Intraspecific mass-scaling of field metabolic rates of a freshwater crayfish varies with stream land cover

McFeeters, Bryan J.; Xenopoulos, Marguerite A.; Spooner, Daniel E.; Wagner, Nicole D.; Frost, Paul C.

doi:10.1890/es10-00112.1

Cited by 22 publications

(21 citation statements)

References 45 publications

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“…As further evidence, when the effects of activity are removed in an actively mobile species, such as the fish Coregonus albula, T a and the resting metabolic scaling exponent are strongly negatively correlated [115], as predicted by the MLBH [16,26]. Further studies of the effects of various abiotic and biotic ecological factors on metabolic scaling would also be worthwhile (see also [10,16,22,26,32,41,[44][45][46]48]). …”

Section: Suggestions For Future Researchmentioning

confidence: 88%

Effects of Contingency versus Constraints on the Body-Mass Scaling of Metabolic Rate

Glazier

2018

Challenges

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I illustrate the effects of both contingency and constraints on the body-mass scaling of metabolic rate by analyzing the significantly different influences of ambient temperature (T a ) on metabolic scaling in ectothermic versus endothermic animals. Interspecific comparisons show that increasing T a results in decreasing metabolic scaling slopes in ectotherms, but increasing slopes in endotherms, a pattern uniquely predicted by the metabolic-level boundaries hypothesis, as amended to include effects of the scaling of thermal conductance in endotherms outside their thermoneutral zone. No other published theoretical model explicitly predicts this striking variation in metabolic scaling, which I explain in terms of contingent effects of T a and thermoregulatory strategy in the context of physical and geometric constraints related to the scaling of surface area, volume, and heat flow across surfaces. My analysis shows that theoretical models focused on an ideal 3/4-power law, as explained by a single universally applicable mechanism, are clearly inadequate for explaining the diversity and environmental sensitivity of metabolic scaling. An important challenge is to develop a theory of metabolic scaling that recognizes the contingent effects of multiple mechanisms that are modulated by several extrinsic and intrinsic factors within specified constraints.

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Section: Suggestions For Future Researchmentioning

confidence: 88%

Effects of Contingency versus Constraints on the Body-Mass Scaling of Metabolic Rate

Glazier

2018

Challenges

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“…A value of 0.71 for the mass exponent determined for crayfish species Orconectes rusticus using field metabolic rate in 137 individuals of different populations (McFeeters et al, 2011) was used within this study.…”

Section: Discussionmentioning

confidence: 99%

Muddied waters: suspended sediment impacts on gill structure and aerobic scope in an endangered native and an invasive freshwater crayfish

et al. 2013

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Suspended sediment (SS) loadings in freshwater habitats have increased over the past century and SS is now a significant environmental stressor. Greater tolerance to environmental stressors has been proposed as a factor in the success of aquatic invasive species. Further, parasites may interact with environmental stressors to increase host susceptibility to loss of fitness and mortality. We compared the effects of SS exposure on the gill structure and aerobic scope of the endangered white-clawed crayfish (Austropotamobius pallipes), and the invasive signal crayfish (Pacifastacus leniusculus), and assessed impacts in relation to parasite burden. SS caused gill fouling and reduction in aerobic scope in both species, though A. pallipes was more susceptible than invasive P. leniusculus. The parasite Branchiobdella astaci, a crayfish worm that infests the gills, interacted with the sediment to affect gill structure whereas infection with the microsporidian parasite Thelohania contejeani had no effect on crayfish response to SS. Juvenile P. lenisuculus had a higher standard metabolic rate than A. pallipes, which may be linked to competitive advantages such as higher growth rate and behavioural dominance. Conservation of A. pallipes often involves relocation of threatened populations to isolated stillwaters; our findings suggest that SS levels should be assessed before relocation.

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“…In the absence of a complete set of species-and rate-specific values for b, all adjustments were made using b=0.71 based on the field MR of Orconectes rusticus crayfish (McFeeters et al 2011). Mass-adjusted MRs (Eq.…”

Section: Methodsmentioning

confidence: 99%

Predatory impacts of alien decapod Crustacea are predicted by functional responses and explained by differences in metabolic rate

Taylor

Dunn

2018

Biol Invasions

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Alien predators can have large impacts on prey. It is important that we understand, and ideally predict, these impacts. Here, we compare predatory impacts of size-matched decapod crustaceans-invasive alien Eriocheir sinensis and Pacifastacus leniusculus, and native European Austropotamobius pallipes-and use this case study to inform methods for impact prediction. We quantify functional responses (FRs) on three macroinvertebrate prey species, examine switching behaviour, and measure metabolic rates as a possible mechanistic explanation for differences in predation. FRs show a consistent pattern: attack coefficients and maximum feeding rates are ordered E. sinensis≥P. leniusculus≥A. pallipes for all prey species. Attack coefficients of E. sinensis are up to 6.7 times greater than those of size-matched crayfish and maximum feeding rates up to 3.0 times greater. FR parameters also differ between the invasive and native crayfish, but only up to 2.6 times. We find no evidence of switching behaviour in crayfish but suggestions of negative switching in E. sinensis. Differences in FR parameters are mirrored by differences in routine, but not standard, metabolic rate. Overall, our data predict strong predatory impacts of E. sinensis, even relative to alien P. leniusculus. Strong impacts of P. leniusculus relative to A. pallipes may be driven more by body size or abundance than per capita effect. FRs vary between prey types in line with existing knowledge of impacts, supporting the use of FRs in quantitative, prey-specific impact predictions. MRs could offer a general mechanistic explanation for differences in predatory behaviour and impacts.

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Intraspecific mass-scaling of field metabolic rates of a freshwater crayfish varies with stream land cover

Cited by 22 publications

References 45 publications

Effects of Contingency versus Constraints on the Body-Mass Scaling of Metabolic Rate

Effects of Contingency versus Constraints on the Body-Mass Scaling of Metabolic Rate

Muddied waters: suspended sediment impacts on gill structure and aerobic scope in an endangered native and an invasive freshwater crayfish

Predatory impacts of alien decapod Crustacea are predicted by functional responses and explained by differences in metabolic rate

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