Hatching plasticity in a Southeast Asian tree frog

Poo, Sinlan; Bickford, David P.

doi:10.1007/s00265-014-1781-0

Cited by 13 publications

(28 citation statements)

References 41 publications

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“…We also observed that embryos exposed to crushed eggs induced earlier time to hatching in two experiments, a later time to hatching in two experiments, and no change in 19 experiments. We only found two studies that have examined amphibian embryo responses to damaged eggs; one study observed the induction of earlier hatching ( Chiromantis hansenae ; Poo & Bickford ), whereas the other study observed no effect ( L. temporaria ; Mandrillon & Saglio ). Collectively, these results suggest that amphibian embryos often respond to cues from crayfish eating conspecific eggs and occasionally respond to cues from damaged conspecific eggs.…”

Section: Discussionmentioning

confidence: 99%

Phylogenetic patterns of trait and trait plasticity evolution: Insights from amphibian embryos

et al. 2018

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Environmental variation favors the evolution of phenotypic plasticity. For many species, we understand the costs and benefits of different phenotypes, but we lack a broad understanding of how plastic traits evolve across large clades. Using identical experiments conducted across North America, we examined prey responses to predator cues. We quantified five life-history traits and the magnitude of their plasticity for 23 amphibian species/populations (spanning three families and five genera) when exposed to no cues, crushed-egg cues, and predatory crayfish cues. Embryonic responses varied considerably among species and phylogenetic signal was common among the traits, whereas phylogenetic signal was rare for trait plasticities. Among trait-evolution models, the Ornstein-Uhlenbeck (OU) model provided the best fit or was essentially tied with Brownian motion. Using the best fitting model, evolutionary rates for plasticities were higher than traits for three life-history traits and lower for two. These data suggest that the evolution of life-history traits in amphibian embryos is more constrained by a species' position in the phylogeny than is the evolution of life history plasticities. The fact that an OU model of trait evolution was often a good fit to patterns of trait variation may indicate adaptive optima for traits and their plasticities.

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Section: Discussionmentioning

confidence: 99%

Phylogenetic patterns of trait and trait plasticity evolution: Insights from amphibian embryos

et al. 2018

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“…Only one side of each tank was used to be consistent with experimental design in a concurrent study (Poo & Bickford, 2014). We conducted field observations at a seasonal pond within the dry evergreen forest.…”

Section: Methodsmentioning

confidence: 99%

“…The difference may be due to a relatively small amount of past investment in C. hansenae. Changes in offspring vulnerability in C. hansenae are particularly interesting, as older eggs are capable of hatching prematurely to escape katydid predation, whereas younger ones are not (Poo & Bickford, 2014). Therefore, additional effort invested in older eggs might be too small to have a significant effect on future fecundity, and consequently parental behaviour, of guardian female frogs.…”

Section: Factors Influencing Investment In Parental Carementioning

confidence: 99%

“…observ.). Predation is the primary source of egg mortality under natural settings (Poo & Bickford, 2013), and katydids are the main predator (Poo & Bickford, 2014). Maternal care is essential to the survival of their eggs, without which over 60% of egg clutches will suffer mortality due to desiccation (Poo & Bickford, 2013).…”

Section: Introductionmentioning

confidence: 99%

“…Chiromantis hansenae is an arboreal-breeding frog that lays gelatinous egg masses that overhang ponds. As a response to predation pressures from katydids, eggs can accelerate hatching to escape predation, with eggs at different developmental stages responding differently to predation cues (Poo & Bickford, 2014). Predation is the primary source of egg mortality under natural settings (Poo & Bickford, 2013), and katydids are the main predator (Poo & Bickford, 2014).…”

Section: Introductionmentioning

confidence: 99%

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Dynamic switching in predator attack and maternal defence of prey

Poo¹,

Evans

Tan

et al. 2016

Biol. J. Linn. Soc.

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Predator and prey relationships are dynamic and interrelated. Thus, any offensive behaviour will vary according to differing defensive behaviours, or vice versa, within each species in any predator-prey system. However, most studies are one-sided as they focus on just one behaviour, that of either the predator or prey. Here, we examine both predatory behaviour of an oophagus katydid and antipredator behaviour by a frog with egg-stage parental care. Katydid offensive behaviour and predation success was greater in females and increased with predator maturity and size. Frog defensive behaviour was sex specific, probably because only mothers provide parental care. Defensive behaviour could be active, such as charging predators, or passive, such as sheltering eggs, with greater active defence against larger predators; neither was influenced by offspring age. These results are contrary to existing theory, which argues parental investment ought to be negatively correlated with parental predation risks and affected by offspring age. This study highlights the use of antipredator behaviour to test predictions of parental investment theories in amphibians. In addition, it illustrates the need to consider factors that influence both species concurrently when examining the complex interaction between predators and parents.

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Mechanisms, costs, and carry‐over effects of cannibal‐induced developmental plasticity in invasive cane toads

Crossland,

Shine,

DeVore

2024

Ecology and Evolution

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Inducible defences can improve survival in variable environments by allowing individuals to produce defences if they detect predators. These defences are often expressed as inter‐related developmental, morphological, and behavioural changes. However, producing defences can incur costs, which may be expressed immediately and/or during subsequent life stages. In Australia, waterborne cues of potentially cannibalistic conspecific tadpoles induce hatchlings of invasive cane toads to accelerate their developmental rate, thereby reducing their window of vulnerability. However, the mechanisms and costs of such accelerated development are poorly understood, and whether cane toad embryos show cannibal‐induced plasticity in other traits is unknown. Here, we found no evidence of altered time of hatching for embryos exposed to non‐feeding conspecific cannibal tadpole cues. Additionally, hatchling dispersal behaviours were not affected by exposure to these cues. However, developmental acceleration of hatchlings induced by exposure to tadpole cues was accompanied by reduced hatchling growth, indicating a trade‐off between these processes. At the conclusion of the hatchling stage, cannibal‐exposed individuals were smaller and morphologically distinct from control siblings. This size reduction affected performance during the subsequent tadpole stage: smaller cannibal‐exposed individuals were more likely to die, and initial size tended to be positively associated with subsequent tadpole growth and development across treatments (respectively, p = .07 and p = .06). However, even accounting for variation in initial size, there was an additional negative effect of cannibal exposure on tadpole growth and development, demonstrating that the fitness costs associated with developmental acceleration are not entirely attributable to size reductions.

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Hatching plasticity in a Southeast Asian tree frog

Cited by 13 publications

References 41 publications

Phylogenetic patterns of trait and trait plasticity evolution: Insights from amphibian embryos

Phylogenetic patterns of trait and trait plasticity evolution: Insights from amphibian embryos

Dynamic switching in predator attack and maternal defence of prey

Mechanisms, costs, and carry‐over effects of cannibal‐induced developmental plasticity in invasive cane toads

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