1. International Seminar Fisheries and Marine Industrialization 2012
https://repository.unri.ac.id/handle/123456789/5607
2024-03-29T15:28:43ZImpact Of Detergent Waste On Survival, Growth, And Histiphatology On Nile Tilapia (Oreochromis Niloticus) Culture
https://repository.unri.ac.id/handle/123456789/8191
Impact Of Detergent Waste On Survival, Growth, And Histiphatology On Nile Tilapia (Oreochromis Niloticus) Culture
Yosmaniar; Setiadi, Eri
Surfactant is active agent in detergent may affect pollution in the water. The purpose of this experiment is to examine the effect of surfactant on growth, survival, and histopathology of gill, kidney, and liver tissues on Nile tilapia (Oreochromis niloticus) culture. The aquarium with 70 x 40 x 45 cm was used. Fish with 8,46 ± 0,1 cm in total length was used. Stock density was 40 fishes per aquarium. The different of surfactant concentration used in this experiment were as follow: A) 1,5 mg/L; B) 3,0 mg/L; C) 4,5 mg/L; and D) 6,0 mg/L. Each treatment consisted of tree replicates. The experiment was conducted for 2 months. The result showed that The highest of survival (98.33 ± 2.89 %) at B treatment was found, and then followed by C, A and D treatments were 90.00 ± 6.61%, 89.17 ± 9.46%, and 89.17 ± 6.29 % (P>0,05), respectively. The body weight (6.5 ± 0.7 g) was the highest at D treatment then followed by B, and C were 5.72 ± 1.54 g, 6.5 ± 1.39 g and 5.06 ± 0.83 g (P>0.05), respectively. The kinds of damaged of gill, kidney, and liver tissue found such as lesion, swelling, vacuolation, blood, and necrosis were observed
2016-04-13T00:00:00ZPlankton And Macrobenthos Density At Multiple Locations Test Of Aquaphonic Application Based On Nile Tilapia (Oreochromis Niloticus) Culture
https://repository.unri.ac.id/handle/123456789/8190
Plankton And Macrobenthos Density At Multiple Locations Test Of Aquaphonic Application Based On Nile Tilapia (Oreochromis Niloticus) Culture
Widyastuti, Yohanna R; Yosmaniar
The aquaponic system is principly a culture technique combining an aquaculture and hydroponic in which fish and plant are reared together in a one system to improve the productivity and benefit of fish culture. In this research, the aquaponic system is made up of nine (9) units of ponds with vegetables substrate as biofilter. Ipomea aquatica ( Kangkung ) used as a economic vegetable in this system. The test used Multiple location of land tophografis which is : a).High, b) midle and c) low land. Differences of land tophografis apparently biodiversity of water plankton and water invertebrate which is important in food chain and ecologis balanced. In this research, plankton and macrobenthos samples taken regulary each week. 4% formaldehide use to conserved sample for laboratoies identification. Species identification, Diversity index (H’) and Heterogeneous species (E) from Shannon-Weaner use as indicator of biodiversity. All data experiment are analyzed descriptively. Nile tilapias (Oreochromis niloticus) were stocked 100/m2, feeted with dry pellet in dosis of 5% to the total biomass, was given two times a day. Fish rearing done on 2 moths. Result shown that plankton species from all test location are similar which is Chlorophyceae dominated the fitoplanton. Zooplanton was found in low number such as Rotifer and Enteromostraca. Plankton density in range of mesotrophic to eutrophic (2000-5000 cel /l). , Diversity index (H’) 0.75-1.57, Heterogeneous species (E)indicated low while Lemnaea sp dominated species of macrobenthos in range of 1 – 6 ind/m2 in size of 2 – 14 cm length. Aquaphonic system be stable at each location.
Key word : multiple location, plankton and macrobenthos
2016-04-12T00:00:00ZAnalysis Of Shoreline Changes Of Bengkalis Island
https://repository.unri.ac.id/handle/123456789/8189
Analysis Of Shoreline Changes Of Bengkalis Island
Abdillah, Yayat; Husrin, Semeidi; Sudirman, Nasir
The island of Bengkalis in Riau province is highly vulnerable against the impact of future sea level rise because of its low lying coastal area. Moreover, actions of waves, currents and human interferences may lead to even faster retreat of the coastlines. The objective of this study is to investigate the shoreline changes over the last decades and to determine coastalvulnerabilitydue to climate change in the future. GIS method has been implemented to assess shoreline changes based on satellite images and other supporting data. Based on LANDSAT images, we found the northern part of Bengkalisshoreline suffers 4 m/year of erosion while the southern part experiences 2m/year of erosion. Combined with the analysis of future climate changes that may lead to sea level rise, the island of Bengkalis is considered to have high index of coastal vulnerability due to dense occupation in the coastal area and constant retreat of shorelines.
2016-04-12T00:00:00ZSurface Water Flow Pattern Tambelan Islands Riau
https://repository.unri.ac.id/handle/123456789/8188
Surface Water Flow Pattern Tambelan Islands Riau
Syaifuddin
Research ocean current patterns beginning Tambelan performed using the esearch vessel Baruna Jaya VIII of the date of November 4 to 16, . In determining the flow pattern using 75 Khz ADCP measure and to determine the characteristics of the water masses using CTD 911 Plus. The number of points Tambelan research station in waters up to 12 stations. For the data used is the tidal ebb and flow of data from the station Pemangkat Hydro Oceanography Department, Navy. Currents in the water system is mainly influenced by the regional water mass movement, the changing seasons, tides, marine topography and geography, while the water mass characteristics are influenced by water masses characterized by shallow water at high temperature and low salinity. Regionally, the mass of water in the western waters. Float trajectories shown in Figure indicated that the mass of water from the ocean Fasifik into the South China Sea through the Luzon Strait and establish branches toward the Strait Karimata. Even the number of passes through the Strait Karimata float higher than the main route through the Strait of Makassar ITF
2016-04-12T00:00:00Z