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Markus T. Lasut
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Jurnal Aquatic Science & Management, Gedung A Lantai 1, Pascasarjana, Universitas Sam Ratulangi, Jln. Kampus UNSRAT Bahu, Manado 95115, INDONESIA
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INDONESIA
AQUATIC SCIENCE & MANAGEMENT
Published by Universitas Sam Ratulangi
ISSN : 23374403     EISSN : 23375000     DOI : https://doi.org/10.35800/jasm.v10i1.37485
Core Subject : Science, Agriculture,
Agriculture, Biological Sciences & Forestry Biochemistry, Genetics & Molecular Biology
Journal of AQUATIC SCIENCE & MANAGEMENT publishes scientific articles of original research based on in-depth scientific study in the field of aquatic science and management, covering aspects of limnology, oceanography, aquatic ecotoxicology, geomorphology, fisheries, and coastal management, as well as interactions among them.
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 2 Documents
 1 
Search results for , issue "Vol. 12 No. 1 (2024): APRIL" : 2 Documents clear
Determination of organic content and the use of eco-enzyme solutions in reducing organic levels in water samples from Cukuh Raya Beach, Kaur Regency, Bengkulu Province, Indonesia Noviana, Noni; Johan, Henny; Mayub, Afrizal; Nurhamidah; Firdaus, M. Lutfhi
JASM Vol. 12 No. 1 (2024): APRIL
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v12i1.54930

Abstract

Cukuh Raya Beach coastal water is potentially polluted by organic materials from shrimp ponds. The purpose of this study was to determine the content of organic materials (ammonia [NH3], nitrate [NO3], phosphate [PO4], and fatty oil) discharged into the coastal waters and to examine the role of eco-enzymes in reducing the organic material levels. Two points of sampling were selected, i.e., 10 and 100 m from the pipeline outfall discharge of shrimp ponds. An experiment was carried out to compare the level of organic content before and after the eco-enzyme solutions were given. Sampling and technique analysis of seawater were done following the Indonesian National Standards. The data were analysed using the Indonesian quality standards for marine biota and the pollution index. The results showed that seawater samples from the coast contained organic waste, with the highest levels at 10 m from the outfall. The level of organic content decreased after the addition of eco-enzyme solutions. The conclusion is that the organic materials (ammonia, nitrate, phosphate, and fatty oil) were found in water samples in the waters of Cukuh Raya Beach and were moderately polluted by ammonia (NH3). The addition of an eco-enzyme solution can reduce the concentration of organic materials.
Characteristics of sea surface current during the second transitional monsoon in the Bangka strait, North Sulawesi, Indonesia Kusumawardani, Niken; Djamaluddin, Rignolda; Angmalisang, Ping Astony; Manu, Lusia; Pelle, Wilmy Etwil
JASM Vol. 12 No. 1 (2024): APRIL
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v12i1.55445

Abstract

Understanding the dynamics of surface currents in the Bangka Strait is crucial for various maritime and coastal activities. This strait connects Likupang, a super-priority tourism destination, with other islands in North Sulawesi. These activities include navigation safety, inter-island transportation, fisheries, search and rescue operations, and marine pollution control. This study investigated the characteristics of currents in the strait using a hydrodynamic model called Delft3D. The result revealed that the currents exhibit a tidal pattern, with dominant westward flow during floods and eastward flow during ebb. Maximum sea current velocity during spring tide in the second transition monsoon occurred in September 2022, with an average speed of 102.67 cm/s. Current ellipse analysis confirmed the tidal type of the currents.

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