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Ronal Kurniawan
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Faculty of Fisheries and Marine, Universitas Riau, Pekanbaru 28293 Indonesia
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Tropical Marine Environmental Sciences
Published by Universitas Riau
ISSN : -     EISSN : 29620759     DOI : https://doi.org/10.31258/tromes
Core Subject : Science, Social,
Biochemistry, Genetics & Molecular Biology Earth & Planetary Sciences Environmental Science Physics
Focusing on aspects of Aquatic ecology and Biology ini marine water. Original research that makes a significant contribution to field of marine: Moleculer biology; marine biology; Environmental Sciences; Oceanography; GIS; Marine pollution; and Marineculture
Arjuna Subject : Ilmu Pertanian dan Biologi (Semua) - Ilmu Perairan
Articles 35 Documents
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Identification of Plankton Species and Environmental Parameters in Lhok Bubon Coastal Waters, Aceh Barat Wahyuni, Sri; Mursawal, Asri; Samudra, Arung; Rizqi, Miftahul; Ananda, Eva Ersia; Ramadhan, Azhari
Tropical Marine Environmental Sciences Vol. 4 No. 2 (2026): May
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/tromes.4.2.31-37

Abstract

Plankton plays a crucial role in aquatic ecosystems as primary producers and bioindicators of water quality. However, baseline information on plankton composition and environmental conditions in the coastal waters of Lhok Bubon, Aceh Barat, remains limited. This study aimed to identify plankton taxa and assess environmental parameters in the study area. Field sampling was conducted in October 2025 at three stations, with three replicates per station. Plankton samples were collected using a plankton net, preserved with Lugol’s solution, and identified under a light microscope based on morphological characteristics. Water quality parameters, including temperature, pH, salinity, and dissolved oxygen (DO), were measured in situ. A total of 10 plankton taxa were identified, dominated by phytoplankton from the class Bacillariophyceae, followed by Cyanophyceae, zooplankton, and other microorganisms. The presence of diatoms such as Aulacoseira granulata and Synedra ulna indicates favorable conditions for primary productivity. Environmental parameters remained relatively stable, with temperature ranging from 31.4 to 32.9°C, salinity from 30 to 34 ppt, pH around 8.27, and DO averaging 11.45 mg/L, all within suitable ranges for aquatic life. The results indicate that Lhok Bubon coastal waters are in relatively good condition and capable of supporting plankton growth and ecological processes. However, the presence of cyanobacteria and organically associated microorganisms suggests the need for continuous monitoring to maintain environmental quality
The Effect of Different Types of Bait on the Main Catch of Mud Crabs (Scylla serrata) Using Pento Fishing Gear in the Kerandin River, Lingga Regency, Riau Islands Province Novelia Shafyra; Jonny Zain; Nofrizal Nofrizal
Tropical Marine Environmental Sciences Vol. 4 No. 2 (2026): May
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/tromes.4.2.44-49

Abstract

The Kerandin River is located in North Lingga District, Lingga Regency, one of the districts in the Riau Islands Province. Geographically, Lingga Regency is situated between 0°20' N and 0°40' S and 103°30' E and 105°00' E. The residents of Kerandin Village earn their livelihood as farmers and fishermen. One of these potentials is the potential for fisheries, including both capture fisheries and aquaculture. The primary fishery commodity in Lingga Regency is the Mangrove Crab (Scylla serrata). Mangrove crabs are a fishery product with significant economic value, typically caught using pento fishing gear. Pento is a static fishing tool that requires bait to operate. People in Kerandin Village use stingrays as bait. However, one potential bait in the Kerandin River is cheap and easy to obtain but has not been used as bait, namely mullet, which will be tested as an alternative bait for catching mangrove crabs. This research used the Experimental Fishing method, and the data were analyzed using normality tests and T-tests. The research showed that the bait for belukang (Hexanematichthys sagor) produced more crab catches than the bait for stingrays (Trygon sephen). The T-test comparing these two bait types revealed a significant difference, with a value of -2.804 (df = 18) and a significance level of 0.006.
Analysis of Changes in the Position of the Tidal Front in the Waters at the Mouth of the Pangabuan River, Kuala Tungkal, Tanjung Jabung Barat District, Jambi Amin Fatah; Elizal Elizal; Syahril Nedi
Tropical Marine Environmental Sciences Vol. 4 No. 2 (2026): May
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/tromes.4.2.38-43

Abstract

This study aims to determine the distribution patterns of salinity and temperature, as well as changes in the position of the front in the waters at the mouth of the Pangabuan River in Kuala Tungkal, Jambi Province. This research was conducted in July 2022 in the waters of the Pangabuan River in Kuala Tungkal, Jambi Province. The analysis was conducted at the Oceanographic Physics Laboratory of the Department of Marine Science, Faculty of Fisheries and Marine Science, Riau University. There were two research stations: Station 1 was located in the river, and Station 2 was in the estuary. The tidal conditions in the waters of Kuala Tungkal are semi-diurnal, with two tides affecting the front in these waters. The highest tide occurs during the full moon (spring tide), reaching 3.1 m, while the lowest tide is 0.5 m. The tides strongly influence the position of the front; at high tide, the front is located deep within the river (2.45 km) from the estuary mouth, making it difficult to see and observe, while at low tide, the front is situated in front of the estuary mouth (1.4 km), making it easier to see and observe. The salinity distribution pattern in the front area shows a significant difference due to the mixing of two water bodies with different salinities: lower salinity comes from the river, and higher salinity from the sea. At high tide, salinity ranges from 20 ppm to 24.8 ppm; at low tide, from 17.3 ppm to 22.1 ppm. The highest temperature at high tide was 31.2°C and the lowest was 26.8°C; at low tide, the highest temperature was 31.6°C and the lowest was 27.6°C
Analysis of Oceanographic Physical Parameters at Sako Bungus Beach Athiyyah Salwaa Andini; Nabila Afifah Azuga; Okta Rizal Karsih; Ronal Kurniawan; Fharisa Nabila Rizvi
Tropical Marine Environmental Sciences Vol. 4 No. 2 (2026): May
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/tromes.4.2.55-59

Abstract

This study was conducted at Sako Beach, Bungus Teluk Kabung District, Padang City, West Sumatra, to analyze the physical parameters of the water and examine changes in the shoreline occurring in the area. Data collection was conducted in November 2024 at five observation stations located using GPS. The measured parameters included water temperature, salinity, current velocity, and beach slope. The results showed that water temperatures ranged from 34 to 35°C, which is relatively high for tropical coastal waters. Salinity values ranged from 15 to 22 ppt, indicating brackish water characteristics and the influence of freshwater runoff from the land. Current velocity ranged from 0.1 to 0.25 m/s, falling into the category of weak to moderate currents, while the beach slope ranged from 0.744° to 2.919°, indicating a gently sloping beach. These physical conditions are interrelated and play a role in coastal dynamics, particularly in sediment distribution. Analysis of shoreline changes indicates that Sako Beach is undergoing accretion, or land gain, driven by sedimentation. The gentle slope influences this process, as does relatively low wave energy and the potential contribution of terrestrial runoff. The results of this study show that the dynamics of physical water parameters play a significant role in shaping changes in coastal morphology; therefore, periodic monitoring is necessary to support sustainable coastal zone management
Bathymetric Mapping Techniques for Shallow Marine Waters Using Satellite Image Data at the Oceanographic Research Center (P2O)-LIPI in Jakarta Nabila Afifah Azuga; Fharisa Nabila Rizvi; Okta Rizal Karsih; Ronal Kurniawan
Tropical Marine Environmental Sciences Vol. 4 No. 2 (2026): May
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/tromes.4.2.50-54

Abstract

An application is a subclass of computer software that utilizes the computer’s capabilities directly to perform a task desired by the user. The purpose of this study was to investigate bathymetric mapping techniques using Planet Scope satellite imagery and methods for processing data collected in the field. The research was conducted from January to February 2019 at the Remote Sensing Laboratory of the Oceanography Research Center, Indonesian Institute of Sciences (P2O-LIPI), East Ancol, North Jakarta. The methods used during this internship included active participation and literature review. To this context, the author processed satellite image data and analyzed the data using a laptop equipped with ArcGIS 10.5, Microsoft Excel, and ENVI 5.3. The results from data processed manually to determine absolute depth exhibited a higher level of accuracy ompared to data processed automatically

Page 4 of 4 | Total Record : 35

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