Predation by the saltwater crocodile (Crocodylus porosus) on sea turtle adults, eggs, and hatchlings

Scott Whiting, Andrea Whiting

    Research output: Contribution to journalArticleResearchpeer-review

    Abstract

    This paper describes predation tactics used by the saltwater crocodile (Crocodylus porosus) on flatback (Natator depressus) and olive ridley (Lepidochelys olivacea) sea turtles on nesting beaches in northern Australia. For adult turtles, crocodiles used both a sit-and-wait tactic in which they attacked a turtle at the water's edge after it completed nesting and an active hunting strategy in which crocodiles followed turtle tracks into the dunes to attack turtles at nest sites. Saltwater crocodiles also hunted sea turtle hatchlings in the dunes and excavated a sea turtle nest and consumed the eggs. The protection of saltwater crocodiles in Australia starting in the early 1970s has led to increased population sizes and a greater proportion of larger individuals. This likely has resulted in increased predation rates on sea turtles over several decades, which should be considered as an important mortality component for some tropical nesting aggregations. � 2011 Chelonian Research Foundation.
    Original languageEnglish
    Pages (from-to)198-205
    Number of pages8
    JournalChelonian Conservation and Biology
    Volume10
    Issue number2
    DOIs
    Publication statusPublished - 1 Dec 2011

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    Crocodylus porosus
    sea turtles
    turtle
    turtles
    predation
    egg
    crocodiles
    dunes
    nesting sites
    beaches
    dune
    population size
    nests
    crocodile
    sea
    nest site
    hunting
    nest
    beach
    mortality

    Cite this

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    title = "Predation by the saltwater crocodile (Crocodylus porosus) on sea turtle adults, eggs, and hatchlings",
    abstract = "This paper describes predation tactics used by the saltwater crocodile (Crocodylus porosus) on flatback (Natator depressus) and olive ridley (Lepidochelys olivacea) sea turtles on nesting beaches in northern Australia. For adult turtles, crocodiles used both a sit-and-wait tactic in which they attacked a turtle at the water's edge after it completed nesting and an active hunting strategy in which crocodiles followed turtle tracks into the dunes to attack turtles at nest sites. Saltwater crocodiles also hunted sea turtle hatchlings in the dunes and excavated a sea turtle nest and consumed the eggs. The protection of saltwater crocodiles in Australia starting in the early 1970s has led to increased population sizes and a greater proportion of larger individuals. This likely has resulted in increased predation rates on sea turtles over several decades, which should be considered as an important mortality component for some tropical nesting aggregations. � 2011 Chelonian Research Foundation.",
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    language = "English",
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    Predation by the saltwater crocodile (Crocodylus porosus) on sea turtle adults, eggs, and hatchlings. / Whiting, Scott; Whiting, Andrea.

    In: Chelonian Conservation and Biology, Vol. 10, No. 2, 01.12.2011, p. 198-205.

    Research output: Contribution to journalArticleResearchpeer-review

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