Salinity of incubation media influences embryonic development of a freshwater turtle

Deborah BOWER, Arthur GEORGES

    Research output: Contribution to journalArticle

    5 Citations (Scopus)

    Abstract

    Variations in water potential have marked effects on aspects of embryological development in reptiles. Therefore variation in the salinity of the incubation environment is likely to have significant consequences on the early life stage. The combination of an extended incubation period, coupled with the real threat of soil salinisation within their range makes Chelodina expansa an ideal model to assess the influence of salinity on turtle embryology. We quantified the influence of salt on the development of C. expansa hatchlings in four substrate treatments varying in salinity. Embryos incubated in higher salinities had 39 % less survival than those incubated in substrates with freshwater. Hatchlings that emerged from eggs in saline treatments were smaller with higher concentrations of plasma sodium, chloride, urea, and potassium. The physiological effects of salinity mirror those of turtles incubated in drier media with low water potential. Salinisation of river banks has the potential to reduce hatching success and fitness of nesting reptiles.
    Original languageEnglish
    Pages (from-to)235-241
    Number of pages7
    JournalJournal of Comparative Physiology Series B
    Volume183
    DOIs
    Publication statusPublished - 2013

    Fingerprint

    Turtles
    Salinity
    embryonic development
    Fresh Water
    turtle
    turtles
    Embryonic Development
    embryogenesis
    incubation
    salinity
    Banks (bodies of water)
    Water
    Substrates
    soil salinization
    Sodium Chloride
    Reptiles
    Urea
    salinization
    Potassium
    Mirrors

    Cite this

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    title = "Salinity of incubation media influences embryonic development of a freshwater turtle",
    abstract = "Variations in water potential have marked effects on aspects of embryological development in reptiles. Therefore variation in the salinity of the incubation environment is likely to have significant consequences on the early life stage. The combination of an extended incubation period, coupled with the real threat of soil salinisation within their range makes Chelodina expansa an ideal model to assess the influence of salinity on turtle embryology. We quantified the influence of salt on the development of C. expansa hatchlings in four substrate treatments varying in salinity. Embryos incubated in higher salinities had 39 {\%} less survival than those incubated in substrates with freshwater. Hatchlings that emerged from eggs in saline treatments were smaller with higher concentrations of plasma sodium, chloride, urea, and potassium. The physiological effects of salinity mirror those of turtles incubated in drier media with low water potential. Salinisation of river banks has the potential to reduce hatching success and fitness of nesting reptiles.",
    keywords = "Salt, Egg, Developmental plasticity, Hydric, Moisture.",
    author = "Deborah BOWER and Arthur GEORGES",
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    language = "English",
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    Salinity of incubation media influences embryonic development of a freshwater turtle. / BOWER, Deborah; GEORGES, Arthur.

    In: Journal of Comparative Physiology Series B, Vol. 183, 2013, p. 235-241.

    Research output: Contribution to journalArticle

    TY - JOUR

    T1 - Salinity of incubation media influences embryonic development of a freshwater turtle

    AU - BOWER, Deborah

    AU - GEORGES, Arthur

    PY - 2013

    Y1 - 2013

    N2 - Variations in water potential have marked effects on aspects of embryological development in reptiles. Therefore variation in the salinity of the incubation environment is likely to have significant consequences on the early life stage. The combination of an extended incubation period, coupled with the real threat of soil salinisation within their range makes Chelodina expansa an ideal model to assess the influence of salinity on turtle embryology. We quantified the influence of salt on the development of C. expansa hatchlings in four substrate treatments varying in salinity. Embryos incubated in higher salinities had 39 % less survival than those incubated in substrates with freshwater. Hatchlings that emerged from eggs in saline treatments were smaller with higher concentrations of plasma sodium, chloride, urea, and potassium. The physiological effects of salinity mirror those of turtles incubated in drier media with low water potential. Salinisation of river banks has the potential to reduce hatching success and fitness of nesting reptiles.

    AB - Variations in water potential have marked effects on aspects of embryological development in reptiles. Therefore variation in the salinity of the incubation environment is likely to have significant consequences on the early life stage. The combination of an extended incubation period, coupled with the real threat of soil salinisation within their range makes Chelodina expansa an ideal model to assess the influence of salinity on turtle embryology. We quantified the influence of salt on the development of C. expansa hatchlings in four substrate treatments varying in salinity. Embryos incubated in higher salinities had 39 % less survival than those incubated in substrates with freshwater. Hatchlings that emerged from eggs in saline treatments were smaller with higher concentrations of plasma sodium, chloride, urea, and potassium. The physiological effects of salinity mirror those of turtles incubated in drier media with low water potential. Salinisation of river banks has the potential to reduce hatching success and fitness of nesting reptiles.

    KW - Salt

    KW - Egg

    KW - Developmental plasticity

    KW - Hydric

    KW - Moisture.

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    DO - 10.1007/s00360-012-0695-2

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