1,720,979 research outputs found
Peningkatan Produksi dan Kualitas Benih Kerapu dengan Program Hybridisasi
Full text linkAbstrakBeberapa jenis benih hybrid saat ini sudah dapat diproduksi secara masal di hatchery. Benih hybrid selain menambah diversifikasi spesies juga mempunyai prospek budidaya yang berpeluang untuk meningkatkan produksi perikanan ke depan, karena itu perlu adanya pemantapan produksi benih kerapu hybrid agar dapat menghasilkan benih yang mempunyai kuantitas dan kualitas yang baik, dan pada akhirnya diharapkan dapat membantu kebutuhan benih pada perikanan budidaya dan pembenihannya dapat diterapkan di masyarakat sebagai usaha yang menguntungkan. Dalam penelitian ini diproduksi secara masal benih kerapu cantik yaitu hasil persilangan antara betina kerapu macan (Epinephelus fuscoguttatus) dan jantan kerapu batik (Epinehelusmicrodon). Penelitian ini mengkaji hasil produksi benih kerapu cantik dibandingkan dengan produksi benih kerapu macan dan kerapu batik. Hasil penelitian produksi benih kerapu cantik mempunyai kelangsungan hidup yang lebih tinggi yaitu 24,59% dibanding dengan macan yaitu17,44% dan batik yaitu 4,63%. Panjang total benih pada umur 45 hari masing-masing kerapu cantik 3,59 ± 0,21 cm; macan 3,24 ± 0,55 cm dan batik 2,61 ± 0,42 cm. Abnormalitas benih kerapu cantik 4,13%, macan 30,21% dan batik 0,57%. Hasil analisa variasi genetik kerapu cantik mempunyai kekerabatan lebih dekat dengan kerapu macan dibandingkan dengan kerapu batik.Kata kunci: Kerapu Cantik, program hibridisasi, produksi beni
USAHA PENDEDERAN BENIH KERAPU MACAN (Epinephelus fuscoguttatus)
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Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
PERKEMBANGAN POPULASI Nannochloropsis oculota PADA SUHU DAN SALINITAS YANG BERBBDA
Full text linkMengingat pentingnya bibit baru untuk kultur NNannochloropsis oculota secara massal maka perlu adanya stok murni fitoplankton ini di laboratorium. Percobaan telah dilakukan untuk mengetahui pengaruh suhu dan salinitas terhadap perkembangan populasi N. oculota. N. oculata dikultur pada botol volume satu liter dengan kepadatan awal 3 juta seUml dan intensitas cahaya1500-3000 lux dengan penyinaran selama 24 jam/hari
THE EFFECT REPLACEMENT OF OXYGEN ON TRANSPORTATION SEEDS GROUPER WITH CLOSED SYSTEM
Full text linkThe location of grouper aquaculture are usually far from the seed source so it takes a long time to transport the seeds. The research purposes was to extend the time by replacing oxygen so the seeds can reach the destination that is located far away with high survival and healthy condition. Previously conducted preliminary research that is transportation with a different length of time 24 hours; 36 hours; 48 hours and 60 hours. The best results of the preliminary study are 24 hour transport which is then used in the main research. In the main study, fish seeds were transported for 24 hours later, oxygen was replaced by: oxygen in disposable plastic bags replaced with new oxygen. Then repackaged to continue transport up to 12 hours; 24 hours; 36 hours and 48 hours. Trasportation conducted with closed system with car. Seeds used were cantik grouper hybrid seed i.e., a crossbreed between female tiger grouper (Epinephelus fuscoguttatus) and male marbled grouper (Epinephelus microdon), a size of 7.0 ± 0.54 cm, with a density of 125 fish / boxes. Grouper seeds were packed with 0.8 mm thick plastic bags, 120cm x 53cm wide, filled with 10 liters of sea water, oxygen is added with a volume ratio of water: oxygen is 1: 3, then put in 75 x 40 x 30 cm styrofoam box. The best result is after fish is transported 24 hours, then replaced oxygen and transported again for 24 hours, so that transportation time can be extended up to 48 hours, with survival rate 98.4%. Keywords: grouper seeds, oxygen replacement, transportation</jats:p
DURATION TIME AND EGGS DENSITY TO IMPROVE CLOSED TRANSPORTATION TECHNOLOGY ON EGGS GROUPER
Full text linkThe grouper hatchery technology has been successfully developed and grouper seed can be produced massively and sustainly. Egg is one of key successes in the hatchery processes. Eggs taken from hatchery egg producer were often far away from a final hatchery location. This study tried to find out the effectiveness of eggs transportation duration and densities for eggs’ hatchability of tiger grouper (Epinephelus fuscoguttatus). The first treatment: eggs at a density of 400 000 eggs/8 l sea water, transported with different duration time i.e., 6, 12, 18, and 24 hours. The second treatment: transportation eggs with duration 24-hour at different density i.e., 100,000; 200,000;300,00; and 400,000 eggs/8 l sea waters. Eggs were packaged in a plastic bag with 8 liters of water media, the plastic size 100 cm x 55 cm, ratio water with oxygen was 1: 3, the plastic bag inserted to sterofoam with size 75 cm x 40 cm x 30 cm, to reduce the temperature in sterofoam was added ice the size of 500 grams , wrapped in newspaper, styrofoam covered by selotipe. The results showed that eggs with transportation time of 6 and 12 hours were better and significantly different (P <0.05) than transportation time of 18 and 24 hours. Furthermore, density of 100,000 and 200,000 eggs/8 l sea waters were better and significantly different (P <0.05) than that density of 300,000 and 400,000 eggs/8 l sea waters. Keywords: hatchery, eggs grouper, transportation
EGGS PRODUCTION OF GROUPER HYBRID FOR SUPPORTING HATCHERY BUSINESS
Full text linkThe grouper hatchery now has been widely developed, usually purchased eggs from the business that produces hybrid grouper eggs in accordance with the amount as needed. Eggs grouper that is currently in demand are eggs grouper cantang that is a cross-breed between female tiger grouper (Epinephelus fuscoguttatus) and male giant grouper (Epinephelus lanceolatus) and cantik that is a cross-breed between female tiger grouper and male grouper batik (Epinephelus Microdon). The purpose of this research is to get information about hybrid egg production activities, marketing and economics. The study was conducted in Buleleng regency in January-December 2015, data was taken from five hatchery or business that produces only hybrid grouper egg that is one business (A) in the village of Banyuasri, Buleleng district; Three businesses (B); (C) and (D) in the village of Penyabangan, Gerokgak district and the effort (E) in the village of Banyupoh, Gerokgak district, the data were analyzed descriptively. The results of the five businesses may produce as many eggs as five to eight times a year by the amount that can be marketed 24,200,000 - 44,500,000 eggs. The result of business analysis R / C ratio > 1 which means the business is profitable. Keyword: eggs, hatchery, hybrid, production, support</jats:p
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