bluuebunny/crossref_metadata_2025_split huggingface dataset:
Assessing urban agriculture’s development in Central Jakarta
Authors: Jap Janice Jacob , Soesilo Tri E.B. , Tumuyu Sri S. 
Published: April 2021

Abstract
In Central Jakarta, grassroots movements and government institutions have implemented several households and community-scale urban agriculture (UA) initiatives to improve urban food security. However, there is a gap between the bottom-up initiative and formal support from policy planners. This study proposes system dynamics modeling as a viable approach to assess food production’s diverse reality in an urban context. We seek to analyze UA’s contribution to sustainable urban development in Central Jakarta through UA modeling. We developed our model’s structures from our UA practice findings that we gathered from questionnaires, focus group discussions, and field observations. From therein, area of productive green open space, social cohesion from social interactions from farming activities, and potential savings from growing foods were identified as main driving factors of the model, whereas land limitation was identified as a limiting factor. An intervention scenario was simulated to achieve Jakarta’s 2018-2030 UA roadmap target for installing productive green space in all child-friendly integrated green public space. Limitations of the models were acknowledged, and suggestions for model development were discussed.
Conflict management of smallholders palm oil plantation: Sustainable business perspective
Authors: Rokhim Rofikoh , Januari Arty D , Shara Siti 
Published: April 2021

Abstract
The palm oil sector development can be a driven factor for conflict in some areas. Smallholders are significant stakeholders that affect the palm oil sector’s condition and development, including conflict conditions and management. Therefore, conflict management of smallholders palm oil is considered necessary to sustainable business. This paper has investigated the conflict management concept of smallholder palm oil plantation using a sustainable business perspective. Most of the conflict between the company and smallholders happens due to obscure land ownership and negative externalities. However, to prevent the conflict’s border impact, the company should have an appropriate method to manage their conflict. Even though the local community does not use violence during the conflict against the company, conflicts may still negatively affect the trust and legitimacy of local communities toward companies. Therefore, we argue that socialization and mediation approaches are successful methods for conflict management. We also argue that integrating social and environmental issues into the core strategies of the company’s decision-making process is necessary because conflict is one of the factors used to make sound business and investment decision-making. This study found that conflict management can likely encourage business investment in the company and reduce the company’s operational risks and costs.
Implementation of smart city concept: A case of Jakarta Smart City, Indonesia
Authors: Syalianda Salsabila I , Kusumastuti Ratih D 
Published: April 2021

Abstract
The concept of a smart city has been proposed to solve urban problems. The concept has been implemented in different parts of the world, including in Jakarta, Indonesia’s capital city. Jakarta has experienced environmental and socio-economic problems as the consequences of rapid urbanization. Therefore, the local government has initiated Jakarta Smart City since 2014. This paper aims to explain the implementation of the smart city concept in Jakarta based on the six elements of the Smart European Cities, namely, Smart Economy, Smart Governance, Smart People, Smart Mobility, Smart Environment, and Smart Living. The research data is gathered through in-depth interviews with a representative from the government of Jakarta and from the literature review. The results indicate that Jakarta’s government has implemented the six elements of a smart city by using digital infrastructure, i.e., online platform and software application. However, there is still a lot of work to be done as there is still room for improvement to maximize the benefit for the city and its residents. One of them is that Jakarta’s government needs to optimize the use of the existing applications and increase the awareness of users of these applications.
Availability and needs of urban forest vegetation in industrial areas: Analyzing Landsat 8 Imagery using the normalized difference vegetation index method
Authors: Yasinta Tiara , Karuniasa Mahawan , Sodri Ahyahudin 
Published: April 2021

Abstract
An increase in the area of built-up space can lead to a decrease in the green open space of urban forest in industrial areas so that the minimum standard for urban forest area is not met. One of the environmental management that can provide thermal comfort in industrial areas is urban forests. This article aims to analyze and evaluate the availability and needs of urban forest vegetation to provide thermal comfort in industrial estates by utilizing Landsat 8 satellite imagery. The methods used in this article are qualitative and quantitative analysis. The qualitative methods were using secondary data in the form of literature studies. Meanwhile, the quantitative methods were following to obtain information on the availability and needs of urban forest vegetation using the Normalized Difference Vegetation Index (NDVI) method on Landsat 8 images. The analysis of urban forest vegetation in industrial areas found that forest vegetation city in industrial area X has a fairly low area. The distribution is not evenly distributed and only at a few points. The current urban forest vegetation needs for each workforce in industrial areas X is 3.96 m2 / person.
The effect of diet supplement on Oreochromis niloticus (L.) morphometrics in environments contaminated with Cadmium
Authors: Hayati A , Pramudya M , Supriyanto A , Nurhariyati T , Zahra P F , Hayaza S 
Published: April 2021

Abstract
The use of probiotic supplements from a consortium of microorganisms is a new alternative approach to improve and utilize the bioremediation of heavy metals. Some of the mechanisms of protection against heavy metal resistance by microorganisms include extracellular barriers, active transport of metal ions (efflux), and reduction of heavy metal ions. A study of the benefits of dietary supplements on morphometry of tilapia exposed to heavy metal cadmium has been carried out. This study wants to analyze the potential of vitamin C, probiotic (lactic acid bacterial consortium, LAB), and the combination of both to changes in the morphometric character of fish due to exposure to heavy metals cadmium. Thirty-six samples were examined for morphometric characteristics based on variations in treatment, namely variations in Cd concentrations (0, 0.3, and 0.6 ppm) and variations in the supplementary feed. The results of the study showed that there were many changes in fish morphometry. Significant cadmium exposure reduced bodyweight and morphometric size (total length, standard length, operculum length, chest fins to dorsal fins, and fishtail height). The administration of dietary supplements increased the growth of the fish body weight and other morphometry exposed to cadmium. Probiotic supplementation from the LAB consortium showed the best performance in increasing the fish morphometry, followed by vitamin C supplementation and a combination of both. This study gave valuable information for broodstock farmers or hatcheries that use water sources from rivers or reservoirs that are contaminated with heavy metals.
Seagrass spatial distribution based on density in the waters of Tunda Island, Banten
Authors: Sugianti Y , Rusli M , Mujiyanto  , Indrayanto F R , Khalifa M A 
Published: April 2021

Abstract
One of the coastal ecosystems on Tunda island is the seagrass ecosystem, which functions as a primary producer, breakwater, spawning ground, nursery ground, and feeding ground for fish. Mining of sea sand around this island can potentially result in environmental degradation. The purpose of this study was to determine the type, density and percentage of seagrass cover as well as the influence of environmental factors on seagrass species and their spatial distribution. The research was conducted in July 2019 at 14 stations around the island. The results showed that the species composition of seagrass from the stations on Tunda Island consisted of 6 species with a similarity index of more than 75% except at stations 6, 7, 10 and 13. Correspondence analysis shows that the spatial distribution of stations is different and is influenced by habitat characteristics. Thalassia hemprichii dominates the entire station, followed by Enhalus acoroides 6 stations, Halophila ovalis 4 stations, while Cymodocea rotundata is only found at 2 stations, and Cymodocea serrulata at 1 station. The distribution and species composition also shows that the seagrass beds in Tunda Island are in a healthy category.
Banana stem addition during transportation reduces the mortality of African catfish Clarias gariepinus
Authors: Nasrullah H , Yanti D H , Faridah N , Hardhianto D , Nababan Y I , Alimuddin A 
Published: April 2021

Abstract
In order to lower the fish mortality during transportation, the chopped banana stem (BS) was added during the African catfish transport procedure. The fish were packed in plastic bags with a density of 100 fish in 1.5 L water. The chopped BS was added into the plastic bags with different concentrations: 0 (control), 5, 10, and 15 mg L−1. The fish were transported for 5 hours. After transportation, the fish, together with the added chopped BS, were distributed into glass tanks and acclimated for 24 h. After 24 h, the results showed that the BS treatments had lower cumulative mortality compared to the control with the lowest mortality was observed at the 15 mg L−1 concentration (p<0.05). The BS treatments also increased the antioxidant defence and the immune status of the fish thus might be responsible for the reduced mortality.
Fishing ground mapping of static fishing gear in Lada Bay waters
Authors: Irnawati R , Yulianto S , Perdana V , Rahmawati A , Mustahal  , Surilayani D , Aditia R P 
Published: April 2021

Abstract
Various types of fishing gear operated in Lada Bay waters. Data and information regarding fixed or static fishing gear (SFG) are minimal. This research aims to (1) determine the number and size of SFG; and (2) mapping the fishing ground of SFG in Lada Bay. The census method was conducted from August 2018 to April 2019. The identification of SFG and water characteristics were analyzed descriptively. Map of the fishing ground made with GIS. The number of SFG in Lada Bay was 123 units (45 units of fixed lift net and 78 units of the arrier). The fixed lift net sizes range from 10.6-12.7 m with bamboo and areca trees construction. The leader net of the barrier is 100 m, wings 37.5 m, body 10.5 m, and crib 4x4-4x5 m, with bamboo and nets construction. The fishing ground of the fixed lift net is from Tanjung Lesung to the north of Liwungan Island. While the barrier is from Tanjung Lesung to Ciseukeut River. Water characteristics for fixed lift net are temperature 27.2-29°C, pH 7.7-9, salinity 30-33 ppt, depth 11-16 m, and brightness 2.8-3.8 m. The water condition for barriers is temperature 27.3-30°C, salinity 30-34 ppt, current 0.1-0.3 m/s, and depth 1.3-7.7 m with the substrate of muddy sand and sandy coral.
Analysis of nitrogen and phosphate in hybrid grouper media for better understanding of water management practices
Authors: Nasukha A , Septory R , Muzaki A 
Published: April 2021

Abstract
Indonesia is globally known as the third biggest grouper producer, but its production lately raises some environmental concerns. Aims of this study were identification of nitrogen and phosphorus concentrations derived from feed and metabolism of hybrid grouper. Simple vessels were built and arranged into five main components in culture system: culturing tank, sedimentation, oxygenation, reservoir and filtration. Two sets of systems were used as study replications. Twenty juveniles of the hybrid were stocked in 100 L culture tanks and fed to satiation. Four testing times were taken: at initial (0), 1, 3 and 6 hours after feeding. Results showed that nitrogen contents (ammonia, nitrite, nitrate and total nitrogen was performing nitrogen cycle starting from 0 and peaked at 3 to 6 hour after feeding time. The highest values were majority found in culture tank at 0.08; 0.0015; and 1.372 ppm for ammonia, nitrite and nitrate, respectively. The highest values of total nitrogen and total phosphates were 1.9 and 0.33 ppm that slightly fluctuated over the period even though still in fair values. This study also documented that feeding intake was relatively high (14.78% of feed/BW) that may indicate greater degree in generating solid waste materials to water media.
Developing coral trout, Plectropomus leopardus larviculture technology: application of floating skimmer
Authors: Asih Y N , Kusumawati D , Nasukha A , Sudewi  , Astuti N W W , Melianawati R , Giri I N A 
Published: April 2021

Abstract
Coral trout Plectopomus leopardus seed production has not been established well compared to other popular groupers such as tiger and hybrid grouper. Thus, the research has been focusing on the protocol construction of larviculture to improve survival and productivity. This study aimed to evaluate the application of floating skimmer to encourage swim bladder inflation in order to increase survival. Coral trout eggs were stocked in 5,000 L concrete tanks. Rotifer fed started on Day 2 (D2) afternoon and copepods nauplii on D4. Oil was dropped on the rearing water surface from D1 to D5 for without application of floating skimmer (control) and to D3 for with the application. A floating skimmer was installed on the surface of rearing water from D3 afternoons to D10. The survival rate was determined on D50. The results showed that application floating skimmer had a significantly higher survival rate (6.18±1.4 %) than without application (5.28±1.64%) (p<0.05). Observation under a microscope confirmed that swim bladder inflation first noticed on D4. The application of floating skimmer promoted a higher swim bladder inflation rate than without skimmer. From an economical aspect, application of skimmer in coral trout larviculture resulted in higher profit.
Morphological characteristics and chemical composition of Cuttlebone (Sepia sp.) at Muara Angke fishing port, Jakarta Indonesia
Authors: Henggu K U 
Published: April 2021

Abstract
Processing of cuttlefish in Indonesia for export or household needs only uses the body, including the meat to the head, on the other hand, the cuttlebone is categorized as a byproduct of processing waste. Therefore, estimates of cuttlebone resulting from this process are very abundant. This study aims to examine the physicochemical of cuttlebone (Sepia sp.) and their utilization. The results showed that morphologically, the cuttlebone was composed of 40% dorsal structure and 60% lamellar structure, and the dorsal structure consisted of phragmacone and proostracum. The cuttlebone is composed of a septum and pillars. Proximate content (dry basis) and heavy metal content of cuttlebone, namely 89,61% ash content, 0,35% lipid, 4,78% protein and 5,26% carbohydrates, heavy metal content of cadmium 0,6 mg/kg while lead and negative mercury. Macro mineral content (calcium, magnesium, potassium, phosphorus) is 40,18%, micro minerals (manganese, iron, zinc, sodium) 0,73%. The absorption of cuttlebone functional groups identified elements of CaCO3 aragonite, β chitin in lamellar and a chitin in the dorsal structure.
Sublethal toxicity of organophosphate pesticides on development organ and survival rate of silver rasbora (Rasbora argyrotaenia)
Authors: Kumala A S , Sulmartiwi L , Lutfiyah L 
Published: April 2021

Abstract
The use of pesticides in agriculture only functions as much as 90%. The rest has polluted the surrounding environment, especially fish. Organophosphates are active neurotoxins. The organophosphate does not require any other conversion to inhibit the acetylcholinesterase enzyme. Organophosphates have the ability inhibit the action of the acetylcholinesterase (AChE) enzyme which results in disruption of acetylcholine when it provides stimulation impulses from pre-synapse to post-synapse (neurotransmitter), this results in impaired muscle work. So that the work of the undirected muscles that can cause symptoms of poisoning that affect the work of the whole body. This study aims to know the effect of sublethal toxicity of organophosphate pesticides on development organ and the survival rate of silver rasbora larvae, and to determine the exposure of organophosphate pesticides that can affect development organ and the survival rate of larvae. The research method was an experiment with a Completely Randomized Design as an experimental design. The treatments used were different organophosphate concentrations, that is 0, 0.5, 1, 1.5, and 2 ppm. Each treatment was repeated four times. The main parameters observed were the development organ of larvae, egg yolk absorption rate, abnormality larvae. The results showed that organophosphate pesticide exposure of 0.5 - 2 ppm could affect the development of the organ, survival rate, and abnormality silver rasbora larvae. Exposure to organophosphate pesticides can also increase the absorption rate of egg yolks in larvae. Exposure dosage to organophosphate pesticides is directly proportional to the percentage of larva abnormalities and inversely proportional to the value of survival rate larva.
Morphometric and histological studies of the gonads of male and female hatchlings of olive ridley turtles (Lepidochelys olivacea)
Authors: Hidayatulloh D R , Dhamayanti Y , Purnama M T E 
Published: April 2021

Abstract
Sex determination in the neonatal phase is difficult because gonadal dimorphism is found in turtle hatchlings. This study aimed to confirm gonad dimorphism in olive ridley turtles (Lepidochelys olivacea) using morphometric and histological studies. Samples were collected from Boom Beach, Banyuwangi in turtle nests based on the number of nests, densities and habits. The dead turtle hatchlings were collected and dissected for gonad determination. We observed the morphometry of the gonad shape and size. We used H&E staining for both sexes to determine differences in the histological structure of the gonads. All data are expressed in means ± SD then analyzed using two-sample t-test (p<0.05) for significant statistical analysis. The gonads were found in the dorsal part of the body cavity, posterior to the lungs, the ventral base of the kidneys, and the walls of the peritoneum. Gonadal cortex thickness, lumen diameter of the paramesonephric duct and germinal epithelium were significantly greater in females than males. In conclusion, there were significant differences in gonads morphometry. We revealed that the structure of the gonadal cortex, the diameter of the lumen of the paramesonephric duct and the germinal epithelium can determine the sex of olive ridley turtle hatchlings.
Technological applications and adaptations in aquaculture for progress towards sustainable development and seafood security
Authors: Mustafa S , Estim A , Shapawi R , Shalehand M J , Sidik S R M 
Published: April 2021

Abstract
Fish demand has been steadily increasing globally. Due to stabilization of harvest from capture fisheries the aquaculture has grown rapidly at the rate of 7.5 – 9.2 annually. Currently, the contribution of this sector to the global seafood supply has exceeded the landings from the sea. A review of fish production and consumption scenario was carried out in a systems approach that envisaged case-based reasoning for the synthesis of new knowledge. This enabled the identification of ways and means of applying modern technologies to the existing aquaculture production methods. How the aquaculture systems can be transformed by such interventions to further enhance its contribution to food security which is at the heart of all the Sustainable Development Goals has been elaborated. Technology access and adoption, workforce transformation, and adjusting to the global value chains are the issues that have to be addressed. In this context, research and development institutions can help by leveraging their resources and expertise in motivating a review of the existing policies and knowledge transfer to the farming communities to shape the development of aquaculture along the sustainability pathways.
The evaluation of seed production of silver arowana fish Osteoglossum bicirrhosum (Cuvier, 1829) with different natural feeding
Authors: Santanumurti M B , Samara S H , Pratama E K W , Hudaidah S , Putri B 
Published: April 2021

AbstractSilver arowana fish,Osteoglossum bicirrhosum(Cuvier, 1829), is an ornamental fish originating from Brazil which has been popular among hobbyists. The increasing demand is not followed by an increase in fish production. To increase production, it is necessary to provide proper feed. The purpose of this study was to evaluate the production of arowana fish seeds by providing different natural feeds through growth and survival rate. This study was conducted using Completely Randomized Design (CRD). This study used 3 replications and 3 treatments (A:Tubifexsp., B:Chironomussp., and C: combination ofTubifexsp. andChironomussp.). The length and weight results showed that treatment A had length of 0.45 cm, weight of 0.33 grams, treatment B had length of 3.36 cm, weight of 2.30 grams and treatment C had 1.65 cm, a weight of 1.28 grams. The survival rate showed that treatment A 60%,treatment B 100% and treatment C 67%. Based on these results, the natural feed ofChironomussp. was very appropriate to increase the growth and survival rate of silver arowana fish seeds.
The effect of spirulina meals on Oithona sp. (Claus, 1866) production through growth analysis
Authors: Samara S H , Santanumurti M B , Widyantoro A G , Putri B , Hudaidah S 
Published: April 2021

Abstract

Oithona sp. is widely used for natural feed of larval stage. Therefore it is necessary to develop its culture method. The appropriate nutrient will affect the development of Oithona sp production. One of the highly nutritious ingredients is Spirulina meals. This study was conducted to determine the effect of Spirulina meals application on the population density of Oithona sp. The treatments in this study were A (Oithona sp. fed with Chaetoceros sp. of 2x106 cell/ml), B (Oithona sp. fed with 83 mg/L of Spirulina meals), C (Oithona sp. fed with 167 mg/L of Spirulina meals), D (Oithona sp. fed with 249 mg/L of Spirulina meals). The results showed that Spirulina meals had an effect on the population density of Oithona spp. This study also showed that the use of 83 mg/L of Spirulina meals could produce the best results with the amount up to 1067 ind/ml and grow speed of 0,78 ± 0,08 ind/day
Differences size of Channa striata broodstock and the number of eggs produced in natural spawning
Authors: Maulana M H , Wicaksono R D , Suciyono  
Published: April 2021

Abstract
Snakehead fish (Channa striata) is a type of freshwater fish that has the potential to be developed because of its high economic value. Information about the reproductive biology of Channa striata is still limited, so it is necessary to carry out reproductive studies for its future development. Research on the aspects of reproductive biology such as the comparison of the weight of the broodstock (female) to the number of fecundities was carried out descriptively in December - January 2020. This study used three categories of broodstock parent size with different weights, namely (P1): 155-350 grams, (P2): 400-700 grams, (P3):> 700-1200 grams. The results showed that the number of eggs produced sequentially, namely (P1): 75,62.57 ± 1,106 eggs, (P2): 9,821.17 ± 628 eggs, (P3): 11,103.80 ± 2,307 eggs. This study concludes that the number of eggs produced increases with the larger size of the broodstock used. However, it was found that a consistent number of eggs were found at the parent size between 400 - 700 grams.