bluuebunny/crossref_metadata_2025_split huggingface dataset:
Seasonal variation of marine debris at Manado Bay (North Sulawesi, Indonesia)
Authors: Lasut M T , Pane L R , Doda D V D , Kumurur V A , Warouw V , Mamuaja J M 
Published: May 2021

Abstract
Marine debris has become a global concern due to its impact on marine ecosystems. These materials generally come from land and are deposited to marine environment through different agent of carrier. Many efforts are being made to monitor the dynamics of the debris including their presence and their variability in relation to seasons. The latter are assumed from the facts that the presence of the debris is mainly affected by the waves, speed, and direction of ocean currents in the area of interest. In this study, variation of debris in dry and wet season at Manado Bay was assessed by using a shoreline technique. Two locations are selected, Bailang and Malalayang beach. The samplings were conducted in August 2019 (represent dry season) and January 2020 (represent wet season). Several parameters are examined during the sampling; they are: amount of material, type of debris, composition, and spatial density of each type for macro-size (>2.5 cm) and meso-size (0.5–2.5 cm). The results showed that there was variation on composition and density, but the types of debris remain unchanged. Our present study concluded that variation in the season do not affect the variability of marine debris in Manado Bay.
Modern methods of genetic sampling of aquatic organisms
Authors: Marková J , Yonvitner  , Patoka J 
Published: May 2021

Abstract
Genetics is a promptly developing scientific field. As the genetic methods are evolving, so are sampling procedures. Originally, most of the sampling approaches were severely harming for the subjects, but with improving techniques, a small piece of tissue is enough for the analysis. Currently, it is possible to obtain the sample without damaging the subject. A sampling of aquatic organisms, mainly those occurring in lower population densities, can be quite complicated. That complicates the early detection of biological invasions, however, with modern methods this problem could be solved. One of such methods is eDNA which allows us to obtain genetic information without direct contact with the target organisms. It is important to assess the advantages and disadvantages when considering the best method for specific research questions in accordance to specific field conditions.
Biodiversity of macroinvertebrate in artificial substrate from several habitats at Ponelo Island, Gorontalo
Authors: Mashar A , Firdaussyia A P N , Krisanti M , Hakim A A 
Published: May 2021

Abstract
Ponelo Island is located at the North Gorontalo District, Province Gorontalo, with a position close to the Wallace line. The impact of the position makes Ponelo Island having high biodiversity, such as macroinvertebrates. This study aimed to compare the biodiversity of macroinvertebrates living in artificial substrates form anthropogenic, seagrass, mangrove, and coral reefs habitat at Ponelo Island, Gorontalo. This study was conducted from August to October 2019 in four different habitats at Ponelo Island. The specimens were identified at the Laboratory of Micro Biology, Department of Aquatic Resources Management, IPB University. The data were analyzed by calculating the diversity index, evenness index, dominance index, similarity analysis among habitats, and ANOVA test. The macroinvertebrate samples from all stations were found in 58 species, consisting of phylum Annelids, Crustaceans, and Molluscs. The diversity value of macroinvertebrate in seagrass and coral reef habitats is higher and vice versa the association level is lower than in other habitats. Acetes sp., Clypeomorus bifasciata, and Sesarma sp. were obtained in all locations. The placement of the artificial substrate had no significant effect on the density of macroinvertebrates in all habitats.
Assessing Bali sardine stock status using real-time electronic catch landing data recorder and time series catch database
Authors: Natsir M , Anggawangsa R , Wada M 
Published: May 2021

Abstract
Digitalization of capture fisheries data becomes inevitable in the present and future time. The use of Information and Communication Technology (ICT) in the fisheries sector is widely applied, creating a bigger and better database. Development of the database offers the utilization of Big Data and Decision Support System (DSS) to provide robust analysis, simulate better scenarios, formulate recommendations, and propose management measures to support successful fisheries management in achieving sustainability and profitability objectives. Bali Strait sardine stock estimation has been conducted several times through several approaches and techniques. This study will combine the available times series catch and effort data from published statistic landing data and publications with real-time data from electronic catch monitoring in Muncar and Pengambengan fishing port. The sardine stock and fishery status estimation were analyzed using a stock-production model incorporating covariates (ASPIC), a Nonequilibrium surplus-production model to data on fish catch and relative abundance. Another purpose of this study is to increase stakeholder participation through a smart dashboard system that enables automatic data analysis, faster recommendations socialization, and engagement. Increased stakeholder participation in fisheries management will be a crucial factor in achieving operational and successful fisheries management.
Morphometric and growth responses of Enhalus acoroides seedlings under carbon dioxide enrichment: An experimental assessment
Authors: Nugraha A H , Zahra A , Khafsar K , Almahdi S 
Published: May 2021

Abstract
It is predicted that the concentration of carbon dioxide in the ocean will continue to increase. This phenomenon certainly has an impact on the sustainability of the marine ecosystem, including the seagrass ecosystem. This study aims to determine the effect of carbon dioxide on the morphometrics and growth of E. acoroides seedling. This study was an experimental study where the seeds from the fruit were grown in a controlled environment for two months. There are two treatments, first treatment with the addition of carbon dioxide and second treatment without the addition of carbon dioxide. The results of this study indicate that there is significant result from the two treatments given. Seagrass seeds that grow on treatment with carbon dioxide gas generally have shorter morphological characteristics as well as their growth.
Coral reef ecosystems condition prediction after tsunami based on previous reef fish community structure and benthic coverage surveillance on Sumur, Banten
Authors: Prabowo B , Kurniawan F , Bramandito A , Darus R F , Wicaksono R Z , Amin M A Al , Solihin A , Damar A 
Published: May 2021

Abstract
Patterns of community structure within coral reefs ecosystems are strongly influenced by a catastrophe such as a tsunami. Sumur is one of the coastal regions affected the most by the Banten Tsunami in December 2018. This research aims to predict coral reef ecosystem conditions after a tsunami based on the reef fish community structure and benthic coverage in the previous month. The research was conducted on every island around Sumur coastal region. Reef fish specimens were sampled using underwater visual census, and benthic coverage was taken with quadrats for Coral Point Count Estimation (CPCe). Overall coral condition assessed by conservation value determined through coral morphology. The highest coral coverage was found in Sumur, Southwest Oar, and North Badul. Nearly all sites have a high diversity reef fish community, with the highest abundance and species richness found in West Umang and North Badul. Badul island, Mangir island, and Cigorondong were categorized as the locations with coral reef ecosystems with the highest stress-tolerators. Most areas with this high stress-tolerator are predominated by coral massive and sub-massive and have higher endurance than other sites. Post-catastrophe, reef fishes will shift to the sites where most coral reef-building has survived, especially reef fishes with territorial behaviour.
Heavy metal (Pb, Hg, Cu) contamination level in sediment and water in Segara Anakan Lagoon, Cilacap, Indonesia
Authors: Prayoga G , Hariyadi S , Sulistiono  , Effendi H 
Published: May 2021

Abstract
Segara Anakan lagoon in Indonesia receives a variety of contaminants from numerous and various human activities. One of these was heavy metals, which were dangerous pollutants and will accumulate in the environment. This study aimed to determine the heavy metals content in sediment and water in the Segara Anakan lagoon. Those data were then scrutinized, whether they were toxic to the aquatic biota. Sampling was conducted at six observation stations every month. The heavy metals content was compared to the quality standard (set out by CCME and ANZECC & ARMCANZ for sediment, and the Decree of the Minister of Environment Number 51 of 2004 for water). The heavy metals in sediments were below the minimum limit (Pb (30.2; 50.0), Hg (0.13; 0.15), Cu (18.7; 65.0), all in mg.kg−1 units), except Cu showing higher value than quality standard at one observation. Other results, Pb and Cu in water, showed exceeding the quality standard (both were 0.008 mg/l). However, it was still within safe limits for most types of aquatic biotas. Overall, the three types of heavy metals in sediment were safe for aquatic biotas, while in water, only Hg can be clearly stated that it was safe.
Length based spawning potential ratio of indian scad (Decapterus russeli, Rupell, 1928) in the South China Sea
Authors: Priatna A , Boer M , Kurnia R , Yonvitner  
Published: May 2021

Abstract
Spawning Potential Ratio (SPR) could be used to investigate stock indicators in terms of data-limited fisheries assessment. This study was aimed to assess the Length-based SPR of Indian scad (Decapterus russelli) in South China Sea. The length-frequency data were collected from 2015 to 2019, with approximately 250 fish sampled monthly. Fish samples were obtained from the catch of purse seiner which landed at Pemangkat fishing port. LB-SPR model required length-frequency and life history parameters i.e growth and maturity. The parameters L∞ K, M, L50, and L95 were 23.92 cm, 0.60 year-1, 1.00, 15.80, and 22.00 respectively. The estimated LB-SPR from static life-history parameters was 41%, while the stochastic SPR about 22% with a wide confidence interval, due to uncertainty of L∞ and K. According to the LB-SPR model considering the uncertainty, the estimated stochastic SPR is more acceptable in the condition of poor data. Besides, the high fishing pressure (F/M>1) indicated that SPR was lower than the target reference point (40%). However, in terms of the length at first capture (SL50) was greater than a length at first maturity (L50), it should be a consideration to estimate the SPR. Therefore, SPR was determined by 20%-40% or stock status on fully-exploited.
Coastal resources degradation in Tangerang, Banten Province: State and management action
Authors: Prismayanti A D , Mulyana D , AlAmin M A , Kurniawan F , Damar A , Budiman M A K , Gunawan B , Mahardika S M H 
Published: May 2021

Abstract
Coastal degradation can be determined as mangrove destruction and water quality degradation. Erosion and accretion are the impacts of mangrove destruction in coastal areas. Ecosystem condition and coastal environment destruction were analyzed in Tangerang coastal areas. Soil, mangrove vegetation, and water quality analysis were carried out in this study. Soil quality was analyzed descriptively. Mangrove vegetation and water quality were analyzed with the Important Value Index and STORET Index, respectively. The results indicated that the coastal of Tangerang is damaged both in terms of mangrove and water quality. The causal analysis showed that the damage to the coastal environment in Tangerang is largely influenced by the high amount of plastic, domestic, and industrial waste. Management recommendations that can be carried out on the coast of Tangerang are silvofishery management and mangrove planting right behind the wave breaker.
Management strategy of freshwater eels (Anguilla spp.) based on socio-economic influence in Cimandiri River
Authors: Putra M D , Effendi H , Kamal M M , Taryono  
Published: May 2021

Abstract
Cimandiri River is highly potential for freshwater eel resources in Sukabumi Regency. The high exploitation rate on this eel combined with anthropogenic impacts cause a considerable threat to the sustainability of eel fisheries in the river. This study aims to analyze the socio-economic impact of the freshwater eel fisheries and its implementation in managing this fishery in Cimandiri River. Research data was based on in depth interview conducted in July 2020 and largely supported by secondary data for determine environmental quality. Data analysis was performed using scoring and swot methods. The results that environmental quality in the river remains in good quality for the growth of eels. Freshwater eel fishing is based on several motives, including being the main catch of fishermen, supporting the economy of the community around the river, and as a hobby for fishermen upstream. Eel main fishermen only depend on the economic chain of eel fishery resources, so that skills training is needed to increase their capacity. Stakeholders have the strength and opportunity in making policies and developing human resources for support the sustainability of eel fisheries in the Cimandiri River.
Feeding habit of Strombus canarium in Tanjung Sebauk Bintan Island, Indonesia
Authors: Putra R D , Saputra R , Karlina I , Nugraha A H , Idris F , Suhana M P , Febrianto T , Anggraeni R , Putra I P , Koenawan C J 
Published: May 2021

Abstract
Several species of marine gastropod mollusk used by the community as economical food commodities, including the Strombus canarium was found in the Tanjung Sebauk, Bintan Island. The S. canarium diet as a deposit feeder significantly affects the consumption of the biota food varieties. Until now, there was limited information related to the classification of food consumed by S. canarium. Environmental factors affect S. canarium habitat substantially by providing a food source that is absorbed and influences the growth of S. canarium. Resettlement and restaurant activities in coastal areas affect changes in environmental conditions and modify the habitat and food variations of the organism. The Swept Area Sampling (SAS) method was applied to sweep and collecting S. canarium at a bed-ground area of 1500 m2 in Tanjung Sebauk. The shell splitting and surgery completion of S. canarium were handled in the laboratory. S. canarium samples were immersed with 10% formalin to serve and protect the gastric sample and prevent it from rupturing, including providing the possibility to observe the various food components from S. canarium. Each species of organism found in an S. canarium stomach sample was photographed and counted and measured three times. Photographs of the gastric sample obtained from observations in a microscope were analyzed and identified comprehensively to find the composition of food varieties from the S. canarium. The varieties of food composition obtained were distinguished by class and group of biota and analyzed using the Preponderance Index. The varieties of food composition in gastric samples from S. Canarium shown eight species with the majority composition from plankton groups (phytoplankton and zooplankton), and one species was the copepod class. The following species of biota found in the stomach S. canarium based on the Preponderance Index consisted of Thalassionema sp. (42.59%) as primary food, followed by Nocticula sp. and Coscinodiscus sp. as additional food with a percentage of 37.45% and 12.35%, respectively. In comparison, the variety of complementary food from S. canarium consisted of Entomoneis sp. (2.47%), Cymbella sp. (1.23%), Cochlodinium sp. (1.23%), Calanus sp. (1.85%), and Boreadinium sp. (0.82%).
Genetic variation of COI gene of Hippa admirabilis in Northern Sulawesi
Authors: Putri V W , Fahri F , Wardiatno Y , Farajallah A 
Published: May 2021

Abstract
Hippoid crab is crustacean species which inhabits sandy beach in tropical and subtropical area. One of them is Hippa admirabilis. Previously, this species was reported only in Sulawesi Island in Indonesia beside Taiwan and New Guinea. The aim of this study was to elucidate the genetic variation of Hippa admirabilis in Northern Sulawesi. Ten specimens were collected from two locations in the northern part of Sulawesi in 2016 which is Ogotumubu (Province of Central Sulawesi) and Gorontalo (Province of Gorontalo). The length of the amplified CO1 gene fragment is 596 bp. The obtained sequences are compared to our previous work in Genbank which is Hippa admirabilis from Banggai, Sulawesi. The phylogenetic tree was constructed to phylogeographic scenario based on Neighbor-Joining methods with Kimura 2-parameters models. The haplotype analysis was performed using DnaSP software. The phylogenetic tree shows that all of the H. admirabilis samples assembled into one clade. Five haplotypes of Hippa admirabilis was discovered in this study. There is one shared haplotype group with ten individuals from Gorontalo and Ogotumubu. The rest haplotype is exclusive belongs to each location. The nucleotide variation between Gorontalo, Ogotumubu, and Banggai (as reference sequence) was 8 nucleotide bases.
Growth, mortality, recruitment pattern, and exploitation rate of shared stock flying fish (Exocoetidae) at border area of Indonesia and Timor Leste in Ombai Strait
Authors: Rehatta B M , Kamal M M , Boer M , Fahrudin A , Zairion  , Ninef J S R 
Published: May 2021

Abstract
Flying fish (Exocoetidae) is one important small pelagic fisheries commodity in border areas of Indonesia and Timor Leste. However, the data of population parameters in Ombai Strait are not yet known, which is important to inform unit stock management and sustainable fisheries. This study aimed to provide information about growth and mortality parameters, recruitment pattern, and exploitation rate of flying fish. Data collection was carried out during May 2018-June 2019 by measuring and observing the flying fish landed at the fish landing sites in Belu Indonesia and Bobonaro Timor Leste. Data analysis used the FAO-ICLARM Stock Assessment Tools (FiSAT) program. The results showed that the asymptotic length (L∞) was 330.5 mm, growth constant (K) was 0.99 per year, and growth performance indices (Φ) was 0.50. The natural mortality (M) was 0.92 per year, fishing mortality (F) was 0.12 per year, and total mortality (Z) was 1.04 per year. The highest recruitment occurs in May to September with peak season in June (14.82%) and September (15.16%). Exploitation rate (E) flying fish in the border area of Indonesia and Timor Leste in Ombai Strait is relatively low about 0.11 and still at a rational and sustainable utilization range (E < 0.5).
Abundance and distribution of microplastics in Baturusa watershed of Bangka Belitung Islands Province
Authors: Riskiana R , Hariyadi S , Effendi H 
Published: May 2021

Abstract
Microplastics has been found in the most water bodies since 1970s, yet its presence and understanding about the existence on the freshwater body, as well as a control upon its abundance is still very limited. Whereas the river became a very potential channel for microplastics in contaminating the environment. Microplastics is term refer to plastic particles which diameter less than 5 mm. Microplastics could act as an absorbent of chemicals from the environment, and also a carrier of additive chemicals added during the process of plastic manufacturing to the organisms. It can potentially affect the organisms through the aquatic food web. This study aims to figure out the abundance and distribution of microplastics in Baturusa watershed. The research was carried out from November 2019 to August 2020. Samples were collected using plankton net of 30μm mesh size, from seven sites represent upstream, downstream, and tributaries, then analyzed using an ocular microscope. The microplastics particles type found are sheets, films, fibers, and fragments. The average microplastics abundance was 2209–5569 particles m−3, the highest abundance was found in Rangkui River estuary about 5647 particles m−3, and the lowest was in Selindung River. This reveals that the more abundance of microplastics in the waters was correlated to the more human activities surroundings.
Nanoparticles green synthesis macroalgae-based and its application and distribution in Indonesia – An overview
Authors: Safaat M , Tursiloadi S , Perisha B , Zulpikar F 
Published: May 2021

AbstractNanoparticles have received much recent attention in areas such as chemistry, physics, materials science, life sciences and engineering. Many physical and chemical methods have disadvantages such as high costs, the use of chemicals that are harmful to the environment and health. The green nanoparticle synthesis approach, using plant extracts as a capping agent of nanoparticles, is the right solution to produce nanoparticles that are effective and environmentally friendly. Micro and macroalgae in the use of nanoparticle synthesis are increasingly being developed. However, the use of Sargassum in chemical applications has not been fully explained, and there are still some drawbacks that must be overcome. Sargassum spp. biomass has been recognized as a natural, renewable, and cost-effective material to become a capping agent for nanoparticles. This review is a summary highlighting the potential of metal-Sargassum composite based materials as an alternative to biological protective activities, such as antibacterials. Synthesis and characterization of materials, key factors influencing material performance, and distribution of Sargassum in Indonesia are considered by the Government of Indonesia and investors in seeing opportunities to use Sargassum as an advanced material.
Biodiversity and community of phytoplankton in the mahseer conservation area at Bungo and Kerinci Regencies, Jambi Province, Indonesia
Authors: Safitri F R , Sulistiono  , Hariyadi S , Asmadi  
Published: May 2021

Abstract
Mahseer (Tor spp.) conservation programs require information related to habitat characteristics including phytoplankton biodiversity and community structure as biological characteristics. This study aimed to evaluate phytoplankton diversity and community structure in the mahseer habitat, namely reservation and protection area in Muara Bungo and Kerinci Districts of Jambi Province. This study was conducted four times samplings i.e. December 2018, April 2019, July 2019, and October 2019, at three sites of the protected area, namely in Lubuk Alai, Senamat River, and the protected area of Tarutung Village. Furthermore, the data at the three sites were compared with data outside the protected area. Biological indices of the phytoplankton were calculated. The results showed that the mahseer habitat had a high diversity of phytoplankton. The results showed that the mahseer habitat had 8 genera of phytoplankton diversity, dominated by the Bacillariophyceae class, especially Synedra sp. with a dominance rate of more than 60% at each station. The diversity index ranged from 0.95 to 1.18, the evenness index ranged from 0.40 to 0.82, and the dominance index ranged from 0.39–0.43 in protected areas.