Jurnal Ilmiah Perikanan dan Kelautan最新文献

{"title":"Integration of Tetraselmis chuii and Artemia sp. Culture in Industrial-Scale Salt Production","authors":"M. A. Alamsjah, Himnna Sayyidatul Islamiyah, Ghishella Ayu Rahmawati, Fadhilah Atika Putri, Rizka Sandra Amalia, Putranti Hikmah Triningtyas, Dwi Yuli Pujiastuti, Adibi Rahiman bin Md Nor","doi":"10.20473/jipk.v16i1.50514","DOIUrl":"https://doi.org/10.20473/jipk.v16i1.50514","url":null,"abstract":"\u0000Abstract\u0000The common technique of traditional salt production in Indonesia is seawater evaporation technology, which uses sunlight to produce salt crystals from seawater. However, in general, the applied technology only produces salt with about 80% NaCl and water contents >7%, impurities >2%, and other contaminants. This produced salt is not suitable to be used as industrial salt. This study aimed to determine the effects of liquid organic fertilizer Gracilaria sp. addition into the culture media of Tetraselmis chuii on Artemia sp. growth, to identify the profile of length, weight, and survival rate of Artemia sp., and finally attempted to uncover the contribution of Artemia sp. in impurity mineral absorption and NaCl content improvement. The results of the study showed that the density of T. chuii based on the concentration of liquid organic fertilizer Gracilaria sp. was significantly different (p<0.05) in each treatment. T. chuii cultivation using liquid organic fertilizer Gracilaria sp. 16 mg N/mL resulted in the highest density on the culture days. However, the studies showed that there was no significant effect (p>0.05) on the weight and length gain of Artemia sp. The research conducted can support the downstream use of products from engineering research in the field of technology to increase the added value of salt products and be part of the contribution to the achievement of the 14th SDG on life below water.\u0000Highlight Research\u0000\u0000Integration of chuii and Artemia sp. culture in salt production could improve NaCl contents by up to 97% and reduced impurities of sulfate and magnesium.\u0000\u0000 \u0000\u0000The result of the first phase of this study is the density of chuii. This finding is useful to find out the effects of Gracilaria sp. liquid organic fertilizer administration as a source of nitrogen that improves the growth of T. chuii.\u0000\u0000\u0000The highest density of T. chuii resulted from a treatment receiving the dose of 16 N mg/L Gracilaria sp. liquid organic fertilizer with > 5 x 106 cells/mL. This finding indicates that the administration of 16 N mg/L Gracilaria liquid organic fertilizer into the culture medium provided a source of nitrogen and phosphorus for the metabolism of T. chuii.\u0000The results of the mineral content test on Artemia sp. show the largest percentage change in Mg2+ > SO42- > Cl- > Na+. The densities of Artemia sp. showed a positive trend of increasing levels of Mg2+ and SO42-, which coincided with decreasing levels of Mg2+ and SO42- in seawater media.\u0000The results of NaCl content measurement in water with Artemia sp. culture integration show salt with excellent quality of 97% that met the criteria of industrial salt. The contribution of Artemia sp. to improving the quality of salt products is interesting and has the potential to serve as an alternative to the traditional salt-farming system that is currently practiced.\u0000","PeriodicalId":17760,"journal":{"name":"Jurnal Ilmiah Perikanan dan Kelautan","volume":"78 11-12","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140491648","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}

{"title":"Social Structure Analysis in Management of South Sumatra Inland Waters","authors":"Fevi Rahma Dwi Putri, Arif Satria, R. Kinseng, Taryono Taryono","doi":"10.20473/jipk.v16i1.48081","DOIUrl":"https://doi.org/10.20473/jipk.v16i1.48081","url":null,"abstract":"\u0000Abstract\u0000The social structure of inland fisheries communities tends to place powerful elites in important positions, while local fishermen are subordinate actors. Patronage is a form of social relationship that describes the unequal social structure between these actors. This research aimed to analyze social structure in the inland waters of South Sumatra in the practice of the Lebak Lebung and River Auction (L3S) in OKI District. To achieve this goal, a constructivist paradigm with qualitative research methods was employed, and the sample comprised 39 informants selected as subjects. The data analysis was conducted in three distinct stages, namely data reduction, presentation, and drawing conclusions. The results showed that the regulation of open access for all parties in the local government regime after 1982 created an institutionalized social relations structure where the government, investors, traders, middlemen, and non-fishing actors dominated compared to the fishermen. The participants in this social landscape strived to accumulate capital to enhance their competitiveness within the L3S domain. A patronage system was implemented with middlemen assuming the role of patron and the fishermen acting as their clients. The current institutional social structure has created an unfair distribution of resource benefits for fishing workers. The novelty theories were found in the working relations of the inland waters community of South Sumatra, namely stratified distribution of rights, dual status, multi-stage patronage, and the positive function of patronage for chief fisherman. Further research should be conducted to research policy revitalization and develop strategic inland water management models.\u0000Highlight Research\u0000The author mentioned 3 highlights from their results research:\u0000\u0000Auction system in inland waters in South Sumatra presents an unfair distribution for fishermen.\u0000Structure of the working relationship formed is an asymmetric patron-client relationship but with novel theories such as the stratified distribution of rights model, dual status, multi-stage patronage, and the positive function of patronage.\u0000An imbalance in local access to auction objects due to their weak ability to accumulate capital.\u0000","PeriodicalId":17760,"journal":{"name":"Jurnal Ilmiah Perikanan dan Kelautan","volume":"72 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140491672","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}

{"title":"Sustainable Pangasius Aquaculture Management Strategy using Multidimensional Scaling (MDS) and Analytical Hierarchy Process (AHP) in Tulungagung Regency, East Java, Indonesia","authors":"Asro Nurhabib, Aida Sartimbul, M. Primyastanto, M. Widodo, Lugu Tri Handoko, Andra Rejekining Rahayu, Suharun Martudi","doi":"10.20473/jipk.v16i1.49377","DOIUrl":"https://doi.org/10.20473/jipk.v16i1.49377","url":null,"abstract":"\u0000Abstract\u0000Aquaculture activities in Tulungagung Regency provide livelihoods for 12,050 households. Therefore, ensuring the sustainability of Pangasius aquaculture activities is crucial for the welfare of fish farmers. This study aims to analyze the sustainability of existing Pangasius aquaculture businesses in Tulungagung Regency, East Java, Indonesia, and to create a sustainable Pangasius aquaculture policy strategy. This quantitative study used Multi-Dimensional Scaling (MDS) and Analytical Hierarchy Process (AHP) analyses to determine the sustainability status of Pangasius aquaculture based on five dimensions: ecological, economic, social, institutional, and technological infrastructure. Among these dimensions, two are less sustainable, particularly infrastructure technology and the economy.\u0000Highlight Research\u0000The author mentioned four highlights from their research:\u0000\u0000Tulungagung Regency is East Java Province's major pangasius producer.\u0000MDS can assess sustainability across multiple dimensions.\u0000AHP enables the prioritization of strategies that must be implemented.\u0000The Pangasius aquaculture company in Tulungagung Regency is currently in a sustainable state.\u0000","PeriodicalId":17760,"journal":{"name":"Jurnal Ilmiah Perikanan dan Kelautan","volume":"42 3","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140514429","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}

{"title":"Feminization of Maroon Clownfish (Amphiprion biaculeatus, Bloch 1790) with 17β-Estradiol Hormonal Induction","authors":"H. Sahusilawane, A. Sudrajat, M. A. Suprayudi, D. Soelistyowati, L. Tumbelaka, I. Effendi","doi":"10.20473/jipk.v15i2.42765","DOIUrl":"https://doi.org/10.20473/jipk.v15i2.42765","url":null,"abstract":"Highlight Research\u0000\u0000The 17β-estradiol hormone induction reduces the percentage of R values in skin and fin color by as much as 50-60%.\u0000The 17β-estradiol hormone induction increases total length and body weight, estradiol content, GIS and HIS, and also glucose content.\u0000The 17β-estradiol hormone induction shows mature development of the gonadal profile from functional male to functional female.\u0000\u0000Abstract\u0000 \u0000As maroon clownfish (Amphiprion biaculeatus) is a protandrous hermaphroditic fish, feminization process with 17β-estradiol hormone can be applied to accelerate the female broodstock candidate supply for further spawning effort. This study aimed to evaluate the feminization of A. biaculeatus with 17β-estradiol hormonal induction. This study used a completely randomized design with several hormone dosage, namely P0 (without 17β-estradiol hormone induction), P1 (0.5 μg 17β-estradiol/g body), P2 (1.0 μg 17β-estradiol/g body), and P3 (1.5 μg 17β-estradiol/g body). These treatments were applied with three replications. Five fish composed of α-fish, β-fish, and three γ-fish were reared in each aquarium for 90 days with a flowing water system. The α- and β-fish were then removed, while the γ-fish was injected with hormone. Otohime pellet feed was fed three times a day until apparent satiation. The results showed that the 17β-estradiol hormone could induce 100% of the feminization process of male A. biaculeatus. The dosage of P3 obtained the lowest value percentage of red, green, blue (RGB), but showing the highest total of length and body weight (6.67±0.42 cm and 6.40±0.78 g, respectively), estradiol content (149.73±4.24 ρg/mL), GSI and HSI (0.38±0.07% and 3.59±0.49%), and glucose content (4.67±0.64 mg/dL), followed by more mature gonad profile than other treatments. This condition indicates that fish in P3 treatment has been reversed as functional female. The average survival rate for the treatment was as high as 60%. Therefore, the application of 17β-estradiol hormonal induction is effective for the feminization process in A. biaculeatus as a protandrous hermaphroditic fish.","PeriodicalId":17760,"journal":{"name":"Jurnal Ilmiah Perikanan dan Kelautan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43582564","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}

{"title":"Microplastic Distribution in Beach Sediments: Comparison Between the North and South Waters of East Java Island, Indonesia","authors":"D. Yona, F. Setyawan, Sisylia Eka Narriyah Putri, F. Iranawati, Muhammad Ariq Kautsar, A. Isobe","doi":"10.20473/jipk.v15i2.41065","DOIUrl":"https://doi.org/10.20473/jipk.v15i2.41065","url":null,"abstract":"Highlight Research\u0000\u0000This is the first study of microplastics in four beach sediments in the east part of Java Island.\u0000Bahak and Pesona Beach are connected to Java Sea (north part), while Tambak Rejo and Balekambang Beach are connected to Indian Ocean (south part).\u0000A higher microplastics were observed on the beaches of the north part compared to the south part.\u0000Local sources and oceanographic parameters of the beaches influence the presence of microplastics in the study areas.\u0000\u0000Abstract\u0000Microplastic pollution in beach sediments has been studied intensively worldwide, but there are limited studies in the beach areas of the eastern Java Island, Indonesia. This study aimed to identify the distribution of microplastic in four beaches in Indonesia: Bahak, Pesona, Tambakrejo, and Balekambang. The first two beaches are located in the north of Java Island and influenced by the east Java Sea, while the last two are located in the south and influenced by the Indian Ocean. Sediment samples were collected along the strandline inside the 1 × 1 m transect quadrate in the top 5 cm using a stainless-steel shovel. Microplastic and granulometry analyses were conducted to obtain microplastic and sediment grain size data, respectively. Physical parameters of the beaches, such as wind, wave, and ocean current, were calculated using Copernicus and NASA (PODAAC), respectively. The total abundance of microplastic ranged from 54.7 ± 48.6 to 103.3 ± 4.7 particles kg-1 with the following descending order: Bahak > Pesona > Tambakrejo > Balekambang. Although there was no statistically significant difference in microplastic concentrations among the beaches, the beaches connected to the Java Sea accumulated more microplastics than the ones connected to the Indian Ocean. Fiber and blue were the dominating type and colors of microplastic. The results confirm that the distribution of microplastic is associated with the morphology of the beaches and the local source.","PeriodicalId":17760,"journal":{"name":"Jurnal Ilmiah Perikanan dan Kelautan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-08-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43303584","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}

{"title":"Black Soldier Fly (Hermetia illucens) Oil Inclusion and its Effects on Growth Performances in Common Carp (Cyprinus carpio)","authors":"V. Herawati, Heni Tri Jayanti, T. Elfitasari, S. Putro, S. Windarto","doi":"10.20473/jipk.v15i2.39846","DOIUrl":"https://doi.org/10.20473/jipk.v15i2.39846","url":null,"abstract":"Highlight Research\u0000\u0000Use of maggot oil as an addition to feed can increase the level of feed consumption of carp.\u0000The addition of maggot oil ( illucens) had a significant effect (P<0.05) on TFC, FCR, FUE, SGR, and survival of common carp.\u0000The use of maggot oil can be an alternative to using feed that is more effective and economical.\u0000\u0000 \u0000Abstract\u0000The demand for common carp (Cyprinus carpio) either its seed or consumption measures has increased every year. Fish growth can be increased by adding nutrients in the form of animal oil sources. An alternative ingredient that can be used to support fish growth with good nutritional content and relatively inexpensive is maggot oil or black soldier fly (H. illucens) oil. The purpose of this study was to determine the effect of maggot oil (H. illucens) in artificial feed on the growth performance of common carp and to determine the best dose of maggot oil. This study used a complete randomized design (CRD) with four treatments and three replicates: A, B, C, and D with the addition of maggot oil doses of 0%, 10%, 15%, and 20%, respectively. The test fish used was a common carp fry measuring 3.59±0.06 cm, 0.79±0.05 g. Observation time was 30 days with a stocking density of 15 fish/aquarium. The results showed that the addition of maggot oil (H. illucens) had a significant effect (P<0.05) on TFC, FCR, FUE, SGR, and survival. Based on the results of the study, the best dose was obtained in the addition of 15% maggot oil with value of TFC 10.57±0.26 g, FCR 1.52±0.03, FUE 65.43±1.54%, SGR 1.57±0.04%/day, and SR 95.56±3.85%. For further research, it is possible to use magot oil to increase carp production.","PeriodicalId":17760,"journal":{"name":"Jurnal Ilmiah Perikanan dan Kelautan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41664827","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}

{"title":"Effects of Various Nitrogen Sources on the Growth and Biochemical Composition of Chlorella sp.","authors":"A. Yuniarti, M. Fakhri, N. Arifin, A. M. Hariati","doi":"10.20473/jipk.v15i2.43182","DOIUrl":"https://doi.org/10.20473/jipk.v15i2.43182","url":null,"abstract":"Highlight Research\u0000\u0000Each species of microalga has a preferable nitrogen source for their optimal growth.\u0000The nitrogen sources in the grown media affected the growth rate and biochemical composition of Chlorella FNUB01.\u0000(NH2)2CO (urea) was found to be the best alternative nitrogen source for Chlorella FNUB01.\u0000For producing 1 g of Chlorella FNUB01, the use of urea reduced the cost of medium by 72.6%.\u0000\u0000Abstract\u0000Chlorella sp. is a potential microalgae species to be produced commercially for feed, growth accelerator, and immuno-modulator in fish and shrimp culture. This study aimed to evaluate the various nitrogen sources on the growth, biomass production, and biochemical composition of Chlorella sp. FNUB01. The nitrogen sources used in this study were urea (NH2)2CO, potassium nitrate (KNO3), and ammonium nitrate (NH4NO3). Sodium nitrate (NaNO3) was used as a control as it is a part of the commercial medium BG-11. Generally, the sources of nitrogen in the media affected the growth and chemical composition of Chlorella sp. FNUB01. This green microalga grew better in the urea-containing medium which accounted for 1.5 times the concentration of that cultured in BG-11 (40 x106 cells. mL-1). Meanwhile, this microalgae species experienced the lowest growth when cultured in NH4NO3-containing medium. The biomass productivity of Chlorella sp. FNUB01 cultured in urea (0.93 g.L-1) was comparable to those grown with NaNO3 as the N source. A similar pattern was recorded for protein, chlorophyll, and carotenoid content as these biochemical contents were affected by N availability in the medium. Urea was an alternative low-cost N source for the culture of Chlorella sp. FNUB01. Replacement of NaNO3 with urea could reduce the cost of the medium by 72.6%.","PeriodicalId":17760,"journal":{"name":"Jurnal Ilmiah Perikanan dan Kelautan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-07-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47314828","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}

{"title":"DNA Barcoding of Cardinalfish (Apogonidae) in Gilimanuk Bay, Bali, Indonesia","authors":"I. Putra, G. Indrawan, E. Faiqoh","doi":"10.20473/jipk.vi.43336","DOIUrl":"https://doi.org/10.20473/jipk.vi.43336","url":null,"abstract":"Highlight Research\u0000\u0000Eight species of cardinalfish in Gilimanuk Bay were delineated using the barcoding method.\u0000This study provides the first nucleotide sequence for Ostorhinchus hartzfeldii in GenBank online database.\u0000The phylogenetic tree showed that each sample resided in a distinct cluster, indicating that the barcoding method efficiently differentiated at the species level.\u0000The mean genetic distance between genera within the family was 31.8-fold higher than the mean genetic distance within species.\u0000\u0000Abstract\u0000The Apogonidae is estimated to consist of nearly 300 fish species, most of which inhabit coral reef areas. The lack of distinctive body markings and overlapping species distribution makes species assignment challenging. Therefore, this study aimed to delineate species and establish barcoding reference databases of Apogonidae in Gilimanuk Bay (Bali, Indonesia) using the Cytochrome Oxidase I (COI) gene of the mitochondrial DNA. A total of 22 fish tissue samples were extracted with 10% Chelex solution. BLAST analysis was performed and genetic differentiation between species was calculated. The phylogenetic tree was constructed using the Maximum Likelihood method and tree visualization was generated using iTOL V5. The morphology and genetic identification results based on the mitochondrial COI gene revealed eight species of seven genera, and one species was new to GenBank online database. This study was the first-ever addition of COI sequence for Ostorhinchus hartzfeldii into the GenBank database. The average K2P genetic distance within species and K2P distance between genera within the family were 0.60% and 19.10%, respectively. The mean genetic distance between genera within the family was 31.8-fold higher than the mean genetic distance within species. The phylogenetic tree showed that each sample resided in a distinct cluster, which indicates that DNA barcoding is a reliable and effective approach for species delimitation in Apogonidae fishes.","PeriodicalId":17760,"journal":{"name":"Jurnal Ilmiah Perikanan dan Kelautan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41821477","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}

{"title":"Comparison of Accounting Profit Between Offshore and Deep-sea Commercial Fishing Industry in Pahang State, East Coast of Peninsular Malaysia","authors":"M. S. Sin, Lavaniya Gopabala Krishnan, S. Tai, A. Aziz, M. Kamaludin","doi":"10.20473/jipk.v15i2.42202","DOIUrl":"https://doi.org/10.20473/jipk.v15i2.42202","url":null,"abstract":"Highlight Research\u0000\u0000Economic performance of commercial fishing industry in Pahang State, East Coast of Peninsular Malaysia.\u0000Comparison of accounting profit between the two prominent fishing gear types: trawlers and purse seine in Pahang State\u0000Comparison of accounting profit between the different zones of fishing operations by the trawlers and purse seine\u0000Research findings showed that trawlers give more profit than purse seine vessels in Pahang State and overcapacity and over exploitation is distinctly found in Pahang State commercial fishing industry.\u0000This study suggested that other analysis such as biological performance by this study area should be done in future coupled with the analysis of impact of management policies on the sustainability of the fishery.\u0000\u0000Abstract\u0000Marine capture fisheries in Malaysia plays prominent role in economic growth and commercial fisheries makes great contribution to country’s economy. The commercial fishing industry in East Coast of Peninsular Malaysia are mainly operated by trawlers and purse seines which rises a major concern in managing and achieving the goal of sustainable fishery. This study aimed to account the differences of accounting profit level in commercial fishing industry in Pahang State, East Coast of Peninsular Malaysia. In this study, comparison of accounting profits using revenue and profit approach among trawl and purse seine fishery in two different zones: Zone C (offshore) and Zone C2 (deep sea) was carried out based on the intensive survey on fishing capacity and other economic factors. The survey was carried out with the commercial fishermen and total respondents of 156 fishers at landing port. The result showed that trawlers incurred low cost yet provided higher profit than doses by purse seine. Moreover, there are more trawlers vessels operating in the Pahang state fishing ground and the open access nature of the fishery like larger profit invites more effort to use in the fishery which is leading to the over exploitation of fishery resources and threatening the sustainable condition of the fishery. The findings of the research inform the possible impact of fishing profit to overcapacity in sustainable fishery management in Pahang State fishery.","PeriodicalId":17760,"journal":{"name":"Jurnal Ilmiah Perikanan dan Kelautan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48687752","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}

{"title":"Phytochemicals and Antioxidant Activity of Microalgae Dunaliella salina and Botryococcus braunii","authors":"A. Ridlo, D. Pringgenies, Ribka Anindita Br Perangin-angin, D. Ariyanto","doi":"10.20473/jipk.v15i2.36740","DOIUrl":"https://doi.org/10.20473/jipk.v15i2.36740","url":null,"abstract":"Highlight Research\u0000\u0000The methanolic extracts of  salinaand B. braunii contained alkaloids, steroids, triterpenoids, flavonoids, and saponins.\u0000Chlorophyll a, chlorophyll b, and carotenoids were most abundant in the ethyl acetate extracts of salinaand B. braunii.\u0000The maximum total phenolic content was observed in the n-hexane extract of  salina(61.28 mg GAE/g sample) and the ethyl acetate extract of B. braunii (46.94 mg GAE/g sample).\u0000The n-hexane extracts exhibited the highest antioxidant activity, whereas saponins were most abundant in the methanol extracts.\u0000\u0000Abstract\u0000Microalgal species such as Dunaliella salina and Botryococcus braunii are reportedly rich in natural antioxidants and phytochemicals. This study aimed to determine the phytochemicals and the antioxidant activity of D. salina and B. braunii. Microalgal samples were obtained from the Brackish Water Cultivation Fisheries Center (BPBAP), Situbondo, East Java. The extracts were prepared using the multilevel maceration method. The antioxidant activity of the algal species was analyzed using 1,1-diphenyl-2-picrylhydraxyl (DPPH). Quantitative analysis revealed that D. salina and B. braunii contained antioxidants, indicated by the appearance of yellow spots on the purple background of the TLC plate. The n-hexane extract of D. salina exhibited the highest antioxidant activity with a half-maximal inhibitory concentration (IC50) of 443.28 ppm, 61.28 mg GAE/g sample of total phenolics, 0.106 mg/g of chlorophyll a, 0.165 mg/g of chlorophyll b, and 1,697 mol/g of carotenoids. In contrast, the ethyl acetate extract of B. braunii exhibited the highest antioxidant activity with an IC50 of 634.55 ppm, 46.94 mg GAE/g sample of total phenolics, 18.146 mg/g of chlorophyll a, 12.592 mg/g of chlorophyll b, and 4573 mol/g of carotenoids. The microalgal species used in this study exhibited extremely weak antioxidant activity.","PeriodicalId":17760,"journal":{"name":"Jurnal Ilmiah Perikanan dan Kelautan","volume":" ","pages":""},"PeriodicalIF":0.0,"publicationDate":"2023-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48958984","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}