bluuebunny/crossref_metadata_2025_split huggingface dataset:
Study on zooplankton diversity aquatic ecobiology of Batang Toru River, North Sumatera, Indonesia
Authors: Asriansyah A , Wildan D M , Pratiwi N T M , Simanjuntak C P H , Sulistiono  , Hestirianoto T , Shafrudin D , Nugroho T 
Published: May 2021

Abstract
The Batang Toru River is a fairly long river, flowing from the North Tapanuli region and emptying into the Indian Ocean (South Tapanuli Regency). Increased deforestation in the Batang Toru River area has increased the potential for decreasing water quality of the Batang Toru River. The purpose of this study was to determine the condition of the water quality of the Batang Toru River. This research was conducted for 3 months (April, July, October), in the Batang Toru River and its surroundings (14 observation stations scattered from the area near the upstream to the coast). The data analysis used in this research is the analysis of the abundance and composition of the types of phytoplankton, the Diversity Index (H’), the Evennes Index (E), and the Dominance Index (C). Based on the research results, zooplankton in these waters consist of Six Phylum of zooplankton, such as Ciliophora (4 genera), Amoebozoa (2 genera), Cercozoa (1 genera), Rotifera (9 genera), Arthopoda (3 genera), and Annelida (2 genera). Diversity, Evenness, and Dominance Indices were around 0.349-1.847, 0.503-0.994 and 0.240-0.802. Based on the index value, it can be concluded that the Batang Toru River is classified as experiencing moderate ecological pressure.
Review: DNA metabarcoding approach for fisheries management
Authors: Ayu I P , Wardiatno Y , Butet N A , Madduppa H 
Published: May 2021

Abstract
Increased publications on meta-barcoding promote interests in studies associated with fisheries biodiversity, diet, and biomonitoring. These studies primarily concentrated on an ecosystem that has implications for fisheries management with complex interpretation. Various theories have arisen to describe the interactions among aquatic species and eventually contribute to the roles they play in ecology. Identifying organisms is also a prerequisite for answering questions in the field of ecology, which shows that reliable and accurate knowledge is important and desirable. Therefore, as a modern molecular technique, metabarcoding provides a realistic approach that lets ecologists analyze organisms in complex environmental samples and rapidly solve the problem associated with the food web in the coral reef ecosystem. This research explores the use of metabarcoding in fisheries management research and highlights the drawback and value of the future process.
Supporting community-based mangrove forest management as Essential Ecosystem Area in Sungai Pakning, Riau
Authors: Christian Y , Budiman M K , Purwanto W , Damar A 
Published: May 2021

Abstract
Out of fifty established Essential Ecosystem Area up to 2020, six are located on mangrove forest. To support the government target’s achievement of ecological representative protection, at once to enhance the conservation of coastal environment and resources, what has been initiated by Pertamina RU II Sungai Pakning, communities of seven coastal villages on Bukit Batu district, and various actors to rehabilitate and conserve the environment need to be supported through the improvement status as one of wetland type of Essential Ecosystem Area (EEA). Apart from its biological diversity and the carbon stock potentials, this 281.86 hectares of mangrove forest has been developed as an integrated coastal management site which is integrating coastal disaster risk mitigation, protection of mangrove-based biodiversity, wise utilization of wetland through inland aquaculture, education-purpose tourism, the environmental-based communities institutionalization, and as a coastal resources-based alternative livelihood. The result shows that Sungai Pakning Mangrove Forest meets the indication of the essential area from the uniqueness, biodiversity, existing governance, and utilization aspects. The improvement status as Essential Ecosystem Area expectedly also improve the quality of coastal management and promote the wider collaborative management, and encourage sustainable utilization by communities surround mangrove forest.
Algae bloom phenomenon in Jakarta Bay as symptoms of severe eutrophication: Monitoring results of 2014-2016
Authors: Damar A , Prismayanti A D , Rudianto B Y , Ramli A , Kurniawan F 
Published: May 2021

Abstract
Algae bloom is one of the symptoms of eutrophication process in an estuary, causing in some ecological and societal problems for the aquatic environments and human activities. Algae blooms observation was conducted in the dry season period between 2014 to 2016, in an eutrophic embayment of Jakarta Bay, Indonesia. Observations were made by conducting transect-boat survey and plankton sampling once the bloom was observed. Samples of chlorophyll-a and net plankton were taken and measured in the laboratory for phytoplankton biomass analysis, cell counting, and identification of bloom-forming species. In the 3 consecutive years of observation, the most frequent bloom-forming species observed were Skeletonema costatum, Pseudonitzschia Spp., and Noctiluca scintillans, The most frequent location of the blooms observed was in the inner part of the bay, in the area in front of Marunda, Ancol and Angke. Phytoplankton biomass during the bloom events were ranged between 126.3 to 232.3 μg Chl-a L−1, with the highest was in 2015 of during the Skeletonema costatum bloom. Blooms were also observed but in low frequency and low biomass at the middle part of the bay off Marunda coastline area. Cell phytoplankton counting were ranged from 1.139 ϗ 106 cell L−1 to 7.893 ϗ 106 cell L−1. During period of surveys, there was no mass mortality of fishes were detected.
Eutrophication in a tropical estuary: Is it good or bad?
Authors: Damar A , Ervinia A , Kurniawan F , Rudianto B Y 
Published: May 2021

Abstract
Coastal eutrophication is defined as the increase of rate of organic supply into an estuary. In the recent global discussion, eutrophication is seen as a negative situation, in fact, it has positive impacts such as increase in primary production which lead to the increase of fisheries production and hence, community income. This paper promotes a simple diagram called eutrophication-benefit curve which correlates between levels of eutrophication and its benefits to both ecological and economical aspects. In the beginning of eutrophication process, environment gets benefit from the increase of the nutritional state of the water which leads to the increase of primary production and fisheries production. This is obvious in the comparison between northern and southern coast waters of Java Island, showing a higher primary production and phytoplankton biomass and hence fisheries production in the northern coast waters of Java compared to those of the southern coast waters of Java. However, the rapid increase of eutrophication level of the northern coast waters of Java Island causes eutrophication negative effects such as oxygen depletion, algae bloom and disturbance of coral reef ecosystems. This paper shows the optimum level of eutrophication level that can give benefit to both ecological and social environment.
The community structure of intertidal macrozoobenthos on muddy substrate in Lubuk Damar, Aceh Tamiang, Indonesia
Authors: Darmarini A S , Wardiatno Y , Prartono T , Soewardi K , Zainuri M 
Published: May 2021

Abstract
Large intertidal areas with varying texture percentages may influence the composition, presence, and abundance of macrozoobenthos. This study aims to determine the community structure of benthic animals on muddy substrates at various distances, from January until November 2017. This study used the line transect method with the following variations in site: A: 0-100 m, B: 101-200 m, C: 201-300 m, D: 301-400 m and E: 401-500, with 10 replications. 11 phyla were found in the research location, namely Annelida, Platyhelminthes, Nematoda, Pogonophora, Sipuncula, Brachiopoda, Nemertina, Mollusca, Arthropoda, Cnidaria, and Echinodermata. Phylum Sipuncula dominated 93% compared to the 10 other families. The macrozoobenthos density at each sampling distance and time were significantly different. Additionally, the highest abundance was 12,187 ind/m2, while the lowest was 500 ind/m2. The diversity index ranged from 1.1 to 4.4, dominance between 0.1 to 0.7, and evenness between 0.2 - 0.9, respectively. At each observed distance, there were differences in type and number of macrozoobenthos, which was assumed to be caused by the different percentages of texture substrate at each sampling point. Furthermore, texture types with average compositions of 57% sand, 30% silt, and 12% clay had a higher diversity index than the other percentages’ composition.
Pollution source of Cileungsi-Cikeas-Bekasi River
Authors: Effendi H , Prayoga G , Azhar A R , Azhar R 
Published: May 2021

Abstract
Sources of pollutants in the Cileungsi-Cikeas-Bekasi River Basin were inventoried, through data from the district’s Environmental Agency where the three rivers cross. Pollutant sources were also determined based on searches in the form of type, number, and location, using google maps and google earth. The search results are mapped by applying ArcGIS. The aim of the research was to determine land-based source of pollution entering the river. The types and sources of pollutants vary greatly in terms of type, location, and number. In the three river basins, it is known that there were 413 industrial sectors, 538 restaurants, 457 housing complexes, 80 hospitals, 92 hotels, 53 shopping centers, 37 livestock, 147 small and medium sized entities (SMEs), and 59 domestic. The source of pollutants entering the Cikeas River was dominated by housing complexes. The source of pollutants entering the Cileungsi River was dominated by industry. Meanwhile, the sources of pollutants entering Bekasi River were mostly shopping centers, hotels, hospitals, and restaurants.
Pollution Index of Cileungsi-Cikeas-Bekasi River
Authors: Effendi H , Prayoga G , Azhar A R , Permadi T , Santoso E N 
Published: May 2021

Abstract
Water quality data of the Cileungsi-Cikeas-Bekasi River (survey results and monitoring data) were analyzed using the Pollution Index (IP) according to the calculation guidelines listed in the Ministry of Environment Decree No. 115 of 2003 concerning Guidelines for Determining Water Quality Status. The goal was to determine the status of the quality or level of river water pollution. The quality standard used in the calculation refers to the class II quality standard based on the West Java Governor Regulation No. 12 of 2013 concerning Water Quality Standards and Water Pollution Control in Cimanuk River, Cilamaya River, and Bekasi River. The PI value of the Cileungsi River shows that the quality status of the Cileungsi River was in moderate pollution, except in the upstream part (good condition). Status of Cikeas River water quality was still in good condition, except in the downstream segment (light pollution). Based on data from the 2019 survey and monitoring of Environmental Agency (DLH) of Bekasi City in the second semester of 2018, the water quality status of Bekasi River is moderate pollution in all segments.
Effect of heterotrophic bacteria on the growth of tilapia (Oreochromis niloticus) cultivated in brackish water
Authors: Effendi I , Feliatra F , Emrinelson T , Siregar I A , Adelina A 
Published: May 2021

Abstract
Tilapia is a commercial fish cultivated in both fresh water and seawater frequently attacked by pathogenic bacteria. Some bacteria have become probiotics and help overcome this problem. This study aimed to examined the effect of heterotrophic bacteria administration on survival rate and absolute weight growth of the fish, heterotrophic bacterial population growth and the water quality. The study used a factorial experimental design a x b, where a factor was the method of administering heterotrophic bacteria and b factor was the species of isolate used. Factor a consists of an introduction to fish via feed (a1) and via water test media (a2). Factor b consisted of b1 (diet without heterotrophic bacterial treatment), b2 (diet with heterotrophic bacterial isolate J), b3 (diet with heterotrophic bacterial isolate N), b4 (diet with heterotrophic bacterial combined isolates B, C, D, J (Vagococcus fluvialis), H, N; Bacillus cereus). The fishes were reared in a 60 l container. Administering via a feed of heterotrophic bacteria showed no significant effect to survival rate of tilapia. While administering via water showed a significant influence on the survival rate. Both administration methods caused a better absolute growth rate. However, administration of the bacteria did not affect the heterotrophic bacterial populations in the water.
Resources dynamics impact to fishers’ resilience
Authors: Hafsaridewi R , Sulistiono  , Koeshendrajana S , Sutrisno D , Fahrudin A 
Published: May 2021

Abstract
Fishers residing in small islands are heavily dependent on the surrounding resources. The dynamics of these resources influence the fishers’ level of resilience. The purpose of this study is to analyze the correlation between the fishers’ resilience and available resources using a dynamic model. The method used is dynamic system analysis. The research site is located in is Karimunjawa islands, Central Java, Indonesia. The primary data collection was conducted between March-April 2018. The dynamic model consists of ecological and economical subsystems. The findings show that fishers’ resilience experienced a downward trend yearly. Based on the simulation of resources dynamic on the Karimunjawa islands, changes in resource conditions forced fishers to adapt to ongoing changes. The dynamics of marine and fishery resources in the Karimunjawa Islands have forced the fishers to adapt to the changing conditions. The adaptation made is that fishermen change their fishing grounds, especially as they adopted a new technology of GPS and fishfinder. Efforts can be made to improve the fishers’ resilience by increasing their productivity and fishing results. It can be achieved by improving the fishers’ capacity through training programs to improve their fishing skills.
Distribution of Matuta purnama J. C. Y. Lai & Galil, 2007 (Brachyura: Matutidae) outside type locality
Authors: Hanim N , Wardiatno Y , Perwitasari D , Suman A , Parlindungan D , Farajallah A 
Published: May 2021

Abstract

Matuta (Moon Crab) belongs to superfamily of Calappoidae which inhabit the sandy beach area. There are four species of Matuta which can be found in Indonesia, one of them is Matuta Purnama. The latest report, despite Indonesia, has long coastlines, showed that the distribution area of this species is only in Batu Karas Beach, Pangandaran Regency. This study reported the new distribution areas of M. Purnama in Indonesia. The organism samples were collected using the purposive sampling method in 21 sampling sites and preserved in 96% of alcohol solution. The identification process were conducted based on Lai and Galil, 2007. There were four new distribution area of M. Purnama, which are Panjang Beach (west coast of South Sumatra), Bayah Beach, Karanghawu Beach, and Pangandaran Beach (south coast of Java). In other sampling sites, M. purnama have not been found, but the other Matutas pecies, M. victor, and M. planipes were found. This situation might be influenced by many factors, such as season and sea current, etc. This study was expected to be useful for conservation and management.
Ectoparasites of blue swimming crabs (Portunus pelagicus) from Demak and East Lampung, Java Sea Indonesia
Authors: Heirina A , Krisanti M , Butet N A , Wardiatno Y , Köpper S , Hakim A A , Kleinertz S 
Published: May 2021

Abstract
Ectoparasites that infest Portunus pelagicus can have negative impacts on host health. This study aims to determine the infection patterns of ectoparasites of P. pelagicus, such as prevalences, intensities, and (mean) abundances in relation to its pathogenic impacts. A total of 93 crabs were sampled from fishermen in Demak and East Lampung from October 2019 to January 2020. Seven ectoparasite species, Chelonibia testudinaria (Crustacea), Dianajonesia tridens (Crustacea), Octolasmis angulata, O. lowei, O. warwicki (Crustacea), Ostrea puelchana (Mollusca) and Thompsonia sp. (Crustacea) were isolated. In Demak the ectoparasite with the highest prevalence was O. angulata of 81% with an intensity of 315. In East Lampung, C. testudinaria had the highest prevalence of 88% but with low intensity of 62. Both parasite species can have health impacts on their host, such as enhanced vulnerability to predators for C. testudinaria or reduced oxygen uptake for O. angulata. A total of 20,540 specimens of Thompsonia sp. were found within the East Lampung samples. This species can have a negative effect on their host’s reproduction system. In the future, this knowledge will support enhanced sustainable use of this commercially important crab species and will increase our understanding of health impacts of ectoparasites on P. pelagicus.
Application of radiotelemetry in tracking the movement of mahseer fish (Tor spp.) in Batang Toru River, North Sumatera Province Indonesia
Authors: Hestirianoto T , Sulistiono  , Wildan D M , Simanjuntak C P H , Rahardjo M F , Syafruddin D , Nugroho T , Ismanto A J 
Published: May 2021

Abstract
Mahseer fish or tor fish (Tor sp.) are fish that migrate from upstream to downstream or vice versa. Knowing the habitat of Mahseer fish will provide information on how to manage these fish. The purpose of this study was to apply radiotelemetry to determine the migration of Tor fish (Tor sp.). This research was conducted in the Batang Toru River, North Sumatra. This research was conducted by attaching a tracking device to the Mahseer fish (Tor sp.) After which it was observed for 2 months. The results of this study indicate that there is an up and down movement as far as 300 meters from the release location of Mahseer fish. The conclusion of the use of radiotelemetry can be used to determine the area of the cage fish (Tor sp.).
The characteristic of neritic tuna fisheries in the Java Sea and adjacent water
Authors: Hidayat T , Boer M , Kamal M M , Zairion  , Suman A 
Published: May 2021

Abstract
Neritic tuna is an important fishery commodity in the Java Sea, however, the availability of data and information on the fisheries characteristics is still limited. The study was conducted in 2018. Data was collected by researchers with the help of enumerators who monitoring and collecting data from the fishermen. The method used is direct observation at the study site and interviews with fishermen. This study aims to analyze information fishery characteristics in catch, catch per unit effort (CPUE), catch composition, fishing grounds, fishing season. The results show that neritic tuna in Java Sea caught by purse seine, mini purse seine, drift gillnet, and encircling gill net. The annual catch and CPUE of neritic tuna are still fluctuating. This tuna neritic fishery condition was showed that has not been overfishing. Catch composition of purse seine and mini purse seine dominated by small pelagic seine while catch composition drifts gill net and encircling gill net dominated by neritic tuna. The fishing ground around west of Karimun island, while purse seine from west of Bawean, Masalembu and around Matasiri island. Fishing seasons are April to May and October to December.
Macrozoobenthos community structure in the Urban Lake-Situ Cikaret, West Java
Authors: Imroatushshoolikhah  , Sudarso J , Ibrahim A , Hafizha H U , Rohaningsih D , Sari L 
Published: May 2021

Abstract
Situ Cikaret is an urban lake that suffers from anthropogenic activities. The macrozoobenthos community has been used to examine the inland water ecosystem. However, there is finite information about macrozoobenthos in Situ Cikaret urban lake. The research aims to study the macrozoobenthos community structure in Cikaret urban lake. Samples were taken in March and April 2019 in five sites using Ekman Grab and identification was in the Research Center for Limnology LIPI. CAP-6 for ANOVA-Similarity (ANOSIM) is used to analyze the similarity within the community, whereas MVSP 3.22 for Canonical Correspondence Analysis (CCA) to find the relation between macrozoobenthos and the environment. Water quality including temperature, pH, conductivity, total dissolved solids (TDS), oxidation reduction potential (ORP), depth, clarity, turbidity, dissolved oxygen (DO), and total suspended solids (TSS) was measured. Ten groups have been found, namely Chironomidae, Coleoptera, Tubificidae, Naididae, Glossiphoniidae, Viviparidae, Thiariidae, Ampullariidae, Planorbidae, Corbiculidae. The predominant family was Tubificidae (9,525 individual/m2). ANOSIM shows no significant difference in similarity (p>0,05) between locations. A linear correlation shows between diversity index and DO, pH, turbidity, and water temperature. CCA shows the abundance of Tubificidae, Chironomidae, Viviparidae, Ampullaridae, Planorbidae, Corbiculidae has a tendency towards the temperature, pH, ORP, turbidity, DO, TDS, depth.
Diversity, density, and Importance Value Index of mangroves in the Segara Anakan lagoon and its surrounding area, Cilacap Regency, Indonesia
Authors: Ismail  , Sulistiono  , Hariyadi S , Madduppa H 
Published: May 2021

Abstract
Coastal mangrove forest habitats in the Segara Anakan Lagoon have become an important area for estuarine fisheries which should be preserved for sustainability. This study aims to analyze diversity, density, and the importance value index of the mangrove in the area. The method used was a plot and path (combination method). To conduct this study, the nine purposely sampled stations ranged from the western Segara Anakan Lagoon to the eastern mangrove area adjacent to the Donan River. The nine station was grouped into 3 (three areas) namely; Mangrove Eastern Area (river influence), Mangrove Middle Area, Mangrove Western Area (seawater influence. The results show the average mangrove density overall stations were dominated by seedlings with 39881 individuals/ha with fraction 75%, followed by saplings with 12311 individuals/ha (23%), and tree category with 711 individuals/ha (1%). Because of the average mangrove density of tree category less than 1000 trees/ha so, the mangrove forest in the Segara Anakan Lagoon and its surrounding area was categorized to be damaged. Meanwhile, the highest Importance Value Index (IVI) was at 221 for R. apiculata and at 220 for Sonneratia caseolaris for all stations.
Finding of nile tilapia Oreochromis niloticus (Cichliformes: Cichlidae) in Georgia, the South Caucasus
Authors: Kuljanishvili T , Epitashvili G , Japoshvili B , Patoka J , Kalous L 
Published: May 2021

Abstract
Nile tilapia, Oreochromis niloticus (Linnaeus, 1758) is a fish from the family Cichlidae, native to Sub-Saharan Africa. Nile tilapia is one of the most cultured freshwater fish species worldwide and because of its commercial value and well-developed aquaculture technologies, it has been introduced to many countries. Nile tilapia also has become invasive in areas of suitable climate when escaped from aquaculture facilities to the wild. Georgia is the country in the Ponto-Caspian region situated on the southern slopes of the Great Caucasus eastwards from the Black Sea coast. Due to its very variable landscape, the climate of Georgia fluctuates from cold mountainous to humid subtropical type. Here we present the finding of Oreochromis niloticus in freshwaters of eastern Georgia for the first time, with the discussion of risk assessment with the climate suitability for potential establishment.