Portal Jurnal Ilmiah Sekolah Tinggi Ilmu Pertanian (STIP) Wuna Raha
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Sea urchins in the intertidal zone on Karanrang Island, Pangkep Regency; Density, abundance, community structure, and distribution patterns
No full textSea urchins were ecologically and economically important biota, but scientific information on sea urchins is still very minimal and there is no ongoing monitoring. The purpose of this study was to determine the density, abundance, community structure, and distribution patterns of sea urchins in the intertidal zone of Karanrang Island, Pangkep Regency. The research in June-July 2022 was carried out at high and low tide using three transects measuring 1 x 1 m consisting of four plots measuring 50 x 50 cm. Determination of stations based on information from local residents to get observation stations based on tidal conditions. The results showed that three species of sea urchins from two families were found, namely Diadema setosum, Echinothrix calamaris, and Tripneustes gratilla. The species of D. setosum was found to be very abundant (97.3-97.6%) and tended to be more abundant during high tide than during low tide. The index of diversity and uniformity of porcupine species is low (H' = 0.130-0.142 and E = 0.118-0.129). The species dominance index was in the range of 0.946-0.953 indicating high dominance of D. setosum. Spatially, D. setosum had a uniform distribution pattern, whereas E. calamaris and T. gratilla were distributed in clusters. Further spatial and temporal research is needed to comprehensively determinant the conditions of the sea urchin population on Karanrang Island, Pangkep Regency
Income analysis of hand line fishermen in Banawa Village, South Yapen District, Yapen Islands Regency, Papua Province
No full textThe purpose of this study was to determine fishermen's income using hand line fishing gear in Banawa Village using primary data for 50 respondents representing the entire population of the Fisherman Community in Banawa Village. Data collection was carried out using interviews and documentation methods. The analytical method used is descriptive quantitative. The collected data is processed and presented in tabular form. The study results show that the fishing community in Kampung Banawa still needs a higher understanding of knowledge and technology. This has not reduced the enthusiasm of fishermen in Kampung Banawa to go to sea actively, even though the price of fish in the market could be better. There are differences between hand-line fishermen based on the boat used. Hand line fishermen with rowing boats earn Rp.70,000/week, hand line fishermen using ketinting engine boats Rp.120,000/week, and hand line fishermen using 15PK outboard motors make Rp.200,000/week. Institutions supporting fishermen's income include Fishery Cooperatives, Banking (BNI), and fish markets
Analysis of priority locations for the development of Fishery Ports in the Southern of Java Island
No full textFishing port has a strategic role to encourage the development of the fishing industry and generate a regional economy. In the spatial plan, a fishing port is one of the forms of spatial structures, and the zoning plan has a Fishing Port Zone for the working and operation of the fishing port area. The aim of this study is to determine the priority fishing ports in the South of Java Island which will be developed and accommodated in the zoning plan and spatial plan policies within the framework of regional development. The method used in this study is to perform weighting and scoring analysis on criteria and sub-criteria based on the physical aspects, disaster, accessibility, spatial planning and space utilization, fishery, and prospect estimation. The result of this study concludes that the priority fishing port locations that can be further developed, namely: PPN Prigi, PPS Cilacap, and PPN Palabuhan Ratu
The enlargement of painted spiny lobster (Panulirus versicolor) uses different feed ingredients
No full textDevelopment of lobster cultivation activities in Muna regency relatively not optimal. Availability of feed is be expected to be an obstacle in the development of lobster cultivation. This Research aims to determine the effect of feed ingredients on growth and survival of spiny lobster (Panulirus versicolor). The Research was conducted in December 2017 to March 2018, located in Bahari Village, Towea District, Muna Regency, Southeast Sulawesi Province using a randomized block design with three levels of feed ingredients treatment namely treatment A = blood clam meat, treatment B = white shrimp and treatment C = trash fish. The results showed that the highest specific growth rate was obtained in treatment A which was 1.69 ± 0.09 %/day, then treatment C (1.13±0.09 %/day), and the in lowest treatment B (1.09±0,06 %/day). The highest absolute growth was obtained in treatment A of 606.67 ± 15,28 g/individual then treatment C was 336.67±15,28 g/individual and the lowest was in treatment B of 300.00±10.00 g/individual. Survival of sea lobster is 100% in all three treatments. Analysis of variance at the 95% confidence level (α0.05) showed that different feed ingredients had a significantly different effect on the daily growth rate, and the absolute growth of sea lobsters (P. versicolor)
Analysis of shoreline changes on the northeast coast of Nunukan Island, Nunukan Regency, North Kalimantan Province
No full textThis study aimed to analyze changes in the coastline in the Northeast of Nunukan Island, North Kalimantan Province and to determine the area in the Northeast of Nunukan Island, North Kalimantan Province, which experienced changes in the coastline. This research was conducted in February - March 2022 on the Northeast Coast of Nunukan Island, North Kalimantan Province. The type of data collected is satellite imagery for the last 6 years, 2017-2022. Data were analyzed using GIS software with cropping, radiometric correction, geometric correction, image enhancement, shoreline digitization and overlay methods. The results showed that the rate of change of the eastern coastline of Nunukan Island in 2017 was 13,457.91 m long, 2018 was 14,266.82 m long, 2019 was 14,787.25 m long, 2020 was 14,762.21 m long, 2021 was 15,369.23 m long, and in 2022 it is 15,968.22 m. The area that has experienced a change in coastline on Nunukan Island, North Kalimantan Province, namely in 2017 covering an area of 21.70 ha, in 2018 covering an area of 22.27 ha, in 2019 covering an area of 23.34 ha, in 2020 covering an area of 23.74 ha, in 2021 covering an area of 24 .26 ha and in 2022 it will be 32.82 ha. This study concludes that the area of change in the coastline has changed significantly from 2017 to 2022
Status of mangrove ecosystems in the waters of Senggarang Besar, Tanjungpinang City, Riau Islands Province
No full textThe waters of Senggarang Besar are located in Senggarang Village, Tanjungpinang Kota District. The waters of Senggarang Besar have a fairly large mangrove ecosystem plus many mangrove seedling planting activities in the coastal waters of Senggarang Besar. Mangrove ecosystems have a variety of natural resources that are abundant and diverse. Mangroves are the most potential ecosystems because mangroves support the diversity of flora and fauna in aquatic communities and play a significant role in human survival based on economic, community and environmental perspectives. This study aims to determine the density, canopy cover, and status of mangrove ecosystems in the waters of Senggarang Besar. This research was conducted in September-December 2022 located in the waters of Senggarang Besar Tanjungpinang City, Riau Islands Province. Determination of observation stations using direct survey method in the field with 3 station points with 6 plots at each station, based on the presence of mangrove ecosystems. Determination of the retrieval point using purposive sampling method. Mangarove ecosystem species found in the waters of Senggarang Besar Tanjungpinang City Riau Islands Province there are 4 species including: Rhizophora apiculata, Bruguiera gymnorhiza, Xylocarpus granatum, and Avicenia marina. With density and cover values at station 1, 3900 ind/ha and 81.00%, at station 2, 1433.33 ind/ha and 69.98%, and station 3, 1446.7 ind/ha and 69.08%. The level of damage to the mangrove ecosystem in the waters of Senggarang Besar Tanjungpinang City, Riau Islands Province at station 1 includes good, very dense criteria based on KepMen LH No. 201 of 2004. While at stations 2 and 3 the level of damage includes good, moderate criteria based on KepMen LH No. 201 Year 2004
Mangrove community structure in the waters of the Beladeng River Estuary, Dompak Village, Tanjungpinang
No full textThe waters of the Beladeng River Muara is one of the areas in the Dompak Tanjungpinang Sub-District which has quite large potential for mangrove ecosystems. To maintain the condition of the mangrove ecosystem, it is necessary to know the structure of the mangrove community itself. The purpose of this study was to determine the types of mangroves and the structure of the mangrove community which includes the level of species density, species frequency, species closure, importance value index and mangrove canopy cover in the waters of the Beladeng River estuary, Dompak Tanjungpinang Village. This research was conducted in April-December 2022 using the Purposive Sampling method with 3 stations. In observing the mangrove ecosystem using the Transect Line Plot method measuring 10x10 m2. Based on the results of the study, there were 3 types of mangroves found, namely Rhizophora apiculata, Xylocarpus granatum, and Brugueira gymnorhiza. Meanwhile, the mangrove community structure obtained the highest density at station 3 with a value of 4733.34 ind/ha. At station 1, the types of Rhizophora apiculata and Xylocarpus granatum received the same frequency values, and the highest IVI was achieved by Xylocarpus granatum. At station 2 the highest species frequency values were found in 2 species, namely Xylocarpus granatum and Rhizophora apiculata, and the highest IVI was Rhizhopora apiculata. For station 3, the 3 types of mangroves got the same type frequency value, and the highest IVI was achieved by Rhizophora apiculata. Meanwhile, the highest percentage of mangrove canopy cover was found at station 1 with good and very dense categories
Application of NDVI Transformation on Sentinel 2A Imagery for mapping mangrove conditions in Makassar City
No full textMangrove ecosystems consist of tropical plants that have adapted to the salinity, tidal fluctuations, and loose soil condition. Identification of mangrove ecosystems can be carried out by direct survey methods or by utilizing remote sensing technology. This study aims to map the area, percent cover, and density of mangroves in Makassar City using Sentinel 2A Imagery. The method used is the NDVI transformation, followed by Unsupervised-ISODATA classification, ground check with the 10 x 10-meter plotting method, and hemispherical photography. The results showed that the existence of mangroves in Makassar City was still found in the Tallo and Biringkanaya districts, with 68.81 ha of mangrove ecosystem cover area in the range of 84.36 - 91.89% (dense category). Likewise, the vegetation index based on NDVI analysis ranged from 0.73 - 0.81 (dense category), and the species density was in the range of 2700 - 6400 trees/Ha (dense category). Sentinel-2A imagery transformed with NDVI can be used to track mangrove areas and their density. The wide distribution of mangrove ecosystems in Makassar is relatively small but has good conditions
Abundance and temporal distribution of mullets caught in Merauke City Coastal Waters
No full textThe purpose of this study was to see the abundance and distribution of mullet during the day and night on the coast of Lampu Satu Beach and Payum Beach. This research was conducted in June-August 2020. Determination of the sampling points at the research location using purposive random sampling method. Data analysis used in this research is Relative Abundance (Kr) and Morisita Spread Index (Id). Catches found during the study were 268, with 3 species of mullet, namely Mugil cepalus, Mugil dussumieri and Rhinomugil corsula. During the day, the total number of catches is 148 while at night it gets as many as 120. The highest proportion value of relative abundance was obtained from the two stations, namely Mugil dussumieri species and the lowest was Rhinomugil corsula. The results of the calculation of the morisita distribution index during the day at both stations obtained a value of 1.008 (group). It is also found that at night the two stations get a value of 1.014, which means that at night it is a group category
A study of water depth on the growth and productivity of seaweed Kappaphycus alvarezii
No full textThis study aims to investigate the impact of varying the depth of water on the growth and productivity of seaweed Kappaphycus alvarezii. The study was carried out in the seas of Pallette. The research methodology used in this study incorporates three different planting depth treatments, specifically 1.5 meters, 3 meters, and 4 meters. In each treatment, 50 grams of Kappaphycus alvarezii seeds per bunch were used. The findings of this study indicate that seaweed cultivation at a depth of 1.5 m yields significantly favourable outcomes compared to the treatments conducted at depths of 3 m and 4 m, where growth is comparatively less optimal. This occurrence can be attributed to the diminished level of light penetration at such a depth. There is an inverse relationship between the depth of seaweed planting and the rate of weight gain. The optimal depth for seaweed cultivation for 42 days is 1.5 meters, with an average specific growth rate of 3% daily. On the contrary, the treatment carried out at a depth of 1.5 m showed the most substantial increase in biomass, averaging 122 g. Additionally, the maximum yield of seaweed was observed in the same treatment, precisely measuring 1,208 g/m2