bluuebunny/crossref_metadata_2025_split huggingface dataset:
Effectiveness phytochemistry test of aquatic plant Murdannia sp. in invitro for fish pathogen disease
Authors: Nugraha M F I , Novita H , Maharani F H , Elya B , Rajamuddin M A L , Akhdiya A , Yunita R , Enggarini W , Reflinur  
Published: August 2020

Abstract
Fish disease is a major factor causing yield losses in fish farming production. The use of antibiotics that treat against diseases can pose the highest risk for the ecosystem and its overuse could cause the side effect, such as antibiotics-resistant diseases. Environmentally friendly production method of fish is thus needed. The objective of this study was to determine the active pharmacological substances and anti-bacterial activities extracted from Murdannia sp. as a potential herbal agent as an anti-bacterial treat fish diseases. The study was conducted from October 2017 to May 2018. Murdannia sp. aquatic plants were collected from the Bantimurung river waters Maros district, South Sulawesi. Phytochemical analysis was carried out at Laboratory of Pharmacology, University of Indonesia. Anti-bacterial analysis was carried out using the disc diffusion method in the KKP Fisheries Development Research and Management (IP4I), Depok. The results showed that an application of Murdannia sp. crude extract treated at dose of 0.1 g did not inhibit the growth of the bacterial pathogen of Aeromonas hydrophilla, Edwardsiella ictaluri, Streptococcus agalactiae, Flavobacterium columnare. However, at 0.2 g of Murdannia sp. extract level, the growth of Edwardsiella ictaluri was inhibited in intermediate inhibiton category which inhibition zone of 11 mm. Based on the ppharmacological test, it was known that Murdannia sp. aquatic plants consisted of three majority compound such as 0.084/10 g of flavonoid, 0.0558/10 g of Phenol, and 2/10 g of antioxidant 3036. These findings could be a basic research information in attempting to use aquatic plants as an alternative way for treating anti-bacterial fish disease in future.
Management of Mystacoleucus padangensis population by the determination of the optimum length at first capture for its exploitation in Lake Singkarak, West Sumatra-Indonesia
Authors: Warsa A , Krismono  
Published: August 2020

Abstract
The Lake Singkarak locates on Solok and Tanah Datar Regency, West of Sumatra-Indonesia which has 10,908.2 ha surface area and 178 m average of depth. The fish biodiversity in this lake was high, among of them was the native fish species of bilih (Mystacoleucus padangensis) which pose an important economic value. The population of bilih has been decreasing caused by the overexploitation and habitat degradation. The resource management effort on the bilih fish was conducted through a determination on the needed conservation area as well as regulation on the location for capturing and restocking of the fish. The objective was to the determine the optimum length of the fish at the first capture (Lc_opt) as a function of F/M for conducting a sustainable exploitation. The primary and secondary data were used in this study. The fish samples were caught on four stations using several experimental fishing gears in July 2019. The biological obtained data (population parameters, growth pattern, and reproduction) were collected from the secondary data. The length at first mature of male and female of bilih were 7.5 cm and 8.2 cm, respectively. The value of Lc_opt for F=3.86 M was 11.2 cm, while it would be of 10.0 cm for F=M and 9.5 cm for F=0.5M. Those values were larger than the first size of the mature gonads which suggested that bilih enable to reproduce. The exploitation conducted on the value of Lc_opt would give the maximum yield per recruitment and maintain population size above half of the natural abundance.
Survival of Bada (Rasbora sp.) and Daphnia sp. using biofloc from Lake Maninjau as natural feed
Authors: Sadi N H , Maghfiroh M , Sutrisno  , Yoga G P , Chrismadha T , Widiyanto T 
Published: August 2020

AbstractBiofloc is one of the water bioremediation agents in aquaculture. A consortium of microorganisms in biofloc, which include heterotrophic bacteria, phytoplankton and zooplankton, can also function as natural food sources for aquatic biota. This study aims to investigate the potential of biofloc microorganisms consortium as natural food for commercial fish feed-less aquaculture. The study was conducted using Lake Maninjau water taken from two locations at Lake Maninjau, namely Nagari Sungai Batang and Nagari Maninjau, as test samples. Maninjau Lake was chosen because it had a high content of organic compounds and various microorganisms which could be used as an indigenous biofloc starter.Daphniasp. and Bada (Rasborasp.) were used as an experimental biota without periodical additional feed during the trial. The results showed that biofloc could grow well using Maninjau Lake water media. Bada and Daphnia could live in the biofloc system for 20 days without supplementary feeding and afterwards entering the death phase. The decline in the population of Bada and Daphnia was thought to be caused by the decrease of biofloc role as natural feed and its ability in maintaining the water quality.
Stock assessment and potency of sustainable yield of glass eel (Anguilla spp.) in Cimandiri River Estuary, West Java
Authors: Triyanto  , Afandi R , Kamal M M , Haryani G S 
Published: August 2020

Abstract
The demand for glass eel (Anguilla spp.) as a source of seeds for aquaculture activities depended on natural catches continue to increase. It has caused glass eel fishing activities to increase and potentially affect the biological condition and sustainability of fishing activities. The study aims to assess the potential stock, maximum sustainable yield (MSY) and the level of utilization of glass eel in the Cimandiri river estuary, West Java. The data were obtained from data on fisherman catches in the period 2014-2018. Potential stock calculation using the CPUE method is based on the Leslie model. Calculation of MSY based on the surplus production model from Schaefer. Utilization rates are determined based on the percentage of actual catch to the total allowable catch (TAC). The results of the study obtained an estimated glass eel potential stock of 4,575 kg. The maximum sustainable yield (MSY) was 991.20 kg.years−1 and the effort (fMSY) was 1050 trip.years−1. The average of glass eel production was 725.55 kg.years−1 and fishing effort 1031 trip.years−1. The TAC which set at 80% from the MSY was 792.96 kg.years−1. The average of the utilization rate of glass eel reached 91.50%. Utilization rates exceeding the TAC value occurred in 2014 and 2017. Management of glass eel fisheries is needed through limiting fishing efforts and the number of catches.
Conservation of Jatigede Reservoir catchment area based on sediment and water yield control
Authors: Fakhrudin M , Ridwansyah I , Daruati D , Wibowo H 
Published: August 2020

Abstract
Jatigede Reservoir serves to control floods in Indramayu area. The reservoir irrigate rice fields by 90,000 ha, supply raw water for clean water by approximately 3,500 l/sec, and produce electricity by 110 MW. Yet, the condition of the Cimanuk watershed is reported in a critical situation. It was characterized by high soil erosion and high fluctuations in river discharge. This study aims to evaluate the sedimentation and river flows that entering the Jatigede Reservoir. The rainfall-runoff simulation determined by SWAT (Soil and Water Assessment Tools) on Jatigede Reservoir is based on existing land use. According to SWAT, it showed the possibility of current land use on annual crop and garden land which is carried out some conservative measurements, such as terrace, grass strip, and ditch and also building area that constructed an infiltration well would reduce the sediment yield from around 9.05 to 5.96 million tons per year. Not only that, but also runoff will decline from 99.7 to 75.8 mm per year. If the measurements are based on land use according to the 2011-2030 Spatial Plans of Garut Regency and Sumedang Regency, the sediment yield can be reduced to 4.97 million tons per year and runoff which become 97.6 mm per year. However, if the environmental degradation of the Cimanuk watershed is allowed to continuously increase that is marked by changes in uncontrolled land use, it will raise the sediment yield and runoff by about twice as the current conditions, so that it can threaten the sustainability of the function of Jatigede Reservoir.
Fish community structure and distribution at Lake Siawan, West Kalimantan, Indonesia
Authors: Haryono  
Published: August 2020

Abstract
Freshwater fish in Kalimantan is the highest among Indonesian islands, with many endemic species. Therefore, a fish population study was conducted in Lake Siawan, West Kalimantan, for the purpose of determining fish diversity, abundance, local distribution, species status, and its habitat. Five sampling stations were designated and the catch per unit of efforts (CPUE) approach was adopted to get the samples. The fish caught were counted to get the species diversity and abundance. There were 57 species from 13 families that were recorded, with Cyprinidae as the dominant family with 34 species, followed by Bagridae with 4 species. Station 1 and station 5 were recorded as the highest and the lowest fish diversity, respectively. The most abundant species were Brevibora dorsiocellata and Rasbora tornieri. Four species has wide distribution and almost all of the fish found was native species. Three endemic species recorded were Hampala bimaculata, Leptobarbus hosii and Puntigrus anchisporus.
Structure of zooplankton community in Lake Maninjau. Case study in Nagari Sungai Batang - Agam, West Sumatra
Authors: Badjoeri M 
Published: August 2020

AbstractThe presence of zooplankton plays an important role in the lake ecosystem. This study aimed to investigate the community structure of zooplankton in Lake Maninjau, especially in the area of PN Nagari Sungai Batang. Lake Maninjau contributes greatly to the community and regional economy. This research was conducted in April, July, August, September, October, and November 2018 at 3 sampling stations in Lake Maninjau, Nagari Sungai Batang, West Sumatra. The zooplankton was collected using a vertical zooplankton net from bottom to surface. The samples were preserved in a 5% Lugol’s solution. The zooplankton was identified based on several references under a binocular microscope. The abundance of zooplankton was calculated using Sedgewick Rafter Cell. Some physicochemical parameters of water were also observed. The results of zooplankton analysis found 3 genera of Protozoa, 13 genera of Rotifers, 5 genera of Cladocera, and 1 genus of Copepods and Nauplius. The results showed the diversity of zooplankton in Lake Maninjau was categorized as moderate level, there were no dominant species, and the species was evenly distributed. Predation has occurred in the zooplankton community, which is generally based on body size or ability to move. Generally, the structure of the zooplankton community in Lake Maninjau is influenced by water quality factors in their habitat.
Population structure of bada (Rasbora maninjau Lumbantobing, Daniel N, 2014) caught using “lukah” in Batang Air Stream
Authors: Nasution S H , Dina R , Samir O , Haryani G S , Lukman  
Published: August 2020

Abstract
Inlets of Lake Maninjau are the fishing area of bada (Rasbora maninjau), one of them is Batang Air Stream. Bada fishing intensively, which is not balanced with conservation efforts, causes the fish population to gradually decrease and even become rare. Bada fishing activities at this location using “lukah” (trap) has been carried out and owned from generation to generation. This study aims to determine the population structure of bada using “lukah” in Batang Air Streams based on conservation efforts. Fish sampling was carried out in March, April, and June 2019. Fish samples obtained from three “lukah”. The size structure (length and weight), growth patterns (length-weight relationship), the gonadal maturity stage (GMS), and the sex ratio of bada were measured in this study. The results showed that the length and weight of bada in March, April, and June were found with a range of lengths of size 12-127; 63-125; and 73-113mm and weight were 1.8-14; 1.9-13.6; and 3.1-11g, respectively. The value of b ranged from 2.64 to 2.92. Isometric growth was found in March and April, which means the growth of length was balanced with the growth of the weight, and June is negative allometric. The highest frequency of GMS IV, which means the fish are ready to spawn, was found in March 2019. Therefore, during this survey period, it was might be a peak of the spawning period. High frequency (≥50%) of mature bada was found at length 71.5-99.5 mm for females and 65.5-77.5 for males. It is shown that most of the bada in “lukah” was mature. The sex ratio between male and female fish is 1:1.
Histological analysis of ovarium development of Hampala macrolepidota Kuhl & Van Haselt, 1823 from Jatigede Reservoir, West Java
Authors: Herawati T , Akhodiah S , Yustiati A , Iskandar  , Dhahiyat Y , Lili W 
Published: August 2020

Abstract
This research was conducted from May to September 2018 at the Biotechnology Laboratory, Faculty of Fisheries and Marine Sciences, University of Padjadjaran. Fish samples were taken from Jatigede Reservoir, Sumedang, West Java. The hampala fish consisted of female hampala barb with gonadal maturity level (GML) IV, GML V, and GML VI. Ovarian histological preparations were made at the Animal Microtechnical Laboratory, Faculty of Mathematics and Natural Sciences, Universitas Padjadjaran. This research aimed to determine the stages of ovarian development of hampala barb, and determine the types of spawning. The hampala barb in the Jatigede Reservoir had five stages of oocyte development, namely chromatin nucleolus stage, perinucleolus stage, cortical alveolus stage, vitellogenesis, and oocyte maturation with multi-spawner group synchronous type of ovarian development.
Fish community structure before reservoir inundation in Cipanas, West Java
Authors: Herawati T , Syaiful I M , Bangkit B S I , Sahidin A , Yustiati A , Dhahiyat Y , Iskandar  
Published: August 2020

Abstract
The reservoir is an artificial lake created by blocking the flow of the river using transverse construction of the river or dam made of rock, soil or walls. The purpose of the research was to determine and map the structure of fish community before reservoir inundation in the Cipanas River. The study used survey methods with sampling data collection techniques. The research station was determine using a purposive sampling method. The study was conducted at three stations representing inundation plan areas (6° 41’51 “S and 108° 01’32” E) and after inundation plans (6° 38’53 “S - 108° 02’06” E and 6° 37’51 “S - 108° 02’53” E) of Cipanas Reservoir. The parameters measured included relative abundance, diversity index (H’), dominance (C), uniformity (E), and water quality. Fifteen fish species of seven families were collected from Cipanas River. The diversity index was moderate which ranged of 1.20 ≤ H ≤ 2.08, the dominance index was low to moderate which ranged of 0.16 ≤ C ≤ 0.51, and the uniformity index was low to moderate which ranged of 0.27 ≤ E ≤ 0.47. The structure of the fish community at the station I was relatively unstable, while at stations II and III were classified as depressed. Water quality in the Cipanas River was in a good condition and support the life of fish based on the water quality standards class II and III according to the Government Regulation no. 82 of 2001.
Diversity of riparian vegetation to support the life of ihan (Tor spp. and Neolissochilus spp.) in Bonandolok River, North Sumatra
Authors: Paramitha I G A A P , Larashati S 
Published: August 2020

Abstract
The variety of riparian vegetation to support the life of ihan (Tor sp.) in the Bonandolok River in North Sumatra was studied. Ihan is an endemic species in Bonandolok that has been considered in the red list of species by the International Union for Conservation of Nature and Natural Resources (IUCN). Since ihan is almost extinct in its natural habitat, a research that relate to their habitat became crucial. Riparian vegetation plays an essential role in keeping ecosystem balance. Degradation of the riparian area not only triggers sedimentation but also change the microhabitat. It is thus vital to know the relation between the riparian vegetation and ihan. This research was conducted in April 2019 through the survey method at four stations (St. 1 the upstream, St. 2 upstream-middle part, St. 3 middle-downstream part, and St. 4 the downstream). The survey recorded a total of 51 plant species within 31 families. Tithonia diversifolia A. Grey was found as the most abundant species during the study (136 individuals). Station 2 was the station with the most species (23 species), and station with the most abundance of riparian vegetations was station 3 (262 individuals). The result of this study calls for the critical consideration supporting the efficiently riparian vegetation conservation as a habitat and food source of ihan in Bonandolok River.
The changes of property-rights regimes and lake degradation: an institutional analysis of Lake Rawapening
Authors: Irawan E , Haryanti N 
Published: August 2020

AbstractThe effects of various property-rights regimes on natural resource systems have long been debated among scholars and practitioners. A large number of studies have investigated the relationship between various property-rights regimes and environmental outcomes and show that public, state, and private property regimes are each capable of producing sustainable environmental outcomes. However, the evidence is very diverse. This study examined how the changes in property rights regimes at the local level have impacted on lake degradation using an institutional economics perspective, specifically the property rights approach, by taking Lake Rawapening as the case. Lake Rawapening is a multifunctional semi-natural lake currently degraded where almost 70% of its surface is covered by water hyacinth and experiencing rapid siltation. This research used a case study method. Data and information were collected from in-depth interviews with key informants, government officials and reviews of reports and documents related to Lake Rawapening. Results of the study reveal that the current property rights regime in the lake and its catchment areas associated with social changes was driving local resource users towards greater lake degradation. There were opportunities to build on existing village-level institutions to develop collaborative management systems to help protect the lake ecosystem.
Sumatran major lakes: limnological overviews
Authors: Lukman  , Syawal M S , Maghfiroh M 
Published: August 2020

Abstract
Sumatra’s major lakes are uniquely interesting because they were formed mainly by the Great Sumatra Fault and also affected by volcanic processes. Eight large Sumatran lakes, as major lakes, have played important roles for local people and been part of a significant study of Limnology in Indonesia. These lakes include Laut Tawar, Toba, Maninjau, Singkarak, Diatas, Dibawah, Kerinci, and Ranau. The utilization of lakes can be for several purposes: fisheries, tourism, and other activities that have developed rapidly in the last decade, such as aquaculture in floating net cages. Activities in the waters and the surrounding areas of the lake have had impacts on the trophic status and the decrease of native fish populations. In this paper, the environmental conditions of the lake were comprehensively reviewed.
Public perception and contribution of domestic waste to water pollution of Lake Matano, South Sulawesi-Indonesia
Authors: Melati I , Maghfiroh M , Jasalesmana T 
Published: August 2020

Abstract
Lake Matano, one of the deepest lakes on the earth, is an important lake in Indonesia in related to to its economic, social and ecological implications. The lake has a variety of functions, including water resource for hydro-power generating, the habitat of various aquatic organisms, and water sources for domestic purposes, as an area of fishing and fish culture in floating net cages, and tourist destinations. Therefore, Lake Matano receives an amount of pollution load from these activities. This study aims to determine the public perceptions and contribution of domestic waste to water pollution of Lake Matano. This research was conducted based on a survey, in which data collection techniques were complete by direct interviews with residents using questionnaires and direct observation of the condition of the surrounding community. The results showed that public perceptions of the water pollution of Lake Matano were due to tourism and increasing settlement in the area bordering the lake (floating house). The criteria for the action of water pollution in Lake Matano through domestic waste were still in good category.
Segmentation of Sumatran Fault Zone in Tanggamus District, Lampung based on GPS Displacement and SRTM Data
Authors: Alif S M , Ardiansyah M I , Wiyono S 
Published: August 2020

AbstractOne of sources of earthquakes in Lampung Province is southern segment of Sumatran fault. The fault is used as consideration in generating hazard map which source comes from stress accumulation of crust which can be obtained by measurement of points in surface. Determining fault location is important for sustainable development in Lampung Province. Southern segment of Sumatran fault stretched on Kota Agung – capital of Tanggamus District, one of the cities with the oldest civilization in Lampung Province. The sedimentation of Kota Agung causes the delineation of Sumatran Fault Zone by using Digital Terrain Model conducted on previous research had flaw. GPS Displacement Data, Shuttle Radar Topography Mission (SRTM) Data and seismic activity are used as tools to determine the location of fault. SRTM Data has 30 meter resolution and measured in 2018. Seismic activity used in this research is obtained from USGS from last 100 years and is used as support data to determine whether the fault delineated with SRTM and GPS displacement is active. GPS displacement is derived from GPS coordinates measured periodically from 2006 to 2019. Displacement used in this research is horizontal displacement since Sumatran Fault is known as strike-slip fault that move on horizontal plane. The result resembles previous research. Location that has the highest possibility of Sumatran Fault Zone segmentation is identified as Sumatran Fault Zone segmentation on previous research named as West Semangko Fault, and East Semangko Fault, respectively. The only fault earthquakes occurred on location which is not identified Sumatran Fault Zone segmentation on previous research.