Indirect body fat manipulation and its effect on hibernation cycles in Citellus lateralis

1979 ◽  
Vol 57 (5) ◽  
pp. 976-978 ◽  
Author(s):  
John A. Phillips
Keyword(s):  
Food Availability ◽  
Body Fat ◽  
Growth Rates ◽  
Fat Content ◽  
Ground Squirrels ◽  
Fat Reserves ◽  
Citellus Lateralis ◽  
Body Fat Content ◽  
External Conditions

Observations of 92 laboratory born and raised golden-mantled ground squirrels (Citellus lateralis) revealed different growth rates and hibernation cycles between individuals with normal and maloccluded incisors. Weaned maloccluded infants fed at depressed rates and did not accumulate sufficient fat reserves for torpor to occur during their initial overwintering period. These same squirrels, after having had their incisors periodically cut during the following spring, fed at higher rates which led to both an increased peak autumn body fat content and a normalization of hibernation patterns during the second winter. The results suggest that even though the external conditions (photoperiod, temperature, food availability) may be consistent with those required for hibernation, the internal (endogenous) cycling cannot be initiated until sufficient fat levels have been attained.

Seasonal Changes of Fat Content in the Yellow Perch (Perca flavescens) of Two Laurentian Lakes

1975 ◽  
Vol 32 (11) ◽  
pp. 2214-2221 ◽  
Author(s):  
George E. Newsome ◽  
Gérard Leduc
Keyword(s):  
Body Fat ◽  
Yellow Perch ◽  
Perca Flavescens ◽  
Fat Content ◽  
The Body ◽  
Differential Mortality ◽  
Fat Reserves ◽  
Body Fat Content ◽  
Fat Level ◽  
Males And Females

Different body fat reserves in male and female yellow perch (Perca flavescens) may determine a marked differential mortality during the winter. This was revealed by a study in two Laurentian lakes of the Province of Quebec harboring stunted yellow perch with a marked predominance of males. The proportion of females in each year-class is markedly smaller, thus suggesting a higher mortality among immature and mature females than among males.In an attempt to explain the differential mortality, the seasonal variation of body fat content in males and females was measured; also the fat level at time of death caused by starvation under laboratory conditions was determined. The results showed that in the females the body fat content falls to a critical level of about 2% at least 4 mo before spawning, whereas the males maintain a fat level of almost 5% throughout winter.

scholarly journals Developmental patterns and body fat content of juvenile common hamsters (Cricetus cricetus l.)

2013 ◽  
Vol 58 (3-4) ◽  
pp. 71-85 ◽  
Author(s):  
Marc Pluch ◽  
Carina Siutz ◽  
Eva Millesi
Keyword(s):  
Body Mass ◽  
Litter Size ◽  
Body Fat ◽  
Growth Rates ◽  
Multiple Regression Model ◽  
Fat Content ◽  
Cricetus Cricetus ◽  
Mass Proportion ◽  
Body Fat Content ◽  
Free Ranging

Abstract The common hamster (Cricetus cricetus) is a facultative hibernator producing up to three litters per year. Juveniles born late in the season have less time to grow and prepare for the winter than early-born ones. We investigated a free-ranging population in an urban environment in Vienna, Austria. We compared body mass, proportion of body fat, as well as head, tibia and hind foot length between juveniles of first and second litters at natal emergence, four weeks post-emergence and shortly before onset of hibernation. In addition we tested for differences in growth rates during the first four weeks after emergence and for potential effects of sex and litter size. Capture-mark-recapture techniques were applied. Body fat content was calculated using a multiple regression model integrating morphometric parameters. At natal emergence, second litter offspring were larger and heavier than those of first litters. Litter size did not account for these differences. During the first week after natal emergence, first litter pups gained body mass faster, and during the first two weeks also showed faster head and tibia growth rates than second litter pups. Four weeks after natal emergence, however, second litter juveniles were still larger and heavier than first litter ones. Body fat content four weeks post-emergence did not differ between first and second litters but decreased with litter size. Shortly before onset of hibernation, however, first litter juveniles, which had more time to grow and accumulate body fat, exceeded second-litter ones in all measured parameters. In all litters investigated, we found no sex difference at natal emergence but males were heavier and larger than females four weeks thereafter demonstrating that the commonly known sexual dimorphism in this species developed during this period. Considering the time constraints late born juveniles face, the con ditional advance at natal emergence is assumed to be adaptive by increasing the chances for these individuals to survive overwinter despite the limited time to prepare for the hibernation period

Total body fat content and fat topography are associated differently with in vivo glucose metabolism in nonobese and obese nondiabetic women

Diabetes ◽  
1992 ◽  
Vol 41 (9) ◽  
pp. 1151-1159 ◽  
Author(s):  
E. Bonora ◽  
S. Del Prato ◽  
R. C. Bonadonna ◽  
G. Gulli ◽  
A. Solini ◽  
...  
Keyword(s):  
Glucose Metabolism ◽  
Body Fat ◽  
Fat Content ◽  
Body Fat Content ◽  
Total Body Fat ◽  
Total Body

scholarly journals Effect of ambient temperature on the productive and carcass traits of growing rabbits divergently selected for body fat content

animal ◽  
2020 ◽  
pp. 100096
Author(s):  
Z. Matics ◽  
Z. Gerencsér ◽  
R. Kasza ◽  
K. Terhes ◽  
I. Nagy ◽  
...  
Keyword(s):  
Ambient Temperature ◽  
Body Fat ◽  
Carcass Traits ◽  
Fat Content ◽  
Body Fat Content

Whole body fat: Content and distribution

2013 ◽  
Vol 73 ◽  
pp. 56-80 ◽  
Author(s):  
E.L. Thomas ◽  
J.A. Fitzpatrick ◽  
S.J. Malik ◽  
S.D. Taylor-Robinson ◽  
J.D. Bell
Keyword(s):  
Body Fat ◽  
Fat Content ◽  
Whole Body ◽  
Body Fat Content

scholarly journals Total Body Fat Content versus BMI in 4-Year-Old Healthy Swedish Children

2013 ◽  
Vol 2013 ◽  
pp. 1-4 ◽  
Author(s):  
Elisabet Forsum ◽  
Eva Flinke Carlsson ◽  
Hanna Henriksson ◽  
Pontus Henriksson ◽  
Marie Löf
Keyword(s):  
Body Composition ◽  
Body Fat ◽  
Fat Content ◽  
Overweight And Obesity ◽  
Air Displacement Plethysmography ◽  
High Body ◽  
Childhood Overweight And Obesity ◽  
Body Fat Content ◽  
Measurement Session ◽  
Total Body

Childhood overweight and obesity, a worldwide problem, is generally identified using BMI (body mass index). However, this application of BMI has been little investigated in children below 5 years of age due to a lack of appropriate methods to assess body composition. Therefore, we used air displacement plethysmography (ADP) to study 4.4-year old boys and girls since this method is accurate in young children if they accept the requirements of the measurement. The purpose was to analyze the relationship between BMI and body fat in these children. Body composition was assessed in 76 (43 boys, 33 girls) of the 84 children brought to the measurement session. Boys and girls contained25.2±4.7and26.8±4.0% body fat, respectively. BMI-based cut-offs for overweight could not effectively identify children with a high body fat content. There was a significant (P<0.001) but weak (r=0.39) correlation between BMI and body fat (%). In conclusion, requirements associated with a successful assessment of body composition by means of ADP were accepted by most 4-year-olds. Furthermore, BMI-based cut-offs for overweight did not effectively identify children with a high body fatness and BMI explained only a small proportion of the variation in body fat (%) in this age group.

Body fat content and serum lipid levels

1980 ◽  
Vol 77 (2) ◽  
pp. 149-152 ◽  
Author(s):  
SHARLEEN MATTER ◽  
ARTHUR WELTMAN ◽  
BRYANT A. STAMFORD
Keyword(s):  
Body Fat ◽  
Serum Lipid ◽  
Fat Content ◽  
Lipid Levels ◽  
Serum Lipid Levels ◽  
Body Fat Content

Body Fat Content Does Not Affect Body's Maximal Muscle Strength

2016 ◽  
Vol 34 (2) ◽  
pp. 153 ◽  
Author(s):  
Jonguk Choi ◽  
Sunghoon Kim ◽  
Sunghoon Hur ◽  
Jongsam Lee
Keyword(s):  
Muscle Strength ◽  
Body Fat ◽  
Fat Content ◽  
Body Fat Content ◽  
Maximal Muscle Strength

The relationship between thyroid hormone and lipid metabolism/body fat content in euthyroid male patients with type 2 diabetes mellitus in China: A cross-sectional study

2020 ◽  
Author(s):  
Xia Sun ◽  
Liping Chen ◽  
Rongzhen Wu ◽  
Dan Zhang ◽  
Yinhui He
Keyword(s):  
Body Fat ◽  
Visceral Fat ◽  
Fat Content ◽  
Body Fat Percentage ◽  
Fat Percentage ◽  
Body Fat Content ◽  
Male Patients ◽  
The Relationship ◽  
Visceral Fat Content

Abstract Background: This study compared the relationship between thyroid hormones and lipid metabolism/body fat content in euthyroid male patients with type 2 diabetes mellitus (T2DM) in China. Methods: A total of 64 male patients who were diagnosed as T2DM and 64 non-diabetic males who underwent health examination were matched according to age at a 1:1 ratio. Results: The 32 subjects in each sub-group showed differences in age, body mass index (BMI), mean arterial pressure, waist circumference, visceral fat content, body fat percentage, HbA1c, HOMA-IR, FT3, TSH, HDL-c, adiponectin, leptin, visfatin and TNF-α (all P < 0.05). In the overall population, FT3 was positively correlated with body fat percentage (r=0.21, P=0.02), and negatively correlated with HOMA-IR (r=-0.18, P=0.04) and visfatin (r=-0.47, P <0.01); TSH was positively correlated with body fat percentage (r=0.23, P=0.01). In the T2DM-OB group FT3 was positively correlated with BMI (r=0.45, P <0.05), visceral fat content (r=0.50, P <0.05), and body fat percentage (r=0.44, P <0.05); FT4 was positively correlated with visceral fat content (r=0.38, P <0.05); and TSH was positively correlated with HOMA-IR (r=0.39, P <0.05). Conclusion: TSH increased in obese people and FT3 was lower in patients with T2DM.

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