Judul: The Development of Troll Lines Using Fish Agregation Device (FADs) on Puger Waters, East Java.
Abstrak: Nowdays fisheries sector is undergoing a crisis in global dimensions for the last few years and it has led to the unsustainable consumption, overfishing, as well as the increasing of pollution and climate change distribution. One of the utilization of fisheries resources is tuna especially in South coast Java Seas included Puger seas. Tunas are catched by troll lines using FADs. the using of troll lines and FADs have been found on small scale fisheries. The increasing troll line fleet was caused by the rising number of FAD on Puger water and it has caused bad influence toward the fish stock and social environment which has led to a conflict between fishermen and stakeholders. They usually fought on existing fish stock and it stepped to another conflict. The fish quality from troll line fleet was not feasible due to bad fish handling on board. Another problem that occured on troll line fishery in the Atlantic Ocean was the increasing number of catch unit around the FAD and had caused the declining of tuna fish production and size which economically not favorable and cannot be exported because it must fit the minimum weight requirement of 25 kg. The objectives of this research is to evaluate the FAD equiped troll line fishery and formulating the troll line fishery management strategy on the water of Puger in East Java. This research could be beneficial for stakeholders about the FAD influence on troll line fishery in Puger and as information for academician and researcher about tuna quality that was landed on Puger fishing port and this research could be as recommendation for the local government and related fishery department in managing the troll line equiped with FAD. This research was conducted on January until May 2013 on Puger Fishing Port in Jember East Java when the lean season of Tuna occured at that time. The choice of this location was triggered by the leak of information about troll line fishery around the FAD area in the water of Puger. Two types of data were collected in this research. The secondary data was statistic data which collected from the Puger fish landing port, Veterinar Fishery and Marine Department of Jember Region, BPPPI Department (Balai Pengelola Pangkalan Pendaratan Ikan), Marine and Fisheries Department of East Java. The primary data was collected by interviewing the stakeholders, fishermen, boat owner, fish landing port department and wholesaler also. Result showed the average value of troll line production in the last five years increased by 1436,7 kg/unit. Because of the high fish exploitation on Puger Water the tuna fish size that were landed did not conform the export criteria where the ideal body length interval is 40-49 cm. The tuna organoleptic value in Puger were dominated by scale 6 which did not conform the standard quality also. This was caused by unappropriate post catch fish handling that was done onboard by the fishermen. The main focus was to manage the troll line fishery in Puger which was equipped with FAD. Things that need to be done to solve these problem is by
Keyword: FADs, tuna, social conflict, catch composition, strategy of development.

Judul: Keberlanjutan Perikanan Pancing Tonda menurut Dimensi Teknologi di PPP Pondokdadap, Malang, Jawa Timur
Abstrak: Pondokdadap fishing port has potential for tuna fisheries. In 5 years, Pondokdadap fishing port had produced 1.000 ton/year. This potential must be maintained in order to remain sustainable fisheries. Sustainability fisheries should be seen from ecological, economic, social, technological, and legal dimension. Technological dimension will be able to increase the value of the environmental, social and economic dimension. The purposes of this research were to describe the condition of troll line fisheries in Pondokdadap and to evaluate the sustainability of troll line fisheries in technology aspect. The status of troll line fisheries sustainability was derived by scoring the attributes from technological dimension. Those attributes are trip duration, landing sites, handling on board, vessel size, fishing gear selectivity and changing of fishing gear number. The catches from troll line vessels are yellowfin tuna, bigeye tuna, and skipjack. Based on the analysis of length at maturity analysis, there are 164 yellowfin tunas (75.35%) are worth catching and 51 tunas (24.65%) are not, 375 bigeye tunas (70.83%) are worth catching and 153 tunas (29.17%) are not, and also 174 skipjacks (53.87%) are worth catching and 149 skipjacks (46.13%) are not. Tuna that get an organoleptic score of 9 is 498 tunas (46.72%). Sustainability index score for troll lines fisheries in Pondokdadap fishing port is 57.87 which means quite sustainability.
Keyword: troll line, technology, Malang, sustainability

Judul: Penentuan Nilai Eigen dan Vektor Eigen dari Matriks Tridiagonal 2-Toeplitz dengan Pendekatan Polinomial Chebyshev
Abstrak: The eigenvalues and eigenvectors of a matrix can be determined by finding its characteristic polynomials. The characteristic polynomials of a tridiagonal 2-Toeplitz matrix is shown to be closely connected to polynomials which satisfy the Chebyshev recurrence relationship. If the order of the matrix is odd, then the eigenvalues are found explicitly in terms of the Chebyshev zeros and the eigenvectors are found in terms of the polynomials satisfying the recurrence relationship. For even ordered matrices, the situation is more complicated. The problem in these cases is that although the Chebyshev recurrence formula is still applied, its initial values are not generating Chebyshev polynomials
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