Tungro is one of the most common diseases of rice plants which caused by double infection of RTBV (Rice Tungro Bacilliform Virus) and RTSV (Rice Tungro Spherical Virus), and it gives a significant economic loss. These viruses are transmitted by green leaf hopper (Nephottetix virescens. Distant), and the interaction between host plant and the viruses were still quite difficult to be fully understood. In order to look at whether there are any differences between the healthy and tungro infected rice, this study was set to examine the character differences between the infected and the healthy plants based on isozyme banding pattern. The infected plants were collected from three districts around Surakarta (Sragen, Sukoharjo, Klaten) followed by Polyacrilamide Gel Electrophoresis (PAGE) to evaluate the isozyme banding patterns. There were peroxidase, esterase and acid phosphotase isozymes used. The results showed that the real differences of isozyme banding patterns of both healthy and tungro infected plants were discovered. In all cases, the Tungro infected rice had thicker and more band numbers compared to the healthy one. This evident suggested that Tungro infected rice could be detected early using PAGE method.

Mangrove forests have an important function in human life that cannot be replaced by other functions. The existence of mangrove forests has six main functions, namely biological, ecological, physical, social, economic and chemical functions. This article discusses the description of mangrove forest management in meeting the needs of the economic and social functions of the fishing communities on the coast of Merauke Regency, Papua Province, which were reviewed descriptively using relevant literature studies. In terms of economic function, mangrove forests provide economic value for fishing communities because mangrove forests become habitat for crabs, fish and other marine biota that are captured and sold as the main source of family income. In addition, the use of mangrove forests by fishermen on the coast is used as firewood and building materials. The high utilization of mangrove forests by coastal communities that ignores ecological sustainability causes damage to mangrove forests that threatens the sustainability of ecological functions. Damage to mangrove forests in Merauke in the period 2000-2005 was recorded as wide as 2,416 ha while in the 2005-2010 period damage reached 2,233 ha of the total area of the Merauke mangrove forest which reached 216,001.95 Ha or 6.98% of the Merauke forest area. Based on this, the management of mangrove forest utilization needs to get more attention from various parties so that the ecological function of mangrove forests as a condition of sustainable development, especially for fishing communities on the coast, can be realized in Merauke Regency.

Penggunaan dan keragaan unit alat tangkap berpengaruh terhadap keberlanjutan penangkapan ikan. Tujuan penelitian adalah mengkaji optimasi penggunaan alat penangkapan yang ada di Selat Makassar, yaitu perairan Barru Sulawesi Selatan sampai Majene Sulawesi Barat. Penelitian ini menggunakan dua kelompok data, yaitu data sekunder dan data primer. Pengumpulan data primer meliputi keragaan penggunaan alat tangkap, yaitu aspek teknis, biologi, sosial dan ekonomis, standirisasi alat penangkapan, pendugaan parameter model bioekonomi dan model penangkapan lestari (MSY), serta model bionomi. Alat tangkap purse seine merupakan unit penangkapan cakalang yang terbaik, begitu pula dengan aspek dari gabungan fungsi keempat aspek, sedangkan penggunaan alat tangkap yang digunakan pada ikan kakap merah belum mencapai overfishing.

The potential and development of alternative livelihoods for fishermen households in marine conservation areas must be relevant to or refer to the context of contextual technical considerations (locality), and not a deduction or bottom-up policies derivation so that they can grow and develop (facilitating) local fishermen's households in production activities that are complementary to increasing the spirit of the locality, community harmonious with natural resoureces and welfare through the opening of new economic spaces that can be accessed and controlled by the local community themselves. This type of research is qualitative with a case study approach. Data was collected through direct observation and in-depth interviews with some informants. There are 30 fisherman’s household which is used as primary data source informants. Qualitative analysis based on technical variables, namely community interest, availability of local raw materials/natural resources, availability of labor and market opportunities through content analysis from compilation of interview results through snowball technique with reference to triangulation principle. While quantitative data analysis is carried out with business feasibility indicators for new alternative types of livelihoods that can be applied to fishermen households, namely B/C Ratio indicators, Return Of Investment (ROI), and Payback Period (PP). Research result show that based on the analysis of technical variables, the potential alternative livelihoods carried out by fishermen households are seaweed aquaculture, floating net cage aquaculture, processed fishery products, coconut and household scale chicken and duck farming. The B/C ratio value of these businesses is > 1 with very profitable criteria to do.

This research aims to analyze the existence of fishermen conflicts in using of fisheries resources and settlement conflict resolution. The method used is qualitative research through grounded research that explores various cases and forms of conflict between fishermen (hulle fishermen communities (migrants) with local fishermen. Data analysis refers to the functional structural theory and conflict theory. The result of the research shows that the fishermen or groups of fishermen with their capture technologies (traditional, semi-traditional, and modern) must compete freely and be competitive to get fishery resources. The orientation and utilization of spatial aspects also be a type of conflict that extends to primordial conflict aspects. Conflict resolution through co-management strategies by involving various stakeholders in conflict resolution. Strategic steps must be an emphasis on conflict resolution shape that adaptive and responsive through systematic analysis for acceleration the resolution of fisherman conflict issues that developed so far. The formation of fishermen institutions conflict management is needed that involves government elements (related institution), community leaders, fishermen representative, NGO, and universities in charge of potential analyzing fishermen conflicts and handling strategy.