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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 5 Documents
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Search results for , issue "Vol. 2 No. 1 (2023)" : 5 Documents clear
Effect of Mesh Size on Fishing Gear Gill Nets on the Catch in the Sub-District of Teluk Meranti, Pelalawan Regency Irma Glaudia; Polaris Nasution; Bustari Bustari
Tropical Marine Enviromental Sciences Vol. 2 No. 1 (2023)
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.2.1.1-7

Abstract

The size of the gill net in the waters of Pangkalan Terap Village is 2.5 inches, 3 inches, and 5 inches, but its use is still based on the current season. This study aims to determine the effect of gillnet mesh size on catches, determine the number, type, weight, and size of catches, and determine the size of gill nets that are effectively used to catch fish in Pangkalan Terap Village. This research was conducted in April - June 2022 in Pangkalan Terap Village, Teluk Meranti District, Pelalawan Regency, Riau Province. The method used in this research is an experimental fishing method with a Randomized Group Design. The results showed that the mesh size of 2.5 inches, 3 inches, and 5 inches in the rainy and dry seasons in Pangkalan Terap Village had a significant effect on the number and weight of fish caught (Fcount> FTable). The number of fish caught in the rainy season was 219 fish weighing 46259 g, while in the dry season, 241 fish weighing 79435g. The types of catches in all nets in both seasons were ten species dominated by Cyclocheillichthys sp. 2.5-inch gill nets are more effectively used because they get the most diverse catches compared to other nets
Fishery Harbor Needs Analysis for Fishery Vessel Activities in Ocean Bungus Fishery, West Sumatra Province Azandy Bamesyah; Nofrizal Nofrizal; Arthur Brown
Tropical Marine Enviromental Sciences Vol. 2 No. 1 (2023)
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.2.1.8-11

Abstract

The size of the harbor pool will affect the number of ships that will dock. The purpose of this research is to determine the size of the port pool needs and determine the depth of the port pool needed for smooth activities at PPS Bungus. Data collection is done directly in the field to see the maximum number of ships anchored the port pool area (m2), the depth of the port pool (m), data on the width, length, and depth of the largest ship (m), the maximum tide in the port pool (m), and the squat or height of the oncoming ship (m). The results concluded that the existing harbor pool is no longer able to accommodate all ships that dock. The current harbor pool area is 40,000 m2 with 348 vessels, requiring a pool area of 458,762.06 m2. The current average harbor pool depth is 2.75 m, and it is safe for ships to anchor in the harbor pool
Productivity and Financial Analysis of Fishing Effort with Handline at Kutaraja Oceanic Fishing Port Aceh Province Angga Setia Manalu; Jonny Zain; Arthur Brown
Tropical Marine Enviromental Sciences Vol. 2 No. 1 (2023)
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.2.1.12-16

Abstract

Production of catches on hand line fishing gear at Kutaraja Ocean Fishing Port has declined. This is seen from the level of fish production produced, which was 2.407.580 tons in 2018, compared to in 2019 which was 2.285.750 tons. The fishing business, which has become one of the livelihoods of the Indonesian people, is a little riskier than other businesses because the fish, which are the play target of this business, are constantly moving dynamically. The research objective was to determine productivity per GT, Trip, and ABK on hand line fishing gear and to determine the financial feasibility analysis of fishing effort on hand line fishing gears at Kutaraja Ocean Fishing Ports. The benefits of this research are to increase knowledge and insight regarding productivity and financial analysis of the fishing line effort. The method used in this study is a survey method. The data analysis method used in this research is descriptive. The results showed that the value of productivity per trip with large-size ships has a high amount of production compared to smaller ship sizes. Hand line fishing with a vessel size >30 GT has a relatively long payback period, <5 years. While ships with a height of 5 GT, 6 GT, 9 GT, 22 GT, and 24 GT have a payback period of <3 years
The Atmospheric and Oceanic Processes on Thermal Front Variability over the Java Sea Rahaden Bagas Hatmaja; Rangga Amrullah; Shinta Ayu Kusumaningrum; M. Restu Putra Sugianto
Tropical Marine Enviromental Sciences Vol. 2 No. 1 (2023)
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.2.1.17-20

Abstract

The Java Sea is influenced by various atmospheric and oceanographic factors such as monsoon winds and the inflow of water from adjacent seas, thus leading to the formation of thermal fronts. In this research, the atmospheric process over the thermal front was estimated by using sea surface temperature (SST) gradient and crosswind-SST gradient calculation based on the GLORYS12V1 monthly SST data from Copernicus Marine Service (CMEMS) and the ERA5 monthly surface wind data from European Centre for Medium-Range Weather Forecasts (ECMWF) for 27 years (from 1993 to 2019). Moreover, the oceanic process was determined from the volume transports of three major channels surrounding the Java Sea, which are Karimata Strait, Sunda Strait, and the eastern boundary of the Java Sea. Based on the annual variance analysis, there are four main thermal front areas, such as Northern Java Coast (NJC), Eastern Sumatra Coast (ESC), Western Borneo Coast (WBC), and Eastern Borneo Coast (EBC). The annual variation of the thermal front over the ESC, WBC, and ESC has two peaks in March and October, while the NJC thermal front area has three peaks in March, July, and November. This study results that the thermal front activities over the NJC, WBC, and EBC are significantly correlated to the wind stress curl over those areas, with a coefficient correlation of about 0.62, -0.92, and -0.73, respectively. In addition, the increase in thermal front activity over the NJC area is controlled by negative wind stress curl with no lag time, while the WBC and EBC areas are controlled by positive wind stress curl with a lag time of 1 month (wind stress leads). On the other hand, the thermal front activity over the ESC area is closely related to southward volume transport from the Karimata Strait, with a correlation coefficient of -0.74 and a lag time of 2 months (volume transport leads).
Composition of Catch Results from Gombang Fishing Tools in Prapat Tunggal Village, Bengkalis District, Riau Province Desi Mahrani; Jonny Zain; Isnaniah Isnaniah
Tropical Marine Enviromental Sciences Vol. 2 No. 1 (2023)
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.2.1.21-25

Abstract

One of the livelihoods of the people of Prapat Tunggal Village, Bengkalis Regency, Riau Province, is fishing. The fishing gear fishermen operate is longline, gombang, drier, and gill nets. The research was conducted in June to determine the composition of catches from gombang fishing gear in Prapat Tunggal Village. The method used is a survey method and descriptive analysis. From the results of this research, the number of catches from gombang fishing equipment was 153.77 kg or 433,290 fish. The dominant net is rebon shrimp, which is the main catch of 77.90% of the total weight of the trap and the bycatch catch of 20.92%, as well as the discard catch of 1.17%.

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