Effects of temperature-induced variation in anuran larval growth rate on head width and leg length at metamorphosis

Blouin, Michael S.; Brown, Sebastian T.

doi:10.1007/s004420000458

Cited by 54 publications

(69 citation statements)

References 45 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Interestingly, increasing temperature did not induce a response in hind leg length with an effect size not different from zero. Although developmental time was clearly reduced and growth rate was enhanced, an expected hind leg elongation similar to that found with increasing resources was only found for ranid frogs (Rana cascadae, Blouin & Brown 2000;and R. lessonae, Orizaola & Laurila 2009), whereas a shortening in hind legs was found for the rest of species. This contrasting pattern may reflect a phylogenetic signal, although the small sample size (6 species) precludes any power in the statistical analysis of phylogenetic autocorrelation (Abouheif 1999).…”

Section: Discussionmentioning

confidence: 64%

“…We estimated adjusted mean differences in morphology between environments by using analysis of covariance (GLM module,STATISTICA 8.0,Statsoft) (Blouin & Loeb 1991) and Rana cascadae (Blouin & Brown 2000), snout -vent length (SVL) (mm) was employed as covariate, and the first principal component (PC1) was used as a covariate in Discoglossus galganoi (Nicieza et al 2006). The environment -body size interaction term was included in the model to test for heterogeneity of slopes.…”

Section: Datamentioning

confidence: 99%

“…However, previous research on amphibians and other ectothermic vertebrates has suggested that size-independent metric shapes are generally insensitive to environmental induction (Arnold & Peterson 1989, Blouin & Loeb 1991, Forsman 1996, Blouin & Brown 2000.…”

Section: Introductionmentioning

confidence: 97%

See 2 more Smart Citations

Contrasting effects of environmental factors during larval stage on morphological plasticity in post-metamorphic frogs

Tejedo¹,

Marangoni²,

Pertoldi³

et al. 2010

Clim. Res.

109

View full text Add to dashboard Cite

In organisms with complex life cycles, environmentally induced plasticity across sequential stages can have important consequences on morphology and life history traits such as developmental and growth rates. However, previous research in amphibians and other ectothermic vertebrates suggests that some morphological traits are generally insensitive to environmental inductions. We conducted a literature survey to examine the allometric responses in relative hind leg length and head shape of post-metamorphic anuran amphibians to induced environmental (temperature, resource level, predation and desiccation risk) variation operating during the larval phase in 44 studies using 19 species. To estimate and compare plastic responses across studies, we employed both an index of plasticity and effect sizes from a meta-analysis. We found contrasting trait responses to different environmental cues. Higher temperatures increased development more than growth rate and induced smaller heads but not overall shifts in hind leg length. In contrast, an increment in resource availability increased growth more than development, with a parallel increase in hind leg length but no change in head shape. Increases in predation risk decreased both development and growth rates and slightly reduced relative hind leg length, but there was no change in head shape. Pond desiccation induced quick development and low growth rates, with no changes in morphology. Across environments, both hind leg and head shape plasticity were positively correlated with growth rate plasticity. However, plasticity of developmental rate was only correlated with head shape plasticity. Overall, these results suggest that environmental trends predicted by global warming projections, such as increasing pond temperature and accelerating pond desiccation, will significantly influence hind leg and head morphology in metamorphic frogs, which may affect performance and, ultimately, fitness.

show abstract

Section: Discussionmentioning

confidence: 64%

Section: Datamentioning

confidence: 99%

See 1 more Smart Citation

Contrasting effects of environmental factors during larval stage on morphological plasticity in post-metamorphic frogs

Tejedo¹,

Marangoni²,

Pertoldi³

et al. 2010

Clim. Res.

109

View full text Add to dashboard Cite

show abstract

“…Moreover, in frogs from density experiments the early metamorphosing individuals have higher ratios of hind-limb to SVL than do the later metamorphosing individuals, so that time to metamorphosis and relative hind-limb size show a negative phenotypic correlation (Emerson 1986; but see Blouin and Loeb 1991). Blouin and Brown (2000) demonstrated that the cold-induced extension of the larval period in Rana cascadae results in shorter relative tibio-fibula lengths at metamorphosis. Therefore, the lower jumping performance of coldreared individuals can result from an alteration in metamorph morphology.…”

Section: Discussionmentioning

confidence: 95%

“…The environmental conditions experienced by larvae can have consequences on postmetamorphic success not only through indirect effects derived from changes in metamorphic traits (Smith 1987), but through their direct effects on traits influencing survival and growth in juvenile stages (Scott 1994). In ectotherms, temperature experienced during embryonic development has been shown to affect juvenile shape (Swain and Lindsey 1986;Shine and Harlow 1993;Blouin and Brown 2000), trunk segmentation (Tåning 1952;Lindsey and Harrington 1972) and muscle structure (Stickland et al 1988;. Moreover, phenotypic variation in these traits has a significant impact on locomotor performance (Swain 1992a;Shine and Harlow 1993;Tejedo et al 2000a) and is subjected to strong selection associated with predation (Swain and Lindsey 1984;Swain 1992aSwain , 1992b.…”

Section: Introductionmentioning

confidence: 98%

Effects of induced variation in anuran larval development on postmetamorphic energy reserves and locomotion

2002

View full text Add to dashboard Cite

Anuran larvae exhibit high levels of phenotypic plasticity in growth and developmental rates in response to variation in temperature and food availability. We tested the hypothesis that alteration of developmental pathways during the aquatic larval stage should affect the postmetamorphic performance of the Iberian painted frog (Discoglossus galganoi). We exposed tadpoles to different temperatures and food types (animal- vs. plant-based diets) to induce variation in the length of the larval period and body size at metamorphosis. In this species, larval period varied with temperature but was unaffected by diet composition. In contrast, size at metamorphosis was shaped by the interaction between food quality and temperature; tadpoles fed on an animal-based diet became bulkier metamorphs than those fed on plant-based food at high (22°C) but not at low (12°C) temperature. Body condition of newly metamorphosed frogs was unrelated to the temperature or food type experienced during the premetamorphic stage. Frogs maintained at high temperature during the larval period showed reduced jumping ability, especially when fed on the plant-based diet. However, when considering size-independent jumping ability, cold-reared individuals exhibited the lowest performance, and herbivores reared at 17°C the highest. Cold-reared (12°C) frogs accumulated larger amounts of energy reserves than individuals raised at 17°C or 22°C. This was still the case after correction for differences in body mass, thus indicating some size-independent effect of developmental temperature. Despite the higher lipid content of the carnivorous diet, the differences in energy reserves between herbivores and carnivores were relatively weak and associated with differences in body size. These results suggest that the consequences of environmental variation in the larval habitat can extend to the terrestrial phase and influence juvenile growth and survival.

show abstract

Growth and cranial development in the Andean frogs of the genus Telmatobius (Anura: Telmatobiidae): Exploring the relation of heterochrony and skeletal diversity

Barrionuevo

2018

Journal of Morphology

View full text Add to dashboard Cite

Andean frogs of the genus Telmatobius occur at high elevations, they have an aquatic mode of life and large tadpoles. There are more than 60 species that closely resemble one another and have low values of genetic divergence. However, the skeleton, particularly the cranium, is interspecifically variable with respect to the different levels of development of some elements. Heterochrony is considered to have played a prominent role in generating phenotypic variation, especially among closely related species. Herein, the developmental origins of the adult cranial configuration of two species of Telmatobius are explored. The interactions among larval and postmetamorphic growth, sexual maturation, and ossification sequence in T. oxycephalus and T. rubigo are studied. Although there are no substantial changes in the sequences of ossification of the cranium, it is likely that differential timing of larval periods is related to adult cranial characters. The prolonged larval development of T. rubigo may result in peramorphic configurations of bones that ossify during pre-metamorphosis. This long developmental time would also explain why the gonads of T. rubigo are highly differentiated by the end of metamorphosis. In this species, sexual maturation may be attained precociously in relation to metamorphosis, thereby reducing postmetamorphic developmental time of late-onset bones, which have paedomorphic configurations (e.g., vomer, neopalatine, and columella). An inverse pattern characterizes T. oxycephalus, suggesting that the duration of larval life is related to skeletal configuration in Telmatobius.

show abstract

Effects of temperature-induced variation in anuran larval growth rate on head width and leg length at metamorphosis

Cited by 54 publications

References 45 publications

Contrasting effects of environmental factors during larval stage on morphological plasticity in post-metamorphic frogs

Contrasting effects of environmental factors during larval stage on morphological plasticity in post-metamorphic frogs

Effects of induced variation in anuran larval development on postmetamorphic energy reserves and locomotion

Growth and cranial development in the Andean frogs of the genus Telmatobius (Anura: Telmatobiidae): Exploring the relation of heterochrony and skeletal diversity

Contact Info

Product

Resources

About