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Asian Journal of Aquatic Sciences
Published by Universitas Riau
ISSN : 2655366X     EISSN : 27164608     DOI : http://dx.doi.org/10.31258/ajoas
Core Subject : Agriculture,
Agriculture, Biological Sciences & Forestry
Asian Journal Of Aquatic Sciences is a journal publishes scientific articles from research by lecturers and other researchers in the waters sector. Focusing on aspects of aquatic ecology for the use of this habitat as an ecosystem for producing food (fisheries and agriculture) and its function for the earth's ecosystem. Covers aspects of biology, physics and chemistry, both for freshwater (rivers, lakes, swamps, reservoirs), brackish waters (mangrove swamps, river estuaries) and marine waters (coastal and offshore seas).
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Articles 40 Documents
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Search results for , issue "Vol. 7 No. 1 (2024): April" : 40 Documents clear
SUSTAINABILITY STATUS OF TRAP FISHERIES IN THE SOUTHERN PART OF RANGSANG ISLAND Brown, Arthur; Simamora, Valentine Vanda; Yani, Alit Hindri
Asian Journal of Aquatic Sciences Vol. 7 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

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

Abstract

On Rangsang Island, many still work as fishermen or depend on the sea, especially in the southern part of Rangsang Island. Fishermen in the south part of Rangsang Island still use a lot of traditional fishing gear, such as the grinder. The polluted waters on Rangsang Island and destructive technology will impact the fishermen's fishing economy. This study aims to determine and assess the sustainability of fishing gear in terms of ecological, economic, and technological aspects in the southern part of Rangsang Island using the rapfish technique. The method used was a survey method, and the sampling used a purposive sampling technique. The analysis of the rapfish technique found that sustainability in the ecological dimension was 33.53% or less sustainable. In the economic dimension, it was 36.01% or less sustainable. In comparison, it was 76.71% sustainable in the technological dimension.
DISTRIBUTION PATTERN OF TOTAL SUSPENDED SOLIDS (TSS) IN KAMPAR RIVER ESTUARY, PELALAWAN REGENCY, RIAU PROVINCE Melas, Febi Betania; Mubarak, Mubarak; Rifardi, Rifardi
Asian Journal of Aquatic Sciences Vol. 7 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

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

Abstract

The Kampar River Estuary is the main river in Riau province, which empties into the Malacca Strait and has a unique potential for research. The characteristics of the Kampar River Estuary are concurrent and have high tidal elevations, resulting in the occurrence of a Tidal Bore, which is referred to as Bono. The impact of sedimentation is generally quite detrimental, namely the siltation in several places, such as the waters of the Kampar River Estuary, which are dense areas of human activity. This study aimed to determine the relationship between hydrodynamic patterns, suspended solids' distribution pattern, and the concentration value of suspended solids distribution in the Kampar River estuary. This research method is surveyed and discussed descriptively. Current patterns affect the distribution of sediments in the Kampar River estuary. The TSS distribution pattern tends to follow the same direction as the movement of tidal currents where, during high tide, it tends to lead to the southwest of the Kampar River estuary, while during low tide tends to lead to the northeast and northwest, it this is because, in the Kampar River estuary, there is an island that makes the mouth of the Kampar River estuary V-shaped. Between hydrodynamic patterns and TSS distribution patterns, there is a moderate negative relationship (r = 0.50), which means that there is a significant influence between hydro patterns and TSS distribution patterns in the waters of the Kampar River estuary, between hydrodynamic patterns and TSS distribution patterns in the waters of the Kampar River estuary. The lowest value of TSS concentration in the waters of the Kampar River Estuary at high tide to low tide is Station 7, with a range of 102 mg/L, and the highest value at Stations 3, 4, and 9. At station 3, there are values ranging from 1756 mg/L; at Station 4, there are values ranging from 2823 mg/L; and at Station 9, there are values ranging from 1269 mg/L; the high concentration of TSS results in low brightness in the study area.
CATCH COMPOSITION AND ENVIRONMENTAL FRIENDLINESS LEVEL OF SONDONG FISHING GEAR LANDED AT THE FISHERY HARBOR OF RIAU PROVINCE Dani, Rahma; Brown, Arthur; Nasution, Polaris
Asian Journal of Aquatic Sciences Vol. 7 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

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

Abstract

Sondong fishing gear is one of the dominant fishing gear used by fishermen in the UPT Fisheries port of Riau Province Dumai City, which, when operated, can scrape to the bottom of the waters. The specifications of sondong fishing gear affect the catch. This study aimed to determine the composition of catches based on type, length, and weight and explain the level of environmental friendliness of sondong fishing gear that refers to the FAO 1995 CCRF criteria and Taeran 2014 subcriteria. The method used in this research is a survey method, which is conducted by conducting interviews and collecting data directly in the field, then analyzing it using descriptive statistics. The results showed that the composition of the main catch was white shrimp (Penaeus merguiensis), red prawn (P.monodon), and kelong shrimp (P. indicus). At the same time, the bycatch was white pomfret (Pampus argenteus), gulamah (Pseudocienna amovensis), gangetic anchovy (Thryssa mystax), malung (Muraenesox cinereus), stingray (Dasyatis sp), and crab (Portunus pelagicus). The environmentally friendly level of sondong fishing gear, with a value of 16.43 from the interviews with 23 respondents using 8 criteria, states that sondong fishing gear is a category of fishing gear that is not environmentally friendly.
SUSTAINABILITY STATUS OF BELAT FISHING TOOLS BASED ON ECOLOGICAL, TECHNOLOGICAL AND SOCIAL ASPECTS IN MERBAU DISTRICT, RIAU PROVINCE Brown, Arthur; Fadhli, Rezky; Zain, Jonny
Asian Journal of Aquatic Sciences Vol. 7 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

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

Abstract

This research was carried out in November 2022 in Merbau District, Meranti Islands Regency, Riau Province, to determine the sustainability status of the belat fishing gear based on ecological, social and technological aspects. The method used in this research is a survey method, while purposive sampling is used to determine respondents. Data collection was carried out through observation, interviews and documentation directly with two academics from the UNRI Faculty of Fisheries and Marine, two people from the Meranti Regency Fisheries Service, four capture fisheries entrepreneurs (traders and collectors), two fishermen group leaders, and ten fishermen. The research results show a decrease in the number of belat fishing gear every year; in 2020, the number of belat fishing gear was 65 units, and in 2022, the number of belat fishing gear was nine units. Belat fishing gear is not selective, as seen from the leverage analysis that has been carried out with a sensitivity attribute value of 40.53. Belat can catch small fish that are not yet suitable for catching. The sustainability status of belat fishing gear is seen through the attribute values ​​of three dimensions. The sustainability index value for the ecological dimension of the belat fishing gear is 51.11, meaning it is pretty sustainable. The sustainability index value of the technological dimension in fishing using belat fishing gear is 40.53, which is classified as less sustainable. The index value of the social dimension in fishing using the belat fishing gear is 59.99, meaning it is in the reasonably sustainable category.
MACROZOOBENTHOS COMMUNITY STRUCTURE IN THE INTERTIDAL ZONE OF MUARA AIR HAJI VILLAGE PESISIR SELATAN REGENCY WEST SUMATERA PROVINCE Alhadad, Ilham; Tanjung, Afrizal; Zulkifli, Zulkifli
Asian Journal of Aquatic Sciences Vol. 7 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

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

Abstract

Muara Air Haji Village is a coastal area with various anthropogenic activities that can disrupt the aquatic ecology, especially in the intertidal zone. Biological indicators such as macrozoobenthos are needed to provide a correct and sustainable picture of water quality. This research uses a survey method to determine macrozoobenthos' type, abundance, diversity, uniformity, dominance, and distribution pattern in the intertidal zone. Sampling was carried out using three stations, and each station consisted of three transects and three subzones comprised of the upper, middle, and lower intertidal zones using a quadrant plot measuring 1 x 1 m. The results of this research found three classes of macrozoobenthos with five species. Abundance values ​​at each station ranged from 0.89–4.56 ind/m2, while abundance in the intertidal subzone ranged from 1.11–3.56 ind/m2. The diversity index (H') at stations I and III is 1.93 and 1.17, which means it is included in the medium diversity category, while the diversity index (H') at station II is 0.84, which means it is included in the low category, moderate distribution of individuals or non-uniform number of individuals, moderate ecological pressure and moderately polluted water stability. The uniformity index value ranges from 0.65–0.99, which means the uniformity category is balanced. At station II, macrozoobenton dominates with an index value of 0.62, while stations I and III have no dominant species with index values ​​of 0.30 and 0.45. The distribution pattern (Id) of macrozoobenthos is clustered with a value of 3.45–4.18.
THE RELATIONSHIP BETWEEN ORGANIC MATERIAL CONTENT IN SEDIMENTS AND THE ABUNDANCE OF EPIPELIC DIATOMS IN THE INTERTIDAL ZONE OF THE WATERS OF DUMAI CITY, RIAU PROVINCE Simanjuntak, Josua; Siregar, Sofyan Husein; Efriyeldi, Efriyeldi
Asian Journal of Aquatic Sciences Vol. 7 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

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

Abstract

This research was conducted in March 2023, located in Koneng Beach, Dumai City. The purpose of this study was to determine the organic matter content and abundance of epipelic diatoms vertically and to analyze the relationship between the organic matter content in sediments and the abundance of epipelic diatoms vertically in the intertidal area of Dumai City Waters. The method used is the survey method. The sampling point is determined using a purposive sampling method. Sampling of epipelic diatoms was carried out using a modified corer, which was then brought to the laboratory to identify and calculate the abundance of diatoms and the sediment samples to calculate the content of organic matter and sediment fractions. Water quality measurements accompanied sampling with a brightness value of 0.57 m, temperature of 33 °C, current speed of 0.33 m/s, salinity of 28 ppt, and pH of 8.13. The results of the analysis of organic matter are 2.55 – 13.38%. The results of the sediment fraction analysis show that the research location is dominated by sandy silt. Nineteen genera of epipelic diatoms were found in the waters of Koneng Beach, Dumai City, with abundance values between 5,291–39,983 ind/cm2. The one-way ANOVA test results obtained an average value of 0.000, meaning there is a significant difference in the abundance of epipelic diatoms between the sediment layers. The results of the linear regression test showed that the effect of sediment organic matter on the abundance of epipelic diatoms was 50.85%.
BIOMASS PRODUCTION AND SINGLE-CELL PROTEIN (SCP) ENCAPSULATION OF BACTERIA Bacillus cereus SN7 Mukramin, Ibnu; Feliatra, Feliatra; Tanjung, Afrizal
Asian Journal of Aquatic Sciences Vol. 7 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

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

Abstract

Bacillus cereus SN7 is a bacterium with potential applications in producing Single-Cell Protein (SCP). SCP can be an alternative to protein derived from traditional sources like agriculture, fisheries, and animal husbandry. Encapsulation is a process used to stabilize cells, aiming to potentially enhance probiotics' viability and stability throughout production, storage, and handling. This study aims to make capsules from B. cereus SN7 single-cell protein to protect them from contaminants. This study used a survey method, which carried out in-situ processing of bacteria, as well as conducting experiments on the formation of bacterial encapsulation, testing the effectiveness of encapsulation, and observing the viability of B. cereus SN7 bacteria by counting the number of colonies. B. cereus produced biomass with a total dry weight of 1.3708 g/mL. The alginate encapsulation experiments can be formed into capsule beads that protect bacteria. The best encapsulation process is an alginate-based coating, which is indicated by the ability of the alginate to withstand temperature, pH, and salinity.
GASTROPOD DIVERSITY AS A BIO-INDICATOR OF AQUATIC POLLUTION IN SIRONJONG GADANG ISLAND PESISIR SELATAN DISTRICT Sihotang, Usia Xoros; Tanjung, Afrizal; Yoswaty, Dessy
Asian Journal of Aquatic Sciences Vol. 7 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

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

Abstract

This study aims to determine the diversity of gastropods and water conditions on Sironjong Gadang Island, Pesisir Selatan Regency. This research was conducted in August 2022 in the waters of Sironjong Gadang Island and the Marine Biology Laboratory and Marine Chemistry Laboratory of the Department of Marine Science, Universitas Riau. The method used in this research is the survey method, which is direct observation of the research area and sampling and measurement of water quality parameters in the field. The results of the study found gastropod species consisting of 4 (four) families, 4 (four) genera, and 8 (eight) species. The diversity value (H') was at a moderate level of diversity. The highest gastropod density was found at Station I, with a density value of 16.33 ind/m², and the lowest density was found at Station III, with a density value of 13.89 ind/m². The highest relative density was Monodonta labia species, with a relative density value of 27.6%, while the lowest relative density was Haustrum-scoring species, with a relative density value of 3.3%. Temperature 28-29˚C; salinity 25-27 ppt; pH 7.91-7.95; brightness 1.55-2.65 m. The sediment type at Station I was dominated by muddy gravel, Station II was dominated by sandy gravel, and Station III was defeated by sandy gravel with a total sediment organic matter content of 6.10-10.05%.
HYDROLYSATE CHARACTERISTICS OF BERUNOK SEA CUCUMBER (Paracaudina australis) AND TOTAL AMINO ACID USING PEPSIN ENZYMES Kembaren, Bella Billiant J Ananta; Karnila, Rahman; Hasan, Bustari
Asian Journal of Aquatic Sciences Vol. 7 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

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

Abstract

Berunok sea cucumber has a nutritional content that can be utilized as a functional food ingredient. This study determined the characteristics of berunok sea cucumber hydrolysate (Paracaudina australis) and the type and level of total amino acids. This research was conducted using experimental methods, with a Non-Factor Complete Randomized Design consisting of 3 levels of enzyme concentration treatment (1%, 2%, and 3%) with three replicates. In this study, the parameters tested were the proximate content of flour and hydrolysate of berunok and the type and content of total amino acids. The results showed that the chemical composition of berunok flour was water 11,40% (dw), ash 10,82% (dw), protein 68,21% (dw), fat 6,53% (dw), and carbohydrate by the difference of 14,43% (dw). The best treatment for preparing berunok protein hydrolysate using pepsin enzyme is 2% pepsin enzyme concentration. The proximate of berunok protein hydrolysate is water 6.87% (dw), ash 8.45% (dw), protein 80,59% (dw), and fat 2,86% (dw). The results of the identification of types and levels of total amino acids found 17 kinds of amino acids with a total of 16.524% in hydrolysate berunok.
POTENTIAL AND LEVEL UTILIZATION OF SKIPJACK (Katsuwonus pelamis) IN THE BUNGUS OCEAN FISHING PORT WEST SUMATERA PROVINCE Brown, Arthur; Purba, Rina Ade Citra
Asian Journal of Aquatic Sciences Vol. 7 No. 1 (2024): April
Publisher : Lembaga Penelitian dan Pengabdian Kepada Masyarakat Universitas Riau

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

Abstract

The skipjack (Katsuwonus pelamis) in Bungus Ocean Fishing Port has been evaluated for its sustainable potential using the surplus production approach method. The findings indicate a strong alignment with the Fox approach model. The estimated sustainable potential for skipjack is 471 tonnes per year, with an ideal effort of 45 trips annually. The analysis indicates a moderate utilization status, with an average skipjack utilization rate of 62.76%. It is evident that around 37.24% of its maximum sustainable potential, equivalent to 154.74 tonnes per year, is still unexplored. In addition, the catch rate of skipjack is relatively high at 96.14%, indicating that there is still some untapped potential, with 3.86% of the optimal fishing effort or two trips per year remaining unused. As a result, it is recommended that a total allowable catch of 341 tons be set in order to ensure the long-term sustainability of skipjack harvesting in the area.

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