Clutch identity and predator-induced hatching affect behavior and development in a leaf-breeding treefrog

Gibbons, Megan E.; George, M. Patricia

doi:10.1007/s00442-012-2443-4

Cited by 9 publications

(7 citation statements)

References 65 publications

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“… Relationship between log response ratio of mass and log response ratio of maximum jumping performance across 10 species ( m = 0.65 SE = 0.07) (1) John-Alder & Morin (1990) , (2) Goater, Semlitsch & Bernasconi (1993) , (3) Tejedo, Semlitsch & Hotz (2000b) , (4) Álvarez & Nicieza (2002) , (5) Niehaus, Wilson & Franklin (2006) , (6) Gomez-Mestre et al (2010) , (7) Johansson, Lederer & Lind (2010) , (8) Hector, Bishop & Nakagawa (2012) , (9) Todd et al (2012) , (10) Dahl et al (2012) , (11) Gibbons & George (2013) , (12) Enriquez-Urzelai et al (2013) , (13) Cabrera-Guzmán et al (2013) , (14) Fan, Lin & Wei (2014) , (15) J Charbonnier, 2010, unpublished data, (16) this study (A) and relationship between log response ratio of tibiofibula and log response ratio of maximum jumping performance across 7 species ( m = 1.98 SE = 0.74) (1) Tejedo, Semlitsch & Hotz (2000b) , (2) Enriquez-Urzelai et al (2013) , (3) J Charbonnier, 2010, unpublished data, (4) this study (B). …”

Section: Resultsmentioning

confidence: 99%

Consequences of life history switch point plasticity for juvenile morphology and locomotion in theTúngara frog

Charbonnier

Vonesh

2015

PeerJ

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Many animals with complex life cycles can cope with environmental uncertainty by altering the timing of life history switch points through plasticity. Pond hydroperiod has important consequences for the fitness of aquatic organisms and many taxa alter the timing of life history switch points in response to habitat desiccation. For example, larval amphibians can metamorphose early to escape drying ponds. Such plasticity may induce variation in size and morphology of juveniles which can result in carry-over effects on jumping performance. To investigate the carry-over effects of metamorphic plasticity to pond drying, we studied the Túngara frog, Physalaemus pustulosus, a tropical anuran that breeds in highly ephemeral habitats. We conducted an outdoor field mesocosm experiment in which we manipulated water depth and desiccation and measured time and size at metamorphosis, tibiofibula length and jumping performance. We also conducted a complimentary laboratory experiment in which we manipulated resources, water depth and desiccation. In the field experiment, metamorphs from dry-down treatments emerged earlier, but at a similar size to metamorphs from constant depth treatments. In the laboratory experiment, metamorphs from the low depth and dry-down treatments emerged earlier and smaller. In both experiments, frogs from dry-down treatments had relatively shorter legs, which negatively impacted their absolute jumping performance. In contrast, reductions in resources delayed and reduced size at metamorphosis, but had no negative effect on jumping performance. To place these results in a broader context, we review past studies on carry-over effects of the larval environment on jumping performance. Reductions in mass and limb length generally resulted in lower jumping performance across juvenile anurans tested to date. Understanding the consequences of plasticity on size, morphology and performance can elucidate the linkages between life stages.

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Section: Resultsmentioning

confidence: 99%

Consequences of life history switch point plasticity for juvenile morphology and locomotion in theTúngara frog

Charbonnier

Vonesh

2015

PeerJ

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“…Each temporal block consisted of 7–13 clutches collected on each of two days (to obtain eggs of different ages that would hatch on the same day). To minimize possible genetic variation between clutches [11], all tadpoles hatched at a given time were hatched into a single container, mixed, and haphazardly sampled into groups of 50. The experiment was ended after 28 days and all tadpoles were removed with dipnets to quantify survival and morphology through the larval period.…”

Section: Methodsmentioning

confidence: 99%

“…Organisms as diverse as bryozoans, gastropods, polychaetes, crustaceans, echinoderms, urochordates, insects and amphibians [7] can respond to larval conditions in ways that affect their post-metamorphic phenotype, for example in size, morphology, or larval period duration [3], [8]–[10]. Embryos can also exhibit plastic responses to risk and it is clear that those responses can carryover to effect the larval stage and beyond, although we are only now beginning to understand the nature of those lasting effects [9], [11]–[14].…”

Section: Introductionmentioning

confidence: 99%

“…Recent work by Touchon et al [9] has demonstrated that this hatching plasticity has effects that last until metamorphosis. In addition, larval A. callidryas grow more slowly [33], reduce activity in response to cues from dragonfly naiad predators [11], and pre-metamorphic A. callidryas alter the timing of leaving the pond in response to cues from larval predators [34], [35]. However, it is currently unknown if there are lasting effects of hatching plasticity on the morphological development of prey in environments with different predator communities.…”

Section: Introductionmentioning

confidence: 99%

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Plastic Hatching Timing by Red-Eyed Treefrog Embryos Interacts with Larval Predator Identity and Sublethal Predation to Affect Prey Morphology but Not Performance

Touchon

Wojdak

2014

PLoS ONE

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Many animals respond to predation risk by altering their morphology, behavior, or life-history. We know a great deal about the cues prey respond to and the changes to prey that can be induced by predation risk, but less is known about how plastic responses to predators may be affected by separate plastic responses occurring earlier in life, particularly during the embryonic period. Embryos of a broad array of taxa can respond to egg- or larval-stage risks by altering hatching timing, which may alter the way organisms respond to future predators. Using the red-eyed treefrog (Agalychnis callidryas), a model for understanding the effects of plasticity across life-stages, we assessed how the combined effects of induced variation in the timing of embryo hatching and variation in the larval predator community impacted tadpole morphology, pigmentation and swimming performance. We found that A. callidryas tadpoles developed deeper tail muscles and fins and darker pigmentation in response to fish predators, either when alone or in diverse community with other predators. Tadpoles altered morphology much less so to dragonfly naiads or water bugs. Interestingly, morphological responses to predators were also affected by induced differences in hatching age, with early and late-hatched tadpoles exhibiting different allometric relationships between tail height and body length in different predator environments. Beyond induced morphological changes, fish predators often damaged tadpoles’ tails without killing them (i.e., sublethal predation), but these tadpoles swam equally quickly to those with fully intact tails. This was due to the fact that tadpoles with more damaged tails increased tail beats to achieve equal swimming speed. This study demonstrates that plastic phenotypic responses to predation risk can be influenced by a complex combination of responses to both the embryo and larval environments, but also that prey performance can be highly resilient to sublethal predation.

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“…This overlap in cue properties from benign and threatening sources of stimuli creates a discrimination challenge for embryos and necessitates adequate sampling to avoid false alarms and make informed decisions of whether and when to hatch. However, the cost of false alarms decreases developmentally; older hatchlings are larger, more developed, more behaviorally competent, and suffer lower mortality in the water, particularly with aquatic predators (Gibbons and George, 2013; Touchon et al, 2013; Warkentin, 1995; Warkentin, 1999a; Willink et al, 2014). In contrast, the ultimate cost of missed cues—death by asphyxiation or consumption by a predator—does not change across development (Warkentin and Caldwell, 2009).…”

Section: Introductionmentioning

confidence: 99%

Ontogeny of risk assessment and escape-hatching performance by red-eyed treefrog embryos in two threat contexts

Güell

Jung

Almanzar

et al. 2022

Preprint

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Arboreal embryos of red-eyed treefrogs, Agalychnis callidryas, hatch prematurely in response to hypoxia when flooded and mechanosensory cues (MC) in snake attacks, but hatching later improves tadpole survival. We studied ontogenetic changes in risk assessment and hatching performance of embryos in response to flooding and physical disturbance. We hypothesized that risk assessment decreases as hatchling survival improves and hatching performance increases as embryos develop. Because snakes eat faster than embryos asphyxiate, we hypothesized that embryos decide to hatch sooner and hatch faster in response to MC. We video-recorded individual embryos hatching in response to each cue type, then compared the incidence and timing of a series of events and behaviors from cue onset to complete hatching across ages and stimuli. Latency from cue to hatching decreased developmentally in both contexts and was shorter with MC, but the elements contributing to those changes differed. Hypoxia-assessment involved position changes, which decreased developmentally along with assessment time. MC-assessment was passive, faster, and also decreased with age. The first stages of hatching, membrane rupture and head emergence, were surprisingly age-independent but faster with MC, congruent with greater effort under more immediate risk. In contrast, body emergence and compression showed ontogenetic improvement consistent with morphological constraints but no cue effect. Both appropriate timing and effective performance of hatching are necessary for continued development. Different stages of the process vary with development and environmental context, suggesting combinations of adaptive context- and stage-dependent behavior, cue-related constraints on information acquisition, and ontogenetic constraints on elements of performance.Summary statementDevelopment reduces risk assessment and improves hatching performance by red-eyed treefrog embryos in both flooding and simulated attacks. Predation cues elicit faster decisions and hatching, congruent with more immediate risk.

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Clutch identity and predator-induced hatching affect behavior and development in a leaf-breeding treefrog

Cited by 9 publications

References 65 publications

Consequences of life history switch point plasticity for juvenile morphology and locomotion in theTúngara frog

Consequences of life history switch point plasticity for juvenile morphology and locomotion in theTúngara frog

Plastic Hatching Timing by Red-Eyed Treefrog Embryos Interacts with Larval Predator Identity and Sublethal Predation to Affect Prey Morphology but Not Performance

Ontogeny of risk assessment and escape-hatching performance by red-eyed treefrog embryos in two threat contexts

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