2,008 research outputs found

    Estimation of additive and non-additive effects in traits related to growth, adult size, fecundity and flight in the cricket : Gryllus firmus

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    Non-additive effects may affect the evolution of populations by lowering the heritability of the traits that they affect, thus causing inbreeding depression within populations and playing a role in the conversion of non-additive into additive variation during bottlenecks and in the evolution and maintenance of negative genetic correlations between traits (Crnokrak and Roff 1995, Wolf et al. 2000). Furthermore, dominance variance should be present to a greater degree in traits closer to fitness (Crnokrak and Roff 1995). This study uses diallel cross analyses of inbred lines of the sand cricket Gryllus firmus, to examine the sources of variation in weight at age, adult size, development time, fecundity and flight muscle weight and in particular the ratios of additive, dominance and maternal variance to total variance. We also examine the genetic relationships between the traits.Our study also examines the presence of maternal effects in growth traits and adult size in the sand cricket Gryllus firmus using diallel cross analyses of inbred lines

    Raw data ms Heredity

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    This dataset contains all data and information used in the statistical analysis related ti the manuscript entitled “Evolutionary potential of thermal traits in Drosophila subobscura: is there coadaptation between thermal preference and thermal tolerance” authored by Luis E. Castañeda, Valèria Romero-Soriano, Andres Mesas, Derek A. Roff and Mauro Santos

    Nobel Prize-winning Author Derek Walcott to Speak March 28

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    OXFORD, Miss. - Nobel Prize-winning author Derek Walcott is a featured lecturer March 28 at the University of Mississippi

    A conversation with Dr. Derek Schuurman about developing responsible technology

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    In this episode, I am joined by Dr. Derek Schuurman, professor of computer science at Calvin University and co-author of a new book entitled A Christian Field Guide to Technology for Engineers and Designers with IVP Academic. Today, we talk about how to responsibly develop technology in light of the Christian worldview

    Derek Mahon as translator

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    Derek Mahon has devoted much of his productive life to translation, especially from the French. This paper studies his handling of French texts, distinguishing those which he has freely recreated from those which he has assimilated to his own style and those where he has made himself subservient to the character of the original author. Attention is drawn to his inventiveness, his wit, his moderation and rationality, his concern for effective and relevant communication with the reader, his rhythmic sense and his concern for emphasis and coherence. It is argued that the practice of translation affords Mahon the opportunity to write "at one remove" from direct feeling, and in so doing to combine breadth of feeling and of cultural reference with self-awareness and self-discipline

    Interview with Derek Nikitas, part 1 of 2 [video]

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    Derek Nikitas is a faculty member in the Creative Writing MFA Program and author of two recent mystery novels, The Long Division (2009) and Pyres (2007). Nikitas\u27 first novel was nominated for the prestigious Edgar award, and has been optioned for film adaptation by Vox3 Films. His second novel, The Long Division, is receiving rave reviews

    Interview with Derek Nikitas, part 2 of 2 [video]

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    Derek Nikitas is a faculty member in the Creative Writing MFA Program and author of two recent mystery novels, The Long Division (2009) and Pyres (2007). Nikitas\u27 first novel was nominated for the prestigious Edgar award, and has been optioned for film adaptation by Vox3 Films. His second novel, The Long Division, is receiving rave reviews

    Conroy Roff Behaviorl Ecology DRYAD data

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    Contains ovary and flight muscle masses for Gryllus firmus female crickets as a function of exposure to male chirp

    A critical edition of Derek Walcott's Omeros

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    The thesis is a Critical Edition of Derek Walcott’s Omeros, consisting of a Critical Introduction and Annotations. The Critical Introduction analyses: - Narrative - Settings - Metaphor and Paronomasia - Symbolism - Historiography - Intertexts - Dualism - Autobiography - Dialects - Prosody. The Annotations comment on more than 1000 references that may be obscure and on specifics of narrative, language and prosody. This study presents new conclusions about some aspects of Omeros: - It challenges the prevailing view that the work is written substantially in a variation of terza rima and shows that regular quatrains predominate. - It demonstrates ways in which the metrics follow the sense of the narrative and takes a more balanced position on the use of Caribbean as opposed to classical metrics than that put forward previously. - It identifies a paragraphic structure to the verse. - It proposes a new prosodic structure for the significant Chapter XXX/iii. - It extends Walcott’s recognised use of numerology into word counting the names of characters. - It develops the idea of Walcott’s dualism and his use of pairing and contradiction as a dialectical method. - It defines his wide use of paronomasia and shows that many of the puns have a metaphorical aspect beyond mere word-play. - It analyses some of Walcott’s symbolism. - It identifies intertextual links to his earlier works and to some thirty other writers, and suggests homage to Hemingway and possibly Heaney. - It provides the first complete analysis of Walcott’s rhyme types in Omeros. In its analysis of Omeros and in the Annotations it has included commentary from across the critical literature, to provide some sense of other views on Walcott’s writing, and has included as many as possible of Walcott’s own comments on Omeros and on the writer’s task, as a background to understanding the poem
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