1,720,977 research outputs found
Fig. 8 in Species authentication of Tor spp. (family Cyprinidae) in Indonesia based on osteocranium structure and biometric data
No full textFig. 8. Morphology of the mandibular arch (suspensory) and the opercular apparatus seen from the lateral view. A: T. tambroides; B: T. tambra; C: T. douronensis; and D: T. soro. AN: angulo-articular bone; PL: palatinum bone; CM: coronomeckeli bone; DN: dental bone; ECT: ectopterygoid bone; END: endopterygoid bone; HY: hyomandibular bone; IOP: interoperculum bone; MTP: metapterygoid bone; OP: operculum bone; OPJ: opercular joint bone; PCR: coronoideus processus bone; PO: opercular processus bone; POP: preoperculum bone; QD: quadratum bone; RA: retroarticular bone; SOP: suboperculum bone; SYM: symplectic bone. Scale bar: 0.5 cm.Published as part of <i>Akmal, Yusrizal, Muliari, Muliari, Humairani, Rindhira, Zulfahmi, Ilham, Burhanuddin, Andi Iqbal, Budimawan, Budimawan & Batubara, Agung Setia, 2022, Species authentication of Tor spp. (family Cyprinidae) in Indonesia based on osteocranium structure and biometric data, pp. 21-30 in Zoologischer Anzeiger 299</i> on page 27, DOI: 10.1016/j.jcz.2022.05.001, <a href="http://zenodo.org/record/10374286">http://zenodo.org/record/10374286</a>
Biology and ecological functional of Genus Crassostrea (Bivalvia: Ostreidae): a review
Full text linkThe genus Crassostrea has an important role for community life in coastal and mangrove ecosystems. In this article, we try to review in detail the ecology, biology, and ecological functions of Crassostrea spp. Furthermore, we also review about 25 species of Crasostrea that exist in the world and also have a high level of adaptation. Based on ecological functional, Crassostrea acts as an efficient engineer of ecosystems, where in forming ecosystems, in nutrient cycling, in reducing anthropogenic eutrophication, shelter area, breeding grounds, and as a link between benthic-pelagic. In addition, high Crassostrea communities can form reefs and serve as ecologically important for diverse species.Keywords:Marine BivalvesCommunity Anthropogenic EcosystemsFunctiona
Analisis Kelimpahan Mikroplastik Pada Lima Spesies Ikan Laut Dari TPI Pantai Labu, Kecamatan Pantai Labu Kabupaten Deli Serdang
Full text linkPenelitian ini bertujuan untuk mengidentifikasi bentuk, warna, dan kelimpahan mikroplastik pada lima spesies ikan (Rastrelliger kanagurta, Nemipterus japonicus, Sardinella fimbriata, Megalaspis cordyla, Eleutheronema tetradactylum). Penelitian ini dilakukan dari Juni hingga Agustus 2025, dimana sampel diperoleh dari TPI Pantai Labu. Analisis mikroplastik dilakukan di laboratorium Biologi, FMIPA Universitas Negeri Medan. Proses ekstraksi mikroplastik dimulai dengan memasukkan organ ikan target kedalam larutan H2O2 30% sebanyak 20 ml dan FeSO4 0,05M sebanyak 5 tetes kemudian diinkubasi selama 24 jam pada suhu 40ºC. Selanjutnya organ ikan yang telah terurai disaring menggunakan Whatman, dibilas menggunakan larutan NaCl jenuh, dan hasil saringan ditampung ke dalam cawan petri. Sampel yang telah dikeringkan selanjutnya diamati menggunakan mikroskop stereo. Hasil analisis mikroplastik pada lima spesies ikan menunjukkan kontaminasi, dengan nilai kelimpahan total tertinggi pada spesies Rastrelliger kanagurta (58,7 partikel/individu), diikuti Megalaspis cordyla (44,3), Sardinella fimbriata (31,5), Eleutheronema tetradactylum (29,6), dan Nemipterus japonicus (29,3 partikel/individu). Hasil analisis mikroplastik menunjukkan bentuk mikroplastik yang ditemukan terdiri atas tiga bentuk, yaitu fiber, fragmen, dan film dengan dominasi bentuk fiber dan warna hitam pada seluruh spesies ikan. Selanjutnya hasil uji one way ANOVA menunjukkan bahwa jenis ikan berpengaruh nyata terhadap kelimpahan mikroplastik (p 0,05), di mana R. kanagurta berbeda signifikan dengan N. japonicus, S. fimbriata, dan E. tetradactylum, sedangkan ketiga spesies terakhir tidak berbeda nyata satu sama lai
Pembuatan Pakan Maggot Menggunakan Mesin Pembubur Sampah Organik
Full text linkMaggot menjadi trend usaha rumahan karena mudah dilakukan dan biaya yang murah. Selain bernilai ekonomis, usaha maggot memiliki dampak yang baik bagi lingkungan, khususnya pada penanganan masalah sampah organik terhadap lingkungan. Potensi utama dari budidaya maggot adalah ketersediaan sumber pakan dan permintaan pakan ternak dari maggot. Adapun salah satu usaha budidaya maggot dilakukan oleh Magot Mulia Mandiri di Desa Pematang Johar. Dalam menjalankan usahanya, Magot Mulia Mandiri menggunakan sampah organik pasar dan rumahan yang dicincang secara manual dengan pisau untuk pakan maggot. Hasil pakan yang diperoleh dari sampah organik ini bersifat kasar dan keras sehingga sulit dikonsumi dan dicerna oleh maggot. Dampaknya, maggot yang dihasilkan berukuran relatif kecil karena penyerapan nutrisi yang tidak optimal dan nafsu makan yang menurun. Sifat makan Maggot dilakukan dengan cara menghisap sehingga diperlukan pakan yang lembut. Pakan yang lembut dapat diperoleh dengan menggiling sampah organik menggunakan mesin pembubur, namun hal ini belum dilakukan oleh pembudidaya maggot. Oleh karena itu, tujuan dari kegiatan ini adalah untuk melatih mitra dalam memproduksi pakan mandiri maggot menggunakan mesin pembubur agar diperoleh pakan yang lembut. Metode pelaksanaan menggunakan Teknik presentasi, tanya-jawab, diskusi, demonstrasi, dan unjuk kerja. Hasil kegiatan diperoleh pakan maggot yang lembut sesuai kebutuhan, sehingga dapat diberikan tanpa harus melalui proses fermentasi. Pada aspek hasil pelatihan terhadap kualitas kegiatan pelatihan diperoleh nilai rata-rata 3,77 dan tingkat pengetahuan mitra memperoleh nilai rata-rata 3,80 dari nilai maksimum 4,00. Hal ini menunjukkan bahwa kualitas kegiatan dapat dikatakan baik dan terdapat peningkatan pengetahuan mitra dalam budidaya maggot. Terjadi peningkatan juga pada aspek keterampilan peserta berdasarkan hasil observasi dan produk yang dihasilkan, dimana peserta dapat memproduksi pakan menggunakan mesin pembubur
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
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