Movement patterns and activity of the Brazilian snake-necked turtle Hydromedusa maximiliani (Testudines: Chelidae) in southeastern Brazil

Franco Souza, Arthur GEORGES, Jaime Bertoluci

    Research output: Contribution to journalArticle

    2 Citations (Scopus)

    Abstract

    To investigate the movement patterns and activity of Hydromedusa maximiliani in southeastern Brazil, sixteen adult freshwater turtles (eight males and eight females) were monitored with radio-transmitters from October 2009 to November 2010. An additional 22 turtles (11 males and 11 females) were monitored with thread-bobbins over a 3-day period. Hydromedusa maximiliani showed strong tendency to remain close to the river course. The distance moved each day varied from 0 to 179 m/day (radio-tracking) and 1.5 to 201 m/day (thread-bobbins). Males moved greater distances than females during the mating season (August to November), while females exhibited pronounced movements associated with egg-laying (December to February).Male and female movements did not differ significantly. Straight line distancemeasurements, usually obtained by radio-tracking, underestimate actual movement distances, since the nonlinearity of movements is not captured by radio-tracking as opposed to spool tracking, even when long distances are travelled. Results from this study are important for establishing conservation strategies for this vulnerable species.
    Original languageEnglish
    Pages (from-to)215-228
    Number of pages14
    JournalAmphibia Reptilia
    Volume37
    Issue number2
    DOIs
    Publication statusPublished - 2016

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    Chelidae
    Testudines
    turtles
    snakes
    Brazil
    radio
    radio transmitters
    breeding season
    oviposition
    Hydromedusa (Chelidae)
    rivers

    Cite this

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    title = "Movement patterns and activity of the Brazilian snake-necked turtle Hydromedusa maximiliani (Testudines: Chelidae) in southeastern Brazil",
    abstract = "To investigate the movement patterns and activity of Hydromedusa maximiliani in southeastern Brazil, sixteen adult freshwater turtles (eight males and eight females) were monitored with radio-transmitters from October 2009 to November 2010. An additional 22 turtles (11 males and 11 females) were monitored with thread-bobbins over a 3-day period. Hydromedusa maximiliani showed strong tendency to remain close to the river course. The distance moved each day varied from 0 to 179 m/day (radio-tracking) and 1.5 to 201 m/day (thread-bobbins). Males moved greater distances than females during the mating season (August to November), while females exhibited pronounced movements associated with egg-laying (December to February).Male and female movements did not differ significantly. Straight line distancemeasurements, usually obtained by radio-tracking, underestimate actual movement distances, since the nonlinearity of movements is not captured by radio-tracking as opposed to spool tracking, even when long distances are travelled. Results from this study are important for establishing conservation strategies for this vulnerable species.",
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    Movement patterns and activity of the Brazilian snake-necked turtle Hydromedusa maximiliani (Testudines: Chelidae) in southeastern Brazil. / Souza, Franco; GEORGES, Arthur; Bertoluci, Jaime.

    In: Amphibia Reptilia, Vol. 37, No. 2, 2016, p. 215-228.

    Research output: Contribution to journalArticle

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