1,721,055 research outputs found
Reproductive success of stickleback lateral plate morphs
No full textReproductive success of threespine stickleback plate morphs (complete, low and partially plated) acclimated to ambient or +4°C sea water temperatures, and allowed to mate freely within large outdoor mesocosms set to either ambient or +4°C. The number of genotyped larvae assigned to each couple, total number of larvae in the clutch and reproductive success are given
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
Growth, survival and morphometrics of intergenerational response to temperature variation in threespine stickleback (Gasterosteus aculeatus)
No full textData gathered for a split-clutch experiment on intergenerational response to temperature variation in threespine stickleback (Gasterosteus aculeatus) between May-Nov 2021, at the laboratory in the Wadden Sea Station, Sylt (Germany; 55.020993, 8.437764). Parents were exposed to one of three temperature treatments (constant temperature, natural temperature variation, and increased temperature variation) for 2 months and then bred; clutches were split between the same three temperature treatments and monitored for 90 days post-hatch. Various characteristics were measured to assess the impact and interaction of both parent and offspring temperature variation treatment on offspring growth, survival, and development. Data include standard lengths of parent (n=92) and offspring (n=760) fish (collected using digital measurement of calibrated photographs), timing of breeding events, clutch and egg size, survival of offspring fish over 90 days post-hatch, morphological landmarks for morphometric analysis of offspring fish, and hourly temperatures of treatment conditions
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
Stickleback (Gasterosteus aculeatus) marine heatwave experiment: F0 adult size and fecundity traits, F1 offspring growth, behavior and survival, and F2 offspring egg size, clutch size, and hatchling length
No full textThe data contains information about marine stickleback (Gasterosteus aculeatus) used in a multi-generation laboratory breeding experiment investigating the effects of heatwaves on marine species. Adult stickleback were caught by trawling in the Sylt-Romo Bight (Lat: 55.0252; Long: 8.436) between 3 Feb and 10 March 2022. Fish were brought to the laboratory at the AWI Wadden Sea Station Sylt and used as breeding adults for a multi-generation laboratory experiment investigating the effects of marine heatwaves on stickleback fitness-related traits. These F0 generation wild-caught adults (males and females) were acclimated to three heatwave scenarios (no heatwave control, single heatwave or double heatwave) for three months before breeding (starting 12 June 2022) via artificial fertilization. We measured several fecundity traits for each clutch of fertilized eggs including clutch size (total number of eggs), average egg size (diameter (mm)), fertilization success and hatching success. The diameter (mm) of all eggs in a clutch was measured to estimate average egg size. Each clutch of fertilized eggs was then split among the same three heatwave scenarios, and growth of the F1 offspring in the 9 heatwave treatment combinations was assessed at hatching, 30 days, 60 days and 90 days post-hatch. F1 offspring were also used to estimate two behavior traits (activity rate and exploration), and both short-term (up to 90 days post-hatch) and long-term (until F1 adult breeding) survival. When F1 offspring were ca. two years old, they were used as breeding adults (between 19 April- 28 May 2024) for the F2 generation, and the same fecundity traits as in the F0 were measured (clutch size, average egg size, fertilization success, hatching success), as well as F2 hatchling size
Long-term survival of Gasterosteus aculeatus F1 offspring throughout the 2 year experiment (at 409, 611 and 717 days post-hatch) depending on parent and offspring heatwave treatment
No full textLong-term survival of F1 offspring throughout the 2 year experiment (at 409, 611 and 717 days post-hatch) depending on parent and offspring heatwave treatmen
Short-term survival of Gasterosteus aculeatus F1 offspring during the 90 day growth experiment depending on parent and offspring (beaker) heatwave treatment
No full textShort-term survival of F1 offspring during the 90 day growth experiment depending on parent and offspring (beaker) heatwave treatmen
Length and weight of F0 wild-caught adults Gasterosteus aculeatus (males and females) used for breeding in heatwave experiment
No full textFish were brought to the laboratory at the AWI Wadden Sea Station Sylt and used as breeding adults for a multi-generation laboratory experiment investigating the effects of marine heatwaves on stickleback fitness-related traits. These F0 generation wild-caught adults (males and females) were acclimated to three heatwave scenarios (no heatwave control, single heatwave or double heatwave) for three months before breeding (starting 12 June 2022) via artificial fertilization
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