Pub Date : 2023-02-06DOI: 10.14710/ik.ijms.28.1.12-26
Apriansyah Apriansyah, A. Atmadipoera, I. Jaya, D. Nugroho, M. Akhir
The Coastal and Regional Ocean Community Model (CROCO) was applied to simulate the three dimensional ocean circulation on the southern Sunda Shelf with a horizontal resolution of 1/18o and 40 vertical layers. This configuration is called as CROCO18-SSS. The initial and open boundary conditions were derived from a global reanalysis product at a resolution of 1/12o from the Copernicus Marine Environment Monitoring Service (CMEMS). The regional model was driven by atmospheric, tides, and river discharges data from a wide variety of datasets, each with a different resolution. To test the model performance and capabilities of the CROCO18-SSS model outputs including sea level anomaly, current velocity, temperature, salinity, and volume transport, we have compared in the simulation results with other reanalysis product and satellite-derived datasets. The CROCO18-SSS model outputs reproduced the regional ocean circulation well from observations and reanalysis products. For example, the reversal of the monsoonal current in the southern sunda shelf, as well as strong persistent southward Makassar throughflow and their interaction in the southern Makassar Strait, can be seen clearly. The vertical structure of the zonal current component was comparable to that of the reanalysis product reference. The seasonal shift in temperature and salinity, with the water becoming colder and saltier during the northwest monsoon and warmer and fresher during the southeast monsoon, was also accurately reproduced by the CROCO18-SSS model. Additionally, the mean volume transport calculated by the CROCO18-SSS model for the Makassar and Karimata Straits was comparable to that reported in previous studies.
{"title":"An Evaluation of a 1/18o Resolution Regional Ocean Circulation Model of CROCO in the Southern Sunda Shelf","authors":"Apriansyah Apriansyah, A. Atmadipoera, I. Jaya, D. Nugroho, M. Akhir","doi":"10.14710/ik.ijms.28.1.12-26","DOIUrl":"https://doi.org/10.14710/ik.ijms.28.1.12-26","url":null,"abstract":"The Coastal and Regional Ocean Community Model (CROCO) was applied to simulate the three dimensional ocean circulation on the southern Sunda Shelf with a horizontal resolution of 1/18o and 40 vertical layers. This configuration is called as CROCO18-SSS. The initial and open boundary conditions were derived from a global reanalysis product at a resolution of 1/12o from the Copernicus Marine Environment Monitoring Service (CMEMS). The regional model was driven by atmospheric, tides, and river discharges data from a wide variety of datasets, each with a different resolution. To test the model performance and capabilities of the CROCO18-SSS model outputs including sea level anomaly, current velocity, temperature, salinity, and volume transport, we have compared in the simulation results with other reanalysis product and satellite-derived datasets. The CROCO18-SSS model outputs reproduced the regional ocean circulation well from observations and reanalysis products. For example, the reversal of the monsoonal current in the southern sunda shelf, as well as strong persistent southward Makassar throughflow and their interaction in the southern Makassar Strait, can be seen clearly. The vertical structure of the zonal current component was comparable to that of the reanalysis product reference. The seasonal shift in temperature and salinity, with the water becoming colder and saltier during the northwest monsoon and warmer and fresher during the southeast monsoon, was also accurately reproduced by the CROCO18-SSS model. Additionally, the mean volume transport calculated by the CROCO18-SSS model for the Makassar and Karimata Straits was comparable to that reported in previous studies.","PeriodicalId":13381,"journal":{"name":"ILMU KELAUTAN: Indonesian Journal of Marine Sciences","volume":"41 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-02-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78495023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-09-08DOI: 10.14710/ik.ijms.28.1.27-36
I. Irwansyah, Faiz Isma, Y. Ismida, M. Isma, S. Sufahani, H. Akbar
Kuala Langsa estuary is a semi-closed zone where there is an exchange of two water masses between river and tidal of the Malacca Strait. The exchange of those two water masses occurs as a physical result of fluctuating estuaries. This caused Suspended Sediment Concentration (SSC) continue to increase as the estuary is the final distribution point for sediment brought from upstream by erosion in the Langsa River. This sediment contributes to the silting of Langsa estuary. This is caused the KRI dr. Soeharso Hospital to be unable to dock at the Kuala Langsa Port during the 66th Surya Bhaskara Jaya Navy Operations 2017. It’s necessary to study estuary physical conditions, which include bathymetry, currents, temperature, salinity, and concentrations of floating sediment that occur as a result of the tides and river discharges. This research used quantitative and qualitative exploratory methods, analyzed a direct correlation between the measurement results, roughness coeficient, and sediment transport rate used relevant empirical equations (Duboy's, Einstein's, Rottner, Chang, Simons, and Richardson, and Lane and Kalinske aquations). This research found that the Langsa estuary is 16 km with a semidiurnal tidal type. In the Langsa estuary, it was discovered that the highest sediment rate was at the mouth of the estuary is 10.700.739,71 ton/day-1 and the physical model of Muara Langsa has a good correlation to the results of measurements-model indicate value of CC width = 0.959 and tide CC= 0.421, This study provides initial information for conducting hydrodynamic and morphological models at the mouth of estuary.
瓜兰沙河口是马六甲海峡的河流和潮汐之间有两个水团交换的半封闭地带。这两种水团的交换是河口波动的物理结果。这导致悬沙浓度(SSC)持续增加，因为河口是上游侵蚀带来的泥沙在朗沙河的最终分布点。这些沉积物导致了朗沙河口的淤积。这导致KRI dr. Soeharso医院在2017年第66次Surya Bhaskara Jaya海军行动期间无法停靠在吉隆坡兰沙港。有必要研究河口的物理条件，包括水深、水流、温度、盐度和由于潮汐和河流排放而产生的浮沙浓度。本研究采用定量与定性相结合的探索方法，利用相关经验方程(Duboy’s, Einstein’s, Rottner, Chang, Simons, and Richardson, Lane and Kalinske方程)分析了测量结果与粗糙度系数、输沙率之间的直接相关性。研究发现，朗沙河口长16公里，为半日潮型。在朗沙河口，发现河口处泥沙速率最高，为10.700.739,71 t /d -1，其物理模型与实测结果具有良好的相关性，模型指示值为CC宽度= 0.959，潮汐CC= 0.421，为开展河口水动力和形态模型提供了初步信息。
{"title":"Effect of Stream River and Tidal on the Suspended Sediment Concentration of Kuala Langsa Estuary, Aceh, Indonesia","authors":"I. Irwansyah, Faiz Isma, Y. Ismida, M. Isma, S. Sufahani, H. Akbar","doi":"10.14710/ik.ijms.28.1.27-36","DOIUrl":"https://doi.org/10.14710/ik.ijms.28.1.27-36","url":null,"abstract":"Kuala Langsa estuary is a semi-closed zone where there is an exchange of two water masses between river and tidal of the Malacca Strait. The exchange of those two water masses occurs as a physical result of fluctuating estuaries. This caused Suspended Sediment Concentration (SSC) continue to increase as the estuary is the final distribution point for sediment brought from upstream by erosion in the Langsa River. This sediment contributes to the silting of Langsa estuary. This is caused the KRI dr. Soeharso Hospital to be unable to dock at the Kuala Langsa Port during the 66th Surya Bhaskara Jaya Navy Operations 2017. It’s necessary to study estuary physical conditions, which include bathymetry, currents, temperature, salinity, and concentrations of floating sediment that occur as a result of the tides and river discharges. This research used quantitative and qualitative exploratory methods, analyzed a direct correlation between the measurement results, roughness coeficient, and sediment transport rate used relevant empirical equations (Duboy's, Einstein's, Rottner, Chang, Simons, and Richardson, and Lane and Kalinske aquations). This research found that the Langsa estuary is 16 km with a semidiurnal tidal type. In the Langsa estuary, it was discovered that the highest sediment rate was at the mouth of the estuary is 10.700.739,71 ton/day-1 and the physical model of Muara Langsa has a good correlation to the results of measurements-model indicate value of CC width = 0.959 and tide CC= 0.421, This study provides initial information for conducting hydrodynamic and morphological models at the mouth of estuary.","PeriodicalId":13381,"journal":{"name":"ILMU KELAUTAN: Indonesian Journal of Marine Sciences","volume":"78 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91139439","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-29DOI: 10.14710/ik.ijms.27.2.181-188
A. H. Olii, Elena Wonneberger, N. Pasisingi
Regarding exploitation and optimizing fisheries resources management in Tomini Bay, the Layang scad fish (Decapterus russelli, Ruppell 1830) is one of the small pelagic fishes inhabiting the bay that still lacks biological information. The species becomes the main target commodity for local fishers as it is commonly consumed as a protein source for coastal communities. This study aimed to determine the length-weight relationships and the growth pattern of Layang fish caught by fishers from Tomini Bay. The samples were collected once per month at Gorontalo City Fish Landing Spot from April to June 2020. Tomini Bay was confirmed as the fishing ground of all the landed fish. Layang is caught by Mini purse seines with a minimum mesh size of ¾ inch. A total of 896 samples of Layang fish were collected randomly from the fishers' catch during their unloading activity at the landing site. Abdomen dissection was performed on all samples for determining the fish’s sex. The fish samples' total length and body weight were measured using a ruler (nearest = 1 mm) and a scale (nearest = 0.01 gram). The result revealed that the length-weight equation of male Layang was W = 0.000004 L3.1972 (R2 = 97.57%), and that of female was W = 0.0000007 L3.0613 (R2 = 98.99%). This result implied a positive allometric growth pattern, excluding the females in April 2020.
{"title":"Growth Performance of Layang (Scad) Fish (Decapterus russelli, Ruppell 1830) Caught from Tomini Bay, Indonesia","authors":"A. H. Olii, Elena Wonneberger, N. Pasisingi","doi":"10.14710/ik.ijms.27.2.181-188","DOIUrl":"https://doi.org/10.14710/ik.ijms.27.2.181-188","url":null,"abstract":"Regarding exploitation and optimizing fisheries resources management in Tomini Bay, the Layang scad fish (Decapterus russelli, Ruppell 1830) is one of the small pelagic fishes inhabiting the bay that still lacks biological information. The species becomes the main target commodity for local fishers as it is commonly consumed as a protein source for coastal communities. This study aimed to determine the length-weight relationships and the growth pattern of Layang fish caught by fishers from Tomini Bay. The samples were collected once per month at Gorontalo City Fish Landing Spot from April to June 2020. Tomini Bay was confirmed as the fishing ground of all the landed fish. Layang is caught by Mini purse seines with a minimum mesh size of ¾ inch. A total of 896 samples of Layang fish were collected randomly from the fishers' catch during their unloading activity at the landing site. Abdomen dissection was performed on all samples for determining the fish’s sex. The fish samples' total length and body weight were measured using a ruler (nearest = 1 mm) and a scale (nearest = 0.01 gram). The result revealed that the length-weight equation of male Layang was W = 0.000004 L3.1972 (R2 = 97.57%), and that of female was W = 0.0000007 L3.0613 (R2 = 98.99%). This result implied a positive allometric growth pattern, excluding the females in April 2020.","PeriodicalId":13381,"journal":{"name":"ILMU KELAUTAN: Indonesian Journal of Marine Sciences","volume":"2018 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73672340","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-21DOI: 10.14710/ik.ijms.27.2.159-168
Faisol Mas’ud, M. B. Santanumurti, M. Gabr, Mamdouh T Jamal, N. A. Fanni, M. Saad
The fisheries potential in Gresik Regency is in danger from industrial lead (Pb) pollution. One possible solution is using Sargassum crassifolium, which acts as an absorbent to eliminate Pb in waters. S. crassifolium is characterized by its great affinity for metal cations to bind heavy metal content. This study aimed at finding the effect of S. crassifolium in different forms (wet, dry, and alginate) to absorb Pb content in water. This research was conducted from July to September 2020. The water sample was taken from Gresik Regency and S. crassifolium was obtained from farmers in Talango Island, Sumenep District, Madura. The effectiveness test of the three treatments was conducted based on contact time and biomass factor. Based on the contact time, each treatment was compared with the contact time (1, 7, and 14 days) with 10 g mass per treatment. Meanwhile, for the biomass factor, each treatment was compared by weight (10, 20, and 30 g) for 7 days. The contact time showed that in 14 days, the alginate form of S. crassifolium had the highest absorbent power with 1.370±0.0034 mg.L-1 of lead absorbed and 100% absorbed value. Based on the absorbent mass treatment, 10 g alginate gave the best result with the absorbed lead of 1.364±0.0028 mg.L-1 and an absorption value of 99.71%. The water quality showed that parameters of Dissolved Oxygen (DO), salinity, and nitrates from Gresik Regency were not above standard due to heavy metal pollution. S. crassifolium treatment could decrease the nitrite and nitrate values while increasing DO although still below the standard. This study indicated that 10 g alginate of S. crassifolium in 14 days was effective as a bio-absorbent for Pb heavy metal.
{"title":"Lead (Pb) Biosorption by Intact Biomass and Alginate Extract of Sargassum crassifolium Originated from Gresik Regency Waters","authors":"Faisol Mas’ud, M. B. Santanumurti, M. Gabr, Mamdouh T Jamal, N. A. Fanni, M. Saad","doi":"10.14710/ik.ijms.27.2.159-168","DOIUrl":"https://doi.org/10.14710/ik.ijms.27.2.159-168","url":null,"abstract":"The fisheries potential in Gresik Regency is in danger from industrial lead (Pb) pollution. One possible solution is using Sargassum crassifolium, which acts as an absorbent to eliminate Pb in waters. S. crassifolium is characterized by its great affinity for metal cations to bind heavy metal content. This study aimed at finding the effect of S. crassifolium in different forms (wet, dry, and alginate) to absorb Pb content in water. This research was conducted from July to September 2020. The water sample was taken from Gresik Regency and S. crassifolium was obtained from farmers in Talango Island, Sumenep District, Madura. The effectiveness test of the three treatments was conducted based on contact time and biomass factor. Based on the contact time, each treatment was compared with the contact time (1, 7, and 14 days) with 10 g mass per treatment. Meanwhile, for the biomass factor, each treatment was compared by weight (10, 20, and 30 g) for 7 days. The contact time showed that in 14 days, the alginate form of S. crassifolium had the highest absorbent power with 1.370±0.0034 mg.L-1 of lead absorbed and 100% absorbed value. Based on the absorbent mass treatment, 10 g alginate gave the best result with the absorbed lead of 1.364±0.0028 mg.L-1 and an absorption value of 99.71%. The water quality showed that parameters of Dissolved Oxygen (DO), salinity, and nitrates from Gresik Regency were not above standard due to heavy metal pollution. S. crassifolium treatment could decrease the nitrite and nitrate values while increasing DO although still below the standard. This study indicated that 10 g alginate of S. crassifolium in 14 days was effective as a bio-absorbent for Pb heavy metal.","PeriodicalId":13381,"journal":{"name":"ILMU KELAUTAN: Indonesian Journal of Marine Sciences","volume":"62 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78883211","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-13DOI: 10.14710/ik.ijms.27.2.133-140
Novita Permata Putri, I. Irwani, Munasik Munasik, R. Yuneni, Faqih Akbar Alghozali, A. Mahardini
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.
{"title":"Mitochondrial COI Haplotype Diversity of Rhynchobatus australiae Collected from Ketapang Fish Port, Bangka Belitung Islands","authors":"Novita Permata Putri, I. Irwani, Munasik Munasik, R. Yuneni, Faqih Akbar Alghozali, A. Mahardini","doi":"10.14710/ik.ijms.27.2.133-140","DOIUrl":"https://doi.org/10.14710/ik.ijms.27.2.133-140","url":null,"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.","PeriodicalId":13381,"journal":{"name":"ILMU KELAUTAN: Indonesian Journal of Marine Sciences","volume":"134 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77172554","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-13DOI: 10.14710/ik.ijms.27.2.111-123
A. Rachman, H. Thoha, M. D. B. Intan, O. R. Sianturi, Y. Witasari, S. Wibowo, M. Iwataki
Dinoflagellate cysts have an important role for their bloom dynamics, which are commonly deposited along fine sediment grains and become the source of the next bloom. This study aimed to describe the cyst banks species composition, and their relationship with the sediment particles size and plankton composition in the coast of Pangkajene, South Sulawesi. Cysts observed in this study were extracted from seabed sediments collected from 9 sites. A potential cyst bank, with a cyst density of 240 cysts.g-1 sediment wet weight was found at PK-19, located in proximity to a large harbour complex. Although unusual, cyst density was significantly and positively correlated with the percentage of gravel. In contrast, the diversity of cysts seems to be affected by the percentage of fine sediments, such as silt and clay. None of the sediment composition was found strongly and significantly affecting both cyst density and diversity. A southward increase in cyst density was similar to the trend in the cell density of its planktonic form. Cysts of Protoperidinium spp., Scrippsiella spp., and Pheopolykrikos hartmannii were common and abundant in the sediment. Aside from Protoperidinium spp., most dinoflagellate species found in cyst form were absent from the water column. The occurrence of cysts of harmful dinoflagellates with records of devastating blooms in other coastal areas in Indonesia, such as Margalefidinium polykrikoides, Pyrodinium bahamense, and Gymnodinium catenatum, signifies a need to regularly monitor the area around Pangkajene coast to mitigate impacts of future blooms.
{"title":"Dinoflagellate Cyst Distribution in Relation to the Sediment Composition and Grain Size in the Coastal Area of Pangkajene, South Sulawesi, Indonesia","authors":"A. Rachman, H. Thoha, M. D. B. Intan, O. R. Sianturi, Y. Witasari, S. Wibowo, M. Iwataki","doi":"10.14710/ik.ijms.27.2.111-123","DOIUrl":"https://doi.org/10.14710/ik.ijms.27.2.111-123","url":null,"abstract":"Dinoflagellate cysts have an important role for their bloom dynamics, which are commonly deposited along fine sediment grains and become the source of the next bloom. This study aimed to describe the cyst banks species composition, and their relationship with the sediment particles size and plankton composition in the coast of Pangkajene, South Sulawesi. Cysts observed in this study were extracted from seabed sediments collected from 9 sites. A potential cyst bank, with a cyst density of 240 cysts.g-1 sediment wet weight was found at PK-19, located in proximity to a large harbour complex. Although unusual, cyst density was significantly and positively correlated with the percentage of gravel. In contrast, the diversity of cysts seems to be affected by the percentage of fine sediments, such as silt and clay. None of the sediment composition was found strongly and significantly affecting both cyst density and diversity. A southward increase in cyst density was similar to the trend in the cell density of its planktonic form. Cysts of Protoperidinium spp., Scrippsiella spp., and Pheopolykrikos hartmannii were common and abundant in the sediment. Aside from Protoperidinium spp., most dinoflagellate species found in cyst form were absent from the water column. The occurrence of cysts of harmful dinoflagellates with records of devastating blooms in other coastal areas in Indonesia, such as Margalefidinium polykrikoides, Pyrodinium bahamense, and Gymnodinium catenatum, signifies a need to regularly monitor the area around Pangkajene coast to mitigate impacts of future blooms.","PeriodicalId":13381,"journal":{"name":"ILMU KELAUTAN: Indonesian Journal of Marine Sciences","volume":"16 4","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91479897","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-09DOI: 10.14710/ik.ijms.27.2.101-110
E. Yudiati, Alifia Nabilla Putri, Akbar Harahap, N. Azhar, C. A. Suryono, D. Prabowo, R. Alghazeer
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.
{"title":"Light Intensity Promote Pigment Contents, Biomass Production, Total Lipid and Specific Fatty Acid Profile on Nannochloropsis sp. Culture","authors":"E. Yudiati, Alifia Nabilla Putri, Akbar Harahap, N. Azhar, C. A. Suryono, D. Prabowo, R. Alghazeer","doi":"10.14710/ik.ijms.27.2.101-110","DOIUrl":"https://doi.org/10.14710/ik.ijms.27.2.101-110","url":null,"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.","PeriodicalId":13381,"journal":{"name":"ILMU KELAUTAN: Indonesian Journal of Marine Sciences","volume":"22 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82804342","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-04-04DOI: 10.14710/ik.ijms.27.2.93-100
S. Andriyono, Reza Istiqomatul Hidayah, L. Sulmartiwi, A. A. Hidayani, M. Alam
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.
{"title":"Molecular Identification and Phylogenetic Trees Reconstruction of Blue Swimming Crabs (Decapoda: Portunidae) from Pangpang Bay, Banyuwangi","authors":"S. Andriyono, Reza Istiqomatul Hidayah, L. Sulmartiwi, A. A. Hidayani, M. Alam","doi":"10.14710/ik.ijms.27.2.93-100","DOIUrl":"https://doi.org/10.14710/ik.ijms.27.2.93-100","url":null,"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.","PeriodicalId":13381,"journal":{"name":"ILMU KELAUTAN: Indonesian Journal of Marine Sciences","volume":"118 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-04-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84896963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-08DOI: 10.14710/ik.ijms.27.2.124-132
Audina Putri, D. Bengen, N. Zamani, U. Salma, N. Kusuma, N. T. Diningsih, S. Kleinertz
Mud crabs (Scylla serrata and S. olivacea) are important fisheries resources, but their population in nature is decreasing due to anthropogenic activities, like the deforestation of mangrove forests. Hence, it is crucial to conserve this marine biota for future sustainable use and to conserve our marine biodiversity. Conducting studies on the biological interactions of mud crabs in mangrove habitats can be one of the future conservation approaches. Accordingly, an analysis of the functional relationships between Scylla spp. abundance and the respective mangrove habitat have to be carried out. The research was conducted in the mangrove ecosystem of Bee Jay Bakau Resort Probolinggo (BJBR). Data were collected using line transects and quadrant transects. The Associations between mangroves and mud crab habitat structures were analyzed using the Correspondence Analysis (CA) method. The results show that the relationship matrix between Scylla spp. and the structure of the mangrove habitat is centered on the F1 and F2 factorial axes (89.22%). S. serrata of all size classes were associated with dense mangroves (≥15 trees per 100m2) and high salinities (3-4 ppt), while S. olivacea has shown to be associated with rare to very dense mangrove systems. It indicates that S. olivacea tends to have a higher adaptation rate than S. serrata in this mangrove system. This study will provide information and recommendation for the conservation management of mud crabs and mangrove ecosystems to conserve marine biodiversity.
{"title":"Mangrove Habitat Structure of Mud Crabs (Scylla serrata and S. olivacea) in the Bee Jay Bakau Resort Probolinggo, Indonesia","authors":"Audina Putri, D. Bengen, N. Zamani, U. Salma, N. Kusuma, N. T. Diningsih, S. Kleinertz","doi":"10.14710/ik.ijms.27.2.124-132","DOIUrl":"https://doi.org/10.14710/ik.ijms.27.2.124-132","url":null,"abstract":"Mud crabs (Scylla serrata and S. olivacea) are important fisheries resources, but their population in nature is decreasing due to anthropogenic activities, like the deforestation of mangrove forests. Hence, it is crucial to conserve this marine biota for future sustainable use and to conserve our marine biodiversity. Conducting studies on the biological interactions of mud crabs in mangrove habitats can be one of the future conservation approaches. Accordingly, an analysis of the functional relationships between Scylla spp. abundance and the respective mangrove habitat have to be carried out. The research was conducted in the mangrove ecosystem of Bee Jay Bakau Resort Probolinggo (BJBR). Data were collected using line transects and quadrant transects. The Associations between mangroves and mud crab habitat structures were analyzed using the Correspondence Analysis (CA) method. The results show that the relationship matrix between Scylla spp. and the structure of the mangrove habitat is centered on the F1 and F2 factorial axes (89.22%). S. serrata of all size classes were associated with dense mangroves (≥15 trees per 100m2) and high salinities (3-4 ppt), while S. olivacea has shown to be associated with rare to very dense mangrove systems. It indicates that S. olivacea tends to have a higher adaptation rate than S. serrata in this mangrove system. This study will provide information and recommendation for the conservation management of mud crabs and mangrove ecosystems to conserve marine biodiversity.","PeriodicalId":13381,"journal":{"name":"ILMU KELAUTAN: Indonesian Journal of Marine Sciences","volume":"27 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79440617","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2022-03-01DOI: 10.14710/ik.ijms.27.1.83-92
A. Kurniawan, A. Egon, K. A. Sujatmiko, Ardi Iman Malakani
The development planning of a tidally-influenced fluvial zone poses a complex interaction between river discharge and its effect on the tidal patterns, especially in the dense population and high economic activity like Palembang located in South Sumatra Indonesia. Previous studies on numerical modelling in this area have focused on the flood; however, the hydrodynamic modelling described interaction between river discharge and tidal is not described in more detail. The present study aims to better understand the zone by using a combination of numerical modelling and qualitative assessment of in situ measurement data. Hence, the water level condition in the study area is a mix of tidal and river discharge. A 2D-hydrodynamic modeling has been successfully conducted to assess their interaction in this zone properly by using the commercial software, called MIKE21 FM. This study describes setting up the computational model, boundary location, type of forcing (tidal and non-tidal), bedform roughness, turbulent viscosity and extensive calibration and validation. In situ measurement indicates that the site's water level and flow characteristic is complex, a mixture of tidal force from the downstream and river flows from the upstream in which seasons play an important role. It is found that comparing model outputs and the measurement data in the study area for the validation and verification process effectively describes the hydrodynamic condition in the fluvial-estuarine transition area of Palembang. As the model shows good reliability, the long term hydrodynamic in line with transport model should be developed to support the Palembang area rapid development.
{"title":"Hydrodynamic Modelling of Tidally-Influenced Fluvial Zone, a study case of Palembang, Indonesia","authors":"A. Kurniawan, A. Egon, K. A. Sujatmiko, Ardi Iman Malakani","doi":"10.14710/ik.ijms.27.1.83-92","DOIUrl":"https://doi.org/10.14710/ik.ijms.27.1.83-92","url":null,"abstract":"The development planning of a tidally-influenced fluvial zone poses a complex interaction between river discharge and its effect on the tidal patterns, especially in the dense population and high economic activity like Palembang located in South Sumatra Indonesia. Previous studies on numerical modelling in this area have focused on the flood; however, the hydrodynamic modelling described interaction between river discharge and tidal is not described in more detail. The present study aims to better understand the zone by using a combination of numerical modelling and qualitative assessment of in situ measurement data. Hence, the water level condition in the study area is a mix of tidal and river discharge. A 2D-hydrodynamic modeling has been successfully conducted to assess their interaction in this zone properly by using the commercial software, called MIKE21 FM. This study describes setting up the computational model, boundary location, type of forcing (tidal and non-tidal), bedform roughness, turbulent viscosity and extensive calibration and validation. In situ measurement indicates that the site's water level and flow characteristic is complex, a mixture of tidal force from the downstream and river flows from the upstream in which seasons play an important role. It is found that comparing model outputs and the measurement data in the study area for the validation and verification process effectively describes the hydrodynamic condition in the fluvial-estuarine transition area of Palembang. As the model shows good reliability, the long term hydrodynamic in line with transport model should be developed to support the Palembang area rapid development.","PeriodicalId":13381,"journal":{"name":"ILMU KELAUTAN: Indonesian Journal of Marine Sciences","volume":"4 1","pages":""},"PeriodicalIF":0.0,"publicationDate":"2022-03-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85289693","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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