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Isolation and Identification of Potential Pathogenic Bacteria in Living Carp (Cyprinus carpio Linnaeus, 1758) Sold in Supermarkets in Cimahi City, Java

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Geraldine A. R., Rosidah R., Herawati H., Bioshina I. B.
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EN
This research was conducted with the aim to analyze the presence of potential pathogenic bacteria in carp that are sold live in supermarkets in the city of Cimahi and to find out the species of these bacteria. Fish samples were obtained from two supermarkets in Cimahi City, Transmart and Superindo. From each supermarket three fish samples were taken once a week and repeated three times. Bacteria were isolated from several parts of the fish body namely body surface mucus, gills, liver, and kidneys. The results of isolation from each target organ were biochemically tested to determine the species of bacteria. Potential pathogenic bacteria found in carp from this research are Aeromonas hydrophila, Aeromonas sobria, Aeromonas schubertii, Aeromonas media, Aeromonas caviae, Aeromonas ecrenophila, Pseudomonas stutzeri, Pseudomonas pseudoalcaligenes, Pseudomonas aeruginosa, Aeromonas caviae, Aeromonas ecrenophila, Pseudomonas stutzeri, Pseudomonas pseudoalcaligenes, Pseudomonas aeruginosa, Plesiomonas shigelloides, Bacillus megaterium, Bacillus thuringiensis, Neisseria mucosa, Citrobacter freundii, Serratia marcescens, Staphylococcus epidermidis, Micrococcus luteus, Enterobacter aerogenes, and Enterobacter sakazakii.
2
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The Relationship between Benthic Macrofauna Community Structure and Density of Mangrove Vegetation in Mempawah Mangrove Park, West Kalimantan, Indonesia

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Noviatri S. E., Zahidah Z., Herawati H., Dewanti L. P.
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EN
This research was conducted in Mempawah Mangrove Park, West Kalimantan on July – August 2018. The research aims to map the benthic macrofauna community structure and its relationship with the structure of mangrove vegetation. The research method was a survey and use purposive sampling data method in observation stations based on different stages of mangrove vegetation. The observation stations consists of Avicennia marina and Rhizophora stylosa as the species of mangroves. Station 1 consists of mangroves in seedling size, station 2 consists of mangroves in pole size, and station 3 consists of mangrove trees. The benthic macrofauna consist of 8 species from 3 different classes, merostomata, malacostraca, and gastropods. The highest abundance value (155 ind/m2), diversity index (1,875) and similarity index (0,668) is in station 2. The relationship between benthic macrofauna abundance and mangrove density has -0,356 as the correlation coefficient which indicates that an increase of benthic macrofauna abundance is in line with the decrease of mangrove density. High density value in research shows that the mangrove is in seedling size, and vice versa a low density value indicates the mangrove trees. The coefficient of determination (0,1272) indicating that the abundance of benthic macrofauna is affected by the mangrove density as 12,72% and 87,28% affected by other factors.
3
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Macrozoobenthos community structure as an indicator of water quality in the mangrove area of Bojong Salawe, Pangandaran, West Java, Indonesia

100%
Widiastuti A., Zahidah Z., Herawati H., Arief M. C. W.
World News of Natural Sciences
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2023
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vol. 46
101-112
EN
Macrozoobenthos have a relatively fixed living habitat, limited movement, and live in and on the bottom of the waters. These properties make macrozoobenthos suitable for water use as a biological indicator. This research aimed to determine individual abundance, species diversity, and evenness of macrozoobenthos in the Mangrove area to determine the physical and chemical conditions based on diversity and the relationship between macrozoobenthos and environmental factors. This research was conducted in January 2022 in the Mangrove area of Bojong Salawe, Pangandaran, West Java. The data collection location is divided into four stations, with three plots at each station. The research results show that 35 species of 3 classes are spread over four stations. The abundance value of macrozoobenthos is at a value of 481.5 – 278 Ind/m2. The diversity index value is at a value of 1.15 – 1.45. The uniformity index value is 0.45 – 0.59.
4
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Identification of Fishing Business Activities with Encircling Gillnet in Anambas Islands Regency, Indonesia

88%
Apriliani I. M., Dewanti L. P., Herawati H., Putra P. K., Ramdhani F.
World News of Natural Sciences
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2023
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vol. 50
197-205
EN
Batu Belah Village is one of the areas in the Anambas Islands Regency. Most of the people in Batu Belah have their main source of livelihood as fishermen so the capture fisheries business is the dominant type of fishery business in the area. One of the fishing gear units used by fishermen in Batu Belah is the encircling gillnet. Research is focused on providing an overview of fishing business activities using encircling gillnets. Operations to catch encircling gillnets in Batu Belah Village are carried out every day except on rest days, which are Fridays. The fishing operation is carried out by 1–2 fishermen. The fish species that dominate the catch is the kalat fish. Encircling gillnet fishermen are divided into 2 groups based on the material for making nets, namely Polyamide (PA) and Polyethylene (PE) net fishermen. The business capital expended for fishing using PE nets is far greater than PA nets. The total operational costs incurred by PE encircling gillnet fishermen amount to IDR 347,500.
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