Jurnal Sumberdaya Akuatik Indopasifik

Community Structure and Mangrove Canopy Cover in the SFV (Smart Fisheries Village) Area of West Pasaman

Aldi Rizki Walqodra — 2024-12-08

Mangrove forests are tropical and subtropical coastal vegetation communities that can grow and develop in muddy coastal intertidal areas. This study aimed to identify and analyze the structure and canopy cover of mangrove ecosystems in SFV (Smart Fisheries Village). The research was conducted using a survey method. The observation station was determined by purposive sampling method. Data analysis was done using descriptive statistical methods. Mangroves in SFV (Smart Fisheries Village) West Pasaman are Avicennia marina, Rhizophora apiculata, Sonneratia alba, and Aegiceras corniculatum. The highest density of mangrove trees, saplings, and seedlings are 500 Ind/ha, 3866.67 Ind/ha, and 66666.67 Ind/ha with mangrove species Rhizophora apiculata. The highest frequency of tree category species with Rhizophora apiculata species is at stations 1, 2, 3 and Soneratia alba at stations 1 and 3. The highest frequency of seedling category species is Rhizophora apiculata at all three stations, Soneratia alba at station 3, and Avicennia marina at station 2. The highest frequency of seedling category species at all three stations is Rhizophora apiculata and Soneratia alba at station 3. The highest mangrove species cover is Rhizophora apiculata at stations 1 and 2 with a value of 68.04% (station 1), 69. 81%, (Station 2), and Soneratia alba 50, 35%, (Station 3) The index of important value (INP) of mangroves at the level of trees, saplings, and seedlings is highest in the species Rhizophora apiculata successively at all stations The value of diversity index (H') is categorized as low, while the dominance index is categorized as moderate. The percentage of mangrove canopy cover is classified as mild.

Ecology and Dimensions of Mangrove Sustainability Management (Case Study of Guraping Ecotourism, Tidore City, North Maluku)

Rustam Effendi Paembonan — 2024-12-08

The mangrove ecosystem is a potential coastal and marine area that has a very important resource function. The mangrove ecosystem must be managed sustainably so that it can provide optimal benefits, especially the mangrove ecosystem in Guraping Village which has been designated as an ecotourism area. The aim of this research is to analyze the ecological condition of the mangrove ecosystem and analyze the dimensions of sustainable management of the mangrove ecosystem in Guraping Village. The method used in this research line transect method with a 10x10 meter quadrant to determine ecological conditions. Interviews were conducted with key respondents from stakeholders and the dimensions of sustainable management were analyzed using Rapfish. Measurement of environmental parameters directly on site. The results obtained from this research can determine the ecological condition of mangroves at the research location which still have good status based on the number of species, species density, species cover, diversity index, mangrove canopy cover data. The calculation of the results of the assessment of the dimensions of mangrove sustainability management, which consists of ecological dimensions, economic dimensions, socio-cultural dimensions, legal, institutional and policy dimensions and technological and infrastructure dimensions, is classified as a less accountable level category.

Comparison of the performance juvenile sandfish, Holothuria scabra fed Ulva and Sargassum

Pitjont Tomatala — 2024-11-29

Sandfish (Holothuria scabra) are one of the economically important marine animals found in the coastal of the Kei Islands (Tual City and Southeast Maluku Regency). The large exploitation pressure caused the sandfish population in the Kei Islands to decline drastically. This problem can be overcome by farming activities (greeding, nursery and grow-out). Nursery is an important segment in the farming series because through nursery the seeds are prepared to a size that good for rearing in grow-out containers or restocking into nature. This research aims to see the effect of giving Sargasum sp and Ulva sp extracts on the growth and survival of sandfish juveniles. This research doing from August – September 2022 at the Tual Teripang Center, Ohoitel village, Tual City. Juvenile sandfish used as research objects size 3 – 6 mm and stocking density is 40 individu per container. The feed used as treatment was Ulva sp extract 50 g/container (treatment A) and Sargasum sp extract 50 g/container (treatment B). Feeding is done every day and water changes are 70-100% per day. The calculation of growth and survival rate is the variable that observed in this study. The average absolute growth in body length in treatment A was 0.69 mm and in treatment B was 1.72 mm. Through the T test on growth, it was obtained that P_value (0.0006) < α (0.05) which means that the two treatments had different effects on juvenile growth. For survival, the average percentage for Treatment A was 40% and Treatment B was 62.5%. Through the T test on survival, it was obtained that P_value (0.0048) < α (0.05) which means that the two treatments had different effects on the survival of juvenile sea cucumbers. It was concluded that treatment B was better for the growth of juvenile sandfish than treatment A.