The high price of commercial feed causes higher production costs. The problem was experienced by fish farmers, including the groups of pond farmers in East Releut Village, North Aceh. The purpose of this activity is to improve the pond farmer's skills by developing artificial fish feed made from local raw materials using Moringa leaf flour. This service activity uses an educative, participatory, and persuasive method approach. Also, the procedures consist of several stages, that are socialization about artificial fish feed made from local raw materials, socialization about the introduction of various local raw materials that have the potential to be used as feed ingredients, socialization about manufacturing technology fish feed, training in the stages of making fish feed, and marketing training for artificial fish feed made from local raw materials. The socialization and training on the process of artificial feed also motivate pond farmers to produce fish feed made from local raw materials. The participants were very satisfied on the knowledge/information (64,58%), the explanation of knowledge (72,22%), and the whole activity (63,89%), and satisfied on discussion process (58,33%). Participants hoped that developing artificial feed products, could reduce the cost of production
Total Suspended Solid (TSS) is a solid particle suspended in the water column of organic and inorganic materials, sized more than two micrometers. The high concentration of TSS in the waters causes a decrease in water clarity and potentially reduces dissolved oxygen that can threaten the life of aquatic biota. This study aims to analyze the spatial and temporal distribution of TSS and analyze the influence of rainfall on TSS in Laut Tawar Lake waters. The lake TSS ranged from 44 – 91 mg/L with an average of 68.67 ± 11.23 mg/L. Spatially TSS ranged from 63.17 - 73.67 mg/L and temporally ranged from 51.14 - 81.43 mg/L. The distribution of TSS was not spatially different because the lake waters are perfectly agitated. The difference in TSS was obtained temporally due to the influence of rainfall. The catchment area can be eroded by only 100 mm of rain/month. It leads to high production of TSS loading into the lake waters. It was indicated by the difference in TSS of Dry Months with TSS of Wet and Moist Months. The determinant coefficient of influence of rainfall on the TSS concentration of the lake waters is 0.62.
Penelitian ini bertujuan untuk menguji toksisitas herbisida golongan asam phenoxy terhadap mortalitas udang vaname, dengan melakukan uji pendahuluan, uji persistensi, uji moertalitas dan kualitas air. Rancangan penelitian menggunakan metode regresi dan analisis probit dengan 6 perlakuan dan 3 ulangan yaitu A konsentrasi herbisida 0 ml/L, B konsentrasi herbisisda DMA-6, 0,025 ml/L air, C konsentrasi herbisisda DMA-6, 0,005 ml/L air, D konsentrasi herbisisda DMA-6, 0,075 ml/L air, E konsentrasi herbisisda DMA-6, 0,1 ml/L air dan F konsentrasi herbisisda DMA-6, 0,125 ml/L air. Pestisida tidak berpengaruh terhadap perubahan suhu, oksigen terlarut (DO), Salinitas dan pH . Gejala klinis akibat pemaparan Pestisida terhadap udang vanamei adalah gerakan yang tidak beraturan, cangkang terkelupas,berenang mendekati aerasi, hingga mengalami kematian. Nilai LC50 pada uji toksisitas herbisida yaitu LC50 24 jam 0,124mg/l, nilai LC50 48 jam yaitu 0,099 mg/l, nilai LC50 72 jam yaitu 0,073mg/l, dan nilai LC50 96 jam yaitu 0,026 mg/l.
Abstrak. Penelitian ini bertujuan untuk: (1) Mengetahui perbedaan keterampilan generik sains siswa menggunakan model pembelajaran inkuiri dan pembelajaran konvensional. (2) Mengetahui keterampilan generik sains antara siswa yang mempunyai kreativitas tinggi dan siswa yang mempunyai kreativitas rendah. (3) Mengetahui interaksi antara model pembelajaran inkuiri dengan kreativitas terhadap keterampilan generik sains siswa pada materi alatalat optik. Penelitian ini merupakan jenis penelitian quasi eksperimen. Populasi penelitian ini adalah seluruh siswa kelas X semester II SMA Negeri 1 Peukan Pidie T.A. 2013/2014 sebanyak 5 kelas (152 orang). Sampel penelitian terdiri dari 2 kelas yaitu kelas X-1 (kelas Eksperimen) dan kelas X-4 (kelas kontrol) yang ambil secara cluster random sampling. Instrumen penelitian berupas tes keterampilan generik sains dan tes kreativitas. Data dianalisis menggunakan SPSS 17, hasil pengujian hipotesis ANAVA 2 jalur sebagai berikut: (1) Model pembelajaran Inkuri lebih baik dalam meningkatkan keterampilan generik sains siswa dari pada pembelajaran konvensional. (2) Keterampilan generik sains siswa yang mempunyai kreativitas tinggi lebih baik dibanding dengan siswa yang mempunyai kreativitas rendah. (3) Ada interaksi antara model pembelajaran Inkuiri dengan pembelajaran konvemsional dan kreativitas terhadap keterampilan generik sains siswa. Kata kunci: model pembelajaran inkuiri, kreativitas, keterampilan generik sains THE EFFECT INQUIRY LEARNING MODEL AND CREATIVITY TO STUDENTS' SCIENCE GENERIC SKILLS IN SMA NEGERI 1 PEUKAN PIDIE Mainisa and Ridwan Abdullah Sani Physics Education Program-State University of MedanAbstract. This research aimed to: (1) find the difference of student achievement of science generic skills using Inquiry learning model and conventional learning, (2) to figure student achievement of science generic skills between high creativity student with those who had low creativity. (3) to figure the interaction between the creativity and learning model to achievement of science generic skills on optic topic. The population of this research was the entire students of grade X SMA Negeri 1 Peukan Pidie Learning
Microalgae have the potential to developed into medicinal products, wastewater treatment, food and energy products. Indonesia is a tropical country has the potential to produce microalgae. The growth of microalgae was influenced by several factors, the main factors is nutrition. This study aims to produce a pattern of mathematical relationships between microalgae growth and nutrient availability of the Laut Tawar Lake. Data collection was carried out for 30 days with a frequency of 7 days at 7 stations. Furthermore, the analysis was carried out to obtain concentration values of nitrate, phosphate and chlorophyll-a. Nitrate concentrations during the study ranged from 310-430 µg/L. The lowest average nitrate concentration was found at Station 4, which was 330 ± 34.64 µg/L and the highest was found at Station 3, which was 396.67 ± 41.63 µg/L. Phosphate concentrations during the study ranged from 18 – 22 µg/L. The highest phosphate concentrations were found at Station 1 and Station 6, which were 20.67 ± 0.58 µg/L and 20.67 ± 1.53 µg/L, and the lowest were found at Station 3, which were 19.00 ± 1.00 µg/L. The concentration of chlorophyll-a ranges from 5 – 12 µg/L. The highest average concentration of chlorophyll-a was obtained at Station 6, which was 10.00 ± 1.00 µg/L and the lowest was found at Station 3, which was 7.00 ± 2.00 µg/L. In conclusion, increasing nitrate in the Lake Laut Tawar did not increase microalgae biomass, microalgae species in that habitat were influenced by nutrient phosphate.
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