1,720,956 research outputs found
Effects of stocking density on the survival, growth, size variation and condition index of juvenile rabbitfish Siganus rivulatus
No full textSpinefoot rabbitfish, Siganus rivulatus, is an economically important species of herbivorous fish that is relatively easy to rear and thus considered to be suitable for aquaculture. Juveniles are generally reared in nursery systems before being stocked into growout cages or ponds. We report here our evaluation of the effects of stocking density on the survival, growth, feed efficiency and condition index of S. rivulatus juveniles in nursery tanks. The experiment was conducted in a recirculating system of twelve 52-l aquaria connected to a biological filter and a sand filter. Juvenile fish (average weight 6.5 g) were stocked into aquaria at four stocking densities (10, 20, 30, and 40 fish-aquarium) with three replicate aquaria per treatment. Diet was provided at 3percent body weight daily divided into two feedings. Fish were weighed weekly for 8 weeks and the diet increased accordingly. Survival was greater than 95percent in all treatments, with no significant differences observed among treatments. There were also no differences in specific growth rate (SGR 2.12-2.27) of the fish among treatments. Growth rate was linear during the 8 weeks in all treatments, and harvested biomass increased proportionally to stocking density (198, 401, 600 and 785 g per increasing stocking density, respectively). Feed efficiency (FE 0.67-0.71) of the fish did not vary significantly among treatments. The coefficient of variation was high (35-41percent) among the harvested fish, but it also did not differ significantly among treatments. The final condition indices of the fish in all treatments were similar to each other but significantly greater than the initial values (P 0.05). The results suggest that there is no apparent effect of stocking density at the levels tested on the survival and growth of juvenile rabbitfish. © Springer Science+Business Media B.V. 2007.Anderson Richard O., 1996, P447; Barton BA, 1991, ANN REV FISH DIS, V10, P3; Ben-Tuvia A., 1973, Aquaculture, V1, P359; Ben-Tuvia A., 1985, MEDITERRANEAN MARINE, P367; Boudouresque C. F., 1999, Invasive species and biodiversity management. Based on papers presented at the Norway-United Nations (UN) Conference on Alien Species, 2nd Trondheim Conference on Biodiversity, Trondheim, Norway, 1-5 July 1996., P213; BRYAN PG, 1977, AQUACULTURE, V10, P243, DOI 10.1016-0044-8486(77)90005-9; Carr B.A., 1982, Journal of the World Mariculture Society, V13, P254; El-Sayed AFM, 2002, AQUAC RES, V33, P621, DOI 10.1046-j.1365-2109.2002.00700.x; Fishelson L, 2000, ITAL J ZOOL, V67, P393; Frechette M, 2005, AQUACULTURE, V250, P291, DOI 10.1016-j.aquaculture.2005.05.004; Galil Bella S., 2000, Biological Invasions, V2, P177, DOI 10.1023-A:1010057010476; George CJ, 1967, ANN MUS CIV STORIA N, V79, P32; Goldan O, 1997, AQUACULTURE, V152, P181, DOI 10.1016-S0044-8486(97)00001-X; Gomes LD, 2006, AQUACULTURE, V253, P374, DOI 10.1016-j.aquaculture.2005.08.020; HARA S, 1986, AQUACULTURE, V59, P259, DOI 10.1016-0044-8486(86)90008-6; Hecht Thomas, 1993, Journal of the World Aquaculture Society, V24, P246, DOI 10.1111-j.1749-7345.1993.tb00014.x; HOLM JC, 1990, AQUACULTURE, V89, P225, DOI 10.1016-0044-8486(90)90128-A; Huguenin JE, 1997, AQUACULT ENG, V16, P167, DOI 10.1016-S0144-8609(96)01018-7; JOBLING M, 1994, J FISH BIOL, V44, P1069, DOI 10.1111-j.1095-8649.1994.tb01277.x; JORGENSEN EH, 1993, AQUACULTURE, V110, P191, DOI 10.1016-0044-8486(93)90272-Z; JUARIO JV, 1985, AQUACULTURE, V44, P91, DOI 10.1016-0044-8486(85)90012-2; KJARTANSSON H, 1988, AQUACULTURE, V73, P261, DOI 10.1016-0044-8486(88)90060-9; KOEBELE BP, 1985, ENVIRON BIOL FISH, V12, P181, DOI 10.1007-BF00005149; LAM TJ, 1974, AQUACULTURE, V3, P325, DOI 10.1016-0044-8486(74)90001-5; Lambert Y, 2001, AQUACULTURE, V192, P233, DOI 10.1016-S0044-8486(00)00448-8; LUNDBERG B, 1979, BOT MAR, V22, P173, DOI 10.1515-botm.1979.22.3.173; Lundberg B., 1995, Marine Ecology, V16, P73, DOI 10.1111-j.1439-0485.1995.tb00395.x; MACINTOSH DJ, 1984, AQUACULTURE, V41, P345, DOI 10.1016-0044-8486(84)90202-3; PAPACONSTANTINOU C, 1990, Scientia Marina, V54, P313; PAPOUTSOGLOU S. E., 1990, ANIM SCI REV, V11, P73; Papoutsoglou SE, 1998, AQUACULT ENG, V18, P135, DOI 10.1016-S0144-8609(98)00027-2; PAPOUTSOGLOU SE, 1987, AQUACULTURE, V66, P9, DOI 10.1016-0044-8486(87)90279-1; PARAZO MM, 1990, AQUACULTURE, V86, P41, DOI 10.1016-0044-8486(90)90220-H; POPPER D, 1979, AQUACULTURE, V16, P177, DOI 10.1016-0044-8486(79)90149-2; POPPER D, 1975, AQUACULTURE, V6, P127, DOI 10.1016-0044-8486(75)90065-4; Popper D., 1973, Aquaculture, V2, P37, DOI 10.1016-0044-8486(73)90124-5; Por F. D., 1978, LESSEPSIAN MIGRATION; Quignard J.P., 2000, Biologia Marina Mediterranea, V7, P1; Saoud I. P., 2005, Journal of Applied Aquaculture, V17, P73, DOI 10.1300-J028v17n04_05; Steel RG, 1980, PRINCIPLES PROCEDURE; STEPHNOU D, 2000, RECENT EXPERIENCES C, P95; TORTONESE E, 1970, DORIANA, V4, P191; WALLACE JC, 1988, AQUACULTURE, V73, P101, DOI 10.1016-0044-8486(88)90045-2; WOODLAND DJ, 1983, B MAR SCI, V33, P71386
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
Seasonal variation in highly unsaturated fatty acid composition of muscle tissue of two fishes endemic to the Eastern Mediterranean
No full textFatty acid content and profile in muscle tissue of two commercially important fishes from the Eastern Mediterranean were analyzed. One fish, Siganus rivulatus or rabbitfish, is an herbivore while the other fish, Diplodus sargus or white sea-bream, is a carnivore. Our aim was to evaluate changes in health benefits to consumers of said fishes among seasons and among species with different diets. Total fat content of the muscle in both fishes was low, being highest in August for the rabbitfish (3.31g per 100 g wet tissue) and in October for the white sea-bream (2.27 g per 100 g). Omega-3 and omega-6 highly unsaturated fatty acids (HUFA) as a proportion of total lipids also varied with season in both fishes. The total amount of lipid consumed per weight of tissue varied monthly among the species and one species is not necessarily better than another all year. However, on average, a person that consumes only rabbitfish throughout the year will eat more marine lipid than a consumer that eats only white sea-bream. Nonetheless, both species studied supply essential ω-3 and -6 HUFA. The ω-6:ω-3 ratio in fish in the present work was generally less than 2.0, but a diet that includes these fishes supplemented with some vegetable oil would raise the ratio to the recommended value of 4 to 6.Ackman R.G., 1989, MARINE BIOGENIC LIPI, P145; AHLGREN G, 1994, J FISH BIOL, V45, P131, DOI 10.1111-j.1095-8649.1994.tb01292.x; AMIN EM, 1984, B FS ALEXANDRIA U, V24, P154; Bang HO, 1980, ADV NUTR RES, P1; Bell JG, 2003, AQUACULTURE, V218, P491, DOI 10.1016-S0044-8486(02)00370-8; Blanchet C, 2000, CAN J DIET PRACT RES, V61, P50; Bourre J M, 2004, J Nutr Health Aging, V8, P163; Budge SM, 2002, CAN J FISH AQUAT SCI, V59, P886, DOI 10.1139-F02-062; COOK HW, 1985, BIOCH LIPIDS MEMBRAN, P181; HACUNDA JS, 1981, FISH B-NOAA, V79, P775; HAMMOUD V, 2002, THESIS DEP BIOL TISH; Hazra AK, 1998, J AM OIL CHEM SOC, V75, P1673, DOI 10.1007-s11746-998-0110-z; Holub BJ, 2002, CAN MED ASSOC J, V166, P608; HUSSEIN KA, 1986, B I OCEANOGRAPHY FIS, V12, P175; Innis SM, 2003, AM J CLIN NUTR, V77, P473; Iverson SJ, 2002, MAR ECOL PROG SER, V241, P161, DOI 10.3354-meps241161; LIE D, 2004, NEUROLOGY, V62, P275; Liu CP, 2001, BOT BULL ACAD SINICA, V42, P207; Logan MS, 2000, BIOL J LINN SOC, V69, P599, DOI 10.1111-j.1095-8312.2000.tb01225.x; Lovell T., 1998, NUTR FEEDING FISH; Lundberg B., 1995, Marine Ecology, V16, P73, DOI 10.1111-j.1439-0485.1995.tb00395.x; MONTEVECCHI WA, 1984, COMP BIOCHEM PHYS A, V78, P15, DOI 10.1016-0300-9629(84)90084-7; Ogata HY, 2004, AQUACULTURE, V236, P361, DOI 10.1016-j.aquaculture.2003.10.015; Robards MD, 1999, J FISH BIOL, V54, P1050, DOI 10.1111-j.1095-8649.1999.tb00857.x; Robin JH, 2003, AQUACULTURE, V225, P283, DOI 10.1016-S0044-8486(03)00296-5; ROSS ST, 1977, COPEIA, P561, DOI 10.2307-1443277; Simopoulos AP, 2002, BIOMED PHARMACOTHER, V56, P365, DOI 10.1016-S0753-3322(02)00253-6; Skalli A, 2004, AQUACULTURE, V240, P399, DOI 10.1016-j.aquaculture.2004.06.036; Soriguer F, 1997, EUR J EPIDEMIOL, V13, P451, DOI 10.1023-A:1007327304925; Stansby M. E., 1990, FISH OILS NUTR, P6; Steffens W, 1997, AQUACULTURE, V151, P97, DOI 10.1016-S0044-8486(96)01493-7; Varljen J, 2005, J FOOD LIPIDS, V12, P286, DOI 10.1111-j.1745-4522.2005.00024.x; Varljen J, 2003, FOOD TECHNOL BIOTECH, V41, P149; Wijendran V, 2004, ANNU REV NUTR, V24, P597, DOI 10.1146-annurev.nutr.24.012003.132106; Yehuda S, 2002, NEUROBIOL AGING, V23, P843, DOI 10.1016-S0197-4580(02)00074-X53
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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