Validation of Water Flux and Body Composition in Glaucous Gulls (<i>Larus hyperboreus</i>)

Shaffer, Scott A.; Gabrielsen, Geir Wing; Verreault, Jonathan; Costa, Daniel P.

doi:10.1086/504611

Cited by 8 publications

(10 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Total body water at initial capture was determined from the 18 O dilution space (Speakman 1997). Final body water content was calculated based on body mass and assuming a constant fraction of body water throughout the experiment (Shaffer et al. 2006).…”

Section: Methodsmentioning

confidence: 99%

Evidence for an intrinsic energetic ceiling in free‐ranging kittiwakes Rissa tridactyla

Welcker

Moe

Bech

et al. 2009

Journal of Animal Ecology

View full text Add to dashboard Cite

Summary 1.The rate at which free-living animals can expend energy is limited but the causes of this limitation are not well understood. Theoretically, energy expenditure may be intrinsically limited by physiological properties of the animal constraining its capacity to process energy. Alternatively, the limitation could be set extrinsically by the amount of energy available in the environment or by a fitness trade-off in terms of reduced future survival associated with elevated metabolism. 2. We measured daily energy expenditure (DEE) using the doubly labelled water method in chickrearing black-legged kittiwakes (Rissa tridactyla) at a study site close to the northern limit of their breeding range over 5 years. We measured breeding success, foraging trip duration and diet composition as proxies of resource availability during these years and estimated the probability of parent kittiwakes to return to the colony in relation to their energy expenditure in order to determine whether kittiwakes adjust their DEE in response to variation in prey availability and whether elevated DEE is associated with a decrease in adult survival. 3. We found that DEE was strikingly similar across all five study years. There was no evidence that energy expenditure was limited by resource availability that varied considerably among study years. Furthermore, there was no evidence of a negative effect of DEE on adult return rate, which does not support the hypothesis of a survival cost connected to elevated energy expenditure. 4. The additional lack of variation in DEE with respect to ambient temperature, brood size or between sexes suggests that kittiwakes at a time of peak energy demands may operate close to an intrinsic metabolic ceiling independent of extrinsic factors.

show abstract

Section: Methodsmentioning

confidence: 99%

Evidence for an intrinsic energetic ceiling in free‐ranging kittiwakes Rissa tridactyla

Welcker

Moe

Bech

et al. 2009

Journal of Animal Ecology

View full text Add to dashboard Cite

show abstract

“…A review of studies employing hydrogen isotopes in four bird species revealed a considerable variation by which the dilution space differed from actual TBW, ranging from underestimates of 2.3% to overestimates of 18% (Table 3 in Speakman et al 2001). As has been noted frequently (Gessaman 1999;Mata et al 2006;Shaffer et al 2006), there is clearly a need for more bird studies evaluating estimates of TBW and other body components measured by isotope dilution against standard proximate body composition analysis.…”

Section: Introductionmentioning

confidence: 95%

“…Speakman et al (2001; Table 3) calculated an average of 4.7% by which actual TBW was overestimated by hydrogen isotope dilution in birds, based on nine studies on four species. Additional studies using hydrogen isotopes and the plateau approach reported 8.1% for the chicken Gallus gallus (Mata et al 2006), 8.4% for glaucous-winged gull Larus glaucescens nestlings (Hughes et al 1987), and 3.3% for the glaucous gull Larus hyperboreus (Shaffer et al 2006). However, at least part of the variation among studies is due to methodological factors.…”

Section: Tbw Measured By Deuterium Dilution and The Effect Of Equilibmentioning

confidence: 99%

“…However, at least part of the variation among studies is due to methodological factors. For instance, the study by Degen et al (1981), which was included in the average calculated by Speakman et al (2001), as well as those by Hughes et al (1987) and Shaffer et al (2006) included water adsorbed to feathers in TBW c . This plumage water cannot be accounted for by isotope dilution.…”

Section: Tbw Measured By Deuterium Dilution and The Effect Of Equilibmentioning

confidence: 99%

See 1 more Smart Citation

Evaluation of the Deuterium Dilution Method to Estimate Body Composition in the Barnacle Goose: Accuracy and Minimum Equilibration Time

Eichhorn¹,

Visser²

2008

Physiological and Biochemical Zoology

View full text Add to dashboard Cite

We examined body composition in barnacle geese (Branta leucopsis) by proximate carcass analysis and by deuterium isotope dilution. We studied the effect of isotope equilibration time on the accuracy of total body water (TBW) estimates and evaluated models to predict fat-free mass (FFM) and fat mass (FM) from different measurements varying in their level of invasiveness. Deuterium enrichment determined at 45, 90, and 180 min after isotope injection did not differ significantly. At all sampling intervals, isotope dilution spaces (TBW(d)) consistently overestimated body water determined by carcass analysis (TBW(c)). However, variance in the deviation from actual TBW was higher at the 45-min sampling interval, whereas variability was the same at 90 and 180 min, indicating that 90 min is sufficient time to allow for adequate equilibration. At 90 min equilibration time, deuterium isotope dilution overestimated TBW(c) by 7.1% +/= 2.6% (P < 0.001, paired t-test, n=20). This overestimate was consistent over the range of TBW studied, and TBW(c) could thus be predicted from TBW(d) (r2=0.976, P<0.001). Variation in TBW(c) and TBW(d) explained, respectively, 99% and 98% of the variation in FFM. FM could be predicted with a relative error of ca. 10% from TBW estimates in combination with body mass (BM). In contrast, BM and external body measurements allowed only poor prediction. Abdominal fat fresh mass was highly correlated to total FM and, if the carcass is available, allows simple means of fat prediction without dissecting the entire specimen.

show abstract

“…To calculate final body water volume, body mass at recapture was multiplied by the initial fractional water content, which has been validated in Shaffer et al (2006). CO 2 production was calculated using equation 2 in Nagy (1980); this equation assumes that body mass of the animal changes linearly with time.…”

Section: Field Metabolic Ratesmentioning

confidence: 99%

Foraging Behavior and Energetics of Albatrosses in Contrasting Breeding Environments

et al. 2017

View full text Add to dashboard Cite

Animals can maximize fitness by optimizing energy acquisition through the selection of favorable foraging habitats, but trade-offs exist between time spent in preferred feeding habitats, energetic costs of travel, and reproductive constraints. For pelagic seabirds, geographic distribution of suitable breeding islands can restrict access to marine prey resources and influence foraging strategies. Laysan (Phoebastria immutabilis) and black-footed albatrosses (P. nigripes) breeding in the Northwest Hawaiian Islands, and Indian yellow-nosed albatrosses (Thalassarche carteri) breeding in the Southern Indian Ocean, utilize productive subtropical-subpolar transition zones during their breeding and non-breeding periods, but this marine feature is at a comparatively greater distance for Hawaiian albatrosses during the breeding period due to location of nesting islands. We investigated the foraging behavior and energetics of these three species to evaluate how proximity to preferred marine habitats has influenced their overall foraging strategies. During incubation, all three species traveled to subtropical-subpolar transition zones, however, Hawaiian albatrosses ranged farther to reach this habitat. All species reduced time at sea during brooding, and Hawaiian albatrosses reduced their foraging ranges to distances similar to yellow-nosed albatrosses. As a consequence, Hawaiian albatrosses foraged in the warm, oligotrophic environment of the subtropical gyre during brooding while yellow-nosed albatrosses continued to forage in a subtropical-subpolar transition zone. Landing rates, an indicator of foraging effort, did not differ between reproductive stages and were highly variable within and among species. Hawaiian albatrosses generally spent more time in flight compared to yellow-nosed albatrosses, a strategy that may relate to searching for dispersed and unpredictable prey. Mean absolute field-metabolic rate (FMR) was greatest for black-footed albatrosses, and similar between Laysan and yellow-nosed albatrosses, but mass-specific FMR did not differ between species. Hawaiian albatrosses had lower total body water than yellow-nosed albatrosses (indicating greater lipid reserves), and had FMRs that fell below the allometric relationship for studied albatross species, attributes that likely reflect physiological adaptations for foraging in a low-productivity environment.

show abstract

Validation of Water Flux and Body Composition in Glaucous Gulls (Larus hyperboreus)

Cited by 8 publications

References 34 publications

Evidence for an intrinsic energetic ceiling in free‐ranging kittiwakes Rissa tridactyla

Evidence for an intrinsic energetic ceiling in free‐ranging kittiwakes Rissa tridactyla

Evaluation of the Deuterium Dilution Method to Estimate Body Composition in the Barnacle Goose: Accuracy and Minimum Equilibration Time

Foraging Behavior and Energetics of Albatrosses in Contrasting Breeding Environments

Contact Info

Product

Resources

About