Tropical Marine Environmental Sciences
type: channel
description: sitemap
publisher: Department of Marine Science, Faculty of Fisheries and Marine Universitas Riau
language: en
publication name: Tropical Marine Environmental Sciences
issn: 2962-0759
items: Comparison of the Abundance of Macrozoobenthos in Areas Affected and Unaffected by Reclamation in Pesisir Selatan District
items: The Potential of Marine Bacteria in Plastic Biodegradation: A Review
items: Liquid Waste Management Techniques by Using Equipment Operation System and Ipal System in PT Pertamina Trans Continental Dumai, Riau
items: Mapping the Distribution of Sea Surface Temperature and Chlorophyll-a in the Waters of Pieh Island Conservation Area Using Aqua MODIS Satellite Imagery
items: Size Study of Sand Grain in the Aroen Meubanja Turtle Conservation Area, Aceh Jaya
items: Relationship Between Total Suspended Solid (TSS) and Phytoplankton Abundance in the Waters of Rupat Strait, Riau Province
items: Marine Water Quality Mapping in Rupat Strait with Modelling Hydrodynamics
items: Gastropod Community Structure in the Coastal Waters of Lalang Village Siak Regency
items: Community Structure of Decapods in the Coastal Waters of Rupat Utara District
items: Diversity and Distribution Patterns of Gastropoda (Mollusca) in the Mangrove Area of Tiram Beach, Padang Pariaman Regency, West Sumatra Province
items: Catch Composition and Selectivity Drift Gillnet in Pambang Pesisir Village Bantan Subdistrict Bengkalis Regency
items: Macrozoobenthos Community Structure at Teluk Marunggai Beach, Nagari Sungai Nyalo, Pesisir Selatan District, West Sumatera Province
items: Analysis of Upwelling Parameters when the El Nino Southern Oscillation (ENSO) Occurred in the Halmahera Sea
items: The Identification of Upwelling in the Occurrence of Tropical Cyclone Charlotte in the Waters of Southern Java (Case Study: March 17-28, 2022)
items: Toxicity of Cadmium (Cd) on Artemia salina
items: Composition of Catch Results from Gombang Fishing Tools in Prapat Tunggal Village, Bengkalis District, Riau Province
items: The Atmospheric and Oceanic Processes on Thermal Front Variability over the Java Sea
items: Productivity and Financial Analysis of Fishing Effort with Handline at Kutaraja Oceanic Fishing Port Aceh Province
items: Fishery Harbor Needs Analysis for Fishery Vessel Activities in Ocean Bungus Fishery, West Sumatra Province
items: Effect of Mesh Size on Fishing Gear Gill Nets on the Catch in the Sub-District of Teluk Meranti, Pelalawan Regency
items: Facility Utilization Study Fish Landing Base Dumai Riau Province
items: Composition of Fishing Gear Pengerih at Day and Night in Meskom Village, Bengkalis District
items: Identification of Diversity of Coral Fish Species in the Rumpon Area in Banyak Island District, Aceh Singkil Regency
items: Factors Affecting the Amount of Marine Supply on Sondong and Gillnet Ship at UPT Fishery Port of Riau Province
items: Composition Analysis of Bubu Catches in the Napangga River, Tanjung Medan District, Rokan Hilir Regency
items: Isolation of the Fungus on Mantis shrimp (Squilla mantis) Trafficked at the Fish Quarantine Station for Quality Control of Fishery Products Safety (SKIPM) Pekanbaru
items: Using Rhizhopora apiculata Extract for Mosquito Larvae Control
items: Survival Rate Lemon Fish (Rachycentron canadum) Larvae in Lampung Marine Aquaculture Center
items: Endangered Shark Species Identified in Bintan Island Waters, Riau Island Province, Indonesia
items: Population Growth and Chlorophyll Content of Spirulina platensis Fertilized with Azolla microphylla

Comparison of the Abundance of Macrozoobenthos in Areas Affected and Unaffected by Reclamation in Pesisir Selatan District
type: item
description: This study aims to identify differences in macrozoobenthos abundance in areas affected and unaffected by reclamation around the Mandeh Tourism Area. This study was conducted in February–March 2023, using a survey method and sampling with the transect method. This study's results indicate that the water's condition in the Mandeh Tourism Area is still within the limits of the water quality standards and is quite good for the survival of macrozoobenthos. Macrozoobenthos found in Mandeh Tourism Area consisted of 12 families, namely Arcidae, Asterinidae, Cardiidae, Ellobiidae, Nassariidae, Neritidae, Potamididae, Siphonariidae, Trochidae, Turbinidae, Vanikoridae and Veneridae. A mixture of sand and gravel dominates the sediment type in the Mandeh Tourism Area. The total organic matter content of the sediments ranged from 3.65 to 3.90% (low). The density value of macrozoobenthos individuals in areas affected by reclamation is 5.89 ind/m2 with the highest relative density, Terebralia sulcata (26%), in areas unaffected by reclamation the average density of individuals is estimated at 10, 57 ind/m2 with abundance the highest relative is the type Pythia scarabaeus (23%).
subject: Articles
  topic: section
subject: Mandeh Tourism Area
  topic: keywords
subject: Macrozoobenthos
  topic: keywords
subject: Beach reclamation
  topic: keywords
creator: Marhamah Nurul Mufidah
creator: Sofyan Husein Siregar
creator: Afrizal Tanjung
rights: Copyright (c) 2025 Marhamah Nurul Mufidah, Sofyan Husein Siregar, Afrizal Tanjung (Author) https://creativecommons.org/licenses/by/4.0
date: 2025-05-17
publication date: 2025-05-17
starting page: 59
ending page: 66
doi: 10.31258/tromes.3.2.59-66

The Potential of Marine Bacteria in Plastic Biodegradation: A Review
type: item
description: Ocean plastic pollution has become a significant problem affecting ecosystems and human health. One promising approach to address this issue is biodegradation by marine microorganisms, particularly bacteria. This article reviews recent studies (2021–2024) exploring the ability of marine bacteria to degrade plastics. Based on the research, certain marine bacteria have been proven capable of producing enzymes effective in breaking down various plastics. The article also discusses the challenges and opportunities in developing biotechnology based on marine bacteria to tackle plastic pollution
subject: Articles
  topic: section
subject: Marine Bacteria
  topic: keywords
subject: Biodegradation
  topic: keywords
subject: Plastic
  topic: keywords
creator: M Riswan
creator: Ronal Kurniawan
creator: Irwan Effendi
creator: Mega Novia Putri
rights: Copyright (c) 2025 M Riswan, Ronal Kurniawan, Irwan Effendi, Mega Novia Putri (Author) https://creativecommons.org/licenses/by/4.0
date: 2025-05-17
publication date: 2025-05-17
starting page: 67
ending page: 70
doi: 10.31258/tromes.3.2.67-70

Liquid Waste Management Techniques by Using Equipment Operation System and Ipal System in PT Pertamina Trans Continental Dumai, Riau
type: item
description: Managing liquid waste from the oil and gas industry is crucial to prevent water pollution. PT Pertamina Trans Kontinental Dumai is one of the companies active in oil and gas operations, which produces liquid waste from exploration and production processes. This study aims to determine the company's fluid waste management system and the readiness of oil spill response equipment. The methods include direct observation, interviews with relevant parties, and literature review. The observations indicate that wastewater treatment is carried out through three stages: physical separation, chemical treatment, and biological processes using aerated tanks and sedimentation. The quality test results show that parameters such as BOD, COD, oil and grease, ammonia, total phenol, pH, and temperature are within the established quality standards. Additionally, PT Pertamina Trans Kontinental Dumai has complete and well-maintained emergency response facilities for oil spills, including oil booms, oil skimmers, dispersants, and sorbents. In conclusion, the management of liquid waste and equipment readiness for oil spill response at PT Pertamina Trans Kontinental Dumai complies with standards, thereby minimizing the risk of marine environmental pollution.
subject: Articles
  topic: section
subject: Water Quality
  topic: keywords
subject: Liquid Waste
  topic: keywords
subject: Management
  topic: keywords
subject: System Oil Spill
  topic: keywords
creator: Aprilia Wulandari
creator: Jacinda Qoidatun Shandy
rights: Copyright (c) 2025 Aprilia Wulandari, Jacinda Qoidatun Shandy (Author) https://creativecommons.org/licenses/by/4.0
date: 2025-05-17
publication date: 2025-05-17
starting page: 41
ending page: 47
doi: 10.31258/tromes.3.2.41-47

Mapping the Distribution of Sea Surface Temperature and Chlorophyll-a in the Waters of Pieh Island Conservation Area Using Aqua MODIS Satellite Imagery
type: item
description: Pieh Island Conservation Area is a conservation area that has abundant biodiversity, including coral reefs, turtles, whales, dolphins, and others. This study aims to determine the Mapping of Sea Surface Temperature Distribution and chlorophyll-A in the Pieh Island Conservation Area Waters Using AQUA MODIS Satellite Imagery. The methods used are active participation, literature study, and discussion with field supervisors in the Pieh Island Marine Conservation Area, West Sumatra Province. The results of the Thematic Internship Program MBKM with the title Mapping the Distribution of Sea Surface Temperature and Chlorophyll-A in the Waters of Pieh Island Conservation Area Using Aqua MODIS Satellite Imagery. Based on the graph, the average sea surface temperature and chlorophyll-a concentration in the Pieh Island Waters Conservation Area show that the highest sea surface temperature during 2023 is in February at 30 ° C, which continues to decrease to the lowest value in May. Then it increases again from June to August, respectively 27.5°C, 27°C, and 27.5°C, and then drops in September by 27.5°C. Furthermore, the chlorophyll-a concentration value has the lowest value in April with a value of 0.182 mg/m3and the highest peak is in August with a value of 0.362 mg/m3, The results of the correlation test between sea surface temperature and chlorophyll-a show a significance value of 0.152 which is greater than the general significance level of 0.05. Therefore, based on the statistical significance criterion, it cannot be ignored that there is no significant influence between the two variables. At the same time, however, the Pearson correlation value is -0.519, which reflects the negative relationship between sea surface temperature and chlorophyll-a.
subject: Articles
  topic: section
subject: Chlorophyll
  topic: keywords
subject: Aqua Modis Satellite Imagery
  topic: keywords
subject: Pieh Island
  topic: keywords
creator: Natasya Debora Christiani Maatitawaer
creator: Fharisa Nabila Rizvi
creator: Fitri Kurniati
rights: Copyright (c) 2025 Natasya Debora Christiani Maatitawaer, Fharisa Nabila Rizvi, Fitri Kurniati (Author) https://creativecommons.org/licenses/by/4.0
date: 2025-05-17
publication date: 2025-05-17
starting page: 48
ending page: 52
doi: 10.31258/tromes.3.2.48-52

Size Study of Sand Grain in the Aroen Meubanja Turtle Conservation Area, Aceh Jaya
type: item
description: Due to its unique coastal characteristics, the Aroen Meubanja Turtle Conservation Area in Aceh Jaya has significant potential as a nesting site for sea turtles. This study analysed the area's sand grain size and characteristics to determine its suitability for turtle nesting. The research was conducted in March 2024, with sand samples collected from three stations using purposive random sampling. Laboratory analysis included sieving and sand grain classification based on size and shape using the Wentworth and Powers classifications. The Wentworth scale is used to classify grain size, while the Powers scale assesses the shape and roundness of the grains. The results revealed that over 70% of the sediment in the area consists of very fine sand, which is highly favourable for turtle nesting. The roundness of the sand grains indicates a long transportation process, contributing to their suitability for nesting. Fine sand allows for proper water drainage, preventing waterlogging in nests and maintaining optimal temperatures for egg incubation. Additionally, environmental factors such as beach width, slope, substrate temperature, humidity, and coastal vegetation further enhance the area's potential as a turtle conservation site. This study concludes that the Aroen Meubanja coastal area meets the criteria for an ideal turtle nesting habitat. Recommendations include habitat management, community education, and further research to ensure sustainable conservation efforts
subject: Articles
  topic: section
subject: turtle conservation
  topic: keywords
subject: sand grain size
  topic: keywords
subject: very fine sand
  topic: keywords
subject: Aroen Meubanja
  topic: keywords
subject: nesting habitat
  topic: keywords
creator: Sri Wahyuni
creator: Samsul Bahri
creator: Hayatun Nufus
creator: Asri Mursawal
rights: Copyright (c) 2025 Sri Wahyuni, Samsul Bahri, Hayatun Nufus, Asri Mursawal (Author) https://creativecommons.org/licenses/by/4.0
date: 2025-05-17
publication date: 2025-05-17
starting page: 53
ending page: 58
doi: 10.31258/tromes.3.2.53-58

Relationship Between Total Suspended Solid (TSS) and Phytoplankton Abundance in the Waters of Rupat Strait, Riau Province
type: item
description: This study was conducted in March 2023 in the waters of the Rupat Strait, Riau Province. This study aimed to determine the total suspended solid (TSS) concentration, the type and abundance of phytoplankton, and the relationship between TSS concentration and phytoplankton in the Rupat Strait waters. The method used was a survey method; the location of the study was determined by purposive sampling; there were 4 sampling stations consisting of 3 sampling points. The results showed that the highest average TSS was at Station 4 (98.33 mg/L), and the lowest was at Station 1 (85 mg/L). There were 14 types of phytoplankton found, namely Nitzschia sp, Synedra ulna, Isthmia obliquita, Rhabdonema adriticum, Grammatophora sp, Guinardia striata, Rhizosolenia alata, Cyclotella atomus, Oscillatoria sp, Lyngbya sp, Tolypothrix sp, Pleurotaenium sp, Closterium sp, Gonatozygon sp with the most dominant species being Isthmia obliquata, Synedra ulna, Grammatophora sp. The highest abundance was in the Darul Aman area (5004.207 ind/L), and the lowest was in the Bandar Bakau area (2573.592 ind/l). The relationship between TSS and phytoplankton abundance shows a strong and negative relationship, meaning that the higher the TSS, the lower the abundance of phytoplankton in the waters of Rupat Strait.
subject: Articles
  topic: section
subject: Rupat Strait
  topic: keywords
subject: TSS
  topic: keywords
subject: Abundance
  topic: keywords
subject: Phytoplankton
  topic: keywords
creator: Alqoriffah Hasanah
creator: Irvina Nurrachmi
creator: Syafruddin Nasution
rights: Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0
date: 2024-11-27
publication date: 2024-11-27
starting page: 32
ending page: 40
doi: 10.31258/tromes.3.01.32-40

Marine Water Quality Mapping in Rupat Strait with Modelling Hydrodynamics
type: item
description: This research aims to analyze water quality and determine the status of quality standards in the waters of Rupat Strait. The method used in the study is comparative descriptive analysis and literature analysis. Hydrodynamic and water quality models with MIKE 21 Hydrodynamics and ECO Lab modules were used to examine the distribution of water quality parameters in the waters of Rupat Strait. The results showed that the waters of the Rupat Strait have a depth between 2-15 m with a velocity of 0.15-0.3 m/s. DO concentration has an interval of 5-6 mg/L, then BOD concentration has an interval of 0.8-2.4 mg/L, salinity has an interval of 17- 27‰, and temperature has an interval of 26-310C. Water quality in Rupat Strait is still within the quality standards. The pollution index calculation in Rupat Strait obtained values between 1<IP<5, indicating that Rupat Strait is still classified as lightly polluted
subject: Articles
  topic: section
subject: Mike 21
  topic: keywords
subject: Rupat strait
  topic: keywords
subject: Water quality
  topic: keywords
creator: Chandra M Aulia
creator: Syahril Nedi
creator: Elizal Elizal
rights: Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0
date: 2024-11-21
publication date: 2024-11-21
starting page: 25
ending page: 31
doi: 10.31258/tromes.3.01.25-31

Gastropod Community Structure in the Coastal Waters of Lalang Village Siak Regency
type: item
description: Class Gastropods is the largest class of the Phylum Mollusca. Changes influence the gastropod community structure in terms of environmental factors. This study was conducted in the coastal waters of Lalang Village, Sungai Apit District, Siak Regency, in June 2022, aiming to determine the structure of the Gastropod community, which includes species, density, diversity, uniformity, dominance, and distribution pattern, and water quality. Sampling using the line transect method was carried out at four stations. The study found eight species of gastropods; the gastropod density values obtained at each research station were 3.57-4.84 ind/m2. The value of the gastropod diversity index (H') was categorized as medium, the gastropod uniformity index (E) was classified as high, and the dominance index value (C) indicated that there were no dominant species in the waters. The distribution pattern of gastropods between observation stations is clustered
subject: Articles
  topic: section
subject: Gastropods
  topic: keywords
subject: Community Structure
  topic: keywords
subject: Lalang Village
  topic: keywords
creator: William Simamora
creator: Zulkifli Zulkifli
creator: Syafruddin Nasution
rights: Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0
date: 2024-11-14
publication date: 2024-11-14
starting page: 18
ending page: 24
doi: 10.31258/tromes.3.01.18-24

Community Structure of Decapods in the Coastal Waters of Rupat Utara District
type: item
description: Decapods are one of the macrozoobenthos consisting of the Taxonomy of the last five pairs of the eight thoracic appendages. This study aimed to determine the structure of the decapod community in the waters of Rupat Utara District Beach, including abundance, diversity, uniformity, dominance index, distribution pattern, and community similarity index in Rupat Utara waters. The survey method was used in the study. Determination of observation stations was carried out purposively. The species found consisted of 8 (eight) species from Rupat Utara waters. The abundance of decapods was 1,326 ind/Ha. The diversity index value (H'= 1.48) is included in the medium category. The value of the uniformity index (E = 0.83) is included in the high category. The dominance index (C = 0.31) and similarity index of decapod community I to II is 83%, I to III 77%, and II to III 93%.
subject: Articles
  topic: section
subject: Rupat Utara
  topic: keywords
subject: Coastal
  topic: keywords
subject: Decapods
  topic: keywords
subject: Community Structure
  topic: keywords
creator: M. Aqbal Firmandika
creator: Syafruddin Nasution
creator: Zulkifli Zulkifli
rights: Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0
date: 2024-11-14
publication date: 2024-11-14
starting page: 10
ending page: 17
doi: 10.31258/tromes.3.01.10-17

Diversity and Distribution Patterns of Gastropoda (Mollusca) in the Mangrove Area of Tiram Beach, Padang Pariaman Regency, West Sumatra Province
type: item
description: This study was conducted in March 2023 at Tiram Beach, Padang Pariaman Regency, West Sumatra Province. This study aims to determine the diversity and distribution patterns of gastropods in the mangrove area of Tiram Beach, Padang Pariaman Regency. The method used in this study was a survey method that involved direct observation of the study area, after which samples were analyzed in the laboratory. Gastropod sampling sites in the mangrove area were determined by targeted sampling consisting of 3 (three) stations at each station with three transects with 5 square plots of 1x1 m² spaced 10 m each. The results showed that the gastropod diversity in the Tiram Beach mangrove area was included in the low and medium categories. Gastropod distribution patterns at each station are categorized as clustered. Sediment organic matter in the Tiram Beach mangrove area achieved the highest average value of 4.52-22.13%. The sediment fraction at each station is silty sand and gravelly sand.
subject: Articles
  topic: section
subject: Tiram Beach
  topic: keywords
subject: Distribution Pattern
  topic: keywords
subject: Diversity
  topic: keywords
subject: Gastropods
  topic: keywords
creator: Remi Fiter
creator: Syafruddin Nasution
creator: Afrizal Tanjung
rights: Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0
date: 2024-11-02
publication date: 2024-11-02
starting page: 1
ending page: 9
doi: 10.31258/tromes.3.01.1-9

Catch Composition and Selectivity Drift Gillnet in Pambang Pesisir Village Bantan Subdistrict Bengkalis Regency
type: item
description: Gill nets are placed perpendicular to the water to block the swimming direction of the fish. Fish are caught by being entangled in the meshes or entangled (spun) in the body of the net. This research was conducted in Pambang Pesisir Village, Bantan District, Bengkalis Regency, to know the composition of the catch and the selectivity of drift gill nets, comparing the composition of the number, type, weight, and size of the catch from different mesh sizes, and knowing how to catch fish (entangled, gilled, snagged, wedged) on the same mesh used. This research was carried out in December 2020 using the experimental fishing method, which is a research method that uses samples of research objects caught on fishing gear for observation. The research results of drift gill nets are species-selective fishing gear. Moreover, drift gill nets with a mesh size of 7.62 cm are more selective than nets of 5.72 cm because they have a catch ratio value closer to 1 and catch more large fish (worth catching). How to catch fish with a mesh size of 5.72 cm, many fish were caught by snagged; namely, 65 fish (30%), wedged 61 fish (28%), gilled 59 fish (27%), and 33 fish entangled (15%). Meanwhile, for the mesh size of 7.62 cm, 30 fish (31%) were caught wedged, 27 fish (29%) snagged, 27 fish (29%) gilled, and ten fish entangled (11%).
subject: Articles
  topic: section
subject: Drift gillnet
  topic: keywords
subject: Selectivity
  topic: keywords
subject: Catch composition
  topic: keywords
creator: Dea Virgin Anggraita
creator: Bustari Bustari
creator: Polaris Nasution
rights: Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0
date: 2024-05-22
publication date: 2024-05-22
starting page: 51
ending page: 55
doi: 10.31258/tromes.2.02.51-55

Macrozoobenthos Community Structure at Teluk Marunggai Beach, Nagari Sungai Nyalo, Pesisir Selatan District, West Sumatera Province
type: item
description: Teluk Marunggai Beach, Nagari Sungai Nyalo, is one of the new tourist areas in Pesisir Selatan Regency which, over time, will begin to be in demand by tourists, which will have an impact on the life of the biota on the beach, one of which is macrozoobenthos. This research was conducted in March 2023 in the Intertidal Zone of Teluk Marunggai Beach, Sungai Nyalo Village, Koto Ampek Tarusan District, Pesisir Selatan Regency, West Sumatra Province. The purpose of this study was to determine the type and abundance of macrozoobenthos species in the coastal waters of Marunggai Bay and to determine the diversity, uniformity, dominance and distribution patterns of macrozoobenthos in the coastal waters of Marunggai Bay. The research method used is the survey method, where the sampling using the quadrant transect method is carried out at three stations. The research results found 40 species of macrozoobenthos. The most common species found at all stations were Turbo cinereus from the Turbinidae family and the Gastropod class. The macrozoobenthos abundance values ​​obtained ranged from 6.44–6.67 ind/m2. Species diversity index values ​​ranged from 3.06–3.52, namely high. Uniformity index values ​​ranged from 3.02 to 3.14, high uniformity, dominance index values ​​ranged from 0.10 to 0.15; no species dominated, and the value of the distribution pattern ranged from 2.959 to 2.962 with a group distribution pattern
subject: Articles
  topic: section
subject: Intertidal zone
  topic: keywords
subject: Macrozoobenthos
  topic: keywords
subject: Community structure
  topic: keywords
creator: Panji Ahmad Ariaz
creator: Zulkifli Zulkifli
creator: Efriyeldi Efriyeldi
rights: Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0
date: 2024-05-13
publication date: 2024-05-13
starting page: 42
ending page: 50
doi: 10.31258/tromes.2.02.42-50

Analysis of Upwelling Parameters when the El Nino Southern Oscillation (ENSO) Occurred in the Halmahera Sea
type: item
description: Upwelling events that occur in the Halmahera Sea are influenced by the El Nino Southern Oscillation (ENSO). Upwelling can cause sea surface temperatures to be lower than normal, affecting the potential of fishery resources in the region. The purpose of this study was to determine the conditions of sea surface temperature, chlorophyll-a content, salinity, and upwelling conditions when viewed from the parameters of chlorophyll-α content and sea surface temperature when El Nino was strong, El Nino was weak, La Nina was strong, and La Nina weak and in normal conditions in the Halmahera Sea region. The data used in this study include the Oceanic Nino Index, sea surface temperature, salinity, and chlorophyll-α content during the 2010–2019 period. A quantitative descriptive research type is used by filtering ENSO data to determine when ENSO occurred, then visualizing the data in each parameter and analyzing it. The results of this study show that upwelling is known to occur in the northern to western parts of the Halmahera Sea. When the El Nino phase is vital, the upwelling parameter changes, the sea surface temperature decreases to 27.1⁰C, the chlorophyll-α content increases to 0.70 mg/m3 compared to the normal phase, and the upwelling intensity changes.
subject: Articles
  topic: section
subject: Chlorophyll-α
  topic: keywords
subject: Sea surface temperature
  topic: keywords
subject: Upwelling
  topic: keywords
creator: Libertinus Marthinus
creator: Avrionesti Avrionesti
creator: Yosafat Donni Haryanto
creator: Latifah Nurul Qomariyatuzzamzami
rights: Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0
date: 2024-05-10
publication date: 2024-05-10
starting page: 36
ending page: 41
doi: 10.31258/tromes.2.02.36-41

The Identification of Upwelling in the Occurrence of Tropical Cyclone Charlotte in the Waters of Southern Java (Case Study: March 17-28, 2022)
type: item
description: Tropical cyclones are one of the meteorological phenomena that can have negative impacts on humans. These impacts can include heavy rainfall leading to floods and even storm surges. However, tropical cyclones can also have positive effects as they can trigger upwelling. Upwelling affects the fisheries aspect because in areas where upwelling occurs, sea surface temperatures are lower, and nutrients (such as phosphate and nitrate) are lifted from deeper layers of the ocean, which can affect the growth of phytoplankton. The objective of this research is to identify and analyze the upwelling phenomenon in the waters south of Java Island during the occurrence of Tropical Cyclone Charlotte. The data used in this research includes the intensity and movement direction of Tropical Cyclone Charlotte from the zoom.earth website and sea surface temperature, chlorophyll-a, mixed layer depth (MLD), and sea level anomaly data from the E.U. Copernicus Marine Service Information (CMEMS)-Global Monitoring and Forecasting Center during March 17-28, 2022. The results of this research indicate that upwelling was not identified during the period before or after the cyclone, as evidenced by sea surface temperatures between 28.5-29.5°C, chlorophyll-α concentration of <0.15 mg/m3, and a sea level rise of 0.1 m
subject: Articles
  topic: section
subject: Upwelling
  topic: keywords
subject: Tropical cyclone
  topic: keywords
subject: Sea surface temperature
  topic: keywords
subject: Chlorophyll-α
  topic: keywords
creator: Muhammad Ridwan Prasetya
creator: Avrionesti Avrionesti
creator: Yosafat Donni Haryanto
creator: Latifah Nurul Qomariyatuzzamzami
rights: Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0
date: 2024-05-10
publication date: 2024-05-10
starting page: 30
ending page: 35
doi: 10.31258/tromes.2.02.30-35

Toxicity of Cadmium (Cd) on Artemia salina
type: item
description: Cd is a non-essential metal and a widespread micropollutant that has physiological effects on aquatic organisms. Cd heavy metal poisoning can be acutely caused by contamination at high doses, while chronic poisoning is generally caused by low levels of contamination and long exposure time. This research was conducted in June 2022 at the Marine Chemistry Laboratory Faculty of Fisheries and Marine, Universitas Riau, which aims to determine the value of LC50 (Lethal Concentration) for 24 hours after being given a toxicant in the form of Cd and to determine the level of Cd toxicity in A. salina. The method used in this research is the experimental method with the experimental unit A. salina. The LC50 of Cd on A. salina revealed 11.7109 mg/L. This concentration is capable of causing the death of 50% of the test animals. Furthermore, the water quality in the acute toxicity test, P0 (control), was classified as good to support the life of A. salina, while at P1 (3.13 mg/L) - P5 (50 mg/L), it was classified as polluted
subject: Articles
  topic: section
subject: Cd
  topic: keywords
subject: Toxicity
  topic: keywords
subject: LC50
  topic: keywords
subject: Artemia salina
  topic: keywords
creator: Dyonisius Hutauruk
creator: Yusni Ikhwan Siregar
creator: Irvina Nurrachmi
rights: Copyright (c) 2024 https://creativecommons.org/licenses/by/4.0
date: 2024-05-03
publication date: 2024-05-03
starting page: 26
ending page: 29
doi: 10.31258/tromes.2.02.26-29

Composition of Catch Results from Gombang Fishing Tools in Prapat Tunggal Village, Bengkalis District, Riau Province
type: item
description: 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%.
subject: Articles
  topic: section
subject: Catch
  topic: keywords
subject: Composition
  topic: keywords
subject: Gombang
  topic: keywords
subject: Prapat Tunggal
  topic: keywords
creator: Desi Mahrani
creator: Jonny Zain
creator: Isnaniah Isnaniah
rights: Copyright (c) 2023 https://creativecommons.org/licenses/by/4.0
date: 2023-11-16
publication date: 2023-11-16
starting page: 21
ending page: 25
doi: 10.31258/tromes.2.01.21-25

The Atmospheric and Oceanic Processes on Thermal Front Variability over the Java Sea
type: item
description: 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).
subject: Articles
  topic: section
subject: Wind Stress Curl
  topic: keywords
subject: Volume Transport
  topic: keywords
subject: Thermal Front
  topic: keywords
subject: SST Gradient
  topic: keywords
subject: Java Sea
  topic: keywords
creator: Rahaden Bagas Hatmaja
creator: Rangga Amrullah
creator: Shinta Ayu Kusumaningrum
creator: M. Restu Putra Sugianto
rights: Copyright (c) 2023 https://creativecommons.org/licenses/by/4.0
date: 2023-11-13
publication date: 2023-11-13
starting page: 17
ending page: 20
doi: 10.31258/tromes.2.01.17-20

Productivity and Financial Analysis of Fishing Effort with Handline at Kutaraja Oceanic Fishing Port Aceh Province
type: item
description: 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
subject: Articles
  topic: section
subject: Payback Period
  topic: keywords
subject: Kutaraja Ocean
  topic: keywords
subject: Hand Line
  topic: keywords
subject: Production
  topic: keywords
creator: Angga Setia Manalu
creator: Jonny Zain
creator: Arthur Brown
rights: Copyright (c) 2023 https://creativecommons.org/licenses/by/4.0
date: 2023-11-16
publication date: 2023-11-16
starting page: 12
ending page: 16
doi: 10.31258/tromes.2.01.12-16

Fishery Harbor Needs Analysis for Fishery Vessel Activities in Ocean Bungus Fishery, West Sumatra Province
type: item
description: 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
subject: Articles
  topic: section
subject: Depth Requirements
  topic: keywords
subject: Pond Area
  topic: keywords
subject: Bungus Harbor
  topic: keywords
creator: Azandy Bamesyah
creator: Nofrizal Nofrizal
creator: Arthur Brown
rights: Copyright (c) 2023 https://creativecommons.org/licenses/by/4.0
date: 2023-11-13
publication date: 2023-11-13
starting page: 8
ending page: 11
doi: 10.31258/tromes.2.01.8-11

Effect of Mesh Size on Fishing Gear Gill Nets on the Catch in the Sub-District of Teluk Meranti, Pelalawan Regency
type: item
description: 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
subject: Articles
  topic: section
subject: Pangkalan Terap
  topic: keywords
subject: Gillnets
  topic: keywords
subject: Meshes
  topic: keywords
creator: Irma Glaudia
creator: Polaris Nasution
creator: Bustari Bustari
rights: Copyright (c) 2023 https://creativecommons.org/licenses/by/4.0
date: 2023-11-09
publication date: 2023-11-09
starting page: 1
ending page: 7
doi: 10.31258/tromes.2.01.1-7

Facility Utilization Study Fish Landing Base Dumai Riau Province
type: item
description: This study aimed to analyze the utilization study of Dumai Fish Landing Base facilities in Riau Province. This research was conducted in March 2023 at the Fish Landing Base (PPI) in Dumai City, Riau Province. The methods used in the study were surveys and interviews. The results showed that the fishing gear used by fishermen at PPI Dumai were gillnet, longline, sondong, and kurau net. The high percentage of utilization of dock facilities is about 545,45% and the port pool area is 139,98%, which means that the port pool area has exceeded highly utilized, while the utilization rate of the port pool depth is 87,5%, which means that it can still be utilized more optimally by fishermen. The utilization rate of the PPI Dumai auction building facility is 72,98%, which means that the auction building has exceeded being highly utilized
subject: Articles
  topic: section
subject: Facility Utilization
  topic: keywords
subject: Fish Landing Base
  topic: keywords
subject: Dumai
  topic: keywords
creator: Ulva Uziel Hasiholan Limbong
creator: Alit Hindri Yani
creator: Jonny Zain
rights: Copyright (c) 2023 Ulva Uziel Hasiholan Limbong, Alit Hindri Yani, Jonny Zain (Author) https://creativecommons.org/licenses/by/4.0
date: 2023-05-10
publication date: 2023-05-10
starting page: 62
ending page: 66
doi: 10.31258/tromes.1.02.62-66

Composition of Fishing Gear Pengerih at Day and Night in Meskom Village, Bengkalis District
type: item
description: Pengerih is one of the trapping gears used by fishermen in Meskom Village. The purpose of this study was to determine the composition of the catch of Pengerih including the type and weight of fish caught during the day and night. This research was conducted in September 2022 in Meskom Village, Bengkalis Regency. The method used in this research is the survey method. The analysis used is by calculating the level of main catch and bycatch using the formulation of Akiyama. Based on the results of the study, it was found that the catch of curler gear was 9 types with a total catch of 5.030 fish with a total weight of 51,08 kg. The dominant types of catch during the study were red shrimp (Parapenaeus longirostris) 1.272 fish weighing 10,64 kg, striped shrimp (Parapenaeopsis sculptilis) 1,158 fish weighing 9,71 kg, white shrimp (Panaeus merguiensis) 1,115 fish weighing 9,34 kg, thorn shrimp (Panulirus sp) 883 fish weighing 7,34 kg, Moustached thryssa (Engraulis mystax) 302 fish 3,84 kg. While the bycatch consisted of print shrimp (Harpiosquilla raphidea) 39 fish weighing 1,46 kg, Bombay duck (Harpodon nehereus) 75 fish weighing 5,42 kg, Panna croaker (Otolithoides microdon) 93 fish weighing 1,46 kg, Shorthead hairfin anchovy (Setipinna breviceps) 93 fish and weighing 1.87 kg. If you look at the results of the catch more tend to be a lot of catches at night 2.813 fish weigh 28.84 while during the day 2.217 fish weigh 22.24 kg
subject: Articles
  topic: section
subject: Day and Night
  topic: keywords
subject: Catch Composition
  topic: keywords
subject: Pengerih
  topic: keywords
subject: Meskom Village
  topic: keywords
creator: Dian Agustin
creator: Bustari Bustari
creator: Alit Hindri Yani
rights: Copyright (c) 2023 Dian Agustin, Bustari Bustari, Alit Hindri Yani (Author) https://creativecommons.org/licenses/by/4.0
date: 2023-05-10
publication date: 2023-05-10
starting page: 54
ending page: 61
doi: 10.31258/tromes.1.02.54-61

Identification of Diversity of Coral Fish Species in the Rumpon Area in Banyak Island District, Aceh Singkil Regency
type: item
description: This study aims to determine the diversity and abundance of reef fish around FADs in Balai Island Waters. This research was conducted in October - December 2022 in the waters of Balai Island, Aceh Singkil Regency. The method used is a Stationary Visual Census then identified using the reef fish identification guidebook. Based on the results of the study, 9 species of reef fish were identified, consisting of 6 species. The abundance of reef fish is 1.3 is included in the medium category, the diversity index is 1.676 medium category, uniformity is 0.935 abundance category, and dominance is 0.209 low category
subject: Articles
  topic: section
subject: FADs
  topic: keywords
subject: Reef Fish
  topic: keywords
subject: Balai Island
  topic: keywords
creator: Hamzanul Arif
creator: Burhanis Burhanis
rights: Copyright (c) 2023 https://creativecommons.org/licenses/by/4.0
date: 2023-05-10
publication date: 2023-05-10
starting page: 50
ending page: 53
doi: 10.31258/tromes.1.02.50-53

Factors Affecting the Amount of Marine Supply on Sondong and Gillnet Ship at UPT Fishery Port of Riau Province
type: item
description: The purpose of this study was to determine the factor of the need for supplies at sea in sondong boats and gillnets and to prove how strong the relationship between these variables is. This research was conducted in January 2022 at the UPT Fisheries Port of Riau Province using the survey method. The results showed that the factors of ship size, length of time at sea, and engine power had a strong effect on the amount of fuel carried. Based on the F-test with a confidence level of 87.1%. According to the T-test, the length of time at sea has the greatest influence, while for the application of ice, the factors of length of time at sea and catch greatly affect the amount of ice in the T-test with a confidence level (coefficient of determination) of 46.7%. According to the T-test, the length of time at sea has the greatest effect on the ice supply on the sondong ship. In gill nets, boat sizes, length of time at sea, and engine power have a strong effect on the amount of fuel carried. Based on the F test with a confidence level of 91.5%. According to the T-test, the length of time at sea has the greatest effect. Whereas in the provision of ice in gill net vessels, the length of time at sea and the catch also greatly affect the amount of ice carried with a confidence level (coefficient of determination) of 88%. According to the T-test, the length of time at sea has the greatest effect on the supply of ice in gill net boats
subject: Articles
  topic: section
subject: UPT Fishery Port of Riau Province
  topic: keywords
subject: Marine supply
  topic: keywords
subject: Gillnets
  topic: keywords
subject: Sondong
  topic: keywords
creator: Mhd. Haris Amin
creator: Jonny Zain
creator: Bustari Bustari
rights: Copyright (c) 2023 https://creativecommons.org/licenses/by/4.0
date: 2023-05-08
publication date: 2023-05-08
starting page: 42
ending page: 49
doi: 10.31258/tromes.1.02.42-49

Composition Analysis of Bubu Catches in the Napangga River, Tanjung Medan District, Rokan Hilir Regency
type: item
description: This study aims to determine the types of main catches and bycatch and to identify the dominant types and sizes of fish caught. This research was conducted from January to February 2023 in the waters of the Napangga River, Tanjung Medan Village, Tanjung Medan District, Rokan Hilir Regency. The method used in this study was a survey method by directly observing the catch of bubu and then identifying the type of fish, the number of individuals, and the weight of the fish. The results showed that the main catches were two types of fish, namely Kissing gourami (Helostoma temminckii) totaling 30 individuals, and Ompok hypophthalmus totaling 24 individuals. Bycatch caught were 8 types of fish with a total of 47 individuals
subject: Articles
  topic: section
subject: Bycatch
  topic: keywords
subject: Main catch
  topic: keywords
subject: Bubu
  topic: keywords
creator: Robby Septian
creator: Isnaniah Isnaniah
creator: Arthur Brown
rights: Copyright (c) 2023 https://creativecommons.org/licenses/by/4.0
date: 2023-05-02
publication date: 2023-05-02
starting page: 36
ending page: 41
doi: 10.31258/tromes.1.02.36-41

Isolation of the Fungus on Mantis shrimp (Squilla mantis) Trafficked at the Fish Quarantine Station for Quality Control of Fishery Products Safety (SKIPM) Pekanbaru
type: item
description: Mantis shrimp as one of the foods that come from the sea and ponds is not immune from disease infection, one of which is infection by fungi. Mantis shrimp (Squilla mantis) is one of the crustaceans that has a physical shape resembling a praying mantis. This research was conducted on January– February, 2022 at the Fish Quarantine Station for Quality Control and Safety of Fishery Products (SKIPM) Pekanbaru, Riau. The research method used is the survey method. Mantis shrimp samples came from Bengkalis which were trafficked at SKIPM Pekanbaru. The results of the incubation in the first isolation stage that have been overgrown with fungi, then the purification stage is carried out. The fungus that grows is carried out in the staining stage to make it easier to observe the fungus under a microscope. Furthermore, the identification of fungi in mantis shrimp using a microscope and referring to the book Identifying Filamentous Fungi. The results showed that there were 2 types of fungi, namely Fusarium sp. and Penicillium sp
subject: Articles
  topic: section
subject: Disease
  topic: keywords
subject: Isolation
  topic: keywords
subject: Fungi
  topic: keywords
subject: Manthis Shrimp
  topic: keywords
creator: Anggi Rohita
creator: Feli Feliatra
creator: Dini Suwandari
rights: Copyright (c) 2022 https://creativecommons.org/licenses/by/4.0
date: 2022-05-10
publication date: 2022-05-10
starting page: 32
ending page: 35
doi: 10.31258/tromes.1.1.32-35

Using Rhizhopora apiculata Extract for Mosquito Larvae Control
type: item
description: Temephos is the most commonly used synthetic larvicide to control vectors of several diseases. Currently in some areas there has been resistance of larvae to temephos, so natural larvicides are needed as an alternative. Rhizophora apiculata contains flavonoid compounds that are respiratory toxins to some larvae. This research was conducted in March - Juny 2022, to determine the inhibitory of mangrove extract against mosquito larvae in brackish water. Samples were collected from the Bakar Bakau Dumai, Riau Indonesia. The experiment was setted in a single factor experimental design. Mangrove leaves are finely ground and kneaded while mixed with water and deposited for 6 minutes and filtered. This extract solution was mixed with brackish water to obtain a test medium of 500 l with a concentration of 6 (a1), 9 (a2) and 12% (a3), positive control or 1 g of abate powder (a4) and negative control or brackish water (a0). A total of 20 mosquito larvae were put into the media and their mortality was observed at 0, 15, 30, 45 and 60 minutes after introduction. The mortality of larvae were then analyzed using probit analysis to obtain LC50 (Lethal Concentration 50) and LT50 (Lethal Time 50) values. R. apiculata extract is toxic to mosquito larvae, where larval death has been seen since 15 minutes and continues until 60 minutes after introduction. At the 60th minute the mortality rate is as follows; a1 (60 %), a2 (80 %), a3 (100 %), a4 (100 %), and a0 a1 ( %). Based on the results of the above probit values ​​in the LC50 and LT50 tests on R. apiculata leaves, the LC50 value is 9,732 while the LT50 value is estimated at 21,217
subject: Articles
  topic: section
subject: LT50
  topic: keywords
subject: LC50
  topic: keywords
subject: Mosquito Control
  topic: keywords
subject: Mangrove Extract
  topic: keywords
subject: Larvacide
  topic: keywords
creator: Soni Sanjaya
creator: Irwan Effendi
creator: Nursyirwani Nursyirwani
rights: Copyright (c) 2022 https://creativecommons.org/licenses/by/4.0
date: 2022-11-15
publication date: 2022-11-15
starting page: 25
ending page: 31
doi: 10.31258/tromes.1.1.25-31

Survival Rate Lemon Fish (Rachycentron canadum) Larvae in Lampung Marine Aquaculture Center
type: item
description: Cobia fish (Rachycentron canadum) is one of the marine carnivorous fish that is relatively new and has the potential to be cultuvited. This study aims to determine the effectiveness of larval rearing and nursery cobia fish found in the Center for Marine Aquaculture (BBPBL) Lampung. Held 20 January to 19 February 2021. The mature fish were mated in a 2x2x1 m concrete tank filled with 4,000 L of water. The eggs produced were harvested using an egg collector, counted and hatched in a 0.8x0.6x0.5 m aquarium. After hatching, the larvae were moved into nursery tanks with a density of 5-7 fish/L. Larvae were reared until they were 25 days old and fed naturally with Branchionus sp, Nannochloropsis sp, and artemia. The larvae were then counted, weighed, measured, graded and their growth analyzed. The results of this study showed that not all of these cobia eggs were fertilized by male cobia sperm at the time of spawning. Spawning was carried out on January 16, 2022. Total eggs was 648,000, total fertilized eggs was 480,000 and fertilization rate was 74.04 %. The results of the initial larval count were 75,000, 17,040 were harvested with a survival rate of 22.72%. Water quality (pH, DO, temperature, salinity, nitrite and ammonia) during the research was still normal.
subject: Articles
  topic: section
subject: Lemonfish
  topic: keywords
subject: Cobia
  topic: keywords
subject: Growth
  topic: keywords
subject: Survival Rate
  topic: keywords
subject: Larva
  topic: keywords
creator: Tengku Rany Oktaviany
creator: Suryadi Saputra
creator: Irwan Effendi
creator: Ummi Mardhiah Batubara
rights: Copyright (c) 2022 https://creativecommons.org/licenses/by/4.0
date: 2022-11-10
publication date: 2022-11-10
starting page: 18
ending page: 24
doi: 10.31258/tromes.1.1.18-24

Endangered Shark Species Identified in Bintan Island Waters, Riau Island Province, Indonesia
type: item
description: Shark is one of the fish caught and traded around Bintan Island, Indonesia. There are at least 13 species of shark and of which there are 3 species that are already in endangered status. This research was conducted from January 2 to June 30 at the Padang Coastal Marine Resources Management Center (PCMRMC), Tanjung Pinang Work Unit. The purpose of this study was to identify the species of deep shark whose population is critically endangered and endangered in the waters around Bintan Island, Riau Island Province, Indonesia. Shark identification is done by observing the shark's physical body in whole or in part. Includes color, fin shape, tooth shape, motif. A number of 3 critically endangered and endangered shark species were identified from Bintan Island waters, namely the scalloped hammerhead (Sphyrna lewini Griffith & Smith, 1834), zebra shark (Stegostoma tigrinum), and sandbar shark (Carcharhinus plumbeus). All of these sharks are still caught, consumed and traded in this area. According to the IUCN, the current population conservation status of them is critically endangered (scalloped hammerhead), and endangered (zebra shark and sandbar shark).
subject: Articles
  topic: section
subject: Catch
  topic: keywords
subject: Trading
  topic: keywords
subject: Identification
  topic: keywords
subject: Shark
  topic: keywords
creator: Mutia Dhiya Amani
creator: Rika Permata Sari
creator: Irwan Effendi
rights: Copyright (c) 2022 https://creativecommons.org/licenses/by/4.0
date: 2022-11-07
publication date: 2022-11-07
starting page: 8
ending page: 17
doi: 10.31258/tromes.1.1.8-17

Population Growth and Chlorophyll Content of Spirulina platensis Fertilized with Azolla microphylla
type: item
description: Spirulina platensis is a marine microalga that has potential as a natural fish feed and is considered an absolute food supplement to combat malnutrition in some countries. Azolla microphylla is a water fern that has been cultivated, contains high protein, grows quickly and is widely found in tropical waters. This study analyzed the effect of liquid fertilizer of A.microphylla on population growth and chlorophyll content of S. platensis. A completely randomized design (CRD) was used and the treatments were A (3 mL/L), B (5 mL/L) and C (7 mL/L), D (negative control without liquid fertilizer) and E (positive control, addition of 1 ml/L Walne fertilizer). The measurement results showed that the water quality during the study was in good condition, the water temperature ranged from 28-29 C, pH (7-8) and salinity (25 - 26 ppt). The highest population density level of S. platensis (321,500 cells/mL) was recorded in treatment B. Then followed by treatment D (270,600 cells/mL), treatment C (260,000 cells/mL), treatment A (220,000 cells/mL) and treatment E (150,000 cells/mL). The highest chlorophyll content was found in treatment C of 0.362 g/L, treatment D (0.302 g/L), treatment A (0.182 g/L), treatment B (0.250 g/L), and treatment E (0.072 g/L).
subject: Articles
  topic: section
subject: Liquid Fertilizer
  topic: keywords
subject: Macrophites
  topic: keywords
subject: Organic Fertilizer
  topic: keywords
subject: Microalgae
  topic: keywords
subject: Water Fern
  topic: keywords
creator: Muhammad Aliv Kusuma Putra
creator: Irvina Nurrachmi
creator: Irwan Effendi
rights: Copyright (c) 2022 https://creativecommons.org/licenses/by/4.0
date: 2022-11-08
publication date: 2022-11-08
starting page: 1
ending page: 7
doi: 10.31258/tromes.1.1.1-7