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The growth of three mangrove species seedlings,Bruguiera gymnorrhiza, Rhizophora apiculataand Ceriops decandra in sediments contaminated by crude oil. Thisresearchwas designed to evaluate the acute effects of crude oil on the growth and survival performance of mangrove seedling in 4-week field experiment. Three treatments(sub plot) were compared with the control (no oil added) usingi.e. 100 ml, 120 ml and 140 ml crude oil applied once, in a split-plot design with nine replicates. The result showed the extent of survival has maximum for B. gymnorrhiza while it was minimum for C. decandra. The growth of mangrove seedlings was decrease with higher concentrations of crude oil. Stem height of B. gymnorrhiza seedling higher than R. apiculata and C. decandra.We observed, severe damage in the epidermis and the cortex at the root of all three types of mangrove seedlings when crude oil applied at 140 ml.

Glass eels of Anguilla bicolor is an expensive and still abundant commodity in Laguna Segara Anakan, Central Java, Indonesia. However, the growth of glass eels to elver is still a problem because of high mortality in nursery I and II. The objective of the study was to evaluate the result of stocking density on the performance of glass eels in the biofloc system during nursery I. Glass eels were stocked at densities of 54.95, 109.89 and 164.84 fish/m3, respectively, with three replicate ponds for each density. Eels were fed a formulated pasta-diet containing 40% crude protein and , 4% crude lipid, 5% crude fiber, 11.5% ash and 12% moisture, respectively. The water quality were maintained at levels of for fish culture througout the experiements: water temperature was 27.1°C (ranged from 26.3 to 28.2°C), pH (7.6, ranged from 6.8 to 7.8) and DO (7.2 mg.L-1, ranged 6.9 to 7.5 mg.L-1). The results showed that the stocking density did not significantly affect the final weight, weight gain, AGR, SGR, FCR and survival, however this had a significant effect on the yield. The biofloc system was suitable for raising glass eels.

It has been reported that the waters of the reservoir Mrica-Banjarnegara were mesotropik-hypereutrophic conditions, potential algal bloom is of Division: Cyanophyta is Microcystis; Chlorophyta is pediastrum; Chrysophyceae is Pyrophyta nitzchia and is Ceratium. Research the types of algae that Potentially HABS (harmfull Algae Blooms) has been Carried out as a continuation of the kinds of research that have the potential of algae blooming. Survey methods was used. Sampling was done by purposive sampling, through 5 (five) sampling sites. Data were Analyzed descriptively. The results Showed that the algae are Potentially HABS of the division Cyanophyta are Microcystis, Anabaena, Oscillatoria and phormidium.

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