scholarly journals Seasonal Body Weight Variation in Five Species of Woodpeckers

The Condor ◽  
2005 ◽  
Vol 107 (4) ◽  
pp. 810-822
Author(s):  
Walter D. Koenig ◽  
Eric L. Walters ◽  
Jeffrey R. Walters ◽  
James S. Kellam ◽  
Klaus G. Michalek ◽  
...  
Keyword(s):  
Body Weight ◽  
Time Of Day ◽  
Temperate Zone ◽  
Food Storage ◽  
Picoides Borealis ◽  
Resident Species ◽  
Weight Variation ◽  
Dendrocopos Major ◽  
Red Cockaded Woodpecker ◽  
Winter Fattening

Abstract We investigated patterns of seasonal variation in body weight in six populations of five resident species of temperate-zone woodpeckers: Acorn Woodpecker (Melanerpes formicivorus), Red-bellied Woodpecker (M. carolinus), Red-cockaded Woodpecker (Picoides borealis), Downy Woodpecker (P. pubescens), and Great Spotted Woodpecker (Dendrocopos major). After controlling for time of day and overall body size, annual variation in body weight was small and generally not statistically significant. However, analysis revealed evidence of significant “winter fattening,” comparable in magnitude to other temperate-zone resident species, in three of the species. The degree of winter fattening did not correlate with either the size of the acorn crop (for the Acorn Woodpecker) or latitude, two variables potentially related to predictability of food resources. However, the smaller species exhibited significantly greater winter fattening than the larger species, as predicted by the hypothesis that energy storage should be more important for small-bodied species. Furthermore, the food-storing Acorn Woodpecker exhibited considerably less winter fattening than the nonfood-storing species, supporting the hypothesis that food storage provides an ecological alternative to winter fattening.

Relation of oxygen consumption to temperature and time of day in tropical anuran amphibians

1977 ◽  
Vol 25 (1) ◽  
pp. 19 ◽  
Author(s):  
WW Weathers ◽  
GK Snyder
Keyword(s):  
Body Weight ◽  
Oxygen Consumption ◽  
Entire Range ◽  
Time Of Day ◽  
Temperate Zone ◽  
Endogenous Rhythm ◽  
Thermal Coefficient ◽  
Continuous Darkness ◽  
Ambient Temperatures ◽  
Anuran Amphibians

Oxygen consumption was examined in three species of tropical frogs, Rana blythi, R. chalcanota and R. nicobariensis, at ambient temperatures between 20 and 35�C. Oxygen consumption varied directly with temperature over the entire range studied. The thermal coefficient (Ql0) for oxygen consumption for the three species averaged 2.67 (range 2.49-2.84), which is similar to that of temperate zone amphibians. At 25�C, the resting oxygen consumption of the tropical frogs averaged only 30% of that predicted for ranids on the basis of body weight. Oxygen consumption of R. nicobariensis and R. chalcanota, determined at 30�C in continuous darkness at 15-min intervals for 26 consecutive hours, exhibited an endogenous rhythm with a period of approximately 12 hours. Thus, while these tropical anurans resemble their temperate relatives in some respects, they possess greatly reduced levels of resting oxygen consumption.

Short-term Creatine Supplementation Improves Maximum Quadriceps Contraction in Women

2003 ◽  
Vol 13 (1) ◽  
pp. 87-96 ◽  
Author(s):  
Kenneth W. Kambis ◽  
Sarah K. Pizzedaz
Keyword(s):  
Body Weight ◽  
Muscle Function ◽  
Muscle Power ◽  
Average Power ◽  
Creatine Supplementation ◽  
Time Of Day ◽  
Fat Free Mass ◽  
Muscle Performance ◽  
Testing Procedures ◽  
Post Test

Creatine monohydrate (CrH2O) supplementation has been demonstrated to increase skeletal muscle power output in men. However, its effect upon women is not as clearly defined. This study investigated the effect of oral creatine supplementation upon muscle function, thigh circumference, and body weight in women. Twenty-two consenting college-age women were assigned to 1 of 2 groups matched for dietary and exercise habits, phase of menstrual cycle, and fat-free mass (FFM). After familiarization with testing procedures, pretrial measures of muscle function (5 repetitions 60 deg · s−1 and 50 repetitions 180 deg · s−1) were conducted during maximal voluntary concentric contraction of the preferred quadriceps muscle using an isokinetic dynamometer. Subjects then ingested 0.5 g · kg−1 FFM of either CrH2O or placebo (one fourth dosage 4 times daily) in a double-blind design for 5 days. Resistance exercise was prohibited. After the ingestion phase was completed, all measures were repeated at the same time of day as during pretrials. Statistical analysis revealed time to peak torque in quadriceps extension decreased from pre-test values of 255 ± 11 ms (mean ± SEM) to post-test values of 223 ± 3 ms; average power in extension increased from 103 ± 7 W pre-test to 112 ± 7 W post-test; and, during flexion, average power increased from 59 ± 5 W pre-test to 65 ± 5 W post-test in the creatine group as compared to controls (p ≤ .05). FFM, percent body fat, mid-quadriceps circumference, skinfold thickness of the measured thigh, and total body weight did not change for both groups between trials. We conclude that CrH2O improves muscle performance in women without significant gains in muscle volume or body weight.

Relationship Between Dynamic Changes in Body Weight and Blood Pressure: The ESTEBAN Survey

2019 ◽  
Vol 32 (10) ◽  
pp. 1003-1012 ◽  
Author(s):  
Alexandre Vallée ◽  
Anne-Laure Perrine ◽  
Valérie Deschamps ◽  
Jacques Blacher ◽  
Valérie Olié
Keyword(s):  
Blood Pressure ◽  
Body Weight ◽  
Pearson Correlation ◽  
Dietary Intakes ◽  
National Agency ◽  
Anthropometric Indices ◽  
Cross Sectional ◽  
Weight Variation ◽  
Minimum Age ◽  
Main Determinants

Abstract BACKGROUND Obesity is one of the main determinants of blood pressure. The aim of this study was to evaluate and quantify the relations between the different anthropometric indices and blood pressure (BP) stratified by gender. METHODS Cross-sectional analyses were performed using data from 2,105 adults from the ESTEBAN survey, a representative sample of the French population. Partial Pearson correlation analysis was used to assess the correlation between BP and anthropometric indices. Regressions were adjusted on age, antihypertensive therapies, socioeconomic levels, dietary intakes, and cardiovascular risk factors. A weight variation index, as adjusted weight variation/year, was calculated as (weight maximum − weight minimum) / (age of weight max − age of weight min). This index was adjusted on the BMI reported during the inclusion and time elapsed since weight variation from the moment of inclusion. RESULTS In the Esteban population stratified by gender, this weight index had the highest r-value of correlation with all BP parameters compared with all anthropometric indices (WC, WHR, WHtR) in both genders. In men, weight variation more than +1 kg/year is associated with 5.5 mm Hg increase in systolic BP and with 1.8 mm Hg increase in diastolic BP. In women, more than +1 kg/year is associated with 3.3 mm Hg increase in systolic BP and with 1.0 mm Hg increase in diastolic BP. CONCLUSION A dynamic view of body weight change appears more predictive in BP change than a static view expressed by BMI. Public health initiatives to maintain a youthful body weight during life course are majors to prevent hypertension. REGISTRATION The study was registered in the French National Agency for Medicines and Health Products Safety (no. 2012-A00456-34) and was approved by the Advisory Committee for Protection of Persons in Biomedical Research.

Decline of the Red-Cockaded Woodpecker (Picoides borealis) in Southeastern Oklahoma

1994 ◽  
Vol 132 (2) ◽  
pp. 275 ◽  
Author(s):  
Jeffrey F. Kelly ◽  
Sandra M. Pletschet ◽  
David M. Leslie
Keyword(s):  
Picoides Borealis ◽  
Red Cockaded Woodpecker

scholarly journals Effects of body weight variation in obese kidney recipients: a retrospective cohort study

2019 ◽  
Vol 13 (6) ◽  
pp. 1068-1076 ◽  
Author(s):  
Nuria Montero ◽  
Maria Quero ◽  
Emma Arcos ◽  
Jordi Comas ◽  
Inés Rama ◽  
...  
Keyword(s):  
Body Weight ◽  
Graft Survival ◽  
Graft Function ◽  
Obese Patients ◽  
Weight Changes ◽  
Kidney Transplant Recipients ◽  
Post Transplantation ◽  
Kidney Recipients ◽  
Weight Variation

Abstract Background Obese kidney allograft recipients have worse results in kidney transplantation (KT). However, there is lack of information regarding the effect of body mass index (BMI) variation after KT. The objective of the study was to evaluate the effects of body weight changes in obese kidney transplant recipients. Methods In this study we used data from the Catalan Renal Registry that included KT recipients from 1990 to 2011 (n = 5607). The annual change in post-transplantation BMI was calculated. The main outcome variables were delayed graft function (DGF), estimated glomerular filtration rate (eGFR) and patient and graft survival. Results Obesity was observed in 609 patients (10.9%) at the time of transplantation. The incidence of DGF was significantly higher in obese patients (40.4% versus 28.3%; P < 0.001). Baseline obesity was significantly associated with worse short- and long-term graft survival (P < 0.05) and worse graft function during the follow-up (P < 0.005). BMI variations in obese patients did not improve eGFR or graft or patient survival. Conclusions Our conclusion is that in obese patients, decreasing body weight after KT does not improve either short-term graft outcomes or long-term renal function.

scholarly journals Body Weight Variation Patterns as Predictors of Cognitive Decline over a 5 Year Follow-Up among Community-Dwelling Elderly (MAPT Study)

Nutrients ◽  
2019 ◽  
Vol 11 (6) ◽  
pp. 1371
Author(s):  
Kelly Giudici ◽  
Sophie Guyonnet ◽  
Yves Rolland ◽  
Bruno Vellas ◽  
Philipe de Souto Barreto ◽  
...  
Keyword(s):  
Weight Loss ◽  
Body Weight ◽  
Weight Gain ◽  
Hippocampal Volume ◽  
Community Dwelling ◽  
First Year ◽  
Z Score ◽  
Weight Variation ◽  
Variation Patterns

This study aimed to analyze associations between weight variation patterns and changes in cognitive function and hippocampal volume among non-demented, community-dwelling elderly. Sample was formed of 1394 adults >70 years (63.9% female), all volunteers from the Multidomain Alzheimer Preventive Trial (MAPT). Weight loss was defined as ≥5% of body weight decrease in the first year of follow-up; weight gain as ≥5% of weight increase; and stability if <5% weight variation. Cognition was examined by a Z-score combining four tests. Measures were assessed at baseline, 6, 12, 24, 36, 48, and 60 months of follow-up. Hippocampal volume was evaluated with magnetic resonance imaging in 349 subjects in the first year and at 36 months. Mixed models were performed. From the 1394 participants, 5.5% (n = 76) presented weight loss, and 9.0% (n = 125) presented weight gain. Cognitive Z-score decreased among all groups after 5 years, but decline was more pronounced among those who presented weight loss (adjusted between-group mean difference vs. stable: −0.24, 95%CI: −0.41 to −0.07; p = 0.006). After 3 years, hippocampal atrophy was observed among all groups, but no between-group differences were found. In conclusion, weight loss ≥5% in the first year predicted higher cognitive decline over a 5 year follow-up among community-dwelling elderly, independently of body mass index.

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