Anura includes frogs and toads, playing an important role as ecosystem quality bioindicators, as well as insect population control. Anura is very sensitive to changes in the environment, since its egg stadium. Disruption to its natural habitat, can threaten Anura's survival. This research is done in the Nature reserve area and Telaga Warna Natural Nature Park. Observations using the Visual Encounter Survey (VES) method. Analyses conducted include the calculation of the species diversity index of Shannon-Wienner, the frequency of species meetings, and the density of species. The results of the research gained 11 species of Anura from 5 families, namely Megophryidae, Microhylidae, Ranidae, Dicroglossidae, and Rhacoporidae. The level of diversity of Anura species in the research site is moderate (H ' = 0.152). Density ranged from 0.07 to 0.24 tails/m2, and the highest density is demonstrated by the Rhacophorus margaritifer. The frequency of meetings at a sampling location ranges from 0.01 to 3.6%, with the highest frequency being Rana chalconota. Generally, the quality of the ecosystem of Telaga Warna is good, especially in the area of Gayung Swamp
Abstract. Melinda K, Suseno H, Prihatini W. 2015. Bioaccumulation and distribution of 137 Cesium in the Humpback Grouper Fish (Cromileptes altivelis). Nusantara Bioscience 7: 180-184. Humpback grouper fish (Cromileptes altivelis) is a highly valuable export commodity of food products. The high demand of this species needs to be supported by the intensive coastal aquaculture. However, the coastal aquaculture has been jeopardized by several threats, for an example radionuclide pollutant 137 Cesium ( 137 Cs) generated from nuclear reactor wastes. The pollutant accumulation in fish occurs because of continuing exposure to the pollutant-containing medium.
Fish provides many benefits for humans, such as food and ornamental fish. Lake fish in West Java is increasingly threatened due to environmental degradation. This study aimed to record the diversity of fish species and its potency in Cilodong Lake, Depok. The parameters measured were the diversity of fish species by Shannon Wienner index, and the physical chemical of water quality that were pH, DO, BOD, COD, TOM, temperature, brightness, and depth. This research found 12 species consumption fishes, and 5 species of ornamental fishes. Four most common species found were Oreochromis mossambicus (cichlids/mujair), Oreochromis sp., Hypostomus sp. (ikan sapu-sapu), and Dermogenys pussil (julung-julung). The Pearson correlation analysis results showed that all physical chemical parameters of water correlated inversely with the diversity of fish species. Parameters that had very strong correlation with the species diversity in Cilodong Lake were the water depth, temperature, and COD. Keywords: Species Diversity, Fish, Lake Cilodong
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