1,720,964 research outputs found
HASIL TANGKAPAN IKAN TARGET DAN NON TARGET YANG TERTANGKAP DENGAN GILL NET DI MUARA SAMPAI KAWASAN GUDANG ARANG SUNGAI MARO KABUPATEN MERAUKE
Full text linkPenelitian ini bertujuan untuk mengetahui jenis ikan target dan ikan non-target serta untuk mengetahui komposisi spesies, kelimpahan relatif, indeks keanekaragaman dan indeks dominansi yang ditangkap di Muara ke Area Gudang Arang di Sungai Maro, Kabupaten Merauke. Teknik pengambilan data dilakukan dengan menggunakan metode Purposive Random Sampling. Untuk mengetahui keberadaan spesies, dilakukan studi komposisi spesies ikan, kelimpahan relatif, indeks keanekaragaman dan indeks dominansi. Hasil penelitian menunjukkan bahwa tangkapan ikan target adalah 11 spesies dan non-target sebanyak 6 spesies. Kelimpahan hasil tangkapan relatif pada ikan target tertinggi diperoleh pada ikan Bawal putih (Rhinoprenes Pentanemus) dengan nilai 54,47% sedangkan ikan non-target tertinggi berada di White Baung (Cinetodus crassilabri) dengan nilai 82,75%. Indeks keanekaragaman tangkapan spesies ikan target adalah 1,41 sehingga dikategorikan sebagai keanekaragaman sedang, dalam spesies non-target adalah 0,73 dan rendah. Tidak ada jenis yang mendominasi tangkapan, baik ikan target maupun ikan non-target
Molecular Phylogenetic of Cerithidea anticipata (Iredale, 1929) (Mollusk: Gastropod)
Full text linkSpecies identification is very important and an important part of bioecological studies, so phylogenetic studies of Cerithidea anticipata (Iredale, 1929) was conducted in September 2020 to identify C. anticipata (Iredale, 1929) based on DNA barcoding techniques. Samples of C. anticipata (Iredale, 1929) were collected from the mangrove ecosystem of Payum Merauke Beach Papua (Indonesia), where the genes used were primary COI Gene forward LCO1490 and reverse HCO2198. The result of DNA amplification obtained DNA sequence length of 660 bp, then based on the identification of Basic Local Alignment Search Tools (BLAST) obtained a similarity level of 98.42% and phylogenetic reconstruction showed the existence of grouping based on the degree of similarity and genetic distance between populations.Keywords: Cerithidea anticipata; COI genes; DNA barcoding; phylogeneticsAbstrakIdentifikasi spesies sangat penting dilakukan dan menjadi bagian penting dalam studi bioekologi, sehingga kajian filogenetik Cerithidea anticipata (Iredale, 1929) telah dilakukan pada bulan September 2020 dengan tujuan untuk mengidentifikasi C. anticipata (Iredale, 1929) berdasarkan teknik DNA barcoding. Sampel C. anticipata (Iredale, 1929) dikoleksi dari ekosistem mangrove Pantai Payum Merauke Papua (Indonesia), dimana gen yang digunakan adalah Gen COI primer forward LCO1490 dan reverse HCO2198. Hasil dari amplifikasi DNA diperoleh panjang sekuen DNA 660 bp, kemudian berdasarkan identifikasi Basic Local Alignment Search Tools (BLAST) diperoleh tingkat kemiripannya 98.42% dan rekonstruksi filogenetiknya memperlihatkan adanya pengelompokan berdasarkan tingkat kemiripan maupun jarak genetik antar populasi.Kata kunci: Cerithidea anticipata; Gen COI; DNA barcoding; filogeneti
KORELASI SEBARAN GASTROPODA DAN BAHAN ORGANIK DASAR PADA EKOSISTEM MANGROVE DI PERAIRAN PANTAI PAYUM, MERAUKE
Full text linkCoastal area of Payum as an area of mangrove forest located at western of Merauke Regency. Known as area which produce a high amount of organic matters, whether comes from mangrove area itself, stream or even by sea currents. There is much living organism associated with mangrove one of them is gastropods. Sample was collected using transect quadrant methods. The quadrant size are 5 x 5 m and the gastropods were collect as well as the sediment and sea water to measure the organic matter content. At that time the environments parameters also collected they are temperature, salinity and pH. The research result are we’re successful identify 13 species of gastropods, there is Cassidula angulifera, Littoraria scabra, Terebralia sulcata, Cerithidea obtusa, Nerita violacea, Thais rufotincta, Turritella terebra, Glossaulax bicolor, Nassarius micans, Natica lineata, Nerita lineata, Mitra sp., Telescopium telescopium. Furthermore, the sediment analysis shown there are strong correlation (60%) with the existence of gastropods, reverse with sea water analysis having weak correlation which is just have 10% of correlation value. Moreover, the density and frequency relatives of gastropod species in every stasiun dominate by Littorina scabra
Studi Kelimpahan, Hubungan Panjang Berat, Pola Sebaran dan Faktor Kondisi L. intermedia (Gastropoda)
Full text linkLittorinidae is family of gastropods which found abundantly distributed from roots till the edge of mangroves leafs. The aims of research were to find out the abundance, length-weight relationship, distribution patterns and conditions factors of Littorina intermedia which is associated with mangrove ecosystems in Payum beach. This study conducted in three months start in June until August 2020 in the Mangrove Forest Ecosystem of Payum Merauke Beach. Line transect methods with purposive sampling are using to collected all the samples. There are three stations in this location. The results found in Stasion I tnd., respectively.   Both length and weight in the three stations separated into 4 categorize. The higest categories in St. I and St. II belong to category length between 0,96-1,70 cm approximately 638 ind and 84 ind. Reverse with that in St. III belong to category III (1,71-2,45 cm) with 15 ind. Furthermore, for weight analysis dominate with category I with 0,00-0,59 gram which is found in all station.  For lenght and weight analysis using Regreation showed Allometric Negative where the growth of length is faster than body weight. Morever the distribution pattern in all sampling site showed in clumped pattern. The condition factor of species L. intermedia, ranges from 0.31 to 26.45 with an average of 1.15. Key Words: Merauke; Weight-Length Relationship; Distribution; Gastropod; Littorin
IDENTIFIKASI JENIS DAN KELIMPAHAN MOLUSKA YANG DIMANFAATKAN SEBAGAI BAHAN PANGAN PADA EKOSISTEM HUTAN MANGROVE, MERAUKE
Full text linkMollusc as one of protein sources beside fish and shrimp in contribute to fulfill whether consumption and nutrition of community in coastal area on Merauke regency. This research conducted at mangrove forest ecosystem in Payum beach start on February-April 2020. Moreover, mollusc shell also functioned as decoration, accessories, and powder to sirih pinang activity namely “kahos”, whilst mollusk meat being cooked. The aims of this research were to identified and analyzed the spesies composition and abundance of consumed mollucs by a local community. The research methods consist of interview and purposive sampling method with 10x10 m plots, also followed by three times repetition in three stations. The result shows there are 9 species of consumed mollucs as a food resource such as Cassidula angulifera, Ellobium aurisjudae, Telescopium telescopium, Terebralia palustris, Terebralia semistriata, Cerithidea anticipata, Nerita lineata, Stramonita gradata and Onchidium daemelii. Overall, the highest composition and relative abundance of mollusc at Station I, II and III belongs to Cerithidea anticipata with total approximately 4.609 ind and relative abundance 46.77%, otherwise Ellobium aurisjudae with total 18 ind and relative abundance 0.18% became the lowest.
ABSTRAK
Moluska sebagai salah satu sumber protein selain ikan dan udang turut menunjang pemenuhan kebutuhan baik konsumsi maupun nutrisi bagi masyarakat pesisir di Kabupaten Merauke. Penelitian ini dilaksanakan pada ekosistem hutan mangrove pantai payum dari bulan Februari-April 2020. Selain memanfaatkan cangkangnya sebagai hiasan, aksesoris, dan kapur untuk aktivitas sirih pinang (kahos), daging moluska juga diolah menjadi makanan. Penelitian ini bertujuan untuk mengidentifikasi dan menganalisis komposisi jenis dan kelimpahan moluska yang dikonsumsi oleh masyarakat lokal. Metode yang digunakan yakni wawancara dan purposive sampling method dengan penggunaan plot 10 x 10 m dengan pengulangan 3 kali pada setiap 3 stasiun pengamatan. Hasilnya terdapat 9 jenis moluska yang dimanfaatkan sebagai sumber makanan yakni Cassidula angulifera, Ellobium aurisjudae, Telescopium telescopium, Terebralia palustris, Terebralia semistriata, Cerithidea anticipata, Nerita lineata, Stramonita gradata, dan Onchidium daemelii. Komposisi jenis dan Kelimpahan relatif tertinggi pada Stasiun I, II maupun III yaitu Cerithidea anticipata yakni total individu mencapai 4.609 individu dengan KR 46.77% sedangkan yang paling sedikit adalah jenis Ellobium aurisjudae dengan total individu sebanyak 18 ind dan KR 0,18%.
Kata Kunci: Kelimpahan, komposisi, moluska, mangrove, Merauk
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
- …
