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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 4 Documents
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Search results for , issue "Vol. 10 No. 2 (2022): OCTOBER" : 4 Documents clear
Analysis of metal pollution index in waters in the central Java area, Indonesia Sapta Suhardono; Iva Yenis Septiariva; Mega Mutiara Sari; I Wayan Koko Suryawan
. Vol. 10 No. 2 (2022): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v10i2.40974

Abstract

Central Java is one of the regions in Indonesia with a lot of water resources that must be appropriately managed. In addition, metal content in water bodies in Central Java must now be assessed to prevent health impacts that may be measurable. One of the methods to analyze the management of water bodies is the water quality index method. This study aimed to examine the water quality index due to metal contamination in water bodies in Central Java. Metal measurements were carried out using the AAS (Atomic Absorption Spectrophotometry) method. The value of the water quality index using the water quality index method for waters in Central Java in 2015-2018 was categorized to mild to moderately polluted, and only 2 locations were measured as heavily polluted. Two areas that are included in the heavily polluted category were the waters of Bulakan and Bojonegoro in 2016. To determine the cause of why the water quality index value being classified as moderately polluted and lightly polluted, we must look at the metal parameters that contribute the most to the index value. These parameters can be initial information on the pollutant source that causes pollution.
The first record of the rare Leucetta avocado sponge from Sangihe Islands, Indonesia Rieuwpassa, Frets J.; Balansa, Walter
JASM Vol. 10 No. 2 (2022): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v10i2.48431

Abstract

Calcareous sponges represent the rarest class of marine sponges, constituting only 4% of the currently known sponge species globally. While abundant of demosponges have been reported from various locations in Indonesia, only 40 species of calcareous sponges have been identified in the country over the past 200 years. This suggests the rarity of these sponges and a significant knowledge gap regarding the Leucetta sponge in Indonesia. The objective of this study was to describe the biology of a calcareous sponge belonging to the genus Leucetta, which was collected from the Sangihe Islands in Indonesia. Morphological analysis was conducted using a modified acid digestion method, and the obtained data were compared to reported data for Leucetta sponges. The sponge exhibited triactine spicules, which are characteristic of Leucetta species. The number list of Indonesian Leucetta sponges was determined through a literature search. Previous research indicated that 40 identified calcareous sponges were reported in Indonesia between 1890 and 2023. Interestingly, L. avocado is known as a native sponge to Palau, although this species and closely related species have been reported elsewhere. Therefore, it is predicted that the current distribution of L. avocado in the Sangihe Islands and Bali could be attributed to a combination of the Indonesian Throughflow, sexual propagation, or stepping stone scenarios. This research provides new insights into the biology of L. avocado from Indonesia.
Challenges in waste management at the household level in settlements along the Sario River as the source of marine debris to Manado Bay, Indonesia Veronika A. Kumurur; Jane M. Mamuaja; Markus T. Lasut; Veibe Warouw
AQUATIC SCIENCE & MANAGEMENT Vol. 10 No. 2 (2022): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v10i2.50424

Abstract

Marine debris mitigation should be conducted thoroughly especially in the level where they are originated, which is household and settlement areas. In developing countries, waste management in household level has been a challenge because it has never been done properly. This study aims to evaluate the content and the application of waste management guidelines in settlement areas along the river, to assess the level of understanding of each head of family in using the guidelines and to assess the awareness level in doing the waste management. There are two aspects of waste management in household level: 1) waste management mechanisms, and 2) awareness of each head of family in was management. Mechanism aspect of waste management consists of two components. They are (1) guidelines in management mechanisms (which consists of guideline content and level of understanding-compliance) and (2) implementation of management mechanisms. Awareness aspect of each head of family in conducting waste management were assessed based on three components, they are 1) knowledge, 2) concern, and 3) willingness. A number of 249 households (from a total 453 who live in both sides of the river) were interviewed (as respondents) and they were chosen randomly. The respondent was those with family (parents and children) and the head of the household. The interview was conducted using a questionnaire, which content several questions related to the assessed aspects. The data was quantitatively analysed using a simple Statistics obtain percentages. The result shows that the a detailed content of guidelines on how to properly manage the was not found, the level of understanding on waste management was still low, the implementation of waste management in the level of household has not been done properly, and the willingness to share the finance in waste management is also low. It is then concluded that waste management at the household level in the regions faces various challenges. The best choice in waste management aspect at the household level is given in in this paper.
Strategic action for waste management in Manado City to prevent marine debris input to Manado Bay: a preliminary study Ricky L. Rengkung; Jane M. Mamuaja; Veibe Warouw; Markus T. Lasut
AQUATIC SCIENCE & MANAGEMENT Vol. 10 No. 2 (2022): OCTOBER
Publisher : Universitas Sam Ratulangi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35800/jasm.v10i2.50487

Abstract

Marine debris has become a serious threat for the coastal and marine environment. Their presence can degrade the quality of marine environments and also has negative impact on several aspects of people lives especially public health and aesthetics. Several efforts have been made, both short (to mitigate the impacts) and long terms (to manage them properly) efforts. Strategic action in waste management is very important in order to manage marine debris in Manado City; this is the objective of the research. In order to achieve the objective, several aspects on situation and condition of marine debris in Manado Bay has been described, and this include composition and density of debris at the coastal area, the quantity of the debris, waste management on land, the status of public awareness, the impact and degradation of marine debris in nature, institutional regulation, and waste management and planning. These aspects were analyzed to identify strengths and weaknesses before strategic actions for management are developed. The results showed that the composition, density, and quantity of marine debris in Manado Bay increased from 2017 to 2019. Waste management on land has been going well, the government institutions dealing with waste have been adequately arranged. Five strategic actions for waste management in Manado City to prevent the input of the waste to Manado Bay are proposed, they are: a) encouraging people to reduce the use of plastic-based products; b) involving people and community institution in waste management on land; c) increasing the activities of the community and community institution in keeping the environment (river, beach) clean; d) inviting the community and community institutions in working together to develop action programs which will be implemented jointly; and e) improvising the waste management according to existing regulations which include marine debris in specific management target and also incorporating rivers and other areas in waste management according to regulation.

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