bluuebunny/crossref_metadata_2025_split huggingface dataset:
The exploitations status of the orange mud crub (Scylla olivacea Herbst, 1796) in Aru Islands and adjacent waters, Maluku, Indonesia
Authors: Pane A R P , Alnanda R , Herlisman  , Suman A 
Published: October 2020

Abstract
The increasing exploitation and fishing of the orange mud crab (Scylla olivacea) are threats against the sustainability of the crab resources. Therefore, it is critical to carry out a scientific study that can serve as the basis of the fisheries management. This study was carried out from March to November 2019 several crab landing sites in Aru Islands (Dobo). It employed survey and monthly data collection methods, assisted by an enumerator. The results revealed that the capace width orange mud crab was of 110–185 mm in size where 135 mm was the dominant size and 137.8 mm was the capace width at first capture (CWc). Its growth rate (K) was 0.59 per year and its asymptotic capace width was 191.5 mm. The recruitment of the species occurred all year long, peaking in February at 18.53%. Its fishing mortality (F) was 0.74 per year, while its natural mortality (M) was 0.77 per year. The exploitation rate (E) of the orange mud crab was 0.49% (moderate state). To ensure the sustainability of the crab resource in Aru Islands, people should be advised to maintain the sustainability of the crab habitats, i.e. the mangrove forests, and not to capture the orange mud crabs below 120 mm in size.
The power of biodegradation and bio-adsorption of bacteria symbiont sponges sea on waste contaminated of polycyclic aromatic hydrocarbons and heavy metals
Authors: Marzuki I , Daris L , Nisaa K , Emelda A 
Published: October 2020

Abstract
Sponge is often used as a bio indicator and bio monitoring in determining the level of heavy metal contamination in the sea. The purpose of this research is to analyze the destruction of PAHs and the reduction of heavy metal toxicity. Biodegradation and bio-adsorption occur with a 30-day interaction between bacterial symbiont sponge suspension against modified liquid waste containing a mixture of PAHs (naphthalene) contaminants, heavy metals Cr (VI) and Cd (II). The period of interaction of bacteria with heavy metals for 15 days, bio-adsorption power was determined using AAS, while the interaction with PAHs, the level of biodegradation was measured using GC-MS and Infrared Spectrophotometer. The results achieved bacteria BP and PS, have biodegradation and bio-adsorption activities against extreme waste contaminated with a mixture of naphthalene and heavy metal. The level of biodegradation of BP bacteria to naphthalene is weaker than PS bacteria. The bio-adsorption power of PS bacteria is higher for Cr (VI) and Cd (II) ions. The components of naphthalene in extreme waste inhibit the bio-adsorption performance of BP and PS bacterial, conversely there is an effect of inhibition of bacterial activity on the biodegradation process of naphthalene by the presence of heavy metals.
Circulation dynamics of the Banda Sea estimated from argo profiles
Authors: Ismail M F A , Taofiqurohman A , Purwandana A 
Published: October 2020

Abstract
The Banda Sea is a semi-enclosed marginal basin in the eastern tropical Indonesian waters. The circulation in the region displays strong seasonality in response to the seasonally reversing monsoon wind system. Yet, the basin is one of the least studied regions when it comes to the circulation dynamics – until now. Here, we present an analysis of an Array of real-time geostrophic oceanography (Argo) floats data during the period August 2017 to August 2019. The aim of the study is to investigate the spatial and temporal variability of circulation in the Banda Sea. Our study demonstrates the presence of cyclonic circulations, upwelling and downwelling with strong seasonal variability in the eastern part of Banda Sea off Maluku Island. It appears from the Argo temperature-salinity data that the subsurface cold and salty water shoals up during the southeast monsoon due to Ekman transport. Our study highlights the importance of Argo floats in elucidating the circulation in the Banda Sea.
Computational analysis of ethyl acetate extract of Nauclea subdita (Korth.) Steud. leaves as peptidoglycan glycosyltransferase inhibitor in Aeromonas hydrophila
Authors: Aisiah S , Olga  , Tanod W A , Salosso Y , Bambang  , Riyadi P H 
Published: October 2020

Abstract

Aeromonas hydrophila is a cause of Motile Aeromonad Septicemia (MAS) disease in freshwater fish, which is often endemic and causes significant losses in a freshwater fish farming business. Aeromonas hydrophila belongs to the group of gram-negative bacteria and has a complex cell wall consisting of three layers, namely the outer layer in the form of lipoprotein, the middle layer in the form lipopolysaccharide and the inner layer in the form of peptidoglycan. GC-MS analysis of ethyl acetate extract of Nauclea subdita leaves was assayed in silico. Seven compounds from GC-MS analysis have potential as glycosyltransferase peptidoglycan inhibitors with highest probability of being active. Peptidoglycan glycosyltransferases play a role in the cell cycle, cell shape, and cell wall. In this study, we conducted a molecular docking of seven compounds for peptidoglycan glycosyltransferase. Binding Affinity Energy (Kcal/mol) of seven compounds was better than beta-lactam as a comparative control. The seven of fourteen compounds found also adhere to Lipinski’s rules on five criteria to indicate these compounds being safely used as oral drugs.
Novel design and implementation extraction 137Cs from seawater integrated with water quality checker
Authors: Yahya M N , Suseno H , Makmur M , Irawan D , Priasetyono Y , Prihatiningsih W R 
Published: October 2020

Abstract
The main source of 137Cs radioactive releases categorized as global fallout came from nuclear weapon experiments in the past as well as nuclear accidents of the Chernobyl and Fukushima nuclear power plant that occurred in 1986 and 2011. Radioactive contamination in the atmosphere will be deposited on land and dispersed through the water. The existing operational nuclear facilities and government plan to construct an Experimental Power Reactor in the Serpong Puspitek area could potentially release radioactive 137Cs through the Cisadane river towards into Jakarta Bay. Environmental monitoring of fission products is required to control the level of radioactivity of the marine environment when the new nuclear facilities and existing facilities operate. On the other hand, the old unit has a weakness of adsorption efficiency and suspected not perfectly coated in filter cartridges. Compared with the old design, this unit easily mobilized and integrated with the measurement of seawater parameters refers to pH, conductivity, and temperature. This unit fulfilled IAEA analytical guidelines with the results of decision threshold and detection limit were 0,13 mBq/l and 0,29 mBq/l respectively, also the results of the relative bias and precision test are below the permissible limit.
Evaluation of land suitability of Kappaphycus alvarezii cultivation in the dry and rainy season
Authors: Aris M , Labenua R 
Published: October 2020

Abstract

Kappaphycus alvarezii seaweed is one of the important economically valuable commodities. Kappaphycus alvarezii is one of the macro algae species that has many benefits. Kappaphycus alvarezii seaweed cultivation is the dominant mariculture activity on Panggang Island, DKI Jakarta. The condition of the quality of the aquatic environment greatly affects the production of Kappaphycus alvarezii seaweed. This study aims to analyze the suitability level of Kappaphycus alvarezii seaweed cultivation in the dry season and rainy season. This research was carried out in Panggang Island, DKI Jakarta during the dry and rainy seasons. The observed environmental quality parameters include the physical physics parameters, namely temperature, current speed, brightness, and depth observed in situ. Aquatic chemical parameters namely salinity, pH, dissolved oxygen observed in situ and nitrates and phosphate observed in ex-situ. In order to get a classification of the suitability level, the suitability of the marine matrix is made through scoring and weighting on the parameters limiting seaweed farming activities. Based on the results of the study it can be concluded that the suitability of the waters on Panggang Island, DKI Jakarta is very suitable (Sl) for Kappaphycus alvarezii cultivation both during the planting period in the dry season or the rainy season.
Fishing season and participatory mapping of the fishing ground of target fish in Depapre Bay, Jayapura Regency, Papua Indonesia
Authors: Paulangan Y P , Rumbiak K , Barapadang B 
Published: October 2020

Abstract
Fisheries resources, especially small-scale fisheries in the Depapre Bay, Jayapura Regency, which is quite potential, have not been utilized optimally. However, the damage to supporting ecosystems has begun to occur. The aims of this study were to inventory the target fish resources, study the pattern of the fishing season, and determine the fishing ground area in the Depapre Bay in a participatory manner. The method approach used in this study is a semi-structured study to document and evaluate small-scale fisheries management systems in a participatory manner with several data collection techniques, namely with focus group discussions, in-depth interviews, and recording and documentation. There are around 14 target fish families in the Depapre Bay that have been identified, which are grouped into pelagic fish and demersal fish. The pelagic fish group of the Scrombidae family has a fishing season of around May-November, namely in the east to the west season with the fishing ground outside the bay, while the demersal fish group generally has a fishing season of around May-February or occurs from the beginning to the end of the western season with the fishing ground in the bay and around Tanjung Tanah Merah, which is caused by the physiographical and oceanographical factors of the Depapre Bay. Considering the above conditions, it is necessary to pay attention to stakeholders, especially the local government. In addition to the community empowerment to improve technology, the limited reach of fishermen should also be taken into consideration. Conservation zoning should be based on the fishing ground areas by paying attention to the existing the Tiaitiki local wisdom system.
Physical characteristics of artificial nori made from Ptilophora pinnatifida and Moringa oleifera leaves
Authors: Andriani R , Wulansari A , Dewi E K , Husen A H 
Published: October 2020

Abstract
Artificial nori is a potential alternative to fulfil the need of nori (dried Porphyra) in Indonesia. Ptilophora pinnatifida naturally does not have green colour. Moringa oleifera leaves can give natural green colour to the artificial nori made from Ptilophora pinnatifida. The aim of this study was to produce an artificial nori which had a close physical characteristics as the commercial nori. This study was an experimental research using the concentrate of Moringa oleifera leaves as variable. The concentrate was consisted of 4%, 6%, and 8% (w/w) of Moringa oleifera leaves. The artificial nori made from mixture of Ptilophora pinnatifida and Moringa oleifera leaves were analized it’s colours (L, a, and b), thickness, tensile strength, and elongation. The result showed, the artificial nori with 8% addition of Moringa oleifera leaves had the closest physical characteristics as the commercial nori. It had 0.25 mm of thickness, 1.22 kg/cm2 of tensile strength, 7.67% elongation, colour L 28.05, colour a 2.90, and colour b 10.31. The concentrate of Moringa oleifera significantly affected the colours, tensile strength, and elongation of the artificial nori, while the tickness was not significantly affected by the concentration of Moringa oleifera.
Size distribution and population parameter of white-spotted wedgefish (Rhynchobatus Australiae Whitley, 1939) from the Eastern Indian Ocean, Indonesia
Authors: Faizah R , Chodrijah U 
Published: October 2020

Abstract
White Spotted Wedgefish (Rhynchobatus australiae, Whitley, 1939) is one of member Elasmobrachii family and it has economic value because of its fins valuable food source. The objective of the research is to determine population parameter and size distribution of White Spotted Wedgefish (Rhynchobatus australiae) from the Eastern Indian Ocean Fishing Region in Indonesia (WPP 573). A total of 407 samples were recorded from bottom longline fisheries at Tanjung Luar, Lombok from March 2014 to December 2016 by a trained enumerator. The size of sharks White Spotted Wedgefish varied from 95 mm to 323 m total length (TL), with average size was 222 mm. Size distributions and sex ratio between females and males were significantly different. Analysis on its population status showed that this species was very susceptible to overfishing. This condition should be responded by the government through management actions for its fishery.
Perspective on management strategic for sustainable development of coral reef fisheries at Ternate Island through ecosystem-based management approach
Authors: Rumagia F , Boer M , Kurnia R , Kamal M M 
Published: October 2020

Abstract
The coral reef fisheries activity at the coastal area of Ternate Island may impact the coral reefs’ resources and ecosystems in this region. Management and utilization of the coral reef fishery resources that are not accompanied by an understanding of the structure and function of each component of the ecosystem can increase disturbance to the ecosystem, and adversely affect the structural components of the coral reef ecosystem in the coastal area of Ternate Island. Management and utilization of the coral reef fishery resources that are not accompanied by an understanding of the structure and function of each component of the ecosystem can increase the amount of disturbance to the ecosystem, and adversely affect the structural components of the coral reef ecosystem in the coastal area of Ternate Island. The lack of information and understanding of the ecosystem structure and function makes harvest controls impractical in fisheries management. Spatial management, such as MPAs, community marine tenure, and comprehensive marine zoning, within restrictions on destructive and inefficient fishing gear, may lead to reversing the decline in coral reef fisheries and the associated ecosystem. The urgent need to reform coral reef management focuses on the interconnected system as linked social-ecological systems.
Effect of dietary probiotics SEAL on growth performance of red tilapia (Oreochromis sp.) nilasa strain
Authors: Aisyah I , Istiqomah I , Isnansetyo A 
Published: October 2020

Abstract
Aims of this study were to determine the effect of probiotic application on the growth performance and feed utilization of red tilapia nilasa strain juveniles. Yeast and bacterial strains of different origin (Saccharomyces sp., Enterobacter sp. JC10, Aeromonas sp. JC33, and Lactococcus sp. JAL12) were administered to fish in daily and three day intervals at dose of 5×104 CFU/gram feed. The control groups were only administered with fish pellet with saline buffer. The fish were stocked in 95 × 72 × 55 cm containers (50 each) and fed approximately 3 % of their body weight thrice a day for 62 days. Absolute, relative and specific growths of weight were examined at one and two months of probiotic application. Fish survival rate, total production, feed conversion ratio (FCR) were analyzed at the end of experiment. The results showed that probiotics application in fish affected absolute weight, relative weight, specific weight, and total production (P<0.05). No significant effects on fish feed utilization parameters were obtained. It is concluded that probiotics SEAL application is efficacious in the growth performance of tilapia nisala strain. The application with three-day interval improves the growth and total production of red tilapia similar to the daily probiotics application.
Seaweed Kappaphycus alvarezii cultivation production based on season in Indari waters, West Bacan Subdistrict, Regency of South Halmahera, Province of North Mollucas, Indonesia
Authors: Irfan M , Malan S , Muchdar F , Abdullah N , Juharni  
Published: October 2020

AbstractIndari is one of the coastal areas in the West Bacan Subdistrict, Regency of South Halmahera, Province of North Mollucas. Fisheries business activities that are quite popular in this region are aquaculture with seaweed commodities. Indari waters is also one of the areas designated as seaweed cultivation development zones in Province of North Mollucas. One of the factors that determine the success of a seaweed cultivation business is production. This is because production is the final result obtained from a cultivation business. The purpose of this research was to determine the production of seaweedK.alvareziicultivation based on seasons. The method used in the survey is a method of interviewing using questionnaires to seaweed farmers as many as 30 people. Production data collected is wet and dry production data by season. Production data collected is wet and dry production data by season. The results showed that the highest seaweedK.alvareziiproduction was found in the dry season with wet production of 9.320 kg and dry production of 852.5 kg, whereas in the rainy season, wet production was 898.125 kg and dry production was 718.5 kg.
Obligations and responsibilities of flag states related to IUU fishing based on ITLOS case no. advisory opinion 21 and its impacts to Indonesia
Authors: Maskun  , Napang M , Assidiq H , Al Muqni Ali M Muksyid 
Published: October 2020

Abstract
Illegal, unreported, and unregulated (IUU) fishing is still one of the biggest threats to the marine ecosystem. That is because IUU Fishing can damage a country’s national and regional efforts to manage fisheries in a sustainable manner and interface with efforts to conserve marine biodiversity. IUU Fishing has reached about 20 percent of the total world catch and up to 50 percent in some areas. IUU Fishing practices often use bonded labor, destructive fishing methods and deceptive actions to reap profits at the expense of the state’s local coastal fishing industry and the marine environment. Fisheries resources that should be available for fishermen are reduced due to IUU Fishing which can cause the collapse of local fisheries. Developing countries have proven to be very vulnerable because they have a large risk of being affected by illegal fishing, with the estimated total catch in West Africa reaching 40 percent higher than reported catches, such as exploitation rates severely almost sustainable management of marine ecosystems.
Potential, suitability, and carrying capacity of coral reef ecosystem in West Buleleng MPA
Authors: Windayati R , Marfai M A , Pangaribowo E H , Mardiatno D 
Published: October 2020

Abstract
Marine protected area (MPA) of West Buleleng, Pemuteran, Bali has the potential for the development of marine tourism activity through its coral reef ecosystem. Since 2011, the number of tourists visiting this area has been increasing every year and without proper management, it might harm the coral ecosystem. The purposes of this study are to analyze; the potential of coral reef resources based on the analysis of coral’s coverage area, the Tourism Suitability Index (TSI), and the carrying capacity to protect the coral reef ecosystem yet support the development of tourism activities in West Buleleng MPA. Data analysis methods consist of ecological analysis by measuring the potential and condition of coral reef ecosystems, the suitability index of tourism and the carrying capacity of the coral reef ecosystem. The results showed the potential of coral reef resources in West Buleleng MPA is fairly good with a percentage of coral cover about 57.08%. The suitability index of snorkeling and diving activities in the coral reef ecosystem was 76.9% with the carrying capacity of 36 tourists per day or 13.140 tourists per year for those tourism activities.
Performance of yellowfin tuna spawning (Thunnus albacares) in floating net cage
Authors: Tridjoko  , Setiadi A , Gunawan  , Hutapea J H , Setiadharma T , Selamet B 
Published: October 2020

Abstract
Yellowfin tuna (Thunnus albacares) is an important export commodity in Indonesia. This tuna has an important economic value, so it becomes one of the foreign exchange that can provide solutions to the national economy. Yellowfin tuna hatchery technology that was carried out at the Research Institute for Mariculture and Fisheries Extension, with the management of broodstock maintenance in floating net cages has successfully spawned. However, the quality and quantity of eggs produced are still not optimal. This research was conducted in floating net cage with a diameter of 48.8 m with a depth of 8 meters, filled with 30 fishes of yellowfin tuna with body weights ranging from 60-80 kg per fish. Feed given is: fresh fish, squid and added vitamin C and vitamin E. The parameters observed were : spawning frequency, number of eggs produced, hatching rate, egg diameter, diameter of oil globule and the survival activity index value of newly hatched larvae (SAI). As supporting data, water quality observations were carried out which included: temperature, salinity, and water brightness on the floating net cage. This research was conducted for 10 months, from January to October 2019. Data analysis was carried out in discriptively. The results showed that yellowfin tuna reared in floating net cage can spawn well. Spawning occurs every month. The highest spawning frequency in October is 20 times spawning. While the highest total number of eggs successfully harvested was 11,030,000 eggs in August. Hatching rate between 70.5-92.2%. The survival activity index of newly hatched larvae (SAI) is 2.4-3.7
A preliminary experiment on production of dsRNA by in-vivo and its application to tiger shrimp Penaeus monodon larvae for survival enhancement
Authors: Parenrengi A , Tenriulo A , Lante S , Nawang A , Sulaeman  , Masruri M H 
Published: October 2020

Abstract
RNA interference (RNAi) is one of the most recent tools against shrimp viral infection by gene constructs of dsRNA induction. This study aimed to produce dsRNA by in-vivo method and to analyse the effect of its application to tiger shrimp larvae. The dsRNA production was conducted by cloning of genes encoding VP15 and VP24 of WSSV into L4440 vector containing T7 promoter, then transformed to Escherichia coli and grew in LB media for mass production. The bacteria were in-activated using heat-killed bacteria method by immersion at 80°C for 5, 10, and 15 min. Before WSSV-challenge test, tiger shrimp PL-12 were vaccinated by immersion using in-activated bacteria in concentration of 1.3×108 cell/mL for 30 min as a treatment and without vaccination was as a control. The results showed the successful production of VP-dsRNA by in-vivo. In-activated bacteria was effective at 5 min, since dsRNA did not damage. Survival of larvae at 5 days post challenge (dpc) in VP15-dsRNA was relatively higher (28.3%) compared to control (24.4%), and application of VP24-dsRNA also showed higher survival (86.9%) compared to control (83.1%) at 10 dpc. The result implied that the application of dsRNA exhibited a sign of potential way to produce resistant larvae.