1,720,958 research outputs found
Chemotaxis and phonotaxis in a two-choice shuttle tank by bigheaded carps
No full textWorking copy at https://github.com/genderfish/bigheadedDissolved carbon dioxide avoidance in silver and bighead carps. Additionally, carp were conditioned to associate broadband sound from outboard boat motors (0.06 – 10 kHz, ~150 dB re 1 μPa) with CO2 application (~35,000 ppm). Phonotaxis trials were conducted over one to four weeks in a both a small (80 L) and large (3475 L) two-choice shuttle tank.Culotta, Jackie; Vetter, Brooke, J; Mensinger, Allen, F; Kramer, Cassandra, A; Ervin, Marie, L. (2023). Chemotaxis and phonotaxis in a two-choice shuttle tank by bigheaded carps. Retrieved from the University Digital Conservancy, https://doi.org/10.13020/wzpt-t493
Seasonal Changes in Male Oyster Toadfish’s Response to Boatwhistle Playbacks
No full textBiology- Ecology, Evolution and Behavior
Professional Writing Minor
Swenson College of Science and EngineeringOpasanus tau, the Oyster Toadfish inhabits estuaries along the Atlantic coast. Males produce a short, harmonic mating call titled a 'boatwhistle' to attract females from late May to early August. A hydrophone was deployed under the dock at the Marine Biological Laboratory in Woods Hole Massachusetts to passively monitor their mating behavior. An underwater speaker played boatwhistles at the toadfish at varied times throughout the day and season to determine the male response to hearing extraneous noise.University of Minnesota's Undergraduate Research Opportunities Program, Research Experience for Undergraduates programCurtis, Nora J; Mackiewicz, Alayna G; Putland, Rosalyn L; Mensinger, Allen F. (2020). Seasonal Changes in Male Oyster Toadfish’s Response to Boatwhistle Playbacks. Retrieved from the University Digital Conservancy, https://hdl.handle.net/11299/212339
Evaluating CO2 and sound as an invasive bigheaded carp deterrent in a model lock and dam
No full textAn experimental dataset was collected to evaluate the effectiveness of using CO2 and sound to restrict the upstream passage of invasive bigheaded carp in a model lock and dam system.
This dataset includes observation day data, sound trial data, conditioning data, sound map data, velocity data, fish tracking map data, and habituation data.Several deterrents are currently being investigated to block the upstream migration of invasive silver (Hypophthalmichthys molitrix) and bighead carp (H. nobilis). Broadband sound (100 hp outboard boat motor recording) and dissolved CO2 both show potential for restricting the upstream movement of invasive bigheaded carp through contained environments such as lock chambers. This study examined the effect of combining both broadband sound and CO2 into a multimodal deterrent to restrict upstream passage via the lock chamber in a 10,000 L flow through model lock and dam system. Bigheaded carp schools were classically conditioned to associate broadband sound with elevated levels of CO2 in the lock chamber. After conditioning, broadband sound alone was 100% effective in restricting the upstream passage of bigheaded carp under standard lock chamber operations, and bigheaded carp were deterred from entering and transiting the lock chamber for 28 consecutive trials over a one-week period. These results could help inform field deployments of non-physical deterrents within lock chambers for restricting the upstream movement of invasive bigheaded carp.Funding for this research was provided by the Minnesota Environment and Natural Resources Trust Fund (ENRTF) as recommended by the Minnesota Aquatic Invasive Species Research Center (MAISRC) and the Legislative-Citizen Commission on Minnesota Resources (LCCMR); and the State of Minnesota.Frett, Michael W; Mensinger, Allen F; Berry, Amelia L; Kozarek, Jessica L. (2025). Evaluating CO2 and sound as an invasive bigheaded carp deterrent in a model lock and dam. Retrieved from the Data Repository for the University of Minnesota (DRUM), https://doi.org/10.13020/QY7Q-0N68
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Get PDFWe 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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