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Journal of Coastal and Ocean Sciences
Published by Universitas Riau
ISSN : 27454355     EISSN : 27464512     DOI : -
Core Subject : Science, Agriculture, Social,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology Environmental Science Immunology & microbiology Physics
Journal of Coastal and Ocean Sciences is a journal publishes scientific articles from research by lecturers and other researchers in the marine sector. Covers aspects of biology, physics and chemistry, both for brackish waters (mangrove swamps, river estuaries) and marine waters (coastal and offshore seas).
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 13 Documents
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Search results for , issue "Vol. 1 No. 1 (2020): September" : 13 Documents clear
The Diversity and Abundance of Planktonic Diatoms Vertically in Nareh Coastal Waters Manggung Village North Pariaman Sub-District Pariaman City West Sumatera Province Prasiska, Yulia; Thamrin, Thamrin; Siregar, Sofyan Husein
Journal of Coastal and Ocean Sciences Vol. 1 No. 1 (2020): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

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

Abstract

This research was conducted in March 2020 to find out the difference in planktonic diatoms abundance vertically at each station in the waters of Nareh Beach, Manggung Village, North Pariaman Sub-District, Pariaman City, West Sumatra Province. The method used is a survey method that consists of three depths at three observation stations. The water quality measured in this study were temperature, brightness, pH, salinity, current velocity, and depth. Based on the research results, there are 11 types of planktonic diatoms found in the waters of Nareh Beach, namely Gyrosigma sp., Chaetoceros sp., Odontella sp., Rhizosolenia sp., Pleurosigma sp., Thalassionema sp., Leptocylindrica sp., Coscinodiscus sp., Nitzschia sp., Guinardia sp, and Skeletonema sp. the most dominant one. The highest total value of planktonic diatom abundance ranges (9779.65-12867.96 ind/L) is found in the surface layer and the lowest ranges (2573.59-10294.37 ind/L) is at 5 m depth. There is no difference in the total value of planktonic diatom abundance between depths
This study was conducted in January 2020, located in Api-api Village, Bandar Laksamana District, Bengkalis. The purpose of this study was to determine the effect of the total organic of sediment content on the density of bamboo clam (S. lamarckii), in the Zulkifli, Muhammad; Nasution, Syafruddin; Efriyeldi, Efriyeldi
Journal of Coastal and Ocean Sciences Vol. 1 No. 1 (2020): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

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

Abstract

This study was conducted in January 2020, located in Api-api Village, Bandar Laksamana District, Bengkalis. The purpose of this study was to determine the effect of the total organic of sediment content on the density of bamboo clam (S. lamarckii), in the intertidal zone. The method used in this study was a survey method. The results show that the content of organic sediment was relatively low with an average of 1.28%. The density of bamboo clam that ia found mostly in subzone 1 with the number 25 ind. The most frequent distribution of bamboo clam sizes is in the range of 5.0-5.4 cm with 56 inds. The relationship of organic sediment content with the density of bamboo clam is very weak with r = 0.1519 and R2 = 2.31%
Growth of Bacteria Bacillus cereus in Liquid Mediums with Different Carbohydrate Sources Ningsih, Irma Ardila; Feliatra, Feli; Effendi, Irwan
Journal of Coastal and Ocean Sciences Vol. 1 No. 1 (2020): September
Publisher : Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau

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

Abstract

Bacteria need a medium to grow Bacillus cereus is a probiotic bacterium. Molasses and tofu liquid waste are one of the wastes that are used as alternative medium, because they are easy to obtain, cheap, and contain nutrients that are high enough in the form of carbohydrates. This study aimed to determine the optimal medium for the growth of these bacteria. This study used a completely randomized factorial design. It consists of three factors, namely the type of waste (molasses + egg albumen and tofu liquid waste + egg albumen), then the combination of isolates (B. cereus SN7 and consortium), and the concentration of liquid waste used for medium growth is (molasses is 1%; 1.5% ; and 2% while tofu liquid waste is 8%; 10%; and 12%). Bacterial cell growth was measured by the Total Plate Count (TPC) method, spectrophotometric method, and biomass, while the incubation period for cell growth was measured every 0, 6, 12, 18, and 24 hours. The results of this study indicated that molasses + egg albumen with a concentration of 1% was the best medium for the growth of B. cereus bacteria along with consortium isolates

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