Early developmental arrest during immersion of eggs of a tropical freshwater turtle, chelodina rugosa (Testudinata

Chelidae), from northern Australia

Rod Kennett, Arthur Georges, Mike Palmer.Allen

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    Freshly laid eggs of Chelodina rugosa survived for up to 12 weeks when immersed in water and subsequently underwent successful incubation and normal hatching. Embryonic development was arrested during immersion, remained arrested in an atmosphere of nitrogen, and recommenced when eggs were exposed to air. The hypoxic conditions during immersion appear to extend the arrest typical of turtle embryos during their period in the oviducts. Freshly laid eggs of the temperate.zone C. longicollis died when immersed for longer than one week and eggs of both species died when immersed after post.laying embryonic development had commenced. These results, supported by anecdoctal and experimental evidence, suggest that C. rugosa lays its eggs in saturated or flooded ground in the late wet or early dry monsoonal season. Embryonic development presumably remains arrested until water levels drop and oxygen tensions in the nest rise by diffusion through the drying soil. Partly developed embryos in nests that are flooded after laying would perish. In contrast, C. longicollis of temperate Australia nests only in relatively dry substrates, and its eggs appear not be have evolved the capacity to withstand immersion.

    Original languageEnglish
    Pages (from-to)37-45
    Number of pages9
    JournalAustralian Journal of Zoology
    Volume41
    Issue number1
    DOIs
    Publication statusPublished - 1993

    Fingerprint

    Chelidae
    turtle
    turtles
    embryogenesis
    nests
    egg
    embryo (animal)
    embryonic development
    nest
    oviducts
    anaerobic conditions
    surface water level
    embryo
    dry season
    hatching
    drying
    oxygen
    air
    nitrogen
    Testudinata

    Cite this

    @article{665241d0e5cc4674b83bf2a83776c456,
    title = "Early developmental arrest during immersion of eggs of a tropical freshwater turtle, chelodina rugosa (Testudinata: Chelidae), from northern Australia",
    abstract = "Freshly laid eggs of Chelodina rugosa survived for up to 12 weeks when immersed in water and subsequently underwent successful incubation and normal hatching. Embryonic development was arrested during immersion, remained arrested in an atmosphere of nitrogen, and recommenced when eggs were exposed to air. The hypoxic conditions during immersion appear to extend the arrest typical of turtle embryos during their period in the oviducts. Freshly laid eggs of the temperate.zone C. longicollis died when immersed for longer than one week and eggs of both species died when immersed after post.laying embryonic development had commenced. These results, supported by anecdoctal and experimental evidence, suggest that C. rugosa lays its eggs in saturated or flooded ground in the late wet or early dry monsoonal season. Embryonic development presumably remains arrested until water levels drop and oxygen tensions in the nest rise by diffusion through the drying soil. Partly developed embryos in nests that are flooded after laying would perish. In contrast, C. longicollis of temperate Australia nests only in relatively dry substrates, and its eggs appear not be have evolved the capacity to withstand immersion.",
    author = "Rod Kennett and Arthur Georges and Mike Palmer.Allen",
    note = "cited By 40",
    year = "1993",
    doi = "10.1071/ZO9930037",
    language = "English",
    volume = "41",
    pages = "37--45",
    journal = "Australian Journal of Zoology",
    issn = "0004-959X",
    publisher = "CSIRO",
    number = "1",

    }

    TY - JOUR

    T1 - Early developmental arrest during immersion of eggs of a tropical freshwater turtle, chelodina rugosa (Testudinata

    T2 - Chelidae), from northern Australia

    AU - Kennett, Rod

    AU - Georges, Arthur

    AU - Palmer.Allen, Mike

    N1 - cited By 40

    PY - 1993

    Y1 - 1993

    N2 - Freshly laid eggs of Chelodina rugosa survived for up to 12 weeks when immersed in water and subsequently underwent successful incubation and normal hatching. Embryonic development was arrested during immersion, remained arrested in an atmosphere of nitrogen, and recommenced when eggs were exposed to air. The hypoxic conditions during immersion appear to extend the arrest typical of turtle embryos during their period in the oviducts. Freshly laid eggs of the temperate.zone C. longicollis died when immersed for longer than one week and eggs of both species died when immersed after post.laying embryonic development had commenced. These results, supported by anecdoctal and experimental evidence, suggest that C. rugosa lays its eggs in saturated or flooded ground in the late wet or early dry monsoonal season. Embryonic development presumably remains arrested until water levels drop and oxygen tensions in the nest rise by diffusion through the drying soil. Partly developed embryos in nests that are flooded after laying would perish. In contrast, C. longicollis of temperate Australia nests only in relatively dry substrates, and its eggs appear not be have evolved the capacity to withstand immersion.

    AB - Freshly laid eggs of Chelodina rugosa survived for up to 12 weeks when immersed in water and subsequently underwent successful incubation and normal hatching. Embryonic development was arrested during immersion, remained arrested in an atmosphere of nitrogen, and recommenced when eggs were exposed to air. The hypoxic conditions during immersion appear to extend the arrest typical of turtle embryos during their period in the oviducts. Freshly laid eggs of the temperate.zone C. longicollis died when immersed for longer than one week and eggs of both species died when immersed after post.laying embryonic development had commenced. These results, supported by anecdoctal and experimental evidence, suggest that C. rugosa lays its eggs in saturated or flooded ground in the late wet or early dry monsoonal season. Embryonic development presumably remains arrested until water levels drop and oxygen tensions in the nest rise by diffusion through the drying soil. Partly developed embryos in nests that are flooded after laying would perish. In contrast, C. longicollis of temperate Australia nests only in relatively dry substrates, and its eggs appear not be have evolved the capacity to withstand immersion.

    UR - http://www.scopus.com/inward/record.url?scp=84971037735&partnerID=8YFLogxK

    U2 - 10.1071/ZO9930037

    DO - 10.1071/ZO9930037

    M3 - Article

    VL - 41

    SP - 37

    EP - 45

    JO - Australian Journal of Zoology

    JF - Australian Journal of Zoology

    SN - 0004-959X

    IS - 1

    ER -