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.
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Judul: Health Status of Eel (Anguilla sp.) from Natural and Temporary Rearing.
Abstrak: Eel (Anguilla sp.) has been become a high economic valuable fisheries resources which has decreasing stock for the last two decade. The dependence of aquaculture from natural catching of juvenile, because of unknown breeding technique, derived this organism into over fishing for juvenile which is migrate to upstream or the adult which is migrate to deep sea to breed. Influence of pollution and or pathogen infection has been supported the decrease of stock in nature. The health status of this organism, therefore used to analysed population structure and the change of individual and population in order to make some strategy to keep this resources ever last and to develop the best aquaculture technique. The health status are information comprised organism condition linked with immunity of pathogen infection, interaction with other microorganism and influence of nature condition. This information would be useful to know the fitness of organism in their natural live or in artificial nature such as aquaculture. This research has been held to compare the eel health status from natural and temporary rearing during ten days of rearing in fish collector before use to aquaculture. This information would be useful to develop some standard health status of juvenile eel and to create the best temporary rearing method in order to keep the quality of juvenile. Sample were taken from two main rivers in Cilacap Residence (Donan River and Serayu River) where the eel use it as migration route. Sample also taken from bendung gerak Serayu, an artificial dam, which is obstructing the migration of eel. The result shows that although no significant different in condition factor, the temporary rearing has increasing reddish node in the head, body, fins and tail of eel. There are four parasite founded in this research that are Nematode (Procamallanus sp. and Anguillicola sp.) which are infected internal organ of eel and Platyhelminthes (Dactylogyrus sp. and Deropristis sp.) which are infected the gills. Identification of Anguillicola sp. is the first record from Indonesian waters. The bacteria founded in this research are Aeromonas hydrophylla, Pseudomonas luteola, Vibrio fluvialis, Aeromonas sobria and Aeromonas caviae. The highly prevalence of infection coming from genus Aeromonas and has been influenced the haematological condition and histopathology of eel. Decreasing of haematocrit level from 38.27 ± 0.63 in sample from bendung gerak Serayu to 37.54 ± 0.45 (%) and total erythrocyte from 2.47±0.18 to 2.36±0.11 (x106 cell/ml) after ten days temporary rearing in Kebasen shows that this group of bacteria has a very high potent causing anaemia in eel. In the other hand, increasing of total erythrocyte, decreasing of lymphocyte percentage and increasing of monocyte and neutrophil percentage for all observed sample indicated that eel had been developing innate immunity to face of inappropriate condition in temporary rearing. The pathogen disruption has also been detected from histopatologycal disorder such as hyperplasia of gills, necrosis and inflammation of heart and necrosis and lesion of muscle. Infestation of parasite with their hooks and or infiltration bacteria with their virulent factor could damage the cell of eel organ. This disruption shows that temporary rearing has been becoming
Keyword: eel (Anguilla sp.), health status, temporary rearing

Judul: Grup dan Homomorfisma Grup pada Rubik Revenge
Abstrak: Rubik cube is a kind of puzzle game. A player must arrange rubik sides, which have been disordered, back to the position where every side has the same colour. This paper does not focus on the settlement solution, but instead on proving the existence of a group homomorphism between rubik movement group and S96 symmetric permutation group in rubik revenge. Firstly, it has been proved that rubik movement set is a group. Then, it also has been proved that the M set, which contains numeric labels of 1 until 96 in cubinos sides, is S96 symmetric permutation group.
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