bluuebunny/crossref_metadata_2025_split huggingface dataset:
Development of Autopilot Unmanned Smartboat Vehicle (AUSV) Based on Fishing Zone Prediction Map
Authors: Rahmat M B , Arfianto A Z , Santoso T B , Santoso T , Gunantara N 
Published: August 2020

Abstract
The potential of marine fish is one of the hopes for fishermen. Fishing boats have not been equipped with fish detection devices such as fish finders. To get to the location of fishing, fishermen do not know accurately the distance and direction of the ship. A fisherman only relies on experience and information from other fishermen to find out the location of the fish distribution. The ship’s fuel losses are caused by fishermen having to go around to map fishing points. Accurate data for autopilot technology is needed to move the fishing boat to the point of distribution of fish, serves to help fishermen to increase fishing yields and reduce ship fuel losses. The 70 ×16 ×15 cm3 ship prototype with autopilot technology measures the distance between fishing boats and the target location of the nearest fish distribution. This prototype is equipped with a GPS and a compass sensor that shows the direction and difference of angles to the direction of the target. This prototype has a rudder that is driven by a servo motor based on the angle difference to the setpoint. Based on the results of research and testing, this prototype can run an average distance of 15.5 m. The results of angle accuracy testing, the prototype has an angle difference. The compass angle and bearing angle are an average difference of 35.33°.
Making the post-2020 global biodiversity framework a successful tool for building biodiverse, inclusive, resilient and safe food systems for all
Authors: Gassner Anja , Dobie Philip , Harrison Rhett , Vidal Adriana , Somarriba Eduardo , Pythoud Francois , Kumar Chetan , Laumonier Yves , Chhatre Ashwini 
Published: August 2020

Abstract
COVID-19 has exposed the vulnerability of our economies to shocks, and it has laid bare deep inequalities in our society that threaten to derail the Sustainable Development Goals. Governments around the world are looking for recovery options that deliver new jobs and businesses. Few sectors link job creation so closely to sustainable green production as the food sector. It is the largest source of employment in many countries in the global South. At the same time cities depend upon imported food that is produced in far-away countries and shipped around the world. The trillions of dollars to be invested in recovery from COVID-19 offers an unprecedented opportunity for a clean, green and just transition to a more biodiversity-friendly agricultural and food system. Key among the political opportunities to shift the post-pandemic world towards sustainability and resilience are the ongoing deliberations of the Post-2020 Global Biodiversity Framework. The Post-2020 Framework will be the precedent for national governments to bridge economic action with the key need for a green, resilient recovery. The United Nations Convention on Biological Diversity (CBD) has traditionally seen agriculture as one of the biggest threats to biodiversity and has been actively promoting the protection of natural ecosystems by concentrating its efforts on preventing further expansion of agriculture. But it has not explicitly recognized the importance of mixed, diverse agricultural landscapes for their contribution to the conservation of wild biodiversity. The CBD has an opportunity to bring its influence to bear on international policy favouring investments in local production and marketing capacity to replace imported food and beverages. This will contribute to both COVID-19 recovery through creation of rural jobs and income and empowering governments and consumers to support diverse, mixed agricultural systems that conserve and enhance biodiversity as well as reduce greenhouse gas emissions.
Limnology in the tropics: Next steps?
Authors: Santoso A B , Toruan R L 
Published: August 2020

Abstract
Limnology in the tropics provides a new paradigm for inland water science, which has traditionally focused on temperate regions. Numerous studies have shown that tropical inland waters are fundamentally different from temperate systems. Warm conditions, combined with higher solar radiation and higher precipitation rates, have important consequences for biogeochemical processes in tropical waters. In addition, rapid population and economic growth has resulted in high levels of anthropogenic pressures on these systems. Such pressures have resulted in a reduction in the adequate supply of water of acceptable quality in many tropical countries and provide challenges to limnologists in terms of societal concerns and climate change impacts. Using a bibliometric approach to assessing limnological studies in the tropics, we examined how tropical limnology has barely touched the fundamental complexity that tropical inland waters have. Over 12,000 references were found and indexed by Scopus as being within the category of “limnology”. Only 335 of these were grouped under tropical studies. However, similar to those studied globally, studies from the tropics focused mainly on “lake”, “river”, “phytoplankton”, “carbon”, “oxygen”, “fish” and “nutrient”. While areas of research tended to reflect how limnologists perceive the impacts of climate change and eutrophication on lentic and lotic systems, the ecosystem services provided by inland waters and their resilience to disturbance were found to require further study.
Phytoplankton composition and abundance in the floating treatment wetlands (FTWs) system of Lake Maninjau, Indonesia
Authors: Sulastri  , Henny C , Susanti E 
Published: August 2020

Abstract
Algae blooms have been recorded several times in Lake Maninjau and recently in April 2018. Floating treatment wetlands (FTWs) system was installed in June 2018 in Lake Maninjau as one of the methods to reduce the risk of eutrophication in this lake. The study is to reveal the characteristics of phytoplankton composition and abundance including environmental conditions in the FTWs system in Lake Maninjau. TP concentrations tend to decrease due to nutrient dynamics such as the dilution effect of precipitation which shifting the dominant of phytoplankton composition during observation. There were two different groups separating phytoplankton composition between the inside and outside of the FTWs system. The dominant species of Aphanizomenongracile and Synedra ulnawere related to high conductivity and the TP concentration while Oscillatoriaformosa was related to the high temperature. Phytoplankton abundanceon the inside of FTWsdecreased over time compared to the outside of FTWs, while chlorophyll-a fluctuated with the average value of 6.79 µg.L−1 on the inside of FTWs and 9.54 µg.L−1 on the outside of FTWs. This study suggests that the FTWs could potentially reduce the chlorophyll-a thereby minimizing the risk of eutrophication in a tropical lake.
Aquatic plants as phytoremediator for common carp fish (Cyprinus carpio) culture
Authors: Taufik I , Setijaningsih L , Mulyasari  
Published: August 2020

Abstract
This research was conducted to optimize the performance of aquatic plants in maintaining water quality in common carp breeding. This study consisted of three treatments, namely: A. Lemna minor, B. Azolla pinnata, and C. Control (without plant) with three replications. The size of common carp juvenile used was ± 3 cm with a density of 150 individuals/m2. Feed was given ad satiation. The parameters observed were survival rate, weight, daily growth rate, water quality such as Biochemical Oxygen Demand (BOD), nitrogen and phosphate reduction. The research design used was Completely Randomized Design (CRD) with Analysis of Variance (ANOVA). Whereas the effectiveness of aquatic plants and water quality analyzed descriptively. The results showed that the highest survival rate and productivity of common carp breeding ponds were in treatment B, namely 86% and 463.80g. The growth rates between the three treatments were not significantly different (p> 0.05), each of which was 0.08; 0.08 and 0.09 g day−1. The BOD reduction results in treatments A, B, and C, respectively 54.65, 54.65 and 52.33%. Nitrogen reduction in each treatment was (A) 67.54%; (B) 87.37%: (C) 25.27%. Furthermore, treatment A and B did not differ in the reduction of elemental P, respectively 52.68 and 55.20%, but in C the reduction was still low at 36.75%. Optimum water quality for dissolved oxygen in treatment A, B, and C respectively 7.24; 7.57 and 3.14 mg L−1. The temperature range between treatments was 24.5 - 27.2 with a pH value of 6.00 - 6.87.
The effectiveness of integrated floating treatment wetlands (FTWs) and lake fountain aeration systems (LFAS) in improving the landscape ecology and water quality of a eutrophic lake in Indonesia
Authors: Henny C , Jasalesmana T , Kurniawan R , Melati I , Suryono T , Susanti E , Yoga G P , Rosidah  , Sudiono BT 
Published: August 2020

Abstract
Concerns over the impacts of floating cage aquaculture (FCA) systems on ecosystem health have led to the exploration of alternative green technologies as a way of improving water quality and preventing eutrophication problems in Lake Maninjau, Indonesia. This lake has been suffering from frequent harmful algal blooms (HABs) and hypoxic conditions due to excess nutrient and organic inputs from FCA. These have caused mass fish kills and decreased the local fish population. The main goal of this study was to assess the effectiveness of using integrated floating treatment wetlands (FTWs) and a lake fountain aeration system (LFAS) to improve lake water quality and enhance ecological conservation. The FTWs, which resembled artificial islands (AFIs) and covered an area of 23.75 m2, were planted with Echinodorus palaefolius. An LFAS was installed at the front of the FTWs. The impacts of the FTWs were evaluated from July to December 2018, while those of the LFAS was evaluated from October to November 2018. Lower nutrient and chlorophyll-a concentrations were observed within and around the FTWs and LFAS. Also, the LFAS increased the dissolved oxygen concentrations in the water to more than 100% at night. The results suggested that FTWs and LFAS could be used to prevent eutrophication and lake hypoxia. The plants in the FTWs grew much faster in the parts that were facing the waves, with their higher plant biomass suggesting that more nutrients had been removed from the lake. Also, the FTWs and LFAS, which resembled floating gardens, help to make the lake landscape more attractive and increase its amenity value. The improved water quality and habitat provision provided by these systems has attracted more local fish and other wildlife to the FTWs. The overall improvement in lake water quality and ecosystem health has the potential to ensure better provision of essential lake ecosystem services.
Evaluation of catfish performance in juvenile rearing using environmental probiotic
Authors: Yosmaniar  , Mulyasari  
Published: August 2020

Abstract
This research was conducted to determine the performance of catfish given environmental probiotics during breeding. Catfish used in the study had a length of 1 - 1.5 cm and a weight of 0.065 ± 0.1 grams with a stocking density of 1000 individuals per pond. The study carried out in a stagnant pond. The treatments given were: 1) using probiotic and 2) without probiotic as acontrol. The study was conducted for 60 days. Parameters measured were growth, survival and water quality. Data analysis was carried out descriptively. The results showed that catfish given probiotics had a more uniform size with an average size of 9.54 cm and 5.89 grams. Whereas catfish without being given probiotic vary in size with an average length of about 6.73 cm and weight around 2.35 grams. The weight growth of fish given probiotic was 5.83 grams with the survival rate of 85%. While fish without probiotic have a weight growth of 2.29 grams with a survival rate of 60%. Levels of ammonia in water media with Rifa probiotic better than without Rifa probiotic. Based on these results, it can be concluded that the use of the environmental probiotic showed a better performance on catfish growth than the control (without probiotic).
Experimental aquatic food chain system: Enhancing Daphnia magna as natural feed using eutrophic waters
Authors: Tanjung L R , Chrismadha T , Mardiati Y , Sutrisno  , Mulyana E , Nafisyah E , Muit N 
Published: August 2020

Abstract
An experimental aquatic food chain system was tested to utilize eutrophic water for producing useful natural feed. Water flea (Daphnia magna) was the main focus in this food chain system, in which it was grown on algal biomass bloom in eutrophic water, and harvested following its function as fish feed. The eutrophic waters were originated from a small lake Situ Rawa Kalong and catfish ponds located in Bogor. Daphnia was grown in an aquarium filled with the eutrophic waters from the two localities and reared without artificial feed, with an initial density of 5 individuals/L. The experiment was conducted with three replications for 19 days. Sampling was carried out five times to observe the Daphnia development. The original chlorophyll content in the aquarium of catfish pond and Rawa Kalong water were 257.64 and 211.91 mg/m3, respectively. It was observed that Daphnia consumed algal biomass to support their growth, indicated by the increase of the chlorophyll content in the water was followed by the rise of the Daphnia density to reach a maximum of 245 individuals/L at day 15 for the catfish aquarium, and then overgrazing occurred which resulted in a decrease in the chlorophyll content which was observed from day 12. The density of Daphnia in Rawa Kalong water at day 19 was 152 individuals/L and kept increasing. In the experimentation of Daphnia as natural feed, Daphnia was grown in four concrete ponds and fed with fish pellets. The Daphnia biomass was harvested when it reached a productivity of 1.67 g/m2/day. The feed conversion ratio (FCR) of fish pellets into Daphnia biomass increased with the age of the culture, with the highest value of 0.46 at day 36. Five Bada fish (Rasbora maninjau) per aquarium were then grown for 60 days, fed daily with progressive amount of Daphnia from 1.5 to 4.0 g, and the growth was compared with the control which was fed with an increasing amount of fish pellet. Fish length and weight were observed every 20 days to calculate the growth rate, weight gain, and feed conversion ratio. The results showed that the growth rate of the fish ranged from 0.24–0.98% per day. Fish pellets stimulated a higher growth in the initial phase of growth, but decreased rapidly with the fish age, while Daphnia provided a more stable growth rate. Based on its lower FCR value, Daphnia is more efficient as fish feed. Thus, Daphnia proved to be a suitable natural food source for Rasbora cultivation. Overall, our results indicated that the experimental aquatic food chain system composing of Daphnia as the first level consumer grazing on algal biomass, followed by Rasbora as second-level consumer devouring of Daphnia not only is an efficient and flexible system for reducing the nutrient level in eutrophic waters but also can support a stable growth of cultured fish.
The significance of the ecosystem value and its effect on the fish distribution in Sibau sub-watershed
Authors: Putra RAE , Aripin  , Andono A , Mahmud A 
Published: August 2020

Abstract
Betung Kerihun National Park (TNBK) is the largest conservation area in West Kalimantan which has an area of 816,693.40 ha with high species diversity, both flora and fauna. One of the constituent ecosystems in TNBK region is its watershed. TNBK region has four sub-watershed which acts as a receiving area and divert rain water from tributaries to the main river (Kapuas River), namely Embaloh, Sibau, Mendalam and Kapuas sub-watersheds. The objective of this study is to evaluate the sub-watershed ecosystem value which affect to distribution of the fish. The Sibau sub-watershed, one of the four sub-watersheds in TNBK plays as supporting ecosystems which have a high influence on the distribution of fish species. This zone also has a function as a site for the local people activity and become as a buffer area. Fish monitoring data in 2018 conducted on three rivers i.e. Peang River, Menyakan River and Sibau River which locateson the traditional zones show a high status indiversity. There are 25 species of fish which successfully recorded in the fish distribution monitoring with a total of 242 individuals. The common species were Batu fish (Labocheilos falcifer), Seluang fish (Rasbora voltzii), and Kenyuar fish (Luciosioma setigerum). The biophysical conditions of the river in the Sibau sub-watershed seem suitable for the habitat of many fish species. The determinant factors were water temperature, turbidity, river canopy and pH. The obtained fish can also be categorized as a bioindicators of a waters by considering of those aspects. Most of the fish species are directly or indirectly dependent on the forest or river in providing food such as plant materials (leaves, flowers, fruits) or invertebrates. Sibau sub-watershed has a rich of vegetation, as well the type of alluvial soils that make up the land. The alluvial soils have better fertility rates than other types of soils. In addition, high rainfall (2,863 - 5,517 mm/year) and dense river canopy also have an important influence on fish life in the Sibau sub-watershedwaters.
The hydromorphological characteristics of the Bonan Dolok Watershed as a basis for ikan batak (Tor spp. and Neolissochilus spp.) conservation
Authors: Ridwansyah I , Larashati S 
Published: August 2020

Abstract
Lake Toba Caldera is one of the most extraordinary volcanic features formed during the Quaternary geological time. Currently, Lake Toba is a multi-functional lake, which is not only used as a source of water for the Sigura-gura power plant but also a tourist destination with a high level of visits. Lake Toba catchment area is part of the landscape of the Bukit Barisan Mountain Range extending northwest–southeast with irregular ridges and valleys, which have peaks with altitudes between 2000–3000 m above sea level, dominated by slope class (3–8%). Lake Toba is also a place for Indonesian native fishes having high values such as ikan batak (Tor spp. and Neolissochilus spp.). At present, however, the fishes are difficult to find. Generally, ikan batak prefers to live in a habitat with rocky bottoms, sand substrates, clear water, slow to heavy water flow, and the river environment is mostly in the form of primary forest. Description of physical characteristics of water bodies is needed to maintain an ecological system and to be used as a basis for determining fisheries protection zones. Bonan Dolok River is one of the rivers in Samosir Regency-North Sumatra where ikan batak can be relatively found. The river flows throughout the year and its morphology, which consists of a pool, riffle, and run and flow patterns such as laminar and turbulent are favored by ikan batak. Furthermore, the upstream area which is still covered by natural forest makes this area suitable as a conservation area for ikan batak itself.
Fish distribution in Ranggeh and Batang Air Stream, Tanjung Raya, Agam District, West Sumatra Province
Authors: Dina R , Haryani G S , Nasution S H , Samir O , Lukman  
Published: August 2020

Abstract
Ranggeh and Batang Air Stream are two inlets of the entire channels of Lake Maninjau which are located on the southeast side of the lake with some different. Therefore, this study aims to assess fish distribution along Ranggeh and Batang Air Stream. Sampling was carried out in February, March, April and June 2019 at five stations in the Ranggeh Stream and three stations in the Batang Air Stream representing the upper section, middle section and lower section. The fish samples were caught using a scoop net and trap. Also, several parameters of water quality such as temperature, pH, dissolved oxygen, turbidity, conductivity, current, and discharge were measured in situ. Fish were morphologically identified and measured followed by statistical analysis. A total of 11 fish species were found in Ranggeh Stream, namely Aplocheilus panchax, flower horn, Gobiopterus brachypterus, Homaloptera gymnogaster, Nemacheilus chrysolaimos, Oreochromis niloticus, Osteochilus vittatus, Poecilia reticulata, Puntius binotatus, Rasbora maninjau, and Tor sp. Furthermore, five fish species were found in Batang Air Stream namely Homaloptera gymnogaster, Nemacheilus chrysolaimos, Oreochromis niloticus, Poecilia reticulata, and Rasbora maninjau. The highest number of fish species was found in the lower section of Ranggeh Stream. Homaloptera gymnogaster is a species with a minimal habitat where only found in the upper part of both streams. Water temperature and dissolved oxygen were significantly different between the upper and lower part of Ranggeh Stream. It is recommended to conserve mainly the Ranggeh Stream due to its higher fish richness through restoration act along the stream and protect the upper section as habitat for protected fish species namely Homaloptera gymnogaster.
Fundamental Frequency Anomaly Around Cimeta River, Padalarang, West Java
Authors: Fattah Erlangga Ibrahim , Januarta Gabrio Hikma , Tohari Adrin , Yudistira Tedi , Gultaf Hikhmadhan , Ipmawan Vico Lutfi 
Published: August 2020

Abstract
Lembang Fault segment Cimeta and Cimandiri Fault segment Padalarang assumed to coincide at Padalarang, which lies at Ngamparah and Bojongkoneng district, Bandung, West Java. Padalarang is an area with high traffic and infrastructure conditions, such as freeway overpass named Cimeta bridge, rail bridge and soon-to-be tunnel of fast train Jakarta – Bandung. The presence of these faults becomes a threat to both residents and the infrastructures. We performed an investigation of seismic microzonation using a Horizontal Vertical Spectral Ratio in the area. Microtremor measurement has been done in 37 points widespread from the Cimandiri Fault segment Padalarang to Lembang Fault segment Cimeta. The method could provide information about the fundamental frequency and amplification factor of earthquake propagation to the site from the analysis of spectral ratio microtremor data. Fundamental frequency associated with the thickness of sedimentation meanwhile amplification factor indicates the impedance contrast at the site. The result shows that the fundamental frequency of Ngamprah and Bojongkoneng area around 1-6 Hz indicated deep sedimentation. However, we found an anomaly of the high fundamental frequency of 9 Hz at the Cimeta river. Therefore, we attempted to conduct another measurement around the area at different times and conditions. Three measurements of microtremor around the Cimeta river have shown that the area has high fundamental frequencies around 9-11 Hz. These results may indicate the presence of both bedrock and geological structure of Lembang Fault at the Cimeta river.
Tsunami Preparedness Analysis for the Community of Legundi Island - Lampung
Authors: Achiari H , Gelfi M 
Published: August 2020

Abstract
The eruption of Mount Anak Krakatau caused massive amounts of material avalanches, which caused a tsunami in late 2018. Based on the author’s observational notes, in small Island Legundi that located in Sunda Strait waters, there were many houses, public infrastructure, and government offices that were severely damaged. In this paper, the tsunami preparedness survey was carried out through a questionnaire survey and a personal interview with victims of the 2018 Sunda Strait Tsunami. The questionnaire obtained a variety of necessary information to find out the preparedness of the Legundi Island community to face tsunami, including the demographics of victims, tsunami awareness, and evacuation behaviour. This research concludes that the coastal-community that affected tsunami in Legundi was not prepared well, both disaster and evacuation knowledge.