Rapid assimilation of yolk enhances growth and development of lizard embryos from a cold environment

Storm, Melissa A.; Angilletta, Michael J.

doi:10.1242/jeb.005652

Cited by 35 publications

(31 citation statements)

References 46 publications

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“…The growth analysis was then completed by determining the mean standardised growth residuals for each river (Jones 2000;Benstead et al 2007;Storm & Angilletta 2007). In all cases, there was more variation in lengths at age within a sample than between sampling years, with no significant differences in lengths at age between years (ANOVA P > 0.05).…”

Section: Methodsmentioning

confidence: 99%

Spatial variation in the somatic growth rates of European barbel Barbus barbus: a UK perspective

Britton

Davies

Pegg

2012

Ecology of Freshwater Fish

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The European barbel Barbus barbus is threatened in areas of its range because of its sensitivity to anthropogenic disturbance in riverine habitats and, in the UK, is indigenous to a relatively small number of eastflowing rivers, with nonindigenous populations present in other rivers following introductions for angling enhancement. Fish stock assessment surveys completed between 2002 and 2010 collated age and growth data from 20 rivers across their indigenous and nonindigenous UK range. Analyses revealed that individuals present in samples are of 21 years old, with growth rates highly variable between rivers. There was no relationship between growth rates and the maximum age of fish per river, and there was no difference in growth rates between their indigenous and nonindigenous ranges. A range of abiotic data were collated and analysed against the growth data; these analyses suggested higher mean growth rates were evident in rivers of higher biological water quality (expressed as British Monitoring Working Party Score) and higher mean air temperatures (used as a surrogate of water temperature). That growth of B. barbus was significantly and positively enhanced by increased biological water quality was in contrast to cyprinid fishes such as roach Rutilus rutilus and suggests that as river water quality continues to improve through reduced nutrient inputs, further ecological changes are likely in riverine fish communities.

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Section: Methodsmentioning

confidence: 99%

Spatial variation in the somatic growth rates of European barbel Barbus barbus: a UK perspective

Britton

Davies

Pegg

2012

Ecology of Freshwater Fish

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“…First, we could weigh eggs immediately after laying to avoid changes in mass caused by water flux. Second, we could coordinate dates of oviposition among females to synchronize measures of energetics during development (reported by Storm & Angilletta 2007). Oviposition was induced with an intracoelomic injection of approximately 0·5 mL of oxytocin (20 USP; The Butler Company, Columbus, OH).…”

Section: Methodsmentioning

confidence: 99%

Countergradient variation in embryonic growth and development: do embryonic and juvenile performances trade off?

Niewiarowski

Angilletta

2008

Functional Ecology

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Summary1. Countergradient variation in growth rate requires that rapid growth rate trades off with other performances, such that submaximal growth evolves in certain environments. Negative effects of rapid growth on other traits within a single ontogenetic stage are conspicuous candidates for such trade-offs, but trade-offs spanning ontogenetic stages have received much less attention. 2. We tested whether rapid growth and development of embryonic lizards was associated with poor juvenile performance, as estimated by growth rate and sprint speed after hatching. To do so, we raised lizards from three populations that differ in their environmental temperature and measured their performances during embryonic and hatchling stages. 3. Under the same environmental conditions, embryos from two cold environments grew and developed more rapidly than did the embryos from a warm environment. Among populations, rapid growth and development was associated with slow growth after hatching. But surprisingly, the opposite pattern was observed within populations. 4. Our results highlight the need to consider trade-offs mediated by ecological factors (e.g. competition and predation), which calls for similar experiments in natural environments.

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“…These thermal fluetuations have important implieations for the phenotype. First, embryos grow and develop rapidly during aeute exposures to temperatures that would prove lethal during prolonged exposures (Christian et al 1986;Oufiero and Angilletta 2006;Storm and Angilletta 2007). Seeond, rates of physiologieal performanee usually ehange nonlinearly in response to ehanges in body temperature, approaehing a maximum at some intermediate temperature (Huey and Stevenson 1979;Angilletta et al 2002).…”

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confidence: 99%

Energetics of Lizard Embryos at Fluctuating Temperatures

Oufiero

Angilletta

2010

Physiological and Biochemical Zoology

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Most animals experience fluctuations in temperature during development, but studies of energetics have ignored the potential influence of these thermal fluctuations. We measured the energetics of Sceloporus undulatus lizard embryos under two conditions that differ realistically in the mean and variance of temperature (diel cycles of 20 degrees -30 degrees and 20 degrees -34 degrees C). Our goal was to determine whether embryos in warm nests would expend more energy to develop than embryos in cool nests. We quantified metabolic rates during development, durations of incubation, and sizes at hatching. To describe changes in metabolic rate during incubation, we used the Akaike Information Criterion to determine the best statistical model among a set of six candidates. Once the best model was determined, the energetic cost of development was estimated by integrating metabolic rates over the period of incubation. We found that some form of sigmoidal model provided the best fit to the data for the majority of embryos (75%). Although embryos in the warmer treatment hatched earlier, the cost of development ( approximately 1.6 kJ) did not differ significantly between embryos in the two treatments. This estimate of energy expenditure at fluctuating temperatures accords with previous estimates of energy expenditure at constant temperatures, suggesting that embryonic metabolism under realistic thermal conditions does not differ substantially from that under constant conditions.

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Rapid assimilation of yolk enhances growth and development of lizard embryos from a cold environment

Cited by 35 publications

References 46 publications

Spatial variation in the somatic growth rates of European barbel Barbus barbus: a UK perspective

Spatial variation in the somatic growth rates of European barbel Barbus barbus: a UK perspective

Countergradient variation in embryonic growth and development: do embryonic and juvenile performances trade off?

Energetics of Lizard Embryos at Fluctuating Temperatures

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