ABSTRACT This research was carried out in March 2022, the location of this research is Pandaratan Beach, Central Tapanuli Regency, North Sumatra Province. The purpose of this study was to determine the abundance, relative abundance, diversity index, dominance index and uniformity index of epizoic diatom species in Pinna muricata in the seagrass ecosystem of Pandaratan Beach. The method used is…
Abstract 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 inhibi…
Abstract The Chaetodontidae family fish is an indicator species because it has a close relationship with coral reefs based on a strong preference for coral stone as the main component of coral reefs. The existence of these fish can be used as a guide to assess and monitor the condition of coral reefs. This study was conducted in March 2022. The purpose of this study was to determine the abunda…
Abstract Research on the vulnerability study of the coastal area of Dumai City, Riau Province. The purpose of this study was to determine the assessment and category of vulnerability levels, as well as to calculate the parameters that affect coastal vulnerability. The method used a survey method with direct observation, while the analytical method used CVI calculation, the root of the multipli…
ABSTRACT This research was conducted in January-June 2022, at Pasumpahan Island, Padang City, West Sumatera. Data analysis was carried out at Chemical Oceanography Laboratory, Faculty of Fisheries and Marine, University of Riau .This research aims to determine the type of sediment composition and organic material in Pasumpahan Island. Sediment was taken using a grab sampler from 4 stations, wh…
Abstract Coral reefs are a unique ecosystem of tropical waters that have physical function as a beach protector with its nature that can reduce the energy of waves moving towards the coast. Coral reef ecosystems are a good places for spawning, nurturing and food sources for fish. The aim of this research was to determine the density of zooxanthella on coral Acropora sp based on different depth…
ABSTRACT This research was conducted in March 2022 located in the Waters of West Dumai City. The study was aimed to examine community structure of the epipelic diatom vertically between stations. The method used in this research was survey method. Epipelic diatom samples were taken using a modified corer, then taken to the laboratory to be identified and the community structure calculated and s…
ABSTRACT The waters of Terkul are related to the strait of Rupat. Around the Terkul area there is an oil and gas industry with transportation, storage, processing and distribution of oil supplies to various regions in Sumatra through ship transportation. This activity causes the waters of the Rupat Strait to be prone to oil pollution. Oil pollution can reduce the quality of the waters and caus…
Abstract Organic matter is one indicator of environmental fertility both on land and at sea. The content of organic matter in a certain amount can be useful for aquatic biota, but if the amount of organic matter exceeds the assimilation capacity of the waters, it can cause a disturbance. This study aims to determine the organic matter content of water and sediment at high and low tide condition…
Abstract One of the tourism areas in Dumai City in Medang Kampai District, which is a coastal area with an area of 373.00 km2. Coastal areas are always used for human activities, one of which is coastal ecotourism which is a coastal tourism activity developed with a conservation approach and utilizing the characteristics of coastal resources as tourist destinations. Medang Kampai District has …
ABSTRACT The purpose of this study was to determine the effect of plastic cover with different colors on the type and abundance of epipelic diatoms. The method used is an experimental method with plastic cover treatment with different colors. This experiment has one factor, namely plastic color, with four levels of treatment, namely no plastic (control), clear, red and black colors. The type o…
ABSTRACT This study aims to determine the distribution pattern and diversity of gastropods in the Intertidal Waters of the Eastern District of Rupat. The study was conducted in February 2022. The study location consists of 3 stations each station was placed 3 transects from the highest tide to the lowest tide with different distances. Along the transect line, 3 plots with a size of 3 x 3 m wer…
Abstract Vaname shrimp (Litopenaeus vannamei) is a type of shrimp that is widely cultivated in Indonesia. Vaname shrimp dominates the breeding business in Indonesia which was previously dominated by tiger shrimp (Penaeus monodon). This commodity transition was supported by the Decree of the Minister of Maritime Affairs and Fisheries No.41/2001 on July 21, 2001 which officially released vaname …
ABSTRACT The main problem in carp cultivation is the occurrence of bacterial infection caused by Aeromonas hydrophilla so that it can cause death. Prevention can be done by giving phytoimmunostimulants derived from mango leaves (M. indica), noni leaves (M. citrifolia), and guava leaves (P. guajava). The purpose of this study was to determine the effect of phytoimmunostimulants on leukocyte dif…
ABSTRACT Pasumpahan Island is one of the islands located in West Sumatra Province which has various activities of daily life especially in the intertidal zone, it is suspected that it can interfere with the existence of aquatic organisms one of which is gastropods. Studying the structure of gastropod communities in the intertidal zone is an interesting natural laboratory to study. This researc…
This research was carried out in September 2021 in the Bintan Coastal Waters located on Mapur Island, Bintan Pesisir Regency, Riau Islands Province. The method used in this study is a survey method, namely observations or observations in the field. To determine the level of utilization and ecological conditions of Sea Grapes in the coastal waters of Mapur Village, Bintan Pesisir District, …
Mangrove damage in Riau Province is caused by excessive logging for charcoal, building materials and firewood. To prevent this impact from continuing to occur, it is necessary to have sustainable management but still prioritize various aspects of balance such as ecological, economic, social and institutional legal aspects. Starting from this, it is necessary to examine the problems that will be…
Sea cucumbers are included in one of the marine biotas with high economic value and export commodities with health benefits. Based on research that has been done, sea cucumber H. Atra has antibacterial activity and toxic activity against cancer cells. The ability of sea cucumbers in the health sector is related to the metabolic compounds contained, one of which is saponins. The purpose of …
Snakehead fish (Channa striata) is one of the freshwater fish with high economic value and much favored by the public because it has a meaty texture and a savory taste. Snakehead fish are often found in nature such as swamp waters. But now snakehead fish have been widely cultivated with media in the form of tarpaulin ponds. Pond raised snakehead fish and wild sources has a habitat with differen…
Mantis shrimp is one of the crustaceans that has a physical shape resembling a praying mantis (manthis), in the processing process it will produce waste in the form of carapace and heads which have the potential to be utilized, one of which is the manufacture of chitosan. In general, the purpose of this study is to obtain the potential of chitosan carapace of mantis shrimp (Harpiosquilla r…