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Ronal Kurniawan
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Faculty of Fisheries and Marine,Universitas Riau Kampus Bina Widya KM. 12,5 Simpang Baru, Tampan, Pekanbaru 28293 Indonesia
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Jurnal Perikanan dan Kelautan
Published by Universitas Riau
ISSN : 08537607     EISSN : 27218902     DOI : https://doi.org/10.31258/jpk
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Energy Materials Science & Nanotechnology Physics
Jurnal Perikanan dan Kelautan (JPK) aims to promote interdisciplinary research and to foster collaboration among researchers from diverse backgrounds. Jurnal Perikanan dan Kelautan (JPK) is committed to publishing high-quality, original research that makes a significant contribution to fields of aquaculture and fisheries encompassing: Aquaculture Aquaculture Nutrition Management Aquaculture Disease and Immunology Fish Biochemistry, Genetics, and Molecular Biology Fish Reproduction, Physiology, and Endocrinology Fishery Resource Habitats and Management Genetic Engineering and Biotechnology of Aquatic Organisms Aquatic Biology, Environment, and Ecology
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 43 Documents
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Search results for , issue "Vol. 27 No. 3 (2022): October" : 43 Documents clear
Subsurface Marine Heatwaves of South Java Sea: Trend, Frequency, Duration, and Cumulative Intensity Based on Assimilation Model (1993-2019) Azuga, Nabila Afifah; Radjawane, Ivonne M.
Jurnal Perikanan dan Kelautan Vol. 27 No. 3 (2022): October
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Marine heatwaves (MHWs) are extreme warming events in the ocean when the temperature detected is above the 90th percentile of climatological temperature for at least five consecutive days. MHWs events can extend up to thousand kilometers and have been detected in the subsurface layer. MHWs are described by metrics (frequency, duration, and cumulative intensity). The purpose of this study was to determine the characteristics of MHWs in the subsurface layer for 27 years (1993-2019). The data used in this study is the sea water temperature data of the depth 0,4m-763m from Marine Copernicus Global Ocean Physics and Niño 3.4 indices. The method used in this study is a statistical method to calculate the average and trend of the MHWs metric. The results of this study denotes that the occurrence of MHWs at a depth of 0.4m-92m is caused by ENSO (El Niño Southern Oscillation) positive phase (El Niño) with a delay of 7-8 months and at a depth of 109m-763m caused by negative phase ENSO (La Niña) with a delay of 1-3 months. It was also found that the frequency of MHWs was higher at a depth of 418m-763m with a maximum value is 2,6 events/year, the duration of MHWs was greater at a depth of 0,4m-77 m, with a maximum value of duration is 30-32 days/year, and the maximum cumulative intensity of MHWs events for 27 years is 90˚C. During the 1993-2019, the trend of frequency, duration, and cumulative intensity of MHWs in the subsurface layer of south Java Sea has significantly increased.
The Effect of Differences Color of Artificial Bait on Sepioteuthis lessosiana catches using Hand Line Ramdhani, Farhan; Yunita, Lauura Hermala; Magwa, Rizky Janatul; Gelis, Ester Restiana Endang; Wulanda, Yoppie
Jurnal Perikanan dan Kelautan Vol. 27 No. 3 (2022): October
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Hand Line is a traditional fishing gear that commonly used by a fisherman in the Panggang Island, Kepulauan Seribu to catch bigfin reef squid (Sepioteuthis lessosiana). The purpose of this research is to analize the effect of color differences on artificial bait to catchment product of squid and to determine the bait’s colors that produce the most catches of squid. This research was conducted through an experimental method using a randomized block design (RAK) for 14 repetitions. Total of catches that earned amounted to 268 individuals (32,1 kg) consisted of 79 individuals (9,1 kg) caught with artificial baits orange color combination of white, 57 (7,7 kg) caught with artificial baits green color combination of white and 132 individuals (15,3 kg) caught with artificial bait color combination of red and white.
Isolation of Lactic Acid Bacteria from Digestive Tract of Asian Swamp Eel (Monopterus albus) and Bacterial Antagonist Test to Inhibit Pathogenic Bacteria Aeromonas hydrophila and Pseudomonas sp Alfinda, Rudi; Lukistyowati, Iesje; Syawal, Henni; Putra, Iskandar
Jurnal Perikanan dan Kelautan Vol. 27 No. 3 (2022): October
Publisher : Fakultas Perikanan dan Kelautan Universitas Riau

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31258/

Abstract

Lactic Acid Bacteria (LAB) are probiotic-forming bacteria that have characteristics, like be able to ferment sugar or carbohydrates and produce lactic acid as the final product of fermentation. The purpose of this study was to obtain isolates of lactic acid bacteria from the digestive tract of Asian Swamp Eel (Monopterus albus) and to determine the inhibition produced by these lactic acid bacteria in inhibiting pathogenic bacteria such as Aeromonas hydrophila and Pseudomonas sp. The method was used in this study is experimental method, by taking the digestive tract of Asian Swamp Eel and then identifying the lactic acid bacteria and characterized by morphological and biochemical characteristics and tested of the antagonist against the pathogenic bacteria A.hydrophila and Pseudomonas sp. using the Kirby Bauer disc method (disc method). From the research results obtained 5 types of candidate lactic acid bacteria with each code BL121, BL263, BL142, BL242 and BL342. The five isolates of lactic acid bacteria were able to inhibit A.hydrophila and Pseudomonas sp. with a Inhibition range of 8-16 mm. Based on the results of the study, there were three isolates that had inhibitory power against bacteria A. hydrophila (12-16 mm) and Pseudomonas sp (11-13 mm) with codes BL121, BL263 and BL142 and were classified as strong. The identification results obtained are bacteria from the genus Bacillus sp.

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