Temperature Regulation in the Speckled Mousebird, Colius striatus

Bartholomew, George A.; Trost, Charles H.

doi:10.2307/1366623

Cited by 96 publications

(22 citation statements)

References 14 publications

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“…West (1972a) 0.724 Brush (1965) 0.733 Dawson and Hudson (1970) 0.301 Bartholomew and Trost (1970) 0.285 West (1972b) 0.187 Calder (1964) manner similar to that depicted in Figure 7 -1. The range of environmental temperature over which the oxygen uptake remains essentially constant (25°-3 rc in Figure 7 -1), is the thermoneurral zone.…”

Section: Environmental Temperaturesupporting

confidence: 53%

Avian Physiology

1976

Springer Advanced Texts in Life Sciences

140

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Section: Environmental Temperaturesupporting

confidence: 53%

Avian Physiology

1976

Springer Advanced Texts in Life Sciences

140

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“…We also tested for the effects of migratory tendency (migrant or nonmigrant) and habitat aridity (desert or non-desert environment). The parameter l provides a measure of the phylogenetic dependence of BMR (see Freckleton et al 2002) equivalent to approximately 75% of that of second-and third-generation captives in an earlier study (Bartholomew & Trost 1970). The shallower scaling exponent for captive-raised birds reflects the fact that metabolic adjustments to artificial environments vary with M b (figure 2).…”

Section: Discussionmentioning

confidence: 97%

Phenotypic plasticity in the scaling of avian basal metabolic rate

2006

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Many birds exhibit short-term, reversible adjustments in basal metabolic rate (BMR), but the overall contribution of phenotypic plasticity to avian metabolic diversity remains unclear. The available BMR data include estimates from birds living in natural environments and captive-raised birds in more homogenous, artificial environments. All previous analyses of interspecific variation in BMR have pooled these data. We hypothesized that phenotypic plasticity is an important contributor to interspecific variation in avian BMR, and that captive-raised populations exhibit general differences in BMR compared to wild-caught populations. We tested this hypothesis by fitting general linear models to BMR data for 231 bird species, using the generalized least-squares approach to correct for phylogenetic relatedness when necessary. The scaling exponent relating BMR to body mass in captive-raised birds (0.670) was significantly shallower than in wild-caught birds (0.744). The differences in metabolic scaling between captive-raised and wildcaught birds persisted when migratory tendency and habitat aridity were controlled for. Our results reveal that phenotypic plasticity is a major contributor to avian interspecific metabolic variation. The finding that metabolic scaling in birds is partly determined by environmental factors provides further support for models that predict variation in scaling exponents, such as the allometric cascade model.

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“…However, such rates are also found among some representatives of other groups, e.g. colies (Bartholomew & Trost, 1970). Many of these species are inhabitants of arid regions, but it is not clear whether their relatively low SMR's reflect specific adjustments to the environment or simply membership in taxonomic groups characterized by low metabolism.…”

Section: Levels Of Smr In Columbid Birdsmentioning

confidence: 99%

Roles of metabolic level and temperature regulation in the adjustment of Western plumed pigeons (Lophophaps ferruginea) to desert conditions

Dawson

Bennett

1973

Comparative Biochemistry and Physiology Part A: Physiology

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Abstract-1 . Standard ferruginea) averages 0.88 of eva~orative water loss for metabolic rate of western plumed pigeons (Lophophaps ml 0, (g hr)-I during summer. This rate and the rate by these birds at 2S°C are well below levels anticipated birds .of comparable size (81 g).2. Summer and late fall birds did not have significantly different minimal thermal conductances, the means for both approximating 1.8 kcal (m2 hr "C)-I. 3. A relatively low level of metabolism and effortless evaporative cooling restrict the caloric burden for western plumed pigeons in the hot and arid regions of northwestern Australia where these birds live. Other pigeons closely associated with hot and arid environments also have relatively low metabolic rates.

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Temperature Regulation in the Speckled Mousebird, Colius striatus

Cited by 96 publications

References 14 publications

Avian Physiology

Avian Physiology

Phenotypic plasticity in the scaling of avian basal metabolic rate

Roles of metabolic level and temperature regulation in the adjustment of Western plumed pigeons (Lophophaps ferruginea) to desert conditions

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