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General distribution of zooplankton in Turkish coast of the Black Sea and a study on egg production of Acartia clausi Giesbrecht, 1889 (Copepoda=Calanoida)
No full textMevcut çalışmada, Karadeniz'in Türkiye kıyılarındaki zooplanktonun dağlımı, kompozisyonu, bolluk ve biyokütle değerleri Haziran 2006, Ekim 2006 ve Mayıs 2007 tarihlerinde toplam 53 istasyonda araştırılmıştır. Zooplankton örneklemeleri, 112 ?m ağ göz ve 70 cm ağız açıklığına sahip Nansen tipi plankton kepçesi kullanılarak dikey çekim yöntemiyle gerçekleştirilmiştir. Zooplankton örneklerinin tüm örnekleme periyodu boyunca elde edilen toplam bolluk ve biyokütle değerleri Haziran 2006'da 92 888 birey/m3?8906 mg/m3, Ekim 2006'da 86 436 birey/m3?2743 mg/m3 ve Mayıs 2007 tarihinde 75 577 birey/m3?5104 mg/m3 olarak bulunmuştur. Zooplankton bolluk ve biyokütle değerleri Haziran ve Ekim ayında batı ve orta Karadeniz'de, Mayıs ayında ise doğu Karadeniz'de daha bol olduğu belirlenmiştir. Bolluk değerleri bakımından Copepoda Ekim (%82,3) ve Mayıs (%69,2) aylarında baskın grubu oluştururken, Noctiluca scintillans %49,7'lik oranıyla Haziran ayında bol olarak kaydedilmiştir. Biyokütle değerleri bakımından Haziran ayında N. scintillans (%45,6), Ekim ayında Copepoda (%43,8) ve Mayıs ayında ise Chaetognatha (%49,5) yüksek yüzdelik orana sahip oldukları belirlenmiştir. Sinop iç liman bölgesinde Acartia clausi türünün yumurta verimi oranları Ocak-Aralık 2008 tarihleri arasında ölçülmüştür. Araştırma süresince, günlük yumurta verimi genellikle düşük olup, 2,04±0,43'dan (20 Ekim) ile 19,41±1,73 (26 Mart) yumurta/dişi.gün değer aralıklarında bulunmuştur. Ortalama yumurta verimi oranı 8,62±1,02 yumurta/dişi.gün olarak kaydedilmiştir. Yumurta verimi oranının sıcaklık ve klorofil-a konsantrasyonu ile ilişkili olmadığı tespit edilmiştir.In the present study, distribution, composition, abundance and biomass values of zooplankton on Turkish coast of Black Sea were studied at a total of 53 stations in June 2006, October 2006 and May 2007. Zooplankton samplings were carried out vertically by using Nansen type plankton net with a 112 ?m mesh size and 70 cm diameter. Total abundance and biomass values of zooplankton samples obtained throughout the sampling period were found to be 92 888 ind/m3?8906 mg/m3 in June 2006, 86 436 ind/m3?2743 mg/m3 in October 2006 and 75 577 ind/m3?5104 mg/m3 in May 2007. Abundance and biomass values of zooplankton were determined to be high in May in the eastern Black Sea and in June and October in the western and central Black Sea. Copepoda was found to be dominant in October (82.3%) and May (69.2%) in terms of abundance whereas a relatively high percentage of 49.7% was recorded for Noctiluca scintillans in June. As for biomass, in June N. scintillans (45.6%), in October Copepoda (43.8%) and in May Chaetognatha (49.5%) was found to reveal high percentages. Egg production rates (EPR) of Acartia clausi were measured between January and December 2008 in Sinop Peninsula. During the study period EPR were found to be generally low varying between 2.04±0.43 (20 October) and 19.41±1.73 eggs/female.day (26 March). The mean EPR was recorded 8.62±102 egg/female.day. It was determined that egg production has a relationship neither with temperature nor with chlorophyll-a concentration
The Effect of different environments and water conditions on the growth of rainbow trout (Oncorhynchus mykiss W., 1792)
No full textAraştırmada, farklı ortam ve su koşullarının, gökkuşağı alabalığı fOncorhynchus mykiss W., 1792)' nın gelişmesine olan etkisi araştırılmıştır. Deneme; tathsu ve denizde, 2 tekerrürlü olarak 5 grupta yürütülmüştür. Tatlısuda yürütülen çalışmalar; beton havuzda (I. grup), fiber tanklarda (II. grup), toprak havuzlarda (III. grup) ve gölde ağ kafeslerde (IV. grup), denizde yürütülen çalışma ise ağ kafeslerde (V. grup) gerçekleştirilmiştir. Başlangıç ortalama ağırlıkları 101-103 g arasında değişen gökkuşağı alabalıkları, extrude yemle, canlı ağırlıklarının %1.5'i ile %2'si oranında 90 gün süreyle yemlenmişlerdir. Deneme süresince su sıcaklıkları tatlısuda ortalama 10.46±3.86 °C, denizde ise ortalama 10.16+3.49 °C olarak bulunmuştur. Deneme sonunda grupların ortalama canlı ağırlıkları sırasıyla, 260.54±5.55 g, 257.5±4.81 g, 260.47±5.16 g, 303.77±2.93 g ve 370.89±4.10 g olarak saptanmıştır. Tatlısudaki beton havuz ve toprak havuz grupları (I. ve III. gruplar) arasındaki farkm önemsiz (P>0.05), diğer gruplar arasındaki farklılıkların ise önemli olduğu belirlenmiştir (PO.05). Deneme sonunda gruplardaki spesifik büyüme oranlan sırasıyla, %1.04,% 1.02,%1.04, % 1.21 ve % 1.46 olarak tespit edilmiştir. Yem değerlendirme oranma ilişkin gruplardan elde edilen değerler sırasıyla, 1.47, 1.48,1.45,1.29 ve 1.12 olarak bulunmuş ve en iyi yem değerlendirmenin deniz ağ kafes grubunda (V. grup) olduğu görülmüştür. Deneme sonunda gruplardaki kondüsyon faktörü değerleri sırasıyla, 1.33,1.35,1.32, 1.23 ve 1.22, yaşama oranlan ise sırasıyla, %97, %96, %97.5, %91 ve %97.5 olarak belirlenmiştir.In this study, the effect of different environments and water conditions on the growth of rainbow trout (Oncorhynchus mykiss W.,1792) was investigated. The study was carried out in five groups with 2 replicates in fresh and seawater. The study was done in concrete tank (I. group), fiber tanks (II. group), earth ponds (III. group) and net cages in lake (IV. group) in fresh water and net cages (V. group) in seawater. The rainbow trout having average weight of 101-103 g at the beginning of the study were fed with extrude feed at rate of 1.5-2 % of body weight during 90 days. The average water temperature was 10.46±3.86 °C and 10.16±3.49 °C in fresh water and sea, respectively, during the study. The average weights of the groups were 260.54+5.55 g, 257.5±4.81 g, 260.47±5.16 g, 303.77±2.93 g and 370.8914.10 g, respectively, at the end of experiment. There were no significant differences between concrete and earth pond (I. and III. groups) (P>0.05) in fresh water, while the other groups were significantly differed from each other (P<0.05). At the end of experiment, the Spesific Growth Rates of the groups were 1.04, 1.02, 1.04, 1.21 and 1.46 %, respectively. The food conversion ratios were 1.47, 1.48, 1.45, 1.29 and 1.12, respectively and the best food conversion ratio was obtained in sea net cage group (V. groups. At the end of experiment, the condition fectors were 1.33, 1.35, 1.32, 1.23 and 1.22 and survival rates were 97, 96, 97.5, 91 and 97.5 %, respectively
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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