1,720,976 research outputs found
Komposisi Hasil Tangkapan Perikanan Payang dan Bagan Tancap Pada Semester 1 2006 : Catch Composition of Danish Seine and Lift Net in Semester 1 2006
Full text linkTeluk Jakarta merupakan bagian dari perairan Laut Jawa yang ditandai dengan aktivitas perikanan yang intens dan masif. Aktivitas perikanan utama di wilayah Teluk Jakarta adalah perikanan payang dan bagan tancap yang dioperasikan oleh nelayan kecil di sekitar Teluk Jakarta dan Kepulauan Seribu. Penelitian ini bertujuan untuk menganalisa komposisi hasil tangkapan serta daerah penangkapan payang dan bagan tancap di Teluk Jakarta pada semester 1 2006. Penelitian ini dilaksanakan dengan metode fishing experiment pada payang dan bagan tancap. Hasil penelitian menunjukkan bahwa hasil tangkapan payang dan bagan tancap didominasi oleh jenis ikan demersal namun proporsi tangkapannya tidak jauh berbeda dengan jenis ikan pelagis. Komposisi hasil tangkapan payang pada Agustus dan Oktober didominasi oleh jenis ikan pelagis, sedangkan pada bulan Desember didominasi oleh jenis ikan demersal. Nilai laju tangkap payang untuk jenis ikan pelagis ditemukan tinggi pada Agustus dan Oktober disebabkan oleh dominasi ikan cekong (Sardinella lemuru) dalam jumlah besar. Komposisi hasil tangkapan bagan tancap pada Mei didominasi oleh jenis ikan demersal, sedangkan pada Oktober didominasi oleh jenis ikan pelagis. Daerah penangkapan payang meliputi perairan Pulau Damar, Pulau Bendera, Muara Pecah, Muara Angke, Pulau Onrust, Pulau Putri, Kronjo, sedangkan daerah penangkapan bagan tancap terkonsentrasi di sebelah barat perairan Teluk Jakarta, sekitar Pulau Kayangan, Pulau Bidadari dan Pulau Onrust.
REHABILITASI WILAYAH PESISIR MELALUI PENGEMBANGAN TERUMBU BUATAN
Full text linkKerusakan terumbu karang yang disebabkan oleh aktivitas penduduk wilayah pesisir yang tidak terkendali, mengakibatkan hilangnya nilai-nilai produksi, genetik, dan konservasi. Salah satu program yang sudah dilakukan pemerintah adalah rehabilitasi dan pengkayaan habitat pantai melalui pengembangan terumbu buatan, yaitu teknologi sederhana yang telah terbukti di beberapa negara mampu mengatasi kekompleksan wilayah pesisir. Dampak dari pengembangan terumbu buatan tersebut antara lain meningkatkan produksi perikanan, meningkatkan hasil tangkapan ikan per upaya,menarik perhatian para wisatawan, berfungsi sebagai taman laut, pelindung pantai, dan sarana budi daya perikanan. Tulisan ini menyajikan bagaimana terumbu buatan dapat dikembangkan, contoh contoh yang sudah dilakukan di Indonesia dan bagaimana monitoring dan evaluasi
PENGKAYAAN STOK TERIPANG PASIR (Holothuria scabra) DI PERAIRAN KEPULAUAN SERIBU
Full text linkAkibat aktivitas penangkapan yang berlebihan, stok sumber daya teripang di perairan Kepulauan Seribu, terutama jenis yang bernilai ekonomis tinggi, seperti teripang pasir (Holothuria scabra) sudah mulai langka. Pengkayaan stok adalah salah satu upaya untuk memperoleh sumber daya yang berkesinambungan. Pengkayaan stok teripang pasir telah dilakukan di Kepulauan Seribu melalui 2 tahapan, yaitu pembesaran benih (intermediate culture) yang dilakukan di perairan Pulau Kongsi dan pelepasan di alam (restocking) yang dilakukan di perairan Pulau Pamegaran. Benih yang digunakanberasal dari alam (Teluk Lampung) dan dari panti pembenihan (hatchery). Hasil pengamatan lingkungan menunjukkan bahwa habitat dari ke-2 perairan tersebut mendukung untuk kehidupanteripang pasir. Pertumbuhan teripang baik pada tahap pembesaran benih maupun pelepasan di alam sangat signifikan. Pertumbuhan benih teripang pada 2 bulan pertama dari rata-rata 51 g menjadi 130 g per ekor. Pertumbuhan teripang setelah di lepas di alam pada 2 bulan pertama, dari rata-rata 338,50 g menjadi 619,80 g per ekor, dan berhasil tertangkap kembali 13%
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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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