bluuebunny/crossref_metadata_2025 huggingface dataset:
Can organic soil ameliorant and foliar organic fertilizer improve maize yield and reduce inorganic fertilizers input in a dryland semiarid?
Authors: Jaya I K D , Suheri H , Wangiyana W
Published: April 2021

There is still room for improving maize yield and cultivation practices in dryland semiarid areas since the current production is still low and the inorganic fertilizers (IF) input is high. This study aimed to assess possible roles of a commercially available organic soil ameliorant (OSA) and foliar organic fertilizer (FOF) to improve maize yield and to reduce IF input in a dryland semiarid area. One experiment with seven treatments were tested, namely: (A) 100% of IF doses, that consisted of 500 kg of urea and 360 kg of NPK Phonska (15-15-15) per hectare, (B) Treatment A plus OSA and FOF, (C) 70% of IF doses plus OSA and FOF, (D) Treatment A plus OSA, (E) 70% of IF plus OSA, (F) Treatment A pus FOF, and (G) 70% of IF plus FOF. The size of each treatment plot was 10.1 m2 and there were 90 plants in each plot. All the treatments were replicated three times and were arranged in a randomized block design. The results showed that the IF treatment (A) produced 11.0 kg per plot, equal to 10.9 ton/ha. Adding OSA or FOF on top of IF (D and F), produced only 3% higher than the IF alone. However, when OSA and FOF were applied together with IF (B), the yield was 6% higher than the IF alone. The 30% reduction of inorganic fertilizer could not be replaced by both OSA and FOF (E and G) in producing yield. OSA improved soil nutrients, such as available phosphorous, potassium and C-organic but not the total nitrogen.
Ultrasound-assisted production of corn starch: Process design and optimization
Authors: Fathimah R N , Ishlahi A F A , Cahyanto M N , Setyaningsih W
Published: April 2021

Most starch industries utilize maceration as the extraction method to recover starch from corn matrices; however, the production is time-consuming and often inefficient. Ultrasound-assisted extraction (UAE) appears to propose an enhancement of the extraction process. Hence, in this study, UAE has been developed to reach an optimum recovery in a short extraction time for starch obtaining from corn grain. Several extraction variables were studied, including ultrasound power (x
1, 30-90%), cycle (x
2, 0.3-0.9 s−1), and solvent to sample ratio (x
3, 10:1-30:1 g ml−1). A Box-Behnken design, coupled with Response Surface Methodology, was performed to optimize the three studied variables. The acquired mathematical model was used to estimate a predictive equation for the extraction yield. The model was validated based on an acceptable coefficient of determination (R
2, 0.88), a low mean absolute error, and the value of lack-of-fit suggested that the model was adequate in explaining the observed data at the 95.0% confidence level. The predicted optimum yield was achieved by applying UAE conditions as follows: 87% ultrasound power, 1.0 s−1 cavitation cycle, and 30:1 solvent to sample ratio. Additionally, a two-cycle extraction process of 5 min for each cycle was chosen over a single extraction cycle in 25 min. The resulting corn starch produced by UAE could maintain the low viscosity even in high temperatures. Hence, apart from accelerating the extraction, UAE was also useful to modify the starch characterization. Moreover, the proposed method demonstrated a green extraction procedure, as there was no presence of any additional organic solvent.
Postmortem diagnosis characteristics of probable covid-19 victims by rapid molecular testing
Authors: Syamsun A , Kadriyan H , Andiwijaya F R , Hunaifi I , Lestarini I , Sari S K , Mahaputra H , Setia and B
Published: April 2021

The capacity to establish the diagnosis among probable COVID 19 cases is limited, moreover, in death cases. Rapid molecular test (RMT) could be an alternative for establishing the definitive diagnosis in mortality cases, furthermore, management of bodies can be carried out in hospitals so as not to pollute the environment. The study was conducted in 6 hospitals and 10 primary health care centers in Mataram, West Nusa Tenggara from March 25th to August 5th, 2020. Nasopharyngeal swab post-mortem was done between 1-12 hours post-somatic dead in patients who were diagnosed with probable COVID-19. RMT was performed by GeneXpert Cepheid with cartridge Xpert Xpress SARS-CoV-2. The identification procedure was done by following the guideline in the manual procedure of the cartridge. The result of RMT will be positive or negative depending on the View Results Window of the GeneXpert System. There were 33 post-mortems nasopharyngeal swab samples that fulfill the criteria in the study period. Thirteen (39,39%) were positive for SARS-Cov-2. Most of the positive sample was taken 1-4 hours after somatic death, followed by 8-12 hours after somatic death consecutively 11 (84,61%) and 2 (15,38%). Among the positive cases, most of them were female, the age more than 60 years old, and owing to hypertension and cardiovascular disease as a comorbid sequentially 8 (61,53%), 8 (61,53%), and 5 (38,46%). RMT could be used as an alternative to identify the SARS-CoV-2 genetic material in the somatic dead patient until 12 hours post-mortem, however, the best time for taking a swab sample should be 1-4 hours post-mortem.
Antioxidant activity of seaweed (Eucheuma cottonii) and coconut (Cocos nucifera) masks
Authors: Ulfa A M , Lukman I R , Widiyanti B L , Hartini H , Hilmi A , Darmawan M I
Published: April 2021

The processing of agricultural products is one of the pillars of the development of agro-industry in an area. In LabuhanKertasari Village, the main products from the agricultural sector are seaweed, hybrid maize, and coconut. However, farmers only sell agricultural products in the form of raw materials without processing them first. Processed products certainly have a higher economic value than raw materials. For this reason, this research was conducted to process seaweed and coconut into masks which were then tested for the antioxidant activity of the masks that were processed. The research conducted was a laboratory experimental study where seaweed and coconut were first processed into a powder. The treatment given is processing seaweed into powder with an alkaline process and without an alkaline process. Then, mixing seaweed powder and coconut powder with three ratios, namely seaweed powder: coconut powder (1: 1, 2: 1, 3: 1). The results showed that the antioxidant activity of the masks 1: 1, 2: 1, 3: 1 were 743,9 respectively; 513.69; and 406.23 (with alkaline seaweed powder) and 193.67; 174.09; and 149.10 (with seaweed powder without alkalization). The result showed that a mask with a ratio of 3: 1 without the alkalization process is the mask with the highest antioxidant activity value and suitable for the skin.
Isolation of artelasticine for student practice in low-resource laboratory settings
Authors: Hakim A , Jufri A W , Jamaluddin
Published: April 2021

The isolation of secondary metabolites can be used by students for laboratory activities in the natural product chemistry course. The laboratory experience of isolating secondary metabolites will be useful for students to isolate secondary metabolites in other plant species whose chemical content has never been reported. In this laboratory the student isolated artelasticine from Artocarpus scortechinii. Students learn about extraction, fractionation, purification, and structural elucidation through the natural product chemistry laboratory activities. Various chromatography techniques are used to obtain pure artelasticine compounds. The artelasticine structure was determined based on UV, IR, 1H-NMR and 13C-NMR spectroscopic data. The laboratory method allowed students to readily understand the process of isolating artelasticine.
Utilization of information technology for learning in Covid-19 disaster conditions
Authors: Kumalawati Rosalina , Murliawan Karnanto H , Yuliarti Astinana , Kartika Norma Y , Noermelani Ellyn
Published: April 2021

The learning process during pandemic Covid-19 is done online to suppress the spread. The current pandemic conditions the role of information technology is significant in online learning. The purpose of this study is to find out “Utilization of Information Technology for Online Learning in Covid-19 Disaster Conditions”. This research uses qualitative and quantitative surveys. Data sources are lecturers and students in the Geography Study Program at Lambung Mangkurat University. Online learning here uses e-Learning, Google Class, WhatsApp, Zoom, other information media and internet networks that can connect lecturers and students. The findings of this study are that information technology strongly supports the success of online learning in Covid-19 disaster conditions. The limitations of this study limit the information technology understudy and define the learning process during the Covid-19 pandemic in certain subjects. The results showed that the use of information technology is significant to support the success of online learning in Covid-19 pandemic conditions. The most widely used are E-learning and Watsapp. Whatsapp is most effective used as a medium in online learning because it does not require large quotas and good signals. The obstacles are some students in remote areas, and the ability to buy a variety of quotas.
The Citarum River as our front yard: A case of community engagement in Bintang Alam, Indonesia
Authors: Kristanto Gabriel A , Pratama Mochamad A , Nandhita Paras A C , Kemala Dini , Munif Abdurrahman , Ahmad Divia A
Published: April 2021

Indonesia is facing not only a severe problem of solid waste management and river sustainability but also a lack of community awareness in managing the environment. This paper explores community engagement activities conducted in Bintang Alam, Karawang, Indonesia, to improve the community concern regarding the Citarum River, which is located close to the community under study. This community of Bintang Alam has been involved in constructing a trail along the river to provide a shortcut from a housing complex to the nearest mosque and planting fruit trees along the riverbank. The waste composition was analyzed by Indonesia Standard of SNI 19.3964.1994. To reduce the amount of waste disposed of in the river and landfills, the residents favor the development of a waste bank. Eight months of observation documented excellent progress in residents’ awareness of the importance of managing the trail, eliminating waste disposed of along the river banks, but no improvement in developing a waste bank. It has been suggested that community engagement involving multiyear grants might make more continuous advocacy in the community possible. The characteristics of funding, which is in the form of a grant with a prescribed deadline, often hinder sustainable advocacy.
The water use for batik production by batik SMEs in Jarum Village, Klaten Regency, Indonesia: What are the key factors?
Authors: Handayani Widhi , Widianarko Budi , Pratiwi Alberta R
Published: April 2021

The Indonesian batik is a potential product to support the economy of Indonesia. In spite of its potential in supporting the economy of Indonesia, the water pollution caused by batik production by Small & Mediuam Enterprises (SMEs) needs to be addressed, as it leads to water scarcity since the batik production tends to consume a huge quantity of water. This research was conducted to identify key factors that influence water use for batik production among batik craftsmen, and explain those factors using the concept of circular economy. This study was conducted using qualitative method through focus group discussion (FGD) and in-depth interview as data collection strategies and quantitative data collected as secondary data. Our study found that some practices of the batik craftsmen have shown to fit to the circular cycle, although the dischargement of wastewater into waterways still fits to the linear model. Using secondary data, the direct water use for batik production were varies from 3.33 L/pc to 235 L/pc, depending on the craftsmen. If water footprint approach is to be used, the water use will be much higher. Finally, four key factors affecting the water use are discussed in this study and efforts that can be proposed to reduce the ratio water/product as well as maintaining water as a resource, as indicated by circular economy.
Mapping of solid waste generation and collection by using GIS: A case study in Depok City
Authors: Majid Amelia , Novita Evy , Gusniani Irma , Hartono Djoko M
Published: April 2021

Waste treatment facility, known as UPS, in Depok City is one of component in waste treatment for handling organic waste. However, carrying capacity of UPS and its ability to process of organic waste from citywide were low although 30 unit of UPS has been built over the years. The objective of this research was to map current practices and projections on waste and organic waste generation, and current organic waste collection services coverage area as well as to assess the service level of UPS at each sub-district. The amount of waste generation in 2018 is approximately 594,450 tonnes/year and projected will increase up to 886,589 tonnes/year. The organic waste fraction was projected 44% and will grow at a rate 3.9%/year in the period of 2018-2028. The amount of organic waste in 2018 is approximately 272,850 tonnes/year and increased up to 390,098 tonnes/year in 2028. Each resident projected will generate organic waste at about 118 kg/capita/year. The results showed that Cimanggis and Sukmajaya were sub-districts with the highest amount of waste and organic waste generation. Nonetheless both were having only one UPS and smallest collection services coverage area as well as high number of populations to be served for each UPS. Organic waste collection service coverage area can be distinguished by 2 schemes which were local and municipal services. It is found out that 22 UPS served for local services and 8 UPS served for municipal services. Each UPS covered averagely 16% of each total area.
MASW for the microzonation of earthquake hazard in Banjar City, West Java, Indonesia
Authors: Muzli Muzli , Kambali Retno A P , Rohadi Supriyanto , Rachman Asep N , Nugraha Jimmi , Susilanto Pupung , Sulastri  , Pakpahan Suliyanti , Setyonegoro Wiko , Florida Nelly R , Karnawati Dwikorita
Published: April 2021

Efforts to reduce the impact of earthquake disaster have been made by the government, continuously. To decrease the casualties, an effort to be done is to construct housings and public infrastructures following the earthquake-resistant role or building code, especially in cities with high vulnerability and population. For this reason, an earthquake hazard microzonation map is crucial. Microzonation of earthquake hazard in Banjar City, West Java, Indonesia, was conducted by mapping the surface soil classification. Banjar is an essential city in West Java, connecting Bandung and the cities in the southern part. The microzonation mapping was done using the MASW (Multichannel Analysis of Surface Waves) method. The fieldwork of Vs30 measurements has been conducted in February 2020. We recorded 31 MASW sites in the entire Banjar City area with the distance between the locations approximately 5km. The results of this study indicate the surface soil classification in Banjar City in detail and precisely. The eastern part of the city shows a relatively softer surface soil structure compared to the western part. Comparison of the microzonation map obtained from the measurements with empirical Vs30 map (average shear waves velocity down to 30m), geology structure, and topographic data, showing good agreement. The earthquake microzonation map is recommended to be considered one of the references for developing the building code.
Analysis vegetation change on coal mine reclamation using Normalized Difference Vegetation Index (NDVI)
Authors: Juanda Endy T , Martono Dwi N , Saria Lana
Published: April 2021

Vegetation cover is a critical indicator and sensitive in degradation land. This study aims to explore the comparative analysis of vegetation index in the ex-mine reclamation area. The study is conducted on 2.03 ha area reclamation planted in 2017. The analysis is performed by measure Normalized Difference Vegetation Index (NDVI) from 2017 to 2020 using the Sentinel-2 satellite imagery dataset and processed by ArcGIS Pro 2.6 software. RGB drone photogrammetry acquired in April 2020 and vegetation photos featured with geotagging is used to validate vegetation index analysis. The result shows NDVI first and second-year revegetation demonstrates no significant improvement (less than 0.33), nevertheless third and fourth-year revegetation shows dramatically increase of NDVI, respectively 0.369 and 0.417 with the percentage of healthy vegetation 68.13% and 81.39%. This shows that NDVI and the percentage of vegetation health improve over the year.
Environmental preservation and sustainability of natural resources through traditional adat value (Study case Kampung Naga, West Jawa)
Authors: Asteria Donna , Brotosusilo Agus , Soedrajad M R , Nugraha F N
Published: April 2021

Technological, social, and cultural developments are gradually becoming more complex and transforms, which is give implications in various systems, such as economics, social, and political. That implication not only brings benefits but also harms the environment. In the pressure of that development, traditional adat values, and the uniqueness of local culture in Indonesia bring another perspective of the environment. This study will discuss conservation studies carried out by the people of Kampung Naga in Tasikmalaya, West Java, from environmental preservation and the sustainability of natural resources as a form of local wisdom implementation. From that local perspective, there are other ecological guidelines can utilize in term of sustainable natural resources. Ecological guidelines should require specific information for their use, should include precise instructions that can be followed and corporation with socio-economic restrictions on the conservation of biodiversity. Through the local culture and traditional adat values, ecological guidelines can bring environmental preservation and natural resource sustainability.
Actor-Network and Non-Government failure in Jakarta flood disaster in January 2020
Authors: Rahmayanti Krisna P , Azzahra Salma , Arnanda Nadia A
Published: April 2021

This research aims to discuss actors’ network in handling flood disasters in DKI Jakarta in January 2020. With the increasing number of disasters globally and in Indonesia, the discussion about non-government actors’ role in disaster response is relevant to disaster management studies. Disaster response, as one of the disaster management phases in the case of flood disasters, is crucial for reducing the impact of a catastrophe and increasing the public sector’s resilience and society after a disaster happens. This research was conducted with mass-media content analysis, using the keyword “DKI Jakarta flood” to collect published news between 1-6 January 2020. Then, the collected news was analyzed with Discourse Network Analyzer. The analysis found that there were contributions from both government and non-government. Food support is the most common type of contribution that was chosen for disaster management assistance. The private sector and community organizations were the non-state actors that played a huge part in post-disaster aid. Although there are roles of non-state actors in disaster management, there are obstacles in its implementation. Some of those are unsupportive regulation, the absence of an institutional framework, and various actors’ commitment to collaborative disaster management.
Reach sustainability through Corporate Social Responsibility (CSR)
Authors: Ismail Yunita
Published: April 2021

The utilization of natural resources and the environment to improve the community’s welfare is an unavoidable choice. The environment used should still protect the environment. This study aims to provide an overview of the company’s efforts to implement its obligation to preserve the environment using a different type of Corporate Social Responsibility (CSR) program, which were community development and green marketing. The method used was a survey by taking the population at two different places, Jakarta and Pangkal Pinang. The sampling technique was done using a purposive method to obtain samples that meet the company’s CSRreceiver’s criteria. The number of the respondent from the first population is 44 respondents and from the second population is 100 respondents. Data analysis was done using simple and multiple linear regression. The results showed that CSR’s implementation had a significant impact on education, health, and poverty reduction. CSR activity by the company was accepted by society activities directly in the form of counseling and mentoring. CSR activities conducted on marketing activities by implementing Green Marketing found that pricing and promoting an environmentally sound positive impact on consumers’ willingness to buy back the product. In contrast, the product is not significantly influential.
Assessment of local economic development and its factors to improve welfare in the several regions in Indonesia
Authors: Rokhim Rofikoh , Wulandari Permata , Wahyuni Sari
Published: April 2021

This paper has developed a model in assessing local economic development performance by utilizing primary data collected from 3 regions in Indonesia using a participatory approach of 304 respondents in Singkawang, Bau-bau, and Kupang. It is observed that to achieve the local performance model, and divided by two different models. First is the human resource, infrastructure, social capital, and financial capital that positively impact entrepreneurial strategy. While institutions, technology, local government, and central government have no impact on entrepreneurial strategy. Second is entrepreneurial strategy has a positive impact on local economic development (local performance). Findings also revealed that all impact is positive, aligning with the existing literature of local economic development in developing countries.
Community garden as a way to achieve neighborhood scaled food security
Authors: Kusumanagari Indira , Ellisa Evawani
Published: April 2021

Nowadays, it is increasingly difficult to find numerous green spaces in a city. This situation caused the conversion of green land into a built area, resulting in a lack of interaction between humans and nature. One form of urban greenery that can be easily created and brings many benefits to humans is community gardens. Community garden utilizes vacant lots to create multi-functional space for the people—gardener and non-gardener. Literature and precedent studies are conducted to understand how community gardens work as a social space that produces crops as a base knowledge to analyze the following study case. This study focuses on observing the realization of food security in a community garden at Malang, Indonesia, named Cemara Hijau Farm. The community garden uses most of its planting area for functional and active food production. However, it is still in the early stages of food security and still has not met the community’s food needs on a housing scale, as can be seen from the production and the arrangement in the planting area. Even so, existence can increase public awareness of the importance of food security.
Gender role in climate change adaptation on the peat swamp ecosystem in Pulang Pisau Regency Central Kalimantan
Authors: Marlina Sari , Lautt Bambang S , Usup Aswin , Sunaryati Revi
Published: April 2021

Climate change has the most severe impact on women, but studies on adaptation in a gender perspective are still limited. The purposes of this study were to find out: (1) gender role changes in response to climate change, and (2) the impact of gender role changes on the vulnerability of women. This study was conducted on the peat-swamp ecosystem in Pulang Pisau Regency, Central Kalimantan. Gender roles in natural resource management in adapting to climate change in the peat-swamp ecosystem were descriptively qualitatively analyzed which emphasized relations and gender roles in the household. Data were collected using structured questionnaires. This study used documentation methods with secondary data types. From the results of the study, it can be seen that the gender role of women is divided into three, namely productive roles, reproductive roles, and social community roles. Climate change in Pulang Pisau Regency will interact and be sustainable with gender inequality and which disadvantages women than men, especially among the poor community, so that access to the availability of natural resources is needed in order to solve existing vulnerabilities and increase more real participation in the current climate change adaptation process.
The impact of loan to value to property credit growth sustainability in Indonesia
Authors: Taufik Agus , Soesilo Nining I
Published: April 2021

After the 2008 global financial crisis triggered by the subprime mortgage in the United States, financial services authorities in various countries increasingly realized that surveillance and regulation of financial institutions were not enough only through micro-prudential approach, which intended to maintain individual financial institutions, but required macro-prudential surveillance and regulation in maintaining financial system stability. The macroprudential policy aims to limit systemic risks occurring in financial distress conditions that lead to broader economic losses. One of the macro-prudential policy instruments applied by the financial services authorities in various countries, including Indonesia, is the Loan-to-Value ratio limitation. This countercyclical policy is intended to control the rate of growth in property credit. This paper discusses the effects of limiting the Loan-to-Value (LTV) ratio by Bank Indonesia on the growth of bank property credit in Indonesia. Using ordinary least squares, the results of this study conclude that adopting a tightening LTV policy when economic growth high has a significant influence in holding back the pace of five months of property credit growth after the policy was issued. While the LTV policy’s implementation, which is loosening when economic growth is slowing down, has no significant effect in driving the pace of property credit growth.
Perceived threats looming on SDG of peace and justice: Effects of investor’s identity, symbolic and economic threats on attitudes towards FDI
Authors: Adira Neysa , Halida Rizka
Published: April 2021

Foreign investment has always been a polemic in Indonesia, facilitated by provocative undertones on several media outlets. However, how this information can influence people’s attitudes towards foreign investment has not been explored much. This research aimed to understand how foreign investment information from different countries could trigger threats and, consequently, influence people’s attitude toward foreign investment with the framework from Integrated Threat Theory and information processing. As much as 559 participants participated in an online experimental survey. They were randomly grouped into six experimental groups with 3 (investors cue: China, Saudi Arabia, US) x 2 (threat: symbolic, economic) and one control group. Mediation analysis showed exposure to threat laden information influenced the formation of negative attitudes towards foreign investment through systematic processing by activating economic and symbolic threat perceptions. This effect significantly appears on participants exposed by information containing the economic threat and symbolic threat from China, but not from Saudi Arabia and the US. This result indicates that support towards foreign investment is still heavily related to sentiment to Chinese ethnicity deeply rooted in Indonesia which can hinder the goals towards establishing peace, justice and strong institutions.
The effect of accessibility and availability of health infrastructure on maternal healthcare utilization in Indonesia to achieve Sustainable Development Goals
Authors: Puspitasari Dian Ayu , Omas Bulan Samosir
Published: April 2021

The first goal in Sustainable Development Goals (SDGs) 3 aims to reduce maternal mortality and provide equitable access to maternal health care. High maternal mortality rates are often associated with inadequate maternal healthcare service utilization. The utilization of maternal healthcare services in Indonesia shows variations between provinces, allegedly influenced by each province’s contextual factors. This study investigates the association between accessibility and availability of health infrastructure with maternal healthcare service utilization. The multilevel logistic regression method was used to test the hypothesis that the accessibility and availability of health infrastructure were associated with maternal healthcare service utilization. This study indicates that the characteristics of the region where women live have a significant effect on maternal healthcare service utilization. The average distance to the nearest hospital is significantly associated with the three dimensions of maternal healthcare services. The farther the distance to reach the nearest hospital, the propensity for women to utilize maternal healthcare services will decrease. Therefore, to reduce disparities between regions in maternal healthcare service utilization, one of the interventions that can be carried out is shortening the distance to health facilities so that access to health facilities becomes more accessible than before.
Strengthen the critical roles of women in urban environmental preservation with social protection program
Authors: Asteria Donna , Nabila Siti H , Negoro H A , Soedrajad M R , Utari Dyah
Published: April 2021

Ease of access for people to be involved in urban environmental preservation is an important factor in overcoming the current problem of global warming and environmental degradation. The gender responsive with social protections program became of efforts to support women to be involved in environmental preservation and climate change adaptation. Efforts to strengthen the community, including vulnerable groups, must be made to maintain urban resilience. The aim of this study to describe the importance of strengthening the involvement of women in environmental preservation activities through social protection programs. This study was conducted with a qualitative approach using literature reviews, with combined type of the descriptive and integrative literature reviews. The results of the study indicate that the social protection program is complementary in environmental preservation activities. In addition, social protection programs are aimed at strengthening women as a vulnerable group so that they can adapt to global warming and improve community welfare through environmental preservation activities. Efforts to strengthen women in preservation activities are related to ecosystem-based management approaches, which also emphasize aspects of stakeholder support in environmental protection activities. This study has a contribution as an alternative capacity building in environmental protection policies with gender responsive approach.
Sustainable tourism development strategy in Bintan Regency based on Tourism Area Life Cycle
Authors: Kedang Ruth N M , Soesilo Nining I
Published: April 2021

Bintan Regency is regarded as a significant potential tourist destination. The tourism sector has already been developing quite rapidly there in recent years. This study examines its stages of tourism development based on Butler’s tourism area life cycle model. Identification of the stages was made by looking at the characteristics of various criteria: destination characteristics, marketing response, economic impacts, social impacts, and environmental impacts. The stage identification result shows that this district is in a “development” phase. Using this result, we generate a strategy for pushing Bintan Regency to the next stage in the TALC model. The AHP model was developed as a decision support system to determine a priority strategy based on experts’ assessment of tourism development in the Bintan district. From the analysis, we found that economic and social criteria have a more significant impact on the regency’s development. Meanwhile, security and safety improvements and quality of service improvements must become higher strategic priorities. They were also regarded as being the most important strategies to develop the tourist areas of the Bintan Regency during the “consolidation” stage.
Preliminary study of dietary Muntingia calabura leaf on the hematology status of Clarias sp
Authors: Febrianti D
Published: April 2021

Muntingia calabura has antibacterial, antioxidant, and anti-inflammation properties including the leaf and fruit, but has not been explored its effects as feed additive on the hematology status of fish. This study was conducted to determine the effect of different dose of M. calabura as a feed additive on the hematology profile of Clarias sp. The research design used in this study was a complete randomized design with five treatments and four replications. Five types of diet were prepared by mixing dried powder M. calabura leaf with commercial feed manually, using egg white as a binder. The doses of M. calabura in feed were 0 g kg−1 (KN), 5 g kg−1 (M1), 10 g kg−1 (M2), 20 g kg−1 (M3), 40 g kg−1 (M4). The fish was fed three times a day for 14 days. The results showed there was a change in the total red blood cells (RBC), total white blood cells (WBC), haemoglobin (Hb), and hematocrit (Hc) levels during treatments. In the end of the observation, the highest WBC were in treatment M2 (169 ± 21.378 x 107 cells mL−1), while the highest RBC was in treatment M1 (365 ± 118.216 x 107 cells mL−1). The highest Hb and Hc level were occurred in treatment M3 (8.600 ± 0.265 g dL−1) and treatment M4 (65.333 ± 9.609 %), respectively.
Antioxidant and antimicrobial potency of Eupatorium inulifolium leaf extract for fish preservation
Authors: Muhammad D R A , Miraningrum D T , Parnanto N H R
Published: April 2021

Fish is generally known as a perishable product. This study aimed to investigate the antioxidant and antimicrobial potency of Eupatorium inulifolium leaf extract for fish preservation. The effect of different levels of the leaf extracts (0.1%, 0.25%, 0.5%) on the pH value, aw, Total Volatile Bases (TVB), Total Plate Count (TPC), and texture of tongkol fish (Euthynnus Affinis) during 4 days cold-storage was studied. The results showed that after 4 days of storage, the level of TVB was found at 28,745 mg/100 g in the control sample and 16,022 mg/100 g in the sample of fish with 0.5% of Eupatorium inulifolium leaf extract. On the last day of storage, the lowest number of microbe was found at 10.100 CFU/g in a sample of fish with 0.5% of Eupatorium inulifolium leaf extract while the highest number of microbe was 53,500 CFU/g in the control sample. The addition Eupatorium inulifolium leaf extract resulted in a harder texture. On the contrary, the Eupatorium inulifolium leaf extract addition had no significant effect on the aw value of the fish during storage. This study provided a new perspective of using Eupatorium inulifolium leaf extract for a natural preservative for fish.
Suitability of ecotourism in Tunda Island Serang Regency Banten Province, Indonesia
Authors: Mujiyanto  , Sugianti Y , Purnamaningtyas S E , Sutrisna  , Rahmawati A , Indaryanto F R , Nurfiarini A , Tjahdjo D W H
Published: April 2021

The highest tourism frequency at Tunda Island is provided a positive effect on community livelihood, but the activities of tourism behaviour are not environmentally friendly which would affect nature and also can make habitat degradation in the coastal area. There was no specific research until now regarding the condition of suitable marine tourism in Tunda Islands as ecotourism areas. This research aims to analyze the suitability aquatic area to plan an ecotourism area in Tunda Island, Serang Regency. The research method used a purposive sampling method and it was conducted in July to September 2019. The results obtained showed that the highest suitability index on coastal tourism potentials (recreation) was 76.2% (very suitable), mangrove tracking was 12.8% (unsuitable), snorkeling tourism was 54.4% (suitable), and dolphin watching was 57.6% (suitable). Tunda Island has developed potential tourism that is promising, but it still needs some infrastructure procurement and facility improvement to support tourism activities. The ecotourism potential has a high sell point but its poor data is in dolphin watching. It would be temporal data with at least one-year sampling by carrying out the sampling for every month.
Assessment of marine warming in Indonesia: a case study off the coast of West Sumatra
Authors: Azis Ismail M F , Gerhaneu N Y , Yulihastin E , Ratnawati H I , Purwandana A
Published: April 2021

Over recent decades, warming events in the tropical Indian Ocean (IO) have been documented in both the western and eastern IO. However, the manifestation of marine warming events in the Indonesian waters is still lacking in information. This paper presents the first case study of long-term warming events and short-term extreme warming events off the coast of West Sumatra using Sea Surface Temperature (SST) data covering 37 years (1982-2018). A statistical climate toolbox is applied to quantify the marine warming rates, including Marine Heatwaves (MHWs) identification. Decadal trends in marine warming are positive across the study region indicate significant warming rates with the average value of about 0.15°C decade−1. In line with the long-term marine warming, MHW events off West Sumatra has been revealed to be increasing in its occurrences, duration, and intensity. Much of this significant increase in MHW properties has occurred during the period 2015-2018. The MHW events off West Sumatra appear to be influenced by El Niño Southern Oscillation (ENSO), particularly during strong El Niño and La Niña periods. These marine warmings trend and MHW events have never been documented and quantified before in the waters around West Sumatra.
Growth of Nannochloropsis oculata in shrimp cultivation waste at difference N:P ratios
Authors: Nisa K , Mubarak A S , Sulmartiwi L
Published: April 2021

Shrimp culture waste contains high nutrients, namely N2, P2O5, K2O and has the potential to be used as organic fertilizer. Shrimp waste has a low N:P ratio so that it does not support microalgae growth, N:P needs to be adjusted for microalgae growth. The purpose of this study is determine the optimal N:P ratio in shrimp waste fertilizer which produced the highest growth ofNannochloropsis oculata. Method in this research is an experimental method. Completely Randomized Design (CRD) with 6 treatments and 3 replications. Treatment of shrimp waste fertilizer was used with different N: P ratios, N:P ratios of 10.5:1, 15.5:1, 20.5:1, and 25.5:1, namely : Walne fertilizer, N:P ratio 17:1 and Shrimp waste fertilizer with a ratio of N:P 5.9:1 is the control. Cultivation ofN.oculatauses an initial density of 105cells/mL, with light intensity ranging from 5.010-5.622 lux for 24 hours and lasts for seven days. Data analysis was processed used ANOVA then with DMRT. The results of this study had a significantly different effect on the population and growth rate ofN. oculata. The exponential phase highest population mean of 965x104cells/mL and the growth rate of 135x104cells/mL/day.
Business analysis of vaname shrimp (Litopenaeus vannamei) culture in traditional ponds with monoculture system in Sedati, Sidoarjo
Authors: Husada R H S Y , Sari L A , Sahidu A M
Published: April 2021

This study was aimed to analyze the culture business of vaname shrimp in a traditional pond with a monoculture system in Sedati, Sidoarjo, East Java, Indonesia. The study location was chosen intentionally (purposive) as considered to be one of the production locations of vaname shrimp (Litopanaeus vannamei) in Sidoarjo Regency. This study used a descriptive method. Data were collected through an observation method. The business analysis results showed that the monoculture system of vaname shrimp in Sedati was feasible to be developed and implemented. This can be seen based on the income value with IDR 30,048,939. The R/C ratio value was 1.86. The PP value was 3 and BEP value was IDR 13,345,778. The producer surplus received by vaname shrimp farmers in Sedati District per hectare of ponds reached IDR 22,283,561/year, therefore the total economic value of vaname shrimp monoculture in Sedati with 143 ha pond area reached IDR 3,186,549,167/year.
The study of live and frozen marine fish in commodities imports using conventional and the Polymerace Chain Reaction (PCR)
Authors: Sukmawati A R , Pursetyo K T
Published: April 2021

Indonesia has big potency of fishery which has entered in export-import market. That export-import activitiy isn’t balance with quality warranty and the quality assurance. The quality warranty and the quality assurance are important because there found bacteria which have zoonotic characteristic. The method of data collection consisted of primary data and secondary data. Data collection was carried out with active participation, observation, interview and literature. Conventional method was used for bacterial examination on a live fish. The use of this method started from the initial isolation, purification, base test, biochemical test and the last was identification process. Bacteria found in a live fish by using the conventional method are Pasteurella haemolytica, Acinetobacter sp, Aeromonas hydrophila, Pseudomonna maltophilia, Pseudomonas sp, Vibrio sp, Pseudomonas mallei, Plesiomonas sp, Alcaligenes sp and Pseudomonas aeruginosa. Polymerace Chain Reaction (PCR) method was used for bacterial examination in frozen fish. This method had many steps, there were extraction, amplification, electrophoresis, and the last was reading the result with UVdoc machine. Primer which was provided that was used to diagnostic DNA bacteria of Aeromonas salmonicida and Edwardsiella tarda. During the study no bacteria of Aeromonas salmonicida and Edwardsiella tarda found, in frozen fish by PCR method.
Marine Leech Zeylanicobdella arugamensis Infestation As A Predisposing Factor For Vibrio alginolyticus Infection On The Hybrid Grouper “Cantang” (Epinephelus fuscoguttatus x Epinephelus lanceolatus) From Traditional Ponds In The Kampung Kerapu Lamongan East Java Indonesia
Authors: Suyanti E , Mahasri G , Lokapirnasari W P
Published: April 2021

Marine leech Zeylanicobdella arugamensis is one of the ectoparasites that can infest grouper fish, causing wounds on the place where it is attached, so that it can act as a predisposing factor for secondary infection by pathogenic bacteria such as Vibrio alginolyticus .The purpose of this study was to determine Z.arugamensis marine leech infestation as a predisposing factor for V.alginolyticus infection on the Cantang grouper from traditional ponds in the kampung kerapu lamongan. This research is a transversal survey and data analysis using Pearson correlation. Observations were made in the Laboratory of Anatomy and Fish Culture, and the examination of bacteria was made by conventional methods at BKIPM Juanda Surabaya. Based on the results obtained, 17 of 30 Groupers were known to be infested marine leech. Meanwhile, 5 infested fish were positive for V.alginolyticus with a TPC calculation of 0.12-2.13 × 104 CFU/ml.. This moment indicates that Infestation of the parasite Z.arugamensis can act as a predisposing factor for the occurrence of V.alginolyticus bacterial infection because there is a positive correlation, that is, the higher the amount of Z.arugamensis infestation followed by the TPC Vibrio sp.
The utilization of whiteleg shrimp (Litopenaeus vannamei) aquaculture wastewater in semi-mass Nannochloropsis culture
Authors: Samara S H , Santanumurti M B , Firmansyah A , Hudaidah S , Putri B
Published: April 2021

Nannochloropsisis a microalga that is used as feed and can be cultured intensively. One of the obstacles in its culture is high-cost production. Innovations that can be applied to overcome this problem is the utilization of wastewater from whiteleg shrimp (Litopenaeus vannamei) aquaculture. The purpose of this study was to assess the population growth ofNannochloropsissp. culture by using wastewater of whiteleg shrimp with different densities in a semi-mass culture. The research design used in this study was a completely randomized design with four treatments and three replications, namely treatment A (2.5 x 106ind/ml), B (5 x 106ind/ml), C (7.5 x 106ind/ml), and D (10 x 106ind/ml). The parameters measured were population density, nitrate, phosphate, pH, temperature, salinity, and light intensity. The results showed that the utilization of wastewater from whiteleg shrimp culture had a significant effect on the population growth ofNannochloropsissp. Treatment A showed the best result with an increase in density by 119% (2.5 x 106ind /ml to 5.49 x 106ind/ml) at the adaptation phase, and 1012% (2.5 x 106ind/ml to 27.8 x 106ind/ml) at the exponential phase.
Business sustainability of fisheries utilization in Padang
Authors: Huda H M , Firdaus M , Mira  , Suryawati S H , Sari Y D , Kurniawan T
Published: April 2021

Padang is one of the centers of economic growth in the West Coast of Sumatra. Its position in the coast makes Padang as the entrance of fish resources to fulfil the needs of fish in Padang and its surrounding areas. The purpose of this study is to analyze the level of utilization of fish resources in Padang, especially from the aspect of business sustainability. The data analysis was done descriptively describing the performance of the fishing business that landed fish in Padang. The results of the analysis show that various types of fishing gear that landed fish in Padang still provide business benefits so that business sustainability continues. The availability of fish landing facilities and better fishing needs is expected to increase the efficiency of fishing effort and improve the quality of the fish catch landed so that it has a higher selling value.
Economic benefits of fisheries activities in Jatibarang Reservoir, Central Java
Authors: Triharyuni S , Aisyah
Published: April 2021

Inland fisheries are categorized as small scale fisheries. Those small-scale fisheries are frequently under-valued social and economically. Likewise with Jatibarang Reservoir that is included in it. Whereas the intensity of the use of the reservoir by the local community is very high. Although according to local wisdom, the use of Jatibarang Reservoir is only limited to handline fishing, it is thought to have a good impact on the economy of the community and the reservoir environment. The study was carried out during the period of 2018, with the aims to determine the economic impact of the fisheries sector even though there are restrictions on the types of fishing gear used in the Jatibarang Reservoir. By using the Contingent Valuation Method in estimating the value of consumer surplus through the use of several parameters such as annual income, expenditure and number of fishing days. The results show that the handline fishing activities in the Jatibarang Reservoir are still achieved the economic benefits or in other words, the net benefit value shows a surplus.