Judul: Analysis Catching Activity of Eel Elver on the Water of Cimandiri Estuary, Palabuhanratu Bay, Jawa Barat
Abstrak: Eels (Anguilla sp.) are potential export commodities. However, there is a decrease in the number of eel elvers. Eel farming is still difficult to do if it starts from the stage of eggs and larvae. So, fishermen catch eel elver at the river or sea. Then, the elvers have been raised in fishpond. The current research attempts to describe the catching activities of eel elvers, to describe the condition of eel elver resources, and to estimate the relationship between sea surface temperature (SST), chlorophyll-a and fishing ground of eels at Cimandiri’s estuaries, Palabuhanratu Bay. The Research conducted on January to April 2012. Data were collected by interviews and also downloaded SST and chlorofil-a concentration images on http://oceancolor.gsfc.nasa.gov and http://www.nodc.noaa.gov/. The results show that, fishermen use simple fishing gear and operating technique for catching eel elvers. The fishing gear have been used by fisherman are waring and anco. Fishermen sell eel elver’s catch to the aquaculture’s company. Moreover, there was a sharp decrease in the volume in the eel elver catches. It is because the eel elver resources condition is getting worse compared to the early period of fishing activities. In addition, the SST averages was still in the range value of adaptation for eel elvers. It is because there is a small number of temperature variety in tropical water (including Indonesian water). In addition, the average concentration of chlorophyll-a included high categories from 1998 to 2011. So that, the high concentration of chlorophyll-a is a good location for the growth of phytoplankton and other aquatic animals.
Keyword: 

Judul: Opsi Pengelolaan Sumber Daya Ikan Sidat Berdasarkan Distribusi dan Pertumbuhan di Sungai-sungai yang Bermuara ke Teluk Palabuhanratu, Jawa Barat
Abstrak: Freshwater eels are usually considered catadromous because they spawn in marine waters and the juveniles grow in freshwater habitats following a long migration from their offshore spawning area. The objective of this research is to study the distribution, the pattern of growth, and present in system information. Field sampling was conducted in 7 rivers (Cimandiri, Cipalabuhan, Citepus, Cisukawayana, Cimaja, Citiis, and Cibareno) from July to October 2013. Glass eel and elver were kept in absolute alcohol, futhermore it used for calculating length weight relationship and condition factor. The making of eel migration flash animation refers to the system development cycle of The Waterfall Model. The result of the research showed that eels is present in each river with the highest catches in Cimaja River. In terms of growth pattern, both A. bicolor bicolor and A. marmorata juvenile have positive allometric, while glass eel have negative allometric. Eel condition factor values between one to another station is not much different. Cimaja River potentially as eel resources conservation area. Additionaly, eel migration information system has been implemented in flash animation.
Keyword: migration, length-weight relationship, eel, distribution, condition factor

Judul: Transisi Fasa Materi Hadronik ke Materi Kuark pada Inti Bintang Neutron.
Abstrak: Bintang neutron terdiri dari beberapa lapisan yang disusun oleh materi nuklir yang berbeda dengan kerapatan yang semakin tinggi ketika mendekati pusat bintang. Inti luar bintang neutron disusun oleh materi hadronik (nukleon, lepton, dan hyperon), sedangkan inti dalam bintang neutron disusun oleh kuark-kuark bebas (up, down, strange) yang saling berinteraksi. Tujuan penelitian ini adalah mempelajari bagaimana transisi dari inti luar ke inti dalam bintang neutron dengan menggunakan pendekatan RMF (Relativistic Mean Field) untuk materi hadronik dan CIDDM (Confined Isospin Density Dependent Mass) untuk materi kuark. Tekanan transisi diperoleh ketika potensial kimia barion materi hadronik dan materi kuark bernilai sama. Nilai tekanan transisi dengan parameter SU6-TM1 sekitar 87 MeV/fm3 dan diperoleh massa maksimum bintang neutron yaitu 1.92M dengan jari-jari sekitar 8.62 km. Nilai tekanan transisi dengan parameter SU6-G2 sekitar 53 MeV/fm3 dan massa maksimum bintang neutron yaitu 1.88M dengan jari-jari sekitar 8.16 km. Jenis transisi fasa adalah orde satu ditandai dengan diskontinuitas dalam kerapatan energi (adanya mixed phase). Parameter-parameter pada model nuklir yang digunakan menyebabkan perbedaan kekakuan persamaan keadaan (EOS) dari materi hadronik dan materi kuark sehingga nilai tekanan transisi dari fasa hadronik ke fasa kuark juga berbeda.
Keyword: bintang neutron, persamaan keadaan, transisi fasa