scholarly journals Developmental speed affects ecological stoichiometry and adult fat reserves in Drosophila melanogaster

2020 ◽  
Vol 71 (1) ◽  
pp. 1-20
Author(s):  
Indrikis A. Krams ◽  
Ronalds Krams ◽  
Priit Jõers ◽  
Māris Munkevics ◽  
Giedrius Trakimas ◽  
...  
Keyword(s):  
Body Composition ◽  
Drosophila Melanogaster ◽  
Body Mass ◽  
Developmental Plasticity ◽  
Nitrogen Concentration ◽  
Fruit Flies ◽  
Climatic Conditions ◽  
Feeding Rates ◽  
Nitrogen Levels ◽  
Fat Reserves

Abstract The elemental composition of organisms belongs to a suite of functional traits that change during development in response to environmental conditions. However, associations between adaptive variations in developmental speed and elemental body composition are not well understood. We compared body mass, elemental body composition, food uptake and fat metabolism of Drosophila melanogaster male fruit flies in relation to their larval development speed. Slowly developing flies had higher body carbon concentration than rapidly developing and intermediate flies. Rapidly developing flies had the highest body nitrogen concentration, while slowly developing flies had higher body nitrogen levels than flies with intermediate speed of development. The carbon-to-nitrogen ratio was therefore lower in rapidly developing flies than in slow and intermediate flies. We also had a group of flies grown individually and their body mass and elemental body composition were similar to those of rapidly developing individuals grown in groups. This suggests that rapid growth is not suppressed by stress. Feeding rates were lowest in the slowly developing flies. The amount of triacylglycerides was highest in the flies with intermediate developmental speed which optimizes development under many climatic conditions. Although low food intake slows down developmental speed and the accumulation of body fat reserves in slowly developing flies, their phenotype conceivably facilitates survival under higher stochasticity of their environments. Rapidly developing flies grew with less emphasis on storage build-up. Overall, this study shoes that a combination of bet-hedging, adaptive tracking and developmental plasticity enables fruit flies to respond adaptively to environmental uncertainty.

scholarly journals Ecological stoichiometry and adult fat reserves suggest bet-hedging in Drosophila melanogaster development

2019 ◽  
Author(s):  
Tatjana Krama ◽  
Ronalds Krams ◽  
Priit Jõers ◽  
Māris Munkevics ◽  
Giedrius Trakimas ◽  
...  
Keyword(s):  
Body Composition ◽  
Drosophila Melanogaster ◽  
Larval Development ◽  
Nitrogen Concentration ◽  
Fruit Flies ◽  
Climatic Conditions ◽  
Feeding Rates ◽  
Bet Hedging ◽  
Intermediate Group ◽  
Fat Reserves

AbstractThe elemental composition of organisms relates to a suite of functional traits that change during development in response to environmental conditions. It may be a part of a phenomenon known as ‘developmental programming’, which hypothetically creates phenotypes that are better adapted to their environments. However, associations between developmental speed and elemental body composition are not well understood. We compared body mass, elemental body composition, food uptake and fat metabolism of Drosophila melanogaster Oregon-R male fruit flies across the time gradient of their larval development. The results showed that flies with intermediate and rapid developmental speeds were heavier than slowly developing flies. Slowly developing flies had higher body carbon concentration than rapidly developing and intermediate flies. Rapidly developing flies had the highest body nitrogen concentration, while slowly developing flies had higher body nitrogen levels than flies with intermediate speed of development. The carbon-to-nitrogen ratio was therefore lower in rapidly developing flies than in slow and intermediate flies. Feeding rates were lowest in the slowly developing flies. The amount of storage fats was highest in the intermediate group. This means that the growth of rapidly developing flies is not suppressed by stress and they actively convert the food they consume into growth with less emphasis on storage build-up, suggesting bet-hedging in the larval development. In contrast, flies in the intermediate developmental group had the greatest fat reserves which optimize fitness under many climatic conditions. Low food intake may slow down development and the accumulation of body fat reserves in slowly developing flies. However, at the cost of slower growth, their phenotype conceivably facilitates survival under higher stochasticity of their ephemeral environments spoiled by metabolic waste due to high density of conspecifics. Overall, this study suggests that bet-hedging may be a common developmental strategy in fruit flies to cope with environmental uncertainty.

The ontogeny of body composition and gut morphology in free-ranging muskrats

1992 ◽  
Vol 70 (7) ◽  
pp. 1381-1388 ◽  
Author(s):  
John A. Virgl ◽  
François Messier
Keyword(s):  
Body Composition ◽  
Digestive Tract ◽  
Body Mass ◽  
Breeding Habitat ◽  
Fat Tissue ◽  
Adult Body Mass ◽  
Skeletal Size ◽  
Fat Reserves ◽  
Adult Body ◽  
Intestine Length

We quantified changes in body composition, external morphology, and digestive tract morphology during the growth and development of muskrats from two marsh environments in central Saskatchewan, Canada. A total of 141 individuals were analysed, with body masses ranging from 20 g (newborns) to >800 g (prior to first reproduction). The growth rate of the digestive tract in nursing young was rapid, and at weaning juveniles had attained 75% of adult large and small intestine length, but only approximately 20% of adult body mass. At birth, muskrats contained no fat tissue, but accumulated fat reserves during the early stages of nursing. Fat reserves were then exhausted during weaning. Protein content also exhibited marked variation during the nursing–weaning period. As juveniles matured, the proportion of protein and ash became relatively constant at approximately 25 and 4.5% of body mass, respectively. Conversely, the proportion of fat tissue continued to increase with body mass, and was inversely related to water content. The accumulation of fat reserves from autumn through early winter was similar to that exhibited by adults and was probably associated with the presence of energy-rich food. Growth generally ceased in mid-October. Prior to the start of the reproductive season, juveniles had attained 77% of adult body mass and 95% of adult skeletal size. The growth diapause in juveniles from mid-October through March may limit their access to primary breeding habitat the following spring.

scholarly journals Maternal and paternal sugar consumption interact to modify offspring life history and physiology

2021 ◽  
Author(s):  
Tara-Lyn Camilleri-Carter ◽  
Damian K Dowling ◽  
Rebecca Robker ◽  
Matthew Piper
Keyword(s):  
Drosophila Melanogaster ◽  
Life History ◽  
Body Mass ◽  
Adaptive Response ◽  
Fruit Flies ◽  
Sugar Consumption ◽  
Paternal Effects ◽  
Intergenerational Effects ◽  
Two Generations ◽  
Additive Interactions

Intergenerational effects on offspring phenotypes occur in response to variation in both maternal and paternal nutrition. Because the combined maternal and paternal effects are rarely considered together however, their relative contributions, and the capacity for interactions between parental diets to shape offspring life history and physiology are not understood. To address this, we altered sucrose levels of adult fruit flies (Drosophila melanogaster) prior to mating, across two generations, producing parent-parent and parent-offspring combinations that were either matched or mismatched in dietary sucrose. We then measured lifespan, fecundity, body mass, and triglyceride levels in parents and offspring. We reveal complex non-additive interactions, that involve diets of each parent and offspring to shape offspring phenotypes, but the effects were generally not consistent with an adaptive response to parental diet. Notably, we find that interacting parental flies (sires and dams) lived longer when their sucrose treatments were matched, but they produced shorter-lived offspring.

Agronomic performance of autumn- and winter-cropped Indian mustard (Brassica juncea L.) in response to varying levels of nitrogen fertiliser

2020 ◽  
pp. 83-95
Author(s):  
Bent Al-Hoda Asghari ◽  
Mohsen Yousefi ◽  
Katarzyna Możdżeń ◽  
Joanna Puła ◽  
Peiman Zandi ◽  
...  
Keyword(s):  
Brassica Juncea ◽  
Seed Yield ◽  
Agronomic Traits ◽  
Growth Parameters ◽  
Indian Mustard ◽  
Climatic Conditions ◽  
Plant Seed ◽  
Nitrogen Fertiliser ◽  
Nitrogen Levels ◽  
Cropping Seasons

Indian mustard (Brassica juncea L. Czern) cultivation is suggested for regions with short seasons and low rainfall. Although there have been many studies conducted on agronomic production of mustard in Iran, the information regarding the interactive impact of cropping seasons and nitrogen fertiliser on growth characteristics and yield quality of mustard plant is still insufficient and requires further investigation. This study focused on the possible implications of different cropping seasons and different nitrogen levels on selected agronomic traits in mustard. In this experiment, five different doses of nitrogen and two sowing periods were used to assess for their combined effects on the growth parameters, seed yield and agronomic characteristics of mustard in the semi-arid climatic conditions of Takestan. The results revealed that cultivation seasons and nitrogen rates had a significant effect on plant height, biomass yield, number of siliques per plant, seed oil content and seed yield.

Comparison of the Effect of Soy protein and Whey protein on Body Composition: A Meta-Analysis of Randomized Clinical Trials

2021 ◽  
pp. 1-27
Author(s):  
Masoome Piri Damaghi ◽  
Atieh Mirzababaei ◽  
Sajjad Moradi ◽  
Elnaz Daneshzad ◽  
Atefeh Tavakoli ◽  
...  
Keyword(s):  
Body Composition ◽  
Whey Protein ◽  
Lean Body Mass ◽  
Body Mass ◽  
Body Fat ◽  
Fat Mass ◽  
Soy Protein ◽  
Protein Supplementation ◽  
Body Fat Percentage ◽  
Fat Percentage

Abstract Background: Essential amino acids (EAAs) promote the process of regulating muscle synthesis. Thus, whey protein that contains higher amounts of EAA can have a considerable effect on modifying muscle synthesis. However, there is insufficient evidence regarding the effect of soy and whey protein supplementation on body composition. Thus, we sought to perform a meta-analysis of published Randomized Clinical Trials that examined the effect of whey protein supplementation and soy protein supplementation on body composition (lean body mass, fat mass, body mass and body fat percentage) in adults. Methods: We searched PubMed, Scopus, and Google Scholar, up to August 2020, for all relevant published articles assessing soy protein supplementation and whey protein supplementation on body composition parameters. We included all Randomized Clinical Trials that investigated the effect of whey protein supplementation and soy protein supplementation on body composition in adults. Pooled means and standard deviations (SD) were calculated using random-effects models. Subgroup analysis was applied to discern possible sources of heterogeneity. Results: After excluding non-relevant articles, 10 studies, with 596 participants, remained in this study. We found a significant increase in lean body mass after whey protein supplementation weighted mean difference (WMD: 0.91; 95% CI: 0.15, 1.67. P= 0.019). Subgroup analysis, for whey protein, indicated that there was a significant increase in lean body mass in individuals concomitant to exercise (WMD: 1.24; 95% CI: 0.47, 2.00; P= 0.001). There was a significant increase in lean body mass in individuals who received 12 or less weeks of whey protein (WMD: 1.91; 95% CI: 1.18, 2.63; P<0.0001). We observed no significant change between whey protein supplementation and body mass, fat mass, and body fat percentage. We found no significant change between soy protein supplementation and lean body mass, body mass, fat mass, and body fat percentage. Subgroup analysis for soy protein indicated there was a significant increase in lean body mass in individuals who supplemented for 12 or less weeks with soy protein (WMD: 1.48; 95% CI: 1.07, 1.89; P< 0.0001). Conclusion: Whey protein supplementation significantly improved body composition via increases in lean body mass, without influencing fat mass, body mass, and body fat percentage.

scholarly journals Changes in Children’s Body Composition and Posture during Puberty Growth

Children ◽  
2021 ◽  
Vol 8 (4) ◽  
pp. 288
Author(s):  
Wojciech Rusek ◽  
Joanna Baran ◽  
Justyna Leszczak ◽  
Marzena Adamczyk ◽  
Rafał Baran ◽  
...  
Keyword(s):  
Body Composition ◽  
Adipose Tissue ◽  
Regression Analysis ◽  
Body Mass ◽  
Pelvic Obliquity ◽  
The Body ◽  
Body Posture ◽  
Older Children ◽  
The Difference ◽  
The Right

The main goal of our study was to determine how the age of children, puberty and anthropometric parameters affect the formation of body composition and faulty body posture development in children. The secondary goal was to determine in which body segments abnormalities most often occur and how gender differentiates the occurrence of adverse changes in children’s body posture and body composition during puberty. The study group consisted of 464 schoolchildren aged from 6–16. Body posture was assessed with the Zebris system. The composition of the body mass was tested with Tanita MC 780 MA body mass analyzer and the body height was measured using a portable stadiometer PORTSTAND 210. The participants were further divided due to the age of puberty. Tanner division was adopted. The cut-off age for girls is ≥10 years and for boys it is ≥12 years. The analyses applied descriptive statistics, the Pearson correlation, stepwise regression analysis and the t-test. The accepted level of significance was p < 0.05. The pelvic obliquity was lower in older children (beta = −0.15). We also see that age played a significant role in the difference in the height of the right pelvis (beta = −0.28), and the difference in the height of the right shoulder (beta = 0.23). Regression analysis showed that the content of adipose tissue (FAT%) increased with body mass index (BMI) and decreased with increasing weight, age, and height. Moreover, the FAT% was lower in boys than in girls (beta negative equal to −0.39). It turned out that older children (puberty), had greater asymmetry in the right shoulder blade (p < 0.001) and right shoulder (p = 0.003). On the other hand, younger children (who were still before puberty) had greater anomalies in the left trunk inclination (p = 0.048) as well as in the pelvic obliquity (p = 0.008). Girls in puberty were characterized by greater asymmetry on the right side, including the shoulders (p = 0.001), the scapula (p = 0.001) and the pelvis (p < 0.001). In boys, the problem related only to the asymmetry of the shoulder blades (p < 0.001). Girls were characterized by a greater increase in adipose tissue and boys by muscle tissue. Significant differences also appeared in the body posture of the examined children. Greater asymmetry within scapulas and shoulders were seen in children during puberty. Therefore, a growing child should be closely monitored to protect them from the adverse consequences of poor posture or excessive accumulation of adipose tissue in the body.

scholarly journals Sex differences in leptin and cardiometabolic profile after exercise intervention in physically inactive adults with primary hypertension and obesity

2021 ◽  
Vol 28 (Supplement_1) ◽  
Author(s):  
SMM Maldonado-Martin ◽  
PC Corres ◽  
AMAB Martinezaguirre-Betolaza ◽  
BJI Jurio-Iriarte ◽  
MTE Tous-Espelosin ◽  
...  
Keyword(s):  
Body Composition ◽  
Sex Differences ◽  
Aerobic Exercise ◽  
Body Mass ◽  
Primary Hypertension ◽  
Public Institution ◽  
Hypocaloric Diet ◽  
Moderate Intensity ◽  
Control Group ◽  
Physically Inactive

Abstract Funding Acknowledgements Type of funding sources: Public Institution(s). Main funding source(s): University of the Basque Country OnBehalf GIKAFIT PURPOSES. To analyse the change on leptin, body composition, blood pressure (BP), cardiorespiratory fitness (CRF) and some biochemical parameters in physically inactive women and men with primary hypertension (HTN) and obesity, and to evaluate the potential sex differences in the change after intervention. METHODS. Participants (n = 37 women, n= 40 men, 52.9 ± 6.9 yrs) from the EXERDIET-HTA study were randomized into attention control group (physical activity recommendations) or one of three supervised aerobic exercise groups [two days/week: high-volume (HV) with 45 min of moderate-intensity continuous training, HV and high-intensity interval training (HV-HIIT), and low volume-HIIT (LV-HIIT, 20 min)]. All participants received the same hypocaloric diet. All variables were assessed pre and post intervention (16 weeks). 24 h ambulatory BP monitoring was used to analyze systolic and diastolic BP. A cardiopulmonary exercise test was performed to determine peak oxygen uptake (VO2peak). RESULTS. Following the intervention, there were increments (P &lt; 0.01) in CRF by VO2peak (Women, W = 21.1 ± 3.7 vs. 24.6 ± 4.4 mL·kg-1·min-1, Men, M = 26.3 ± 6.0 vs. 33.1 ± 10.2 mL·kg-1·min-1) and decreases (P &lt; 0.05) in leptin (W = 49.5 ± 23.0 vs. 41.8 ± 19.9 ng/mL, M = 20.5 ± 14.8 vs. 12.9 ± 18.6 ng/mL), body mass (W = 84.7 ± 12.1 vs. 80.3 ± 11.5 kg, M = 97.9 ± 14.4 vs. 91.5 ± 13.3 kg), waist perimeter (W = 97.3 ± 10.7 vs. 94.3 ± 10.9 cm, M = 107.9 ± 8.7 vs. 101.5 ± 7.9 cm), fat mass (W = 42.3 ± 5.1 vs. 38.6 ± 8.4 %, M = 31.2 ± 5.0 vs. 28.0 ± 4.4 %), systolic BP (M = 136.5 ± 12.1 vs. 129.3 ± 12.5 mmHg), diastolic BP (W = 76.2 ± 8.9 vs. 74.1 ± 8.7 mmHg, M = 79.3 ± 7.2 vs. 75.0 ± 8.2 mmHg), total cholesterol (M = 216.1 ± 44.5 vs. 196.1 ± 35.0 mg/dL), insulin (W = 13.4 ± 7.9 vs. 9.4 ± 4.2 mU/L) values. There were significant between-sex differences in body mass (W=-5.2%, M=-6.5%, effect size, ES = 0.073), waist circumference (W=-3.1%, M=-5.9%, ES = 0.114), and VO2peak (W = 14.2%, M = 20.5%, ES = 0.059). CONCLUSIONS. Aerobic exercise along with hypocaloric diet is an effective non-pharmacological tool to induce beneficial changes in women and men in BP and leptin as a mediator of obesity-induced HTN, and other regulatory mechanisms such as body composition, CRF and biochemical profile. The found sex-related differences could confirm the need of individual non-pharmacological strategies.

Body phenotypes and sexual maturation in Brazilian and US adolescents: evidence for a change in body mass index Category

2020 ◽  
pp. 1-26
Author(s):  
Jéssica Cumpian Silva ◽  
Ana Elisa Madalena Rinaldi ◽  
Francisco de Assis Guedes Vasconcelos ◽  
Maria Alice Altenburg Assis ◽  
Camila Medeiros Mazzeti ◽  
...  
Keyword(s):  
Body Mass Index ◽  
Body Composition ◽  
Body Mass ◽  
Phase Angle ◽  
Sexual Maturation ◽  
Biochemical Parameters ◽  
Pubertal Development ◽  
The United States ◽  
Pubic Hair ◽  
Cholesterol Ratio

ABSTRACT Objective: Our study aimed to describe body phenotypes (BP) estimated by multivariate analysis and their association with body mass. Design: Body phenotypes were defined based on demographic variables, anthropometric data (body mass, height, skinfolds and circumferences), body composition (phase angle measured by bioelectrical impedance analysis), biochemical parameters (triglycerides, glucose, total cholesterol ratio/Low Density Lipoproteins (LDL), haemoglobin and sexual maturation (pubic hair and breasts or gonads). Analysis of variance (ANOVA) was performed to verify the differences between skin colour and the stages of pubertal development, body phenotypes, body composition, anthropometric, and biochemical variables. Setting: Cities of São Paulo-SP, Piracicaba-SP and Florianópolis-SC from Brazil and the United States. Participants: 9269 adolescents aged between 10 to 15 years old. Results: The composition of BP was similar in all surveys, which are: BP1 was composed by skinfolds, body mass and circumferences variables; BP2 by pubic hair, breast in girls or gonad in boys, height and age; BP3 by cholesterol, triglycerides and glucose; and BP4 by phase angle, haemoglobin and glucose (negative loading). There was a strong correlation (r = 0.9, p <0.001) between BP1 and body mass index. Conclusion: We highlighted independence observed between biochemical parameters, anthropometry, body composition and sexual maturation. BP may support the calculation of scores for diagnosis of obesity based on anthropometric variables and overcome ambiguity in the isolated use of body mass index.

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