Macquarie University
Browse

File(s) stored somewhere else

Please note: Linked content is NOT stored on Macquarie University and we can't guarantee its availability, quality, security or accept any liability.

Larval and metamorph traits of cane toads

dataset
posted on 2022-06-10, 02:43 authored by Richard Shine, Uditha Wijethunga, Matthew GreenleesMatthew Greenlees, Melanie ElphickMelanie Elphick
As an invasive organism spreads into a novel environment, it may encounter strong selective pressures to adapt to abiotic challenges. We examined the effect of water temperature during larval life on rates of survival and growth of the early life-history stages of cane toads (Rhinella marina) from two geographic regions (tropical vs. temperate) in the species’ invaded range in eastern Australia. If local adaptation at the southern (cool-climate) invasion front has extended the cold-tolerance of early life-stages, we would expect to see higher viability of southern-population toads under cooler conditions. Our comparisons revealed no such divergence: the effects of water temperature on rates of larval survival and growth, time to metamorphosis, size at metamorphosis and locomotor performance of metamorphs were similar in both sets of populations. In two cases where tropical and temperate-zone populations diverged in responses to temperature, the tropical animals performed better at low to medium temperatures than did conspecifics from cooler regions. Adaptation to low temperatures in the south might be constrained by behavioural shifts (e.g., in reproductive seasonality, spawning-site selection) that allow toads to breed in warmer water even in cool climates, by gene flow from warmer-climate populations, or by phylogenetic conservatism in these traits.

Methods

Adult toads were collected at sites in tropical and temperate-zone eastern Australia. The toads were bred in captivity and their progeny raised at a series of controlled temperatures so that we could evaluate effects of larval temperatures on life-history traits.

Funding

Australian Research Council : LP170100198

History

FAIR Self Assessment Rating

  • Unassessed

Data Sensitivity

  • General

Source

Dryad

Usage metrics

    Macquarie University Research Data Repository

    Keywords

    Licence

    Exports

    RefWorks
    BibTeX
    Ref. manager
    Endnote
    DataCite
    NLM
    DC