bluuebunny/crossref_metadata_2025_split huggingface dataset:
Population dynamics of mantis shrimp (Gonodactylus chiragra Fabricius, 1781) in Batukalasi waters, South Sulawesi, Indonesia
Authors: Warahma Mawaddatan , Nadiarti N , Umar Moh. Tauhid , Nafie Yayu A. La , Priosambodo Dody , Suwarni  , Parawansa Basse Siang 
Published: May 2021

Abstract
The purpose of this research was to determine several population dynamics parameters of a mantis shrimp (Gonodactylus chiragra) population including growth, mortality, exploitation rate, and relative yield per recruit. Mantis shrimp were sampled from the waters around Batukalasi, South Sulawesi Indonesia from 16th June to 21st July 2019. Each specimen was measured, weighed and the sex determined. Growth parameters were estimated using the Von Bertalanffy equation. Natural mortality (M) was estimated using Pauly’s empirical equation. Total mortality (Z) was estimated using the Beverton and Holt equations. Fishing mortality was calculated from the equation Z = F + M. The exploitation level and relative yield per recruit were estimated using the Beverton and Holt equations. These analyses were conducted in the FAO-ICLARM Fish Stock Assessment Tools II (FISAT II) program. The 707 mantis shrimp samples were collected comprised of 245 females and 462 males. The growth rate coefficient was higher in male than female mantis shrimps, while male mantis shrimps reached their asymptotic length faster than females. For both male and female mantis shrimps, the estimated natural mortality was higher than fishing mortality, indicating the stock is not over-exploited. The relative yield per recruit was below the optimum value for both female and male mantis shrimp (0.035 and 0.046, respectively).
Use of bioassay CG (Colour Graduation) to determine density of Skeletonema sp. at hatchery
Authors: Badraeni  , Trijuno Dody Dharmawan , Eriswandi Irvan 
Published: May 2021

Abstract
The natural food that is often used in hatcheries is Skeletonema sp. Phytoplankton provision of Skeletonema sp. on fish larvae or seeds carried out in hatcheries tend to be based on estimates and experiences while in the field. This study aims to obtain indicators that can be used in estimating the range of cell density of Skeletonema sp. just by looking at the Bioassay CG (Colour Graduation) kit. This research was conducted at the CV. Puncak Sinunggal, Barru Regency. In this study, researchers use a black CG Bioassay prototype in the form of a box equipped with LED lights, batteries, a colour indicator paper kit, 150 mL glass beaker, and a power button. Samples were observed in the exponential phase or 24 hours after the inoculation was diluted by adding culture media to obtain several different colour gradations. The dilution carried out is mixing between samples with culture media with each ratio, beaker glass (BG)1 (10: 0); BG 2 (9: 1); BG 3 (8: 2); BG 4 (7: 3); BG 5 (6: 4); BG 6 (5: 5); BG 7 (4: 6); BG 8 (3: 7); BG 9 (2: 8) and BG 10 (1: 9). Each treatment was carried out three replications and assisted by 9 panelists. The results showed 10 different colour Skeletonema sp. cell density increases with colour change, where the lowest range is in the S10 colour with density 38-75×104 cells.mL-1 and the highest in S1 colour with a density of 612-740×104 cells.mL-1.
Vulnerability analysis of pelagic and demersal fisheries in the Indian Ocean, Fisheries Management Area 572, Indonesia
Authors: Wardani Firdha Iresta , Nadiarti N , Nelwan Alfa FP , Jamal Muhammad 
Published: May 2021

Abstract
Indonesian Fisheries Management Area (FMA) 572 situated in the Indian Ocean, includes the coastal waters of Bengkulu City, has great potential in terms of pelagic and demersal fisheries. However, the exploitation of these fisheries resources has been intensified due to the growing demand for human consumption. Unfortunately, information related to the susceptibility and productivity of fisheries resources in this area is still negligible. The purpose of this study was to determine the level of vulnerability to potential fishery impacts of several pelagic and demersal fisheries in FMA 572. The study was conducted in Bengkulu City from July to December 2019. Analysis of the productivity and susceptibility level of the fisheries used several productivity and susceptibility parameters through the Productivity and Susceptibility Analysis (PSA) method. The results of the study revealed that the vulnerability level of yellow stripe scad (Selaroides leptolepis) was higher than that of other target fishes. However, in general, the vulnerability of pelagic and demersal fisheries to potential overfishing in FMA 572 was still low.
Catch comparison of sweeping trammel nets (ciker net) with different towing paths
Authors: Wassahua Z , Martasuganda S , Baskoro M S , Sondita M F A 
Published: May 2021

Abstract
The sweeping trammel net (ciker net) is operated by lowering the net in a straight line and then pulling the last end of the net with a ship moving in a full circle where the other end functions as a circular axis (M1 method). An alternative way is for the net to be lowered and then towed by the fishing vessel along two opposing semicircular paths (M2 method). The success of fishermen using this net is determined by the swept area. Therefore, the catch for each net section can vary when using the M1 method but is relatively similar in the M2 method. This study compared the catch per net section from the same sweep axis operated with different towing line paths. The experimental fishing was carried out using 1 ciker net unit consisting of 6 pieces. The catch produced by the two operating methods was significantly different as indicated by t = -3.7852, df = 5, α = 0.05, and p-value = 0.01282. The average catch per section (n = 3) was 21 individuals for M1 operation and 47 individuals for M2 operation. The M1 method produced less catch than the M2 method.
Relationship between purse seine dimensions and catch volume in Sikka Regency, Indonesia
Authors: Najamuddin  , Musbir  , Pale Christofel Oktavianus Nobel 
Published: May 2021

Abstract
The purse seine is a very productive fishing gear for small pelagic fishes. For purse seines that are actively operated during the day-time, the dimensions of the purse seine are expected to be closely related to the number of fish caught. Field conditions indicate that fishermen use purse seines of varying dimensions. In this context, research is needed. This study aimed to analyze the relationship between purse seine dimensions and the volume of fish caught. This research was conducted in the waters of Sikka Regency, East Nusa Tenggara Province, Indonesia from November to December 2019. The parameters observed included purse seine dimensions, vessel speed and the volume of fish captured per trip. The results showed that purse seine dimensions had a very weak positive correlation (r = 0.088) with catch volume. This shows that the relationship between purse seine dimensions and the volume of fish caught is very weak. Most likely the differences in catch volume were caused by other factors. This is in contrast with other studies showing a significant relationship between the dimensions of the purse seine and the volume of fish caught. In the research location the fishing ground was heavily used, so that the fishing vessels were operating relatively close to one another. This may have created conditions where the net dimensions played a lesser role in increasing the volume of fish caught. In order to avoid one purse seiner being affected by the activities of another purse seiner, it would be necessary to expand the fishing ground or reduce the number of purse seiners operating in that particular fishing ground.
Assessment of Lobster Fisheries and Sustainable Management Strategies: A Case Study of EAFM in Central Lombok – Indonesia
Authors: Hilyana Sitti , Buhari Nurliah , Gigentika Soraya , Amir Sadikin , Waspodo Saptono , Himawan Mahardika R. , Jefri Edwin 
Published: May 2021

Abstract
The exploitation of lobster resources in the waters of the Central Lombok Regency, Indonesia is not effectively managed, causing problems in terms of resource availability and sustainability of lobster fishing operations. This study aimed to assess the status of lobster fisheries management and policy strategies for sustainable lobster fisheries management. Data were collected in three lobster fishing centres: Teluk Awang, Teluk Bumbang and Teluk Gerupuk. Methods used were a structured interview technique with questionnaires, focus group discussions (FGDs) and public consultation. The status of the lobster fishery was analysed using the Ecosystem Approach to Fisheries Management (EAFM) indicators with six Domains. The lobster fishery management status was classified as “moderate” (aggregate score 50/100). The Fisheries Resources Domain scored 35, indicating that lobster stocks are in “poor” condition. Four dimensions had a “moderate” status: the Fisheries Technology Dimension (43), the Economic Dimension (48), the Social Dimension (53), and the institutional dimension (55). The Habitat and Ecosystem Dimensions was classified as “good” (67). Sustainable lobster fisheries management strategies include regulating fishing quotas, banning gears which catch lobster seed, and optimizing the use of selective fishing gear; establishing a working group for lobster management; managing water quality and zonation of lobster habitat; transfer of lobster farming techniques; and empowering community coastwatch groups.
Study on microbiological quality of marlin fish balls from several markets in Tanggamus, Lampung
Authors: Ratrinia Putri Wening , Hasibuan Nirmala Efri , Zein Devy Sari Aprilia 
Published: May 2021

Abstract
The fisheries processing industry in Tanggamus, Lampung, Indonesia is one of the sectors with potential for development. Fishery processing businesses, particularly small and medium enterprises (SMEs) producing marlin fish balls are still commonly found in Tanggamus District; however marlin fish ball producers still do not pay attention to the microbiological quality of the products. This study aimed to obtain data on total plate count (TPC), coliform and Salmonella bacteria in marlin fish balls in several Tanggamus District markets. This study used a simple random sampling method in three markets: Kota Agung Timur market, Madang market, and Wonosobo market. The fish ball samples were tested for TPC, coliform bacteria, and Salmonella. Fish balls from the Madang market had the highest TPC (8.64 ×105 CFU/g), and those from Wonosobo market the lowest (1.05 ×105 CFU/g). In addition, for fish ball samples from Kota Agung Timur market and Wonosobo market the coliform test results were <1100 APM/g. Salmonella tests on fish balls from the three markets were negative. Based on the results of this study, it was concluded that the microbiological quality of the marlin fish balls sold in the three markets did not meet SNI standards, presumably because they did not implement a good sanitation system during the production, distribution and sales processes.
Transmission of Desulfovibrio salexigens DSM2638 bacteria in Pachyseris involuta-infection rate and changes in coral morphology at different temperatures
Authors: Rahmi  , Jompa Jamaluddin , Tahir Akbar 
Published: May 2021

Abstract

Desulfovibrio salexigens is one of the bacteria that infect corals with black band disease (BBD). These bacteria develop fast and cause damage to corals. Therefore, there is a monitor disease transmissinon, especially BBD, in healthy corals to determine the extent to which pathogens can infect coral tissue and the impact of these bacteria on infected coral populations. This study was conducted at the Marine Station Laboratory on Barrang Lompo Island, South Sulawesi, Indonesia. Bacteria were cultured in the Laboratory of Microbiology, Faculty of Medicine, Hasanuddin University. Corals were acclimatised in controlled containers, followed by transmission tests using aquaria (24 units, 45cm×30 cm ×30 cm) filled with 15 litres of sterile seawater. A multifactorial approach was used with treatments comprising different incubation temperature (29°C and 31°C) and different bacterial concentration in the maintenance media (102, 104, and 106 UNIT), as well as the interaction between the effects of temperature and bacterial concentration. Trial parameters were observed every day at intervals of 5 hours. Changes in the appearance diameter of corals infected with pathogenic bacteria were analysed descriptively using underwater photography (Nikon Collfix P7100 camera) and the corals were measured with callipers (precision 0.1 mm). The study concluded that the infection rate of the bacterium D. salexigens strain DSM 2638 in Pachyseris involuta was higher at 31°C-29°C. There was no interaction between the effects of temperature and bacterial concentration on the infection rate of infected coral fragments. Bacterial attack was more severe on Pachyseris involuta fragments maintained at 31°C than at 29°C.
Occurrence of microplastic particles in Milkfish (Chanos chanos) from brackishwater ponds in Bonto Manai Village, Pangkep Regency, South Sulawesi, Indonesia
Authors: Amelinda C , Werorilangi S , Burhanuddin A I , Tahir A 
Published: May 2021

Abstract
Pangkep Regency in South Sulawesi, Indonesia, is a milkfish producing region from which milkfish are distributed to fish markets or other regions. The location of the brackishwater ponds which are close to the sea and human settlements could allow microplastics as suspended particles to enter the milkfish gut. This study aimed to observe the number, shape, and color of microplastics in the guts of milkfish (Chanos chanos) from ponds in Bonto Manai Village, Pangkep Regency, and to analyze the relationship between the microplastics found and the hepatosomatic index (HSI). Milkfish samples were collected randomly from one brackishwater pond. Visual identification of the microplastics present in milkfish guts was carried out under a stereomicroscope. The results show that 46 out of 50 (92%) of milkfish sampled had microplastics in their digestive tracts. The average number of microplastics in Chanos chanos milkfish guts was 3.5 items/fish. The microplastic shape was dominated by line (92%) and blue (40%) was the most prevalent color. There was no correlation between the mean number of microplastics in milkfish guts and the mean hepatosomatic index (HSI); however, increasing value of HSI with the increase in number of microplastics found in the gut might indicate a reduction in the health condition of the fish.
Abundance and spatial distribution of marine debris on the beach of Takalar Regency, South Sulawesi
Authors: Faizal A. , Werorilangi S , Samad W , Lanuru M , Dalimunte W S , Yahya A 
Published: May 2021

Abstract
This study aimed to map the spatial distribution of marine debris abundance in the beach area of Takalar Regency, South Sulawesi Province, Indonesia. This research was conducted during the east monsoon in August-September 2019 and July-August 2020. The data were collected from the beach of Takalar at 2 stations; station 1 in Punaga River Estuary and station 2 in Laikang Bay, with 3 replications per station. Sampling was carried out using the transect method, the length of the transect line is 100 meters parallel to the coastline. Samples were collected within the criteria of macro size (> 2.5 cm - 1 m) and meso size (> 5 mm - 2.5 cm). The results showed that the average total abundance of marine debris in the macro size category was 0.036 items/m2 and in the meso size was 0.0012 items/m2; while the average weight abundance of macro and meso marine debris respectively were 0.36 g/m2 and 0.0013 g/m2. The spatial distribution showed that the greatest abundance of macro and meso waste was found at station 2 or around Laikang Bay. The semi-enclosed water in Laikang Bay is linked to the high accumulation of debris in the location.
Microplastic concentration in column seawater compartment in Burau, Luwu Regency, South Sulawesi, Indonesia
Authors: Kama Nur Asmi , Rahim Sri Wahyuni , Yaqin Khusnul 
Published: May 2021

Abstract
Microplastics are very persistent particle and found to float in the waters due to it’s low density. Anthropogenic activities greatly affect the presence and contamination of microplastics in waters, including Burau Seawater, Luwu Timur Regency, South Sulawesi. This study aims to analyze the composition and concentration of microplastics in the water column of Burau Sea, Luwu Regency, South Sulawesi. The station was determined based on the purposive sampling method. Sampling was performed by using a neuston net. There were four stations for collecting microplastic samples. Laboratory analysis was carried out by mixing the sample with 30% H2O2 and left at room temperature for 24 hours. Sample water was filtered by membranouse filter paper. Identification of microplastics using a stereo microscope with a 40× magnification. The results showed there were 810 items of microplastics in the form of fragments, films, fibers and granules with the dominant form of microplastics is fragment. The microplastic colors found were transparent, blue, red, white, green, brown and black with the dominant color being transparent. The microplastic sizes found ranged from 0.01 to 5 mm. The most common sizes are 0.1-1 mm. The average concentration of microplastics was 56.2 items/m3. There is no significant difference in the concentration of microplastics between stations (P value >0.05), which means the distribution of microplastics in the water column at Burau Sea is evenly distributed.
Marine ecotourism development in South Sulawesi, Indonesia
Authors: Tuwo A , Yunus M , Aprianto R , Tresnati J 
Published: May 2021

Abstract
Ecotourism is a fast growing tourism industry. Ecotourism is superior to other tourism because it can give economic benefits and preserve natural resources. The potential of Indonesian ecotourism, especially South Sulawesi has not been optimally utilized; therefore it is necessary to study its development potential. This study aims to analyze the potential and problems in marine ecotourism development in South Sulawesi. The study was done at Selayar Regency, Takalar Regency, Makassar City, and Pangkep Regency. The area of mangrove, coral reefs and sea grass ecosystem was estimated by using Landsat 7 Image and ArcView program. Other data were collected by using survey, census, interviews, and questionnaire. The parameters observed were coastal ecosystem resources; socio-economic; infrastructure; policy; and micro, small, medium business and co-operative. SWOT analysis was used to analyze the strategic condition; and Analysis Hierarchy Process was used to analyze the interaction between the priorities level. The study revealed that marine ecotourism development problems were low capacity resources management, low local community participation, limited infrastructure availability, weak capacity of local community institutions, and insufficient local community support or contribution. Marine ecotourism development in South Sulawesi should be focused on tools improvement of sustainable use, infrastructure development, socioeconomic strengthening, and consistent policy implementation.
Partial Replacement of Saccharum officinarum Bagasse Ash with Cement in Normal Concrete
Authors: Dhivya S , Manikandan P , Kavitha R , Krishnakumar K 
Published: May 2021

Abstract
This report represents a detailed works on utilization of refined Saccharum officinarum bagasse ash (SOBA) as partially mixed with the cement content for the preparation of normal concrete. This experiment reveals SOBA result on cement replacement material (CRM). The CRM properties of SOBA were used because of its chemical properties, fine grained and availability. Usages of bagasse ash act as a good additive under continuous production of SOBA. Around 1700 Mt of Saccharum officinarum is produced, which gives roughly 30 – 35% bagasse in sugar companies. This experimental works enhances the content of SOBA was utilized from 10%-30% in cement partially. The concrete properties such as workability, compressive strength and splitting tensile strength of concrete using SOBA is done. This shows, replacement of SOBA (6 – 60% content) inhibit the value of fresh concrete in slump test. The compressive strength and splitting tensile strength of 6% SOBA shows a good increase in their comparison with 100% cement concrete mixture.
Mechanical properties of concrete as partial replacement of coarse aggregate by e-waste
Authors: Bharani S , Gulshantaj M N A , Rameshkumar G , Senthilnathan V B 
Published: May 2021

Abstract
At present the demand of coarse mixture is accumulated day by day within the world. Eighty-five to ninetieth of electronic waste is disposed on landfills might drop in setting and affects human health conditions. For the recovery of terribly serious issue within the world to beat this speedy rising drawback is being questioned. The E plastic waste is growing day by day in the IT Industries because it could be a important resource. The service of Electronic waste plastic could be a solution to ecological and biological issues. Because the use of Electronic waste plastic in concrete will reduce the waste and provides a decent strength for the structures and roads. it’ll reduces the lowland value for energy saving. A close experimental study had been administered to study the mechanical properties of typical concrete, by casting the specimen with various percentage of E-waste like 0%, 10%, 15%, 20% and different strength characteristics are conducted in lab.
A Study of Partial Replacement for Cement by Bagasse ASH and Coarse Aggregate
Authors: Kavinkumar V , Priya A K , Saravanakumar R , Venkatraman S 
Published: May 2021

Abstract
The Initiatives are emerging universally to regulate, standardize and improve the quality of by products, remnant and scrap in direction to prevent our atmosphere from pollution. The quality standard clarification for reprocessing the agriculture residue formed after processing the commercial need, the residuals are burned in measured atmosphere. The ashes are further used for additional means. While bagasse are burned in co-generation setup below the measured terms, the sensitive amorphous silica are made because of burning progression.
Comparative Study on Axial Compressive Behaviour of CFST and Externally Wrapped CFRP Columns
Authors: Venkat Raman S , Elavarasan S , Elango K S , Saravanakumar R , Vivek D , Rajeshkumar V , Gokulakrishnan R 
Published: May 2021

Abstract
Concrete column fails by crushing or bucking due to axial load in order to resist failure of confinement, concrete filled steel tubular column (CFST) and carbon fibre reinforced polymer (CFRP) wrapping are used. CFST member has its consecutive progression in the construction industries due to its high load carrying capacity upgraded ductile performance, need for form work is minimized and has greater confinement effect. CFRP wrapping provides resistance towards corrosion, light weight exceptional durability, increases strength over confinement. In this work, an experimental investigation between stunt and slender concrete filled steel tubular column is compared with conventional pcc strut and slender column externally wrapped by single and double layer of CFRP. Total of 8 specimen were tested under axial compression. The parameter varied is height (750mm, 1050mm). The diameter of the column is 75mm. M30 grade concrete is cast. End support condition is hinged. For short column slenderness ratio is 40, L/D is assumed to be 10 and for slender column slenderness ratio is 60 and L/D is assumed to be 14. From this study, the influence of slenderness ratio over an effect of confinement is observed. Maximum axial compressive strength of the column is recorded and it is compared with eurocode4, AS/ACI code, IS516:1959 code. The behaviour of column both experimental and analytical results is observed.