Modelling Development of Reptile Embryos under Fluctuating Temperature Regimes

Arthur Georges, Kerry Beggs, Jeanne Young, Sean Doody

    Research output: Contribution to journalArticle

    97 Citations (Scopus)

    Abstract

    An increase in temperature, within bounds, will accelerate development of reptile embryos, and morphogenesis can be normal over a range of temperatures despite those varying rates of development. Less well understood is the form of the relationship that best describes variation in developmental rate with temperature. In this article, we apply a linear degree.hour model, an empirical curvilinear model, a biophysical model, and a polynomial model to data on rates of embryonic development and temperature in the pig‐nosed turtle Carettochelys insculpta from northern Australia. The curvilinear models, which have been applied with success to development of insects, describe the embryonic development of turtles well. When fluctuating temperatures extend beyond the constant temperatures that support successful incubation, the curvilinear models continue to perform well, whereas the linear model predictions fail. Sensitivity analysis indicates that under some circumstances, incubation duration may be increased by diel temperature fluctuations, independent of an influence of mean temperature. In other circumstances, incubation duration may be decreased, and in still other circumstances, diel temperature fluctuations will have no impact on incubation duration. This adds an additional dimension to our understanding of how thermal regimes can be selected or manipulated by reptiles to optimise incubation duration and the timing of offspring emergence.

    Original languageEnglish
    Pages (from-to)18-30
    Number of pages13
    JournalPhysiological and Biochemical Zoology
    Volume78
    Issue number1
    Publication statusPublished - 2005

    Fingerprint

    Reptiles
    reptiles
    Embryonic Development
    embryo (animal)
    Temperature
    temperature
    Turtles
    duration
    turtles
    embryogenesis
    insect development
    Statistical Models
    Morphogenesis
    Sensitivity analysis
    morphogenesis
    Insects
    eclosion
    Linear Models
    Hot Temperature
    linear models

    Cite this

    Georges, Arthur ; Beggs, Kerry ; Young, Jeanne ; Doody, Sean. / Modelling Development of Reptile Embryos under Fluctuating Temperature Regimes. In: Physiological and Biochemical Zoology. 2005 ; Vol. 78, No. 1. pp. 18-30.
    @article{1cfda715efaf40279fa475886ff75a7e,
    title = "Modelling Development of Reptile Embryos under Fluctuating Temperature Regimes",
    abstract = "An increase in temperature, within bounds, will accelerate development of reptile embryos, and morphogenesis can be normal over a range of temperatures despite those varying rates of development. Less well understood is the form of the relationship that best describes variation in developmental rate with temperature. In this article, we apply a linear degree.hour model, an empirical curvilinear model, a biophysical model, and a polynomial model to data on rates of embryonic development and temperature in the pig‐nosed turtle Carettochelys insculpta from northern Australia. The curvilinear models, which have been applied with success to development of insects, describe the embryonic development of turtles well. When fluctuating temperatures extend beyond the constant temperatures that support successful incubation, the curvilinear models continue to perform well, whereas the linear model predictions fail. Sensitivity analysis indicates that under some circumstances, incubation duration may be increased by diel temperature fluctuations, independent of an influence of mean temperature. In other circumstances, incubation duration may be decreased, and in still other circumstances, diel temperature fluctuations will have no impact on incubation duration. This adds an additional dimension to our understanding of how thermal regimes can be selected or manipulated by reptiles to optimise incubation duration and the timing of offspring emergence.",
    author = "Arthur Georges and Kerry Beggs and Jeanne Young and Sean Doody",
    year = "2005",
    language = "English",
    volume = "78",
    pages = "18--30",
    journal = "Physiological Zoology",
    issn = "0031-935X",
    publisher = "University of Chicago",
    number = "1",

    }

    Modelling Development of Reptile Embryos under Fluctuating Temperature Regimes. / Georges, Arthur; Beggs, Kerry; Young, Jeanne; Doody, Sean.

    In: Physiological and Biochemical Zoology, Vol. 78, No. 1, 2005, p. 18-30.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Modelling Development of Reptile Embryos under Fluctuating Temperature Regimes

    AU - Georges, Arthur

    AU - Beggs, Kerry

    AU - Young, Jeanne

    AU - Doody, Sean

    PY - 2005

    Y1 - 2005

    N2 - An increase in temperature, within bounds, will accelerate development of reptile embryos, and morphogenesis can be normal over a range of temperatures despite those varying rates of development. Less well understood is the form of the relationship that best describes variation in developmental rate with temperature. In this article, we apply a linear degree.hour model, an empirical curvilinear model, a biophysical model, and a polynomial model to data on rates of embryonic development and temperature in the pig‐nosed turtle Carettochelys insculpta from northern Australia. The curvilinear models, which have been applied with success to development of insects, describe the embryonic development of turtles well. When fluctuating temperatures extend beyond the constant temperatures that support successful incubation, the curvilinear models continue to perform well, whereas the linear model predictions fail. Sensitivity analysis indicates that under some circumstances, incubation duration may be increased by diel temperature fluctuations, independent of an influence of mean temperature. In other circumstances, incubation duration may be decreased, and in still other circumstances, diel temperature fluctuations will have no impact on incubation duration. This adds an additional dimension to our understanding of how thermal regimes can be selected or manipulated by reptiles to optimise incubation duration and the timing of offspring emergence.

    AB - An increase in temperature, within bounds, will accelerate development of reptile embryos, and morphogenesis can be normal over a range of temperatures despite those varying rates of development. Less well understood is the form of the relationship that best describes variation in developmental rate with temperature. In this article, we apply a linear degree.hour model, an empirical curvilinear model, a biophysical model, and a polynomial model to data on rates of embryonic development and temperature in the pig‐nosed turtle Carettochelys insculpta from northern Australia. The curvilinear models, which have been applied with success to development of insects, describe the embryonic development of turtles well. When fluctuating temperatures extend beyond the constant temperatures that support successful incubation, the curvilinear models continue to perform well, whereas the linear model predictions fail. Sensitivity analysis indicates that under some circumstances, incubation duration may be increased by diel temperature fluctuations, independent of an influence of mean temperature. In other circumstances, incubation duration may be decreased, and in still other circumstances, diel temperature fluctuations will have no impact on incubation duration. This adds an additional dimension to our understanding of how thermal regimes can be selected or manipulated by reptiles to optimise incubation duration and the timing of offspring emergence.

    M3 - Article

    VL - 78

    SP - 18

    EP - 30

    JO - Physiological Zoology

    JF - Physiological Zoology

    SN - 0031-935X

    IS - 1

    ER -