Jurnal Ilmu dan Teknologi Kelautan Tropis
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Cu AND Pb CONCENTRATIONS IN WATER COLUMN AND PLANKTON OF DOWNSTREAM SECTION OF THE MUSI RIVER
Get PDFA wide range of the Musi river usage such as agricultural, forestry, industry, residential, fishing and transport activities has created a heavy metal pollution isues. This research aims to know the concentration of Cu and Pb in the water column (suspended and dissolved) and also on planktons found at downstream of Musi River. Water and plankton sampling was carried out in January and May 2015 across five research stations. Cu and Pb in water and plankton samples were analyzed using the USEPA 30050B method determined by using AAS SpektrAA plus variant with air mixure flame – acetylene. The average concentration of dissolved Cu and Pb were varied from 0.003-0.005 mgL-1and 0.002-0.004 mgL-1, respectively. A higher value was observed during the suspended phase which came to around 8.60-31.79 mgKg-1 for Cu dan 21.23-61.5 mgKg-1 for Pb. Furthermore, Cu and Pb concentration in plankton were varied from 1.046-2.430 mgKg-1 and 0.673-1.283 mgKg-1, respectively
PRELIMINARY STUDY OF LARVAL DEVELOPMENT Oryzias javanicus IN INDONESIA
Get PDFJava medaka Oryzias javanicus potentially developed as test organism, represents the coastal region because it has a high adaptability in freshwater, brackishwater and marine environments. Utilization of it as a test organism has some obstacles such as lack of number of test organisms with same size or age. The fulfillment of number can be solved if the test organism is cultivated exclusively in the laboratory. This study was a preliminary study to get information about suitable salinity for spawning and hatching. Parameter observed were spawning ability in 0 and 20 ppt and hatching rate of egg among 0. 15 and 30 ppt and development of larval fish in 0 ppt. Result indicated that the fish was be able to spawn in 0 and 20 ppt. Eggs were hatched within 9 days in 30 ppt, faster than in freshwater and 15 ppt. In general, O. javanicus was be able to spawn either in freshwater or seawater, but there are differences in the behavior of fish in the laying of egg. Fish will carried their eggs in the abdomen in freshwater, while 20 ppt salinity fish tends to release the eggs. O. javanicus be able to live and lay eggs on freshwater and seawater. Selection of salinity is adjusted to test requirement in egg phase, pascalarva or adult. In general, breeding of fish easier and faster done in fresh water while hatching eggs take place more quickly in high salinity.Keywords: Indonesia, Java Medaka, Oryzias javanicus, test organis
CARRYING CAPACITY OF EAST BEACH OF BULUKUMBA REGENCY FOR MARINE TOURISM ACTIVITIES
Get PDFThe purpose of the study was to assess the carrying capacity of East Beach of Bulukumba Regency for tourism activities. East Beach was obtained three marine tourism activities namely beach tourism of recreation, snorkeling and diving. Coastal tonamelyurism/recreation categories according to the total length area that utilized around 1.696 m can accommodate 68 people/day, snorkeling tourism around 71.605 m² can accommodate 286 people/day and diving tourism around 98.534 m² is able to accommodate 394 people/day. Thus the total tourist that can fit to the overall tourism activity around 748 people/day. Keywords : carrying capacity, marine tourism, east beach, Bulukumba regenc
POPULATION BIOLOGY OF MUD CRAB Scylla serrata - Forsskal, 1775 IN MANGROVE ECOSYSTEM OF SUBANG DISTRICT, WEST JAVA
Get PDFThe study of population biology of mud crab Scylla serrata is necessary to analyse the population dynamics, such as growth of crabs, size distribution, mortality and exploitation rates of S. serrata. Population biology data collection was carried out from March to June 2016 at estuary and silvofishery areas of three stations (Mayangan, Tanjung Tiga and Blanakan villages). Data were analyzed using analytical methods of FISAT-II (FAO-ICLARM Stock Assessment Toool II)instruments. The results showed the growth of S. serrata male in Subang distric was positive allometric and the female was negative allometric. Growth coefficient (K) ranged from 0.21 to 0.43 in the estuary and from 0.28 to 0.89 in silvofishery area. Exploitation rate in the silvofishery area has been above the maximum exploitation rate. The size distribution of S. serrata in Subang district has the highest frequency at class interval of 106-110 mm (male) and of 101-105 mm. The highest abundance of mature female crabs is in May.Keywords : population biology, Scylla serrata, Subang Distric
CONTAMINATION OF Cd AND Pb ON MILKFISH Chanos chanos CULTURED IN SERIBU ISLANDS, JAKARTA
Get PDFSeribu Islands located in the north of Jakarta Bay; it is potentially polluted by heavy metal such as Cd and Pb. The aims of this study is to prove contamination presumption, by analyzing and determine correlation Cd and Pb concentration in the sediment, in the water and on milkfish Chanos chanos cultured in this area. On this study, we collected water quality data (pH, temperature, dissolve oxygen and salinity) and heavy metals contamination (Cd and Pb) in the sediment, in the water and on milkfish. We compare collected data with quality standar and correlate heavy metal concentration between in the water and in the sediment; in the water and on milkfish organ; and, in the sediment and on milkfish organ. In general, water quality is sufficient enough to support the life of farmed milkfish. Cd and Pb contamination level in the water lied below the quality standard of Ministry of Environment decree No. 51/2004 in the last April and July. However, the contamination exceeds the standard in the last October. The contamination in sediment lied below RNO (1981), EPA (1999) and IACD/CEDA (1997). Gills, viscera and the meat of the milkfish are contaminated with Cd and Pb, yet, still lied below the quality standard of Ministry of Environment Decree No. 51/2004. The results showed that farmed milkfish in Thousand Islands are safe to eat. We also found that the correlation of Cd and Pb contamination between water and sediment is positive. The correlation of Cd is much higher than Pb. The correlation of Cd between water and viscera as well as between sediment and viscera are the most closely related than any other organ. Keywords: contamination, Cd, farming, milkfish, Pb, Seribu Island
POTENTIAL FISHING GROUND MAPPING BASED ON GIS HOTSPOT MODEL AND TIME SERIES ANALYSIS: A CASE STUDY ON LIFT NET FISHERIES IN SERIBU ISLAND
Get PDFInformation on the spatial and temporal of fishing activity can optimize a fisheries management and increase their economical and biological benefit. For effective management and good understanding of fishing activities, information about fishing ground is crucial. In this study, we aimed to analyze the spatio-temporal of lift net fisheries in Kepulauan Seribu by analyzing their fishing season, investigating their hotspot of fishing ground using GIS-based hotspot model, and mapping the potential fishing ground of each target species. We found that anchovy and scad could be caught throughtout the year, while sardine and squid had high fishing season in west monsoon. Hotspot of fishing ground of lift net fisheries in Kepulauan Seribu waters generally was concentrated around Lancang Island and in southern part of Kotok Island. Potential fishing ground for sardines was located in around Lancang Island on west monsoon. Squids were highly distributed around Lancang Island in December to January and around Lancang and Rambut Islands in November. Anchovy and scad had more potential fishing ground in around Kepulauan Seribu waters. Keywords: fishing ground, lift net, hotspot, fishing season
UTILIZATION OF MARINE FUNGAL Nodulisporium sp. KT29 METABOLITES TO IMPROVE THE PRODUCTION PERFORMANCE OF MARINE CULTURE OF WHITE SHRIMP
Get PDFThis study aimed to determine the best dose of administration of marine fungal Nodulisporium sp. KT29 metabolites to improve the production performance of marine culture of white shrimp. The experimental animals used were white shrimp Litopenaeus vannamei post larvae 12, which were reared in the sea using floating net cages with a stocking density of 700 post larvae/net. Experimental design used was a completely randomized design consisting of 3 treatments with 3 replications; control without the administration of Nodulisporium sp. KT29 metabolites, dietary of feed containing Nodulisporium sp. KT29 metabolites at doses of 20 mL/kg of feed and 40 mL/kg of feed. The results showed that survival rate, absolute length growth, weight gain, daily growth rate and feed conversion ratio in treatment groups were better than the control (P<0.05). The administration of marine fungal Nodulisporium sp. KT29 metabolites at a dose of 20 mL/kg of feed could improve the production performance of white shrimp cultivated in the sea with survival rate, daily growth rate and feed conversion ratio: 66.61±6.94%, 20.18±0.39 %/day and 3.20±0.22, respectively
PERKEMBANGAN AKTIVITAS ENZIM PENCERNAAN LARVA RAJUNGAN Portunus pelagicus
Get PDFKeberlanjutan produksi larva rajungan Portunus pelagicus telah dilakukan, namun sintasan yang diperoleh belum stabil. Aktivitas pencernaan diketahui sangat terkait dengan jenis pakan yang dikonsumsi larva sehingga berdampak terhadap pertumbuhan dan sintasannya. Enzim amilase, lipase, pepsin dan tripsin merupakan indikator biologis yang dapat menunjukkan kesesuaian jenis pakan yang dikonsumsi larva melalui kemampuannya untuk mencerna. Tujuan penelitian ini adalah untuk mengetahui aktivitas enzim pencernaan pada larva rajungan. Data aktivitas enzim pencernaan yang diperoleh disajikan dalam bentuk grafik dan dianalisa secara deskriptif. Berdasarkan hasil penelitian, aktivitas enzim amilase, lipase dan tripsin mulai terdeteksi pada larva umur satu hari. Pola aktifitas enzim amilase menunjukkan peningkatan sejak larva berumur satu hari hingga hari ketujuhbelas kemudian cenderung menurun sampai akhir penelitian. Aktivitas enzim tripsin tinggi pada hari kesatu, tapi cenderung menurun pada hari ketiga dan kelima, dan meningkat lagi pada hari ketujuh sampai hari terakhir penelitian. Aktivitas amilase dan tripsin tertinggi selama periode waktu tersebut terjadi pada larva umur sebelas hari, sedangkan aktivitas enzim lipase cenderung stabil dari awal sampai akhir penelitian. Aplikasi budidaya, pemberian pakan buatan dengan kandungan karbohidrat, protein dan lemak tinggi sebaiknya dilakukan saat larva berumur sebelas hari
WATERS CARRYING CAPACITY FOR DEVELOPMENT OF SEAWEED CULTURE OF Eucheuma cottonii IN LUWU AND PALOPO DISTRICTS, BONE BAY, SOUTH SULAWESI
Get PDFIn seaweed Eucheuma cottonii cultures, a water carrying capacity is an important factor to optimize the seaweed culture. Carrying capacity can be determined by an ecological footprint production (EFp) analysis. This research was conducted in May 2015 (1st transitional season) and September 2015 (2nd transitional season) in Luwu and Palopo distircts, South Sulawesi. Map and land use were analyzed using GIS (Geographic Information Systems). The result showed that the ecological foot-print production (EFP) in Luwu waters was 67.88 ton/capita/year or equivalent to 235,823.93 tons/ year. However, based on the analysis of the water availability for seaweed was 59,781.79 hectares, it can produce seaweed (biocapacity) for 1,437,779.60 tons/year and the number of farmers that allows for use the waters is 21,432 capita. The ecological footprint production (EFp) in Palopo waters is 3.08 ton/capita/year, or equivalent to 4,589.99 tons/year. Water availability analysis is 1,771. 41 hectares are able to produce seaweed (biocapacity) for 18,287.46 ton/year and the number of far-mers that allows for use the waters is 635 farmers capita. The results comparison between biocapa-ci-ty and ecological footprint, ecological status for Luwu and Palopo waters are still in sustainable use
CORAL REEF ECOSYSTEM MANAGEMENT IN AREA OF EASTERN COASTAL WATER CONSERVATION WEH ISLAND SABANG
Get PDFCoral reef ecosystem is important for coastal resources.Damage of Coral reefs resulted in de-gradation of population and fishes reef diversity. The East coast ofWeh Island in Sabang designated as conversation area that has aim to keep coral reefs from destructive utilization activites.The purpose of this study was to know the status of coral reefecosystemsmanagement in marine protected areaEast CoastWeh Island, Sabang and to analyze theattributessensitivelyfromthedimension ofecological,socio-economicand institutional sector.The methodthat used toknow the statusof the sustainablemanagementis RAPFISHanalysis.Dimensions oftheecologycan be known by measuring the coral growth used thePointInterceptTransect,reef fishabundanceusedUnderwaterVisualCensusFishmethod.Socio-economicand institutionaldimensionswill be collected through Focus Group Discussion(FGD) and help by questionnaires.Management status of coral reef ecosystems in the region of the East coast Weh islandmultidimensionallyindicatesthat it was quitesustainable.The most sensitiveattributeofthe managementisthe growth ofsaplings ofcorals,reef fishabundance,conflicts betweenfishermen,the public perceptionagainstthe abundance of fish, the role of the community, and the fishingmanagements