Increasing type and number of human activities will impact on decreasing quality of water. Therefore, it is necessary to determine the water quality status of Rawapening Lake regularly to ensure that the water quality remains in its natural condition. The purposes of this study were to evaluate the water quality status and class of Rawapening Lake. The survey was done in the lake during dry season for 3 months (July to September 2016). Water sampling conducted in seven locations. The measured variables were all parameters as specified in Government Regulation No. 82 of 2001. To determine the water quality status was using storet methods. Determination of the water class was by comparing the concentration of all parameters with the standard. Observations indicated that the Rawapening Lake water quality status was in heavily polluted. There were eight parameters exceeding the standard i.e. TSS, BOD, COD, total phosphor and total coliform, Cd and Pb, and H2S. Therefore, it is necessary to decrease them through activities such as not throwing rubbish into the lake, lifting biomass of water hyacinth, picking up peat soil sediments, using environmentally friendly fuels, reducing fertilizers and pellet, reforesting critical lands, limiting mining activities, banning waste disposal directly to rivers.

Nutrients are substances that are used by living organisms in the growth and survival of organisms. On the basis of this background, the aim of this study was to assess the concentration of nutrients (macro and micronutrients) and chlorophyll in the Menjer lake and to examine the relationship between nutrient concentration and algal biomass to identify the determinants of algal development in tropical lakes (Menjer Lake Wonosobo, Indonesia). The research was conducted using a survey method at Menjer Lake Wonosobo. Observations and sampling were carried out 3 times with intervals of 1 month at 7 locations in the photic zone. The concentrations of macronutrients and micronutrients in the Menjer Lake were spatially even in all locations and the temporally slightly increased concentrations were relatively the same during the measurement period. The Cu, NO 2 , Si, and Na macronutrients are the determining factors for algal blooming in Menjer Lake Wonosobo. The effect of Cu, NO 2 and Si concentrations was inversely related to the algal abundance, while the Ca, Na and Mo concentrations were in line with the abundance of algae.

Ketahanan pangan merupakan salah satu faktor penentu kesejahteraan masyarakat khususnya di pedesaan. Upaya untuk mencapai kondisi tersebut perlu adanya kerjasama antar berbagai elemen, salah satunya peran perguruan tinggi melalui kegiatan pengabdian masyarakat. IPTEKS tentang diversifikasi hasil olahan ikan lele, telah dilakukan di Desa Kaliwangi Kecamatan Purwojati Kabupaten Banyumas. Kegiatan tersebut bertujuan untuk meningkatkan pengetahuan dan kemampuan ibu-ibu anggota PKK dan para remaja putri Desa Kaliwangi dalam mengolah makanan yang bersumber dari bahan baku yang sama menjadi beberapa tampilan yang berbeda; memberikan ketrampilan dalam penanganan pasca panen, khususnya pengolahan ikan lele menjadi bahan olahan siap saji yang sehat, bergizi, praktis serta ekonomis; memberikan ketrampilan kreatif pada ibu-ibu anggota PKK dan para remaja putri dalam membuat nugget dan kaki naga lele dan, memberikan ketrampilan dalam pengemasan produk olahan ikan (khususnya pembuatan nugget dan kaki naga). Metode yang digunakan meliputi pembekalan materi melalui penyuluhan/ceramah, praktek dan demostrasi plot (demplot), selanjutnya dilakukan monitoring dan evaluasi. Selama kegiatan praktek dilakukan pendampingan untuk membantu khalayak sasaran menghasilkan produk yang bagus. Hasil evaluasi menunjukkan adanya peningkatan pengetahuan, pemahaman dan ketrampilan di dalam mengolah ikan lele sebagai produk olahan baru berupa nugget dan kaki naga yang disukai dan bermanfaat bagi kesehatan serta dapat digunakan sebagai salah satu peluang usaha.

Two important issues for establishment of nutrient criteria are identifying which nutrient limits algal growth and determining the concentration of that nutrient enabling nuisance growths. The purposes of this research were: 1) to examine the nutrient (TN, TP, ratio of TN/TP) dynamic in Rawapening Lake spatially and temporally, 2) to identify Nutrient Limiting of Algal Growth in Rawapening Lake, and 2) to determine the nutrient criteria for enabling algae growth in Rawapening Lake. The research was conducted using a survey method in 7 sites from February to August 2016. The result showed that spatially Total Nitrogen (TN) and Total Phosphor (TP) in the lake were not evenly distributed and temporally influenced by the inflow. The development of algae biomass in Rawapening Lake determined ratio of TN/TP. Nutrient criteria as follow: oligotrophic was 5.96 -14.39, mesotrophic was 14. 39 -42.15, eutrophic 42.15 -51.65, and hyper-eutrophic > 51.65. These criteria could be used in designing controlling eutrophication problem by arranging nutrient input from both external and internal sources in order to meet those limit. The benefits of research contributes to the development of environmental monitoring methods to assess the trophic status using more appropriate in accordance with the conditions of the tropics region. It also could be used for consideration in policy direction and orientation of land use in catchment areas in relation to water quality of the lake.

Kelompok Pembudidaya Ikan (Pokdakan) binaan Balai Benih Ikan (BBI) Majenang Kabupaten Cilacap, belum memiliki pengetahuan dan keterampilan pembenihan ikan dengan teknik pijah induksi, sehingga perlu dilatih agar mampu mengelola pembenihannya secara optimal. Penguatan kapasitas individu dan kelompok dapat dikembangkan dengan penerapan strategi yang tepat dan terencana. Salah satu konsep yang dapat diterapkan adalah penyuluhan yang dikemas dalam bentuk pelatihan. Terkait dengan hal itu, telah dilakukan pelatihan terhadap Pokdakan binaan BBI Majengan dengan tujuan untuk memberikan pengetahuan dan keterampilan dalam pembenihan ikan nilem (Osteochilus hasselti Valencienes, 1842) dengan pemijahan induksi. Metode yang digunakan adalah partisipatif, yang meliputi tahapan persiapan, pelaksanaan pelatihan, evaluasi, dan pendampingan. Kegiatan berlangsung pada periode Maret-Juni 2021. Hasil kegiatan menunjukkan bahwa anggota Pokdakan mampu mengelola dan melakukan pembenihan ikan nilem dengan pijah induksi menggunakan wadah serbaguna. Keberhasilan dalam memproduksi benih ikan nilem tersebut mengindikasikan telah terjadi peningkatan pengetahuan dan keterampilan, yang sekaligus juga menunjukkan telah terjadi penguatan kapasitas individu serta kelompok.