bluuebunny/crossref_metadata_2025_split huggingface dataset:
Phytoplankton performance in supporting primary productivity in the intensive culture system of vannamei shrimp
Authors: Pratiwi N T M , Widigdo B , Yasin A , Soffyan J , Iswantari A , Wulandari D Y 
Published: May 2021

Abstract
Plankton is an important element in supporting successful shrimp production, including in intensive ponds with high stocking densities and high frequency of feed application. This influences phytoplankton dynamics due to changes in water conditions. This study aims to analyze the dynamics of primary production related to the performance of the phytoplankton community and water quality in the intensive pond system. Observations were made on primary productivity, phytoplankton community structure, and water quality. The results showed that Chaetoceros and Rhizosolenia appeared in all observation with high densities, followed by Nitzschia, Straurastrum, Oscillatoria, and Peridinium with less densities. The diversity and dominance indices of plankton were relatively low with moderate to relatively high evenness index. There was increasing primary productivity over time and fluctuated characteristics of water quality A strong correlation shown between nutrient (nitrate, nitrite and ammonium, and orthophosphate) and the abundance of phytoplankton that tend to increase due to the nutrients resulting from the decomposition. Diatoms mostly constructed the primary productivity of shrimp pond, which was supported by synchronous condition between organic matter and nutrients through the value of C/N and N/P, as well as the composition of plankton.
Fishermen perception on the sustainable utilization of freshwater glass eel (Anguilla spp.) on river estuaries in Sukabumi Regency
Authors: Rahmi I , Kamal M M , Setiawan Y 
Published: May 2021

Abstract
Glass eel (Anguilla spp.) are economically important commodities and being intensively exploited by fishermen in Sukabumi Regency, posing a high risk to overfishing and extinction. Socio-economic conditions are considered as the primary driving factor of such unmanaged utilization of these early life guilds. This study aimed to determine the socio-economic characteristics of glass eel fishermen affecting their perceptions and behavior in glass eel fishing. Primary data collection including in-depth interviews (n=30) and field observations was carried out at two main fishing areas in the estuary of Cimandiri and Cikaso river from July to August 2020. Whereas secondary data was literature inquiries based on previous research. The data collected was analyzed descriptively and with the Rank Spearman correlation test. The results showed that about 87.50% of fishermen have a high perception of glass eel stock is still can be utilized continuously so that their behavior in handling the catch is by modifying their fishing gears. In Cikaso estuary, fishermen developed the traps in addition lift net and scoop net as fishing gear, while in Cimandiri estuary is restricted to lift net. In the latter place, a community watching group (pokmaswas) has been established as community participatory in coastal ecosystem protection.
Different of aeration rate on hatching rate, abnormality, yolk sac absorption, and absolute length of newly hatched larvae of mahseer (Tor soro)
Authors: Rizkiya I , Setiadi E , Yunita E , Taufik I 
Published: May 2021

Abstract
Mahseer, Tor soro is a local freshwater fish species that has an economical value in Asia including Indonesia. Environmental factors such as aeration, temperature, pH, and salinity affect the high of abnormality and unstable hatching rate. The purpose of this experiment is to determine of aeration rate on hatching rate, abnormality, yolk sac absorption, and absolute length of newly hatched larvae. The treatment of aeration rate are as followed: A) 0 mL/minute; B) 500 mL/minute; C) 1000 mL/minute; D) 1500 mL/minute; E) 2000 mL/minute. The result shows that the aeration rate affects the abnormality, yolk sac absorption, and absolute length of newly hatched larvae (p<0.05). The abnormality at 0 mL/minute was the highest (23.23 ± 0.26%) and the lowest (2.84 ± 0.36%) at 500 mL/minute. The yolk sac absorption 0.1268 ± 0.0056 mm3/day at 1500 mL/minute was the highest compared to the others (p<0.05). The absolute length of newly hatched larvae at 1500 mL/minute (4.6435 ± 0.2518 mm) was the highest compared to the others (p<0.05). The dissolved oxygen value was increased by increasing the aeration rate. The optimal aeration rate for egg incubation should be adjusted to 1000 mL/minute to reduce the abnormality and optimize for larval grow.
The effect of papain enzyme in various doses to the growth and intestinal of cantang grouper (Epinephelus fuscogutattus lanceolotus)
Authors: Rostika R , Pratiwy F M , Permana R 
Published: May 2021

Abstract
This research was carried out to observe the appearance of the cantang grouper (Ephinephelus fuscogutattus lanceolotus) intestine which was fed with exogenous papain enzyme-added, and the fish were raised in the cage on the coast of Pangandaran, West Java Province from January to March 2019. A completely Randomized Design Method in this study was performed with five treatments and three repetitions with enzyme doses of 0%, 1.25%, 2.5%, 3.75%, and 5% for 60 days. The fish used were two months old with an average weight 20 ± 10 g and randomly placed in fifteen cages with the size of 1m × 1m × 1.2m. All fish were fed commercial diets (CP: 40%) at a feeding level of 5% sampling was carried out every 10 days for 60 days. The Average Daily Gain (ADG) calculation was done by calculating the initial and final weights, the fish were dissected and the intestine conditions was carried out by taking the digestive tract from the anterior to the posterior. The parameters observed were ADG and intestine conditions (number of villi, villi length, necrosis, and goblet cells) in the region of anterior, midterior, and posterior. The results showed that the ADG was significantly different in all treatments, the best was the addition of enzymes 3.75% and 5 % namely 2.26 and 2.30 gram/day. The number of villi at the anterior intestine was 32, the length of villi was 290.34 μm, necrosis cells was 39 and goblet was 168. Meanwhile, at the midterior the number of villi was 26, the length of villi was 275.18 μm, necrosis cells was 47 and goblet was 177. The number of villi at the posterior was 28, the length of villi was 277.26 μm, Necrosis cells was 56 and goblet was 201. Overall it can be concluded that the feed was added with papain enzyme of 3.75 % shows a significant effect on the growth and intestinal conditions of the Cantang grouper.
The development of adapted marmorated medaka Oryzias marmoratus (Aurich, 1935) at ex-situ habitat
Authors: Said D S , Mayasari N 
Published: May 2021

Abstract
Marmorated Medaka (Oryzias marmoratus) is a small endemic fish species of Malili Lakes, South Sulawesi, Indonesia. The fish is a valuable commodity as an ornamental fish. However, their population in wild is threatened with extinction and has been categorized as vulnerable by IUCN. An effort to conserve O. marmoratus by ex-situ breeding is necessary for its sustainability. Research Center for Limnology-LIPI has succeeded to take the fish from Lake Towuti and adapted them in an ex-situ habitat (laboratory) (2017–2018). Research on the development to adapt O. marmoratus outside their natural habitat has been conducted in 2019-2020. The sex ratio of male: female was 1:2 (1:2.223±0.638). During mass spawning, the fish was able to reproduce seven times in 37 days which the dark moon phase. Egg diameter (mm) was 1.193±0.017. Reproduction viability was very good. Fertilization and hatching rates were 100% and 98.149±3.347%, respectively. Length of Incubation Period (LIP) (days) was 7.286±1.329, and the larva size (mm) was 3.3±0.483. Survival Rate on seven days (SR7) was 97.02112±5.510 % with larva size of 5.5±0.707. Juvenile size (mm) at 16 weeks was 33.6±5.661 (26–42). Oryzias marmoratus can be developed in ex-situ habitats and still needs further research.
High catch of Sardinella lemuru (Bleeker, 1853) and plankton abundance in Prigi Waters: Case study in 2017 and 2019
Authors: Sartimbul A , Kasitowati R D , ‘Izza M K , Fauzia S S 
Published: May 2021

Abstract
Prigi Waters, East Java, is known as a fishing ground for mackerel tuna and other tunas. However, at the end of 2019, it was found that Bali Sardine (Sardinella lemuru) was a dominant caught that reach more than 56% of the total catch. The reason for the high fish abundance in 2019 is still unknown. Therefore, this study aims to understand the relationship between S. lemuru catch and plankton abundance in Prigi Waters during the high catch event and comparing a similar study in 2017. Plankton abundance was analyzed using the APHA method. Pearson correlation analysis was used to express the relationship between S. lemuru catch and plankton abundance. The result showed that the composition of zooplankton and phytoplankton in waters was 52.8:47.2. Class Bacillariophyceae dominated the phytoplankton group in Prigi waters (47%), where Actinocyclus is the most common genus found (28,762 cell/m3). While in the zooplankton group, the class Maxillopoda dominated (75%), where Nauplius is the most common genus found (34,876 ind./m3). The Pearson correlation analysis showed that S. lemuru catch in November 2019 was greatly influenced by phytoplankton (61.32%) than zooplankton (21.38%) abundances, and the rest was influenced by other factors. High and low plankton abundance in 2019 and 2017 has implications to high and low catch of S.lemuru, respectively. It is suggested that routine and continuous monitoring of plankton may provide good information for fisheries prediction and management in Prigi Waters.
Fat, water and ash content in Chlorophyceae, Rhodophyceae and Phaeophyceae macroalgae at Sepanjang Beach, Yogyakarta, Indonesia
Authors: Setyorini H B , Puspitasari A 
Published: May 2021

Abstract
Communities in Sepanjang Beach have utilized the macroalgae as main ingredients in various special processed products. The objective of this study was to analyze the content of fat, water, and ash in Chlorophyceae, Rhodophyceae, and Phaeophyceae macroalgae at Sepanjang Beach, Yogyakarta, Indonesia to support optimization of macroalgae processed products. This research was conducted at Sepanjang Beach, Gunungkidul District, Yogyakarta, Indonesia in August 2020. A method of descriptive exploratory was used in this research. Analysis of fat content, water, and ash content was carried out on Ulva lactuta, Palmaria palmata, Sargassum crassifolium, Gelidium spinosum, Gelidiella acerosa, and Gracilaria verrucosa quantitatively using Soxhlet method for content of fat, the thermogravimetric method for content of water, and gravimetric method for content of ash. The results showed that the highest fat, water, and ash content was found in U. lactuta in the central of Sepanjang Beach 0.174%, S. crassifolium in the eastern 89.460%, and U. lactuta in the eastern 8.715% respectively.
Sound character of the coconut crab (Birgus latro) of Bacan Island
Authors: Shintia I , Hestirianoto T , Sulistiono  , Wildan D M , Simanjuntak C P H , Islami D 
Published: May 2021

Abstract
Coconut crab (Birgus latro) is a unique land living crustacea, that has economical value in some countries. While the abundance of crab in nature is very rare. The crab is nowadays being a protected organism. The study aims to determine the characteristics of sound produced by the coconut crabs. The data collection was conducted in November-December 2018. The sound was recorded in the new moon, using a microphone, TOA and recorder. Data of the sound was analyzed using software Wavelab, Matlab, and Excel. The sound type obtained by the coconut crab was snap sound that is used for repelling an opponent to came, and stridulating sound used for communicating. Male coconut crab producing stridulating sound to attract the female. The results of this study indicate that the snap sound had high frequency sound with a range of 400-500 Hz, but it was a high intensity sound. While the stridulating sound has a relatively high frequency with a range of 300-400 Hz, but low in its intensity.
Socio-Ecological System perspective of seagrass ecosystem in Wakatobi
Authors: Sjafrie N D M , Rahmadi P , Kurniawan F , Triyono  , Supriyadi I H 
Published: May 2021

Abstract
The Socio-Ecological System (SES) perspective is widely used to identify and explain the relationship between seagrass ecosystem and their dependent community. These relationships can be recognized when humans utilize the seagrass ecosystem that benefits as a dependent community. Further, these utilization patterns can be used as a basis for managing the seagrass ecosystems themselves. This study was conducted to identify and map the relationship between seagrass ecosystem and their communities in Wangi-wangi Island, Kaledupa Island and Tomia Island. The data were collected in June–July 2019 through observation, focused group discussions and interviews with 59 respondents. The relationship between the seagrass ecosystem and its community was analyzed descriptively. The results show that the SES built a simple pattern. Seagrass ecosystems were used as the main source of daily food for island people. Seagrass products were traded limited inside the island. Resource users, infrastructure providers, as well as public infrastructure formed a short-chain. It is important to preserve the condition of seagrass ecosystems by ensuring existing legal rules and local wisdom to enhance the SES.
Increasing the water stability of sinking feed grits using edible fungal hyphae for reducing aquatic waste: A laboratory study
Authors: Sriherwanto C , Purwaningsih R H , Yunita E , Suja’i I 
Published: May 2021

Abstract
Binding agents and extruder machines are commonly used to produce aquafeeds with high water stability, preventing feed disintegration and wastage. This technique is complicated and costly. The alternative use of living microorganisms as the binding agent without a high-temperature extrusion has been studied. This research aimed at increasing the water stability of sinking-aquafeed grits using edible fungal hyphae as a binding agent through fungal fermentation, with and without subsequent oven-drying. Commercial sinking pellets were pulverized and subjected to 3 different treatments: fermentation and oven-drying, fermentation without oven-drying, and oven-drying without fermentation. Results showed that the oven-dried unfermented aquafeed disintegrated and sank in water. In contrast, the fermented feeds, with or without oven-drying, showed better stability and floatability in water. The combination of fermentation and oven-drying produced the highest water stability of 73.59 ± 12.13% as well as the highest floatability of 86.67 ± 5.77% at the 120th minute. These values were higher than the undried fermented feed (36.90 ± 0.83 water stability and 74.0 ± 8.94% floatability). Thus, the fungal hyphae possessed the ability to bind the aquafeed constituents, enhancing the water stability and floatability, which was further improved by oven-drying.
Estuarine fish community structure in Banten Bay Indonesia
Authors: Sugiarti  , Nasution S H , Sulistiono  
Published: May 2021

Abstract
Fish community structure in the aquatic environment including estuarine often affected by water quality and condition surrounding the aquatic area. Banten Bay is close to several activities that could affect water quality and its biota. This research aims to reveal the fish community structure in four estuaries in Banten Bay. Fish and water were sampled in May, July, and October 2013 in the estuarine area i.e. Wadas, Cibanten, Cengkok, and Pamong in the Banten Bay. Fishes were collected using several fishing gears which are commonly used by fishermen in each sampling station and identified in the laboratory. Four types of fishing gears were used for the sampling i.e.beach seine (Wadas), lift net (Cibanten), beach seine (Cengkok), and mullets gill net (Pamong). Several water qualities were measured and analyzed using Pollution Index methods. Trophic status was analyzed using TRIX methods. Seventeen species of fishes were collected in Wadas, twenty species in Cibanten, fifteen species in Cengkok, and one species in Pamong. Fish Diversity Index was the medium category in Wadas, Cibanten, and Cengkok estuaries while it was the low category in Pamong estuarine. Water quality that slightly polluted with the richness of nutrients supported the abundance of fishes at four estuaries in Banten Bay.
Current status of coral reef ecosystems in Brumbun Bay, Tulungagung
Authors: Sukandar  , Dewi C S U , Capriati A , Prabuning D , Maududi A , Harsindhi C J 
Published: May 2021

Abstract
Coral reefs play a vital role in providing habitat for reef fish and other invertebrates, yet there is increasing pressure on the systems. Moreover, only a few studies and information were provided about coral reef’s status in Tulungagung. The purposes of this study were to determine substrate cover, diversity of reef fish, and invertebrates. The study was carried out in Brumbun Bay, Tulungagung in October 2017. The methods were done by diving at depths of 9 to 14 meters. The data obtained then were analyzed descriptively to describe the current status of coral reefs. The result showed that 34% of the substrate was covered by hard coral, 45% by sand, rock, coral fragments, soft corals, and algae. Snapper is known as a reef fish group that is more commonly found. The results showed that there were no invertebrates found during the dive. Based on the results, the status of coral reefs in Tulungagung was rated moderate. It is imperative to note down that trash nets and plastic waste was found frequently. This study provides crucial information about the current status of coral reefs in Brumbun Bay, Tulungagung which in the future can be used as a reference study.
Phytoplankton diversity and functional group in three urban lakes of Cibinong, West Java, Indonesia
Authors: Sulastri  , Akhdiana I 
Published: May 2021

Abstract
Urban lakes are rapidly becoming vulnerable because of such as anthropogenic pollution and urbanization. Phytoplankton is classified as a biological indicator of lake status. Study was conducted to determined and compared diversity and functional group of phytoplankton including environmental factors in three urban lakes of Cibinong, West Java, Indonesia. The data was collected twice a month from July to October 2018. Three urban lakes showed a different water quality. Phytoplankton composition consists of Chlorophyta, Bacillariophyta, Chrysophyta, Cyanophyta, Pyrrhophyta, Cryptophyta and Euglenophyta division Chlorophyta is more diverse group than other divisions in those three urban lakes. High abundance of Chlorophyta was found in Situ Cibuntu. In Situ Lotus, high of abundance was represented by Bacillariophyta. Temporally, in August, the percentage abundance changes from Chlorophyta to Chrysophyta in Situ Dora. Based on the index diversity, Situ Dora is more stable habitat than Situ Cibuntu and Situ Lotus. The index diversity (H’) and Evenness (J) value of Situ Dora, Cibuntu and Lotus, H’: 1.41-4.03, J: 0.4-0.98; H’: 0.65-2.61; J: 0.2-0.76 and H’: 0.12-2.19, J: 0.11-0.57, respectively. The stability of habitat in Situ Dora was also indicated by the balance of phytoplankton functional group.
Spatial variation of phytoplankton and some physico-chemical variables in Lake Tempe, South Sulawesi
Authors: Sulawesty F , Yustiawati Y 
Published: May 2021

Abstract
Lake Tempe in South Sulawesi is one of the floodplain lakes in Indonesia that has a unique phytoplankton characteristic. This study aims to see the abundance of phytoplankton and their relationship with physico-chemical parameters in Lake Tempe. Observations were conducted in March and May 2017 in six zones of the lake, consist of 5 zones are non-permanent areas and 1 zone are permanent area. Dissolved oxygen, pH, temperature, turbidity, total dissolved solids, transparency, chlorophyll-a, total nitrogen, and total phosphorus were measured to determine the water quality. Phytoplankton abundance was calculated using the Sedgewick Rafter Method. Phytoplankton community structure was analyzed by Diversity Index, Evenness Index, and Dominance Index. A total of five phyla and 80 species of phytoplankton were found in Lake Tempe, consists of Bacillariophyta, Chlorophyta, Cyanophyta, Dinophyta, and Euglenophyta. The abundance of phytoplankton ranged between 1,133–701,390 individual L−1. Moderate to high diversity (1.751–3.859) and low uniformity (0.069–0,306) among species in the phytoplankton community was found in Lake Tempe. The dominant species was found at two sampling sites (Z.2.1 and Z.2.2), namely Aphanocapsa. The presence of Cyanophyta in Lake Tempe is related to the total phosphorus value.
Fish community structure in Sermo Reservoir, Yogyakarta, Indonesia: Initial study on invasive fish species
Authors: Suryandari A , Hedianto D A , Indriatmoko  
Published: May 2021

AbstractInvasive species are becoming issues in freshwater ecosystems throughout the world including Indonesia. Sermo Reservoir is located in Yogyakarta, Centra Java, was indicated to have invasive species identified as Cichlidae family. The study aimed to assess fish communities’ structure and identified invasive fish in Sermo Reservoir. The research was conducted in Sermo Reservoirs, Yogyakarta, Indonesia on March-October 2019. In total, about 3,084 individuals of 10 fish species belonging to 3 families and 8 genera were captured using a experimental gillnets (mesh size 0.75; 1; 1.5; 2; 2.5; 3 inch) at five stations. The fish community in Sermo Reservoir was dominated by Cichlid fish (98.66%). Red devil (Amphilophus labiatus) and Midas cichlid (A. citrinellus) were dominant species founded in Sermo Reservoir (58.82% and 37.00%, respectively). Another species of cichlid that caught consist of nile tilapia (Oreochromis niloticus), mozambique tilapia (O.mossambicus), and jaguar cichlid (Parachromis managuensis). The study showed thatAmphilophusspp. have high dispersal (One-way ANOSIM revealedAmphilophusspp. was not significantly different for spatio-temporal (p>0.05)). SIMPER analysis (p < 0.05) showed thatA. citrinellusandA. labiatushad spread throughout the waters and were concentrated in Tegiri station which had more littoral zones.
Management strategy of plastic waste in the Cimandiri River-Sukabumi, West Java
Authors: Taryono  , Wulandari D Y 
Published: May 2021

Abstract
Plastic waste is an emerging global and national issue. However, the global concern about plastic waste in the river system is even decreasing. Cimandiri Watershed is the most important watershed within the Sukabumi Regency area which flows to the Palabuhanratu Bay. Nowadays, the plastic pollution of the Cimadiri River water that ends up in the coastal area of Palabuhanratu becoming a sensitive and critical issue. Plastic waste directly threatens local coastal tourism as a major activity of the local economy. Each stakeholder is aware that plastic pollution is a consequence of anthropogenic activities along the stream of the Cimandiri River that are becoming widespread. Several policy steps have been taken by the local government, to resolve the issue and remain unsuccessful but they are still not successful. To resolve the problems, this paper aims to perform policy analysis to formulate the necessary priority policy strategy. The cause-effect analysis and gap analysis were used to resolve the appropriate plastic waste management behavior and management strategy. The management strategies for the proper management of plastic waste management in the Cimandiri River are improving community behavior by raising public knowledge, implementing legal regulation and social processes, developing technological innovation for the handling of transported plastic waste in the river flows and temporary community-friendly landfills, conduct more 3R (reduce-reuse-recycle) and waste bank management training and build policy affirmations on improving the management of plastic waste.