Mangroves are important ecosystems that contain various bioactive compounds. Rhizophora mucronata is one of the potential mangrove species, but information on the content of active compounds in its leaves is still limited. This study aims to identify secondary metabolite compounds in ethanol extract of Rhizophora mucronata leaves through qualitative phytochemical tests. The research was conduct…
This study was conducted to identify the types and potential of anoxygenic photosynthetic bacteria (ABF) from Dumai waters, Riau Province as biodegradation agents of solar oil. The study was conducted from January to March 2025. Sea air samples were taken from three different stations in Dumai waters reflecting the port, estuary, and industrial areas, using a purposive sampling method. The proc…
This study was conducted to identify the content of secondary metabolite compounds in the leaf extract of Lumnitzera racemosa, which has potential as a natural antibacterial agent. Leaf samples were collected from the mangrove area of Pecinta Alam Bahari (PAB) Dumai City and extracted using 96% ethanol through a maceration method. Phytochemical tests were conducted qualitatively on seven groups…
Noni leaves (Morinda citrifolia L.) are a promising alternative plant protein source for aquafeed due to their relatively high crude protein content (15%– 22.11%). However, their high crude fiber content can reduce nutrient digestibility, necessitating appropriate processing to enhance their nutritional value. This study evaluated the effects of incorporating Rhizopus sp.-fermented noni leaf …
Striped Catfish maintenance media often experience water quality problems. Effortsto overcomewater quality problemscan usepapayaleaves(Carica papaya). Zeolite can be added as a water filter in the maintenance media. One of the water quality parameters that must be maintained is the physical parameters, temperature, turbidity, DHL, TDS, and TSS. This research was conducted from April 2024 to Feb…
Communication is a process involving two or more people to form or exchange information with each other. Pulau Terap Village is one of the villages that conducts floating net cage (KJA) fish farming. The problem faced by farmers is poverty, so they need patrons to conduct farming. The existence of a communication pattern in the working relationship between patrons and farmers can help the econo…
Tiger grouper fish farming is an activity that can be developed on Mentawai Island. This study aims to analyze the investment of tiger grouper fish business, Analyze the benefits and revenues and feasibility of tiger grouper fish farming business in Sikakap Village, Mentawai Islands Regency. The method used in this study is a descriptive approach with quantitative analysis of various factors th…
The development of the Lumban Bul Bul Beach tourist attraction does not only depend on the natural beauty and existing infrastructure, but also on the perception and support of the community. Communities have an important role in preserving nature and culture, as well as being hosts for visiting tourists. This study aims to determine the existing conditions and public perceptions of the develop…
This study aimed to determine the effect of substituting wheat flour with lindur mangrove-fruit flour on the qualityof onion cakes (color, aroma, taste, and texture), to identify the optimal substitution level that met the desired quality standards, and to examine the nutritional composition and characteristics of lindur mangrove-fruit flour as well as its impact on onion-cake quality. The expe…
This study aimed to determine the effect of adding seaweed flour on the quality characteristics of otak-otak made from white-lipped eel catfish, and to identify the optimal concentration of seaweed flour for those characteristics. The experiment used a non-factorial Completely Randomized Design (CRD) with four treatment levels: A0 (0% seaweed flour), A5 (5%), A10 (10%), and A15 (15%), each repl…
This study aims to determine the effect of adding agar-agar flour on the quality of biang fish sausage (Ilisha elongata) and to obtain the best addition of agar-agar flour on the quality of biang fish sausage (Ilisha elongata). The method used in this study is an experimental method, namely conducting an experiment to process biang fish sausage with the addition of agar-agar flour. The design u…
This study aims to estimate the stock of bigeye tuna at the Bungus Oceanic Fishing Port (PPS Bungus) over a six-year period (2018–2023) using surplus production models (Schaefer and Fox). The methods used include observation, primary data collection through interviews, and secondary data from logbooks and annual reports of PPS Bungus. The analysis results show that the Fox model is more suita…
Seagrass beds are one of the ecosystems that have many functions, especially for marine biota such as bivalves. The high exploitation of bivalves and the degradation of seagrass beds which are bivalve habitats can affect the composition and density of bivalve species associated with seagrass beds. This study aims to determine the type and density of seagrasses, the type and density of bivalves,…
This research aims to determine the types of fish caught in Lake Sepunjung and in the Artificial Habitat equipment at Lake Sepunjung, Rantau Baru Village, Pangkalan Kerinci District, Pelalawan Regency, Riau Province. This research was conducted in January-March 2024 in Lake Sepunjung, Rantau Baru Village, Pangkalan Kerinci District, Pelalawan Regency, Riau Province. This research was carried ou…
Carp reared in salinity media experience changes in the osmoregulatory system that can have an impact on organ performance, especially the intestines and kidneys. One of the efforts to increase the immune system of fish is by giving natural immunostimulants such as guava leaf flour. This research was conducted in August-October 2024 at the Biotechnology Laboratory, Faculty of Fisheries and Mari…
Raising striped catfish (Pangasianodon hypophthalmus) in dark conditions with low salinity (5 ppt) can support growth but may also cause stress and affect blood health. Adding Cosmos caudatus leaves, which contain natural bioactive compounds, in fish feed could offer a natural way to help boost the immune system. This study aimed to understand the hematological response of fish toward the C.cau…
Kampar Kanan river is the habitat of gadih fish. This fish is a native fish in highland waters whose numbers and presence are decreasing in nature. This is caused by changes in environmental conditions in their natural habitat and overfishing. Food is an important factor for fish life because it can help determine the area where fish are distributed and also can be used to monitor the number of…
The Faculty of Fisheries and Marine Sciences, University of Riau reservoir gets water from the butterfly bridge and small ditches. However, in the area around the butterflybridge, manyhumanactivitiesprovide nutrientsto thewaterand asaresult affect the trophic status. To determine the trophic status based on the Trophic Index (TRIX), the study was conducted in February-March 2025. There were 3 s…
The Bukit Batu River estuary in Bengkalis Regency is a wood cutting litter disposal area, a transportation route for timber-carrying barges and surrounding human activities, which has the potential to increase the content of organic matter in sediments. This research aims to determine the content, type of sediment fraction, distribution of organic matter in sediments and the relationship betwee…
Penelitian ini dilaksanakan pada bulan Desember 2024 sampai dengan bulan Februari 2025 di Desa Kedabu, Kabupaten Kepulauan Meranti, yang berbatasan langsung dengan Selat Malaka dan rentan terhadap pencemaran laut. Lokan (Geloina erosa) digunakan sebagai bioindikator untuk mengkaji jenis dan kandungan mikroplastik di ekosistem mangrove. Tujuan dari penelitian adalah menganalisis perbedaan kelimp…