Performance and Movement in Relation to Postmetamorphic Body Size in a Pond-Breeding Amphibian

Yagi, Katharine T.; Green, David M.

doi:10.1670/17-058

Cited by 14 publications

(15 citation statements)

References 71 publications

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“…Size is a critical trait in amphibian biology from physical abilities to individual fitness (Walton, 1988;Van Allen et al, 2010;Earl and Whiteman, 2015), with snout-vent length being a simple measurement that encompassed much of the variation in size. In many amphibian species, larger individual size is often correlated with increased performance (Chelgren et al, 2006;Gomes et al, 2009;Yagi and Green, 2017), as observed in our results (Figure 3). Yet increases in snoutvent length were also correlated with increased movement probability (Figure 2).…”

Section: Discussionsupporting

confidence: 86%

Starting on the Right Foot: Carryover Effects of Larval Hydroperiod and Terrain Moisture on Post-metamorphic Frog Movement Behavior

et al. 2019

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Changing patterns of precipitation and drought will dramatically influence the distribution and persistence of lentic habitats. Pond-breeding amphibians can often respond to changes in habitat by plastically shifting behavioral and developmental trait response. However, fitness tradeoffs inherent in life history strategies can carry over to impact development, behavior, and fitness in later life stages. In this experiment, we investigated carryover effects of hydroperiod permanence on the movement behavior of newly-metamorphosed juvenile Northern Red-legged Frogs (Rana aurora). Frogs were raised through metamorphosis in mesocosms under either permanent or ephemeral hydroperiod conditions. After metamorphosis, individuals were removed from the mesocosms, measured, uniquely tagged with elastomer, and moved to holding terrariums. Movement behavior was quantified under two terrain conditions: a physiologically-taxing, dry runway treatment, or a control, moist runway treatment. Individuals were given 30 min to move down the 1 × 20m enclosed structure before distance was measured. We applied a hurdle model to examine two distinct components of movement behavior: (1) the probability of moving away from the start location, and (2) movement distance. We found that hydroperiod condition had an indirect carryover effect on movement via the relationship between individual size and the propensity to move. Individuals from ephemeral mesocosm conditions metamorphosed at a smaller size but showed increased growth rates as compared to individuals from permanent hydroperiod conditions. Individual snout-vent length and runway condition (moist or dry) were significant predictors of both aspects of movement behavior. Larger individuals were more likely to move down the runway and able to move a farther distance than smaller individuals. In addition to the influence of size, dry runway conditions reduced the probability of individuals moving from the start location, but increased the distance traveled relative to the moist runway. The demonstrated cumulative impact of stressors suggests the importance of addressing direct, indirect, and carryover effects of stressors throughout ontogeny.

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Section: Discussionsupporting

confidence: 86%

Starting on the Right Foot: Carryover Effects of Larval Hydroperiod and Terrain Moisture on Post-metamorphic Frog Movement Behavior

et al. 2019

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“…Body size at metamorphosis is often positively correlated with dispersal-enhancing behavioral traits (Cote et al 2010;Ronce and Clobert 2012) such as boldness, activity level, and exploration propensity of juveniles (Kelleher et al 2018). In addition, body size at metamorphosis is positively associated with locomotor traits of juveniles such as jumping distance (Tejedo et al 2000;Ficetola and De Bernardi 2006;Boes and Benard 2013;Cabrera-Guzmán et al 2013), speed (Beck and Congdon 2000;Choi et al 2003), and endurance (Beck and Congdon 2000;Yagi and Green 2017). Independent of body size, parasite load can reduce endurance (Goater et al 1993).…”

Section: Figure 2 Conceptual Framework To Show How Extrinsic Factorsmentioning

confidence: 99%

Determinants and Consequences of Dispersal in Vertebrates with Complex Life Cycles: A Review of Pond-Breeding Amphibians

Cayuela¹,

Valenzuela‐Sánchez²,

Teulier³

et al. 2020

The Quarterly Review of Biology

105

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Dispersal is a central process in ecology and evolution. It strongly influences the dynamics of spatially structured populations and affects evolutionary processes by shaping patterns of gene flow. For these reasons, dispersal has received considerable attention from ecologists, evolutionary biologists, and conservationists. Although it has been studied extensively in taxa such as birds and mammals, much less is known about 2 dispersal in vertebrates with complex life cycles such as pond-breeding amphibians. Over the past two decades, researchers have taken an ever-increasing interest in amphibian dispersal and initiated both basic and applied studies, using a broad range of experimental and observational approaches. This body of research reveals complex dispersal patterns, causations, and syndromes, with dramatic consequences for the demography and genetics of amphibian populations. In this review, our goals are to: redefine and clarify the concept of amphibian dispersal; review current knowledge about the effects of individual (i.e., condition-dependent dispersal) and environmental (i.e., context-dependent dispersal) factors during the three stages of dispersal (i.e., emigration, transience, and immigration); identify the demographic and genetic consequences of dispersal in spatially structured amphibian populations; and propose new research avenues to extend our understanding of amphibian dispersal.

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“…Environmental conditions experienced during the larval stage often affect development in ways that transcend the metamorphic boundary causing carry-over or latent effects on post-metamorphic phenotypes (Pechenik 2006;Räsänen et al 2002;Gomez-Mestre et al 2010;Yagi and Gren 2016). Larval traits that may influence juvenile fitness include morphological and physiological traits, such as larval size, develpopmental rate, and age (Ficetola and De Bernardi 2006;Crean et al 2011;Yagi and Green 2017). Juvenile performance and, thus, survival are often associated size-dependent due to better predator avoidance, thermoregulation, and water content in individuals of larger size (John-Alder and Morin 1990; Goater et al 1993;Beck and Congdon 2000;Alvarez and Nicieza 2002;Ruthsatz et al 2019).…”

Section: Introductionmentioning

confidence: 99%

Post-metamorphic carry-over effects of altered thyroid hormone level and developmental temperature: physiological plasticity and body condition at two life stages in Rana temporaria

et al. 2020

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Environmental stress induced by natural and anthropogenic processes including climate change may threaten the productivity of species and persistence of populations. Ectotherms can potentially cope with stressful conditions such as extremes in temperature by exhibiting physiological plasticity. Amphibian larvae experiencing stressful environments display altered thyroid hormone (TH) status with potential implications for physiological traits and acclimation capacity. We investigated how developmental temperature (T dev) and altered TH levels (simulating proximate effects of environmental stress) influence the standard metabolic rate (SMR), body condition (BC), and thermal tolerance in metamorphic and post-metamorphic anuran larvae of the common frog (Rana temporaria) reared at five constant temperatures (14-28 °C). At metamorphosis, larvae that developed at higher temperatures had higher maximum thermal limits but narrower ranges in thermal tolerance. Mean CT max was 37.63 °C ± 0.14 (low TH), 36.49 °C ± 0.31 (control), and 36.43 °C ± 0.68 (high TH) in larvae acclimated to different temperatures. Larvae were able to acclimate to higher T dev by adjusting their thermal tolerance, but not their SMR, and this effect was not impaired by altered TH levels. BC was reduced by 80% (metamorphic) and by 85% (postmetamorphic) at highest T dev. The effect of stressful larval conditions (i.e., different developmental temperatures and, to some extent, altered TH levels) on SMR and particularly on BC at the onset of metamorphosis was carried over to froglets at the end of metamorphic climax. This has far reaching consequences, since body condition at metamorphosis is known to determine metamorphic success and, thus, is indirectly linked to individual fitness in later life stages.

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Performance and Movement in Relation to Postmetamorphic Body Size in a Pond-Breeding Amphibian

Cited by 14 publications

References 71 publications

Starting on the Right Foot: Carryover Effects of Larval Hydroperiod and Terrain Moisture on Post-metamorphic Frog Movement Behavior

Starting on the Right Foot: Carryover Effects of Larval Hydroperiod and Terrain Moisture on Post-metamorphic Frog Movement Behavior

Determinants and Consequences of Dispersal in Vertebrates with Complex Life Cycles: A Review of Pond-Breeding Amphibians

Post-metamorphic carry-over effects of altered thyroid hormone level and developmental temperature: physiological plasticity and body condition at two life stages in Rana temporaria

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