity of 180 treatment (p < 0.05), followed by 155 and 100 μmol as the smallest one. The bigger cell size was reached from 180 and 155 treatments compared to 100 μmol treatment. The higher wet weight was gained from 155 (564 grams) and followed by 180 μmol (549 grams). The 100 μmol light intensity produced the lowest wet weight (490 gr) (p<0.05). The highest total lipid content was obtained from 155 μmol treatment (0.14 g ww). The microalgae contain SFA/Saturated Fatty Acids (Palmitic, Stearic Acid) and UFA/Unsaturated Fatty Acid (Oleic Acid). The microalgae from 180 μmol produced Eicosanoic acid (Omega-6). The production of certain compounds has differed in light intensity. In the future, the light intensity can be adapted as the alternative solution for producing microalgae for industrial approach, whether for pigments or biodiesel production.
Oceanographic Factors on Coastal Aggregation of Reef Manta (Mobula alfredi) in The Manta Sandy, Raja Ampat, Indonesia Awaludin Ahsin; Retno Hartati; Widianingsih Widianingsih; Erlangga D. Sitorus; Hidayati Azizah; Hadi Endrawati
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 27, No 4 (2022): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.27.4.330-340

Abstract

Reef Manta rays (Mobula alfredi) is an iconic species and under the IUCN Red List of Threatened Species it is classified as vulnerable. Although the decline of population has been reported due to their very high demand and economic value especially for their dried gill plates, they are present all year round at Manta Sandy, Dampier Strait, Raja Ampat, Indonesia. The appearance of M. alfredi may affected by environmental factors. Therefore, this study was aimed to determine the sighted frequency of M. alfredi and their related environmental factors during east and west monsoon. Underwater Visual Census (UVC) and camera trap (PhotoID) method were used to observe the appearance of M. alfredi. The remotely oceanographic data, such as sea surface temperature, chlorophyll-a, sea surface current and tidal data, in the same M. alfredi observation time were obtained from the web of www.oceancolor.gsfc.nasa.gov, www.Hycom.org, Geospatial Information Agency (GIA) and then analyzed using Seadas, Excel, and ArcMap (Geographic Information System). The results showed that during the west monsoon M. alfredi appeared more often (174 sighting) than in the east monsoon (5 sighting). Those appearances were connected with slightly warmer sea surface temperature and high value phytoplankton which is related to zooplankton. For planktivorous elasmobranch, lower sea surface current and high tidal value affect the distribution of zooplankton in those area, so give high feeding opportunity for M. alfredi. High sighted M. alfredi during west monsoon in Manta Sandy attract tourists, therefore regulation for their conservation need to be implemented.
The Nutritional Content of Fish Meal from Bycatch in Batu Beriga Village, Bangka Belitung Sudirman Adibrata; Denny Syaputra; Robet Perangin-angin; Devi Wulansari; Kim V Van
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 27, No 3 (2022): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.27.3.233-239

Abstract

Bycatch has the added value of being processed into meals for animal feed or fish farming needs. Therefore, this study aims to determine the nutritional content of local fish meals from the bycatch in Batu Beriga Village, Bangka Belitung. The method used for processing fish meal was a wet mill from bycatch. Quality parameters referred to the Indonesian National Standard (SNI) 01-2715-1996/Rev.92 regarding fish meal as raw material for feed. The results showed that 4 kg of wet fish could produce a meal of 0.4 kg. The nutritional content of the local fish meal is of high quality as it met the requirements of SNI Quality I, II, and III, allowing it to be released to the market. The laboratory tests showed water, ash, crude protein, crude fat, crude fiber, calcium, phosphorus, NaCl, Gross energy, Carbohydrate, and pH content of 5.06% (SNI Quality I maximum 10%), 18.51% (SNI Quality I maximum 20%), 68.13% (SNI Quality I minimum 1.5%), 5.71% (SNI Quality I maximum 20%), 1.54% (SNI Quality I maximum 8%), 4.09% (SNI Quality I range 2.5-5.0%), 6.82% (SNI Quality I range 1.6-3.2%), 1.78% (SNI Quality I maximum 2%), 4,609.67 Kcal/kg, 0.0%, and 6, respectively. Furthermore, amino acids from a local fish meal could be used as feed mixtures for aquaculture. Bycatch can be used to fish meals as a potential side business for fishers. In sustainable fisheries development, independence in animal feed should be established immediately, hence the dependence on other regions can be minimized.
Overview of Coral Morphology and Plasticity Research Using Bibliometric Methods Ridha Alamsyah; Neviaty P. Zamani; Dietriech G. Bengen; I Wayan Nurjaya; Derek Soto
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 27, No 4 (2022): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.27.4.349-357

Abstract

One of the determining variables that influences coral growth morphology is the aquatic environment. Reef corals are unusual organisms with plant-like development patterns. Reef growth is influenced greatly by the aquatic environment, particularly hydro-oceanography. The same type of coral can have different morphological forms. This mismatch in form can lead to type identification mistakes. There is still a lack of research on morphological changes as an impact of coral plasticity in responding to environmental variables. The goal of this work is to compile a bibliography of coral morphological plasticity studies. Publish or Perish (PoP) program locates the Scopus database and processes the articles. After screening, 101 of the 138 articles found in the Scopus database are eligible to be found. Mendeley reference manager software is then used to handle the selected references. After maintaining the database, use VOSviewer software to classify and visualize the data. The findings suggest that the research topic was chosen based on keywords. Coral morphological plasticity research is primarily focused on the terms coral colonies and species. Small-scale coral morphology, morphological variability, and coral morphometrics are among the topics that have received little attention. The possibility of conducting research on the three subjects is still open. There are still many unanswered mysteries about coral. This work is crucial to research since it illustrates the direction of future plans for exposed coral morphology and plasticity. This review serves as a useful starting point for future coral morphology and plasticity research.
Site Selection for Lobster Culture in Floating Cage using Multi-criteria Analysis Muhammad Junaidi; Nanda Diniarti; Nunik Cokrowati; Alis Mukhlis; Baiq Hilda Astriana; Flaxen D. L. Conway
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 27, No 4 (2022): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.27.4.315-329

Abstract

Spiny lobster is as a very promising culture commodity to be developed due to their high demand in the domestic and global markets. The selection of the suitable location was one of determining factors for the success of lobster cultivation. Various criteria are required for the location of lobster cultivation, both technically and biologically. This research aimed to analyze the suitability sites for lobster culture in floating cages using Multi-criteria Analysis and Geographic Information System (GIS). The research was conducted in May 2018 in North Lombok Regency Water, West Nusa Tenggara. A survey method was applied and used primary and secondary data. Data collected were grouped into 3 categories i.e. oceanographic parameter (water depth, current, wave, and transparency), water quality (temperature, salinity, pH, dissolved oxygen, nitrate, and phosphate), and socio-economic and institutional parameters (legality, easy access, labor availability, and market). Primary data were obtained by measuring oceanography and water quality parameters at 23 observation points on eight transects perpendicular to the coast. Socio-economic and institutional data were obtained from the relevant agencies. Data analysis was done by combining Multi-criteria Analysis and GIS. The result of this research shows that the water condition still supports mariculture activity. The total area covered by this research was 9,087 ha, of which 1,226 ha were found very suitable for lobster culture using floating cage. 
Beach Morphology Changes Due to Sediment Transport Generated by Wave and Current in The Sea Waters of Bengkulu City, Indonesia Supiyati Supiyati; Suwarsono Suwarsono; Mhd Ikhwanuddin Abdullah; Ichsan Setiawan
ILMU KELAUTAN: Indonesian Journal of Marine Sciences Vol 27, No 3 (2022): Ilmu Kelautan
Publisher : Marine Science Department Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/ik.ijms.27.3.240-252

Abstract

Bengkulu City which is located on the west coast of Sumatra Island has a very prospective to be developed for marine, fisheries, tourism, and maritime businesses. However, the coast of Bengkulu has recently changed in its morphology as a result of high sedimentation processes. The purpose of this study is to determine the direction and speed of currents, waves, and sediment transport that cause the changes in the coastal morphology of Bengkulu City. In this study, numerical modeling and field measurements of the current velocity and wave height of the ocean were used. The results of the research show verification of wave height and velocity of ocean currents between model simulation and field measurement is a fairly good fit, with a Mean Absolute Percent Error (MAPE) of 1.5% for wave height and 1.9% for the current velocity. The hydrodynamic simulation shows that the direction of the waves and currents dominantly come from the West and move towards the Northeast of the coastal of Bengkulu City with an average wave height of 2.5 m and the highest wave height of 6.5 m, the lowest wave height of 0.5 m, and the highest and the lowest of current speed is 2.5 m.s-1 and is 0.5 m.s-1, respectively. The simulation of sediment transport shows that the overall net volume is sedimented at about 20.25 m3.y-1. The model of coastal morphology changes shows that the sedimentation occurs in the northeast direction of the coastal of Bengkulu City, from Sungai Hitam Beach to Tapak Paderi Beach, and at Pulau Baai Beach.

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