Chelodina expansa Gray 1857

Broad-Shelled Turtle, Giant Snake-Necked Turtle

Deborah Bower, Kate HODGES

Research output: Contribution to journalComment/debate

Abstract

Australia's largest snake-necked turtle, Chelodina (Macrochelodina) expansa (Family Chelidae), occurs broadly through the inland rivers and billabongs of eastern and southeastern Australia. The species is cryptic in habit, yet occupies waters heavily exploited and regulated by humans. Traditionally considered a riverine species, recent studies demonstrate that it is more frequently represented in permanent lakes and billabongs connected to main river channels. Typical of many freshwater turtles, C. expansa displays delayed maturity and high adult survivorship. It is carnivorous and feeds primarily on fast-moving prey such as crustaceans and fish, but will also consume carrion. The reproductive biology of C. expansa sets it apart from most other turtles; in response to low temperatures, embryos enter a diapause, which enable them to survive over winter in nests, resulting in a year-long incubation period. Chelodina expansa has lower population densities than sympatric turtle species, which may increase its vulnerability to threats. Persistence of C. expansa relies on habitat quality and longitudinal connectivity of freshwater systems in southeastern Australia.
Original languageEnglish
Pages (from-to)1-8
Number of pages8
JournalChelonian Research Monographs
Issue number5
DOIs
Publication statusPublished - 2014

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turtles
snakes
Chelidae
rivers
dead animals
plant architecture
diapause
embryo (animal)
population density
Crustacea
survival rate
nests
Biological Sciences
lakes
Chelodina
winter
habitats
fish
temperature

Cite this

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title = "Chelodina expansa Gray 1857: Broad-Shelled Turtle, Giant Snake-Necked Turtle",
abstract = "Australia's largest snake-necked turtle, Chelodina (Macrochelodina) expansa (Family Chelidae), occurs broadly through the inland rivers and billabongs of eastern and southeastern Australia. The species is cryptic in habit, yet occupies waters heavily exploited and regulated by humans. Traditionally considered a riverine species, recent studies demonstrate that it is more frequently represented in permanent lakes and billabongs connected to main river channels. Typical of many freshwater turtles, C. expansa displays delayed maturity and high adult survivorship. It is carnivorous and feeds primarily on fast-moving prey such as crustaceans and fish, but will also consume carrion. The reproductive biology of C. expansa sets it apart from most other turtles; in response to low temperatures, embryos enter a diapause, which enable them to survive over winter in nests, resulting in a year-long incubation period. Chelodina expansa has lower population densities than sympatric turtle species, which may increase its vulnerability to threats. Persistence of C. expansa relies on habitat quality and longitudinal connectivity of freshwater systems in southeastern Australia.",
author = "Deborah Bower and Kate HODGES",
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language = "English",
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journal = "Chelonian Research Monographs",
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Chelodina expansa Gray 1857 : Broad-Shelled Turtle, Giant Snake-Necked Turtle. / Bower, Deborah; HODGES, Kate.

In: Chelonian Research Monographs, No. 5, 2014, p. 1-8.

Research output: Contribution to journalComment/debate

TY - JOUR

T1 - Chelodina expansa Gray 1857

T2 - Broad-Shelled Turtle, Giant Snake-Necked Turtle

AU - Bower, Deborah

AU - HODGES, Kate

PY - 2014

Y1 - 2014

N2 - Australia's largest snake-necked turtle, Chelodina (Macrochelodina) expansa (Family Chelidae), occurs broadly through the inland rivers and billabongs of eastern and southeastern Australia. The species is cryptic in habit, yet occupies waters heavily exploited and regulated by humans. Traditionally considered a riverine species, recent studies demonstrate that it is more frequently represented in permanent lakes and billabongs connected to main river channels. Typical of many freshwater turtles, C. expansa displays delayed maturity and high adult survivorship. It is carnivorous and feeds primarily on fast-moving prey such as crustaceans and fish, but will also consume carrion. The reproductive biology of C. expansa sets it apart from most other turtles; in response to low temperatures, embryos enter a diapause, which enable them to survive over winter in nests, resulting in a year-long incubation period. Chelodina expansa has lower population densities than sympatric turtle species, which may increase its vulnerability to threats. Persistence of C. expansa relies on habitat quality and longitudinal connectivity of freshwater systems in southeastern Australia.

AB - Australia's largest snake-necked turtle, Chelodina (Macrochelodina) expansa (Family Chelidae), occurs broadly through the inland rivers and billabongs of eastern and southeastern Australia. The species is cryptic in habit, yet occupies waters heavily exploited and regulated by humans. Traditionally considered a riverine species, recent studies demonstrate that it is more frequently represented in permanent lakes and billabongs connected to main river channels. Typical of many freshwater turtles, C. expansa displays delayed maturity and high adult survivorship. It is carnivorous and feeds primarily on fast-moving prey such as crustaceans and fish, but will also consume carrion. The reproductive biology of C. expansa sets it apart from most other turtles; in response to low temperatures, embryos enter a diapause, which enable them to survive over winter in nests, resulting in a year-long incubation period. Chelodina expansa has lower population densities than sympatric turtle species, which may increase its vulnerability to threats. Persistence of C. expansa relies on habitat quality and longitudinal connectivity of freshwater systems in southeastern Australia.

UR - http://www.mendeley.com/research/chelodina-expansa-gray-1857-broadshelled-turtle-giant-snakenecked-turtle

U2 - 10.3854/crm.5.071.expansa.v1.2014

DO - 10.3854/crm.5.071.expansa.v1.2014

M3 - Comment/debate

SP - 1

EP - 8

JO - Chelonian Research Monographs

JF - Chelonian Research Monographs

SN - 1088-7105

IS - 5

ER -