Diurnal variations of the glycogen and fat stores in the liver and breast muscle of the insect bat, Tadarida nigeriae

1979 ◽  
Vol 23 (4) ◽  
pp. 659-661 ◽  
Author(s):  
Eyo E. Okon ◽  
R.J. Ekanem
Keyword(s):  
Diurnal Variations ◽  
Breast Muscle ◽  
Fat Stores

scholarly journals Protein loss during long-distance migratory flight in passerine birds: adaptation and constraint

2002 ◽  
Vol 205 (5) ◽  
pp. 687-695 ◽  
Author(s):  
Regine Schwilch ◽  
Alessandra Grattarola ◽  
Fernando Spina ◽  
Lukas Jenni
Keyword(s):  
Muscle Protein ◽  
Late Phase ◽  
Passerine Bird ◽  
Breast Muscle ◽  
Flight Performance ◽  
Protein Catabolism ◽  
Protein Loss ◽  
Long Distance ◽  
Garden Warbler ◽  
Fat Stores

SUMMARYDuring long-distance flights, birds catabolize not only fat but also protein. Because there is no storage form of protein, protein catabolism entails a structural or functional loss. In this study, we investigated which organs were most reduced in lean mass during different phases of fat store loss and whether protein loss can be regarded as adaptive or as a constraint. Body and organ composition were analysed both during the autumn migration over continental Europe (sample from Switzerland) and after a long-distance flight over the Sahara and the Mediterranean Sea in spring (sample from Ventotene, Italy) in four species of passerine bird: pied flycatcher Ficedula hypoleuca, willow warbler Phylloscopus trochilus, garden warbler Sylvia borin and barn swallow Hirundo rustica. Large variations in protein mass occurred when long non-stop flights were performed. After a long-distance flight, birds showed a marked increase in net protein loss when fat stores were nearing depletion (analogous to the late phase of endurance fasting when the rate of protein catabolism is increased). When fat reserves were above approximately 5–10 %, protein was derived from all organs, but particularly from the breast muscles. When fat stores diminished further and protein catabolism increased, the mass of the digestive organs was reduced fastest. When the decrease in breast muscle mass during flight was regarded in terms of potential flight performance, it appeared that the use of breast muscle protein with decreasing body mass can be regarded as adaptive as long as fat stores did not reach a critical level. Below approximately 5–10 % body fat, however, protein loss reduced flight performance. This demonstrates that the phase of fasting (the size of the remaining fat stores) is an important condition for understanding the occurrence and effects of protein loss during endurance flights.

DIURNAL VARIATIONS IN THE EXCRETION PATTERNS OF FREE AND CONJUGATED CATECHOLAMINES IN URINE.

1983 ◽  
Vol 104 (2_Supplb) ◽  
pp. S177-S187
Author(s):  
J. Odink ◽  
H. Sandman ◽  
A.J. Speek ◽  
W.H.P. Schreurs
Keyword(s):  
Diurnal Variations ◽  
Catecholamines In Urine

Are Changes in Whole-Body Insulin Sensitivity during Pregnancy Related to Changes in Ectopic Fat Stores?

Diabetes ◽  
2018 ◽  
Vol 67 (Supplement 1) ◽  
pp. 1408-P
Author(s):  
KIMBERLY VESCO ◽  
NICOLE E. MARSHALL ◽  
WILLIAM ROONEY ◽  
MICHAEL C. LEO ◽  
ERIC BAETSCHER ◽  
...  
Keyword(s):  
Insulin Sensitivity ◽  
Whole Body ◽  
Ectopic Fat ◽  
Fat Stores

1386-P: A Comparison of Ectopic Fat Stores and Insulin Sensitivity among Women With and Without Gestational Diabetes

Diabetes ◽  
2019 ◽  
Vol 68 (Supplement 1) ◽  
pp. 1386-P
Author(s):  
KIMBERLY VESCO ◽  
MICHAEL C. LEO ◽  
MELANIE FRANCISCO ◽  
NICOLE E. MARSHALL ◽  
WILLIAM ROONEY ◽  
...  
Keyword(s):  
Insulin Sensitivity ◽  
Gestational Diabetes ◽  
Ectopic Fat ◽  
Fat Stores

0870 Percentages of milk fat, lactose, and protein are affected by diurnal variations in dairy goats

2016 ◽  
Vol 94 (suppl_5) ◽  
pp. 418-418
Author(s):  
F. Rosa ◽  
J. S. Osorio ◽  
J. Lohakare ◽  
M. Moridi ◽  
A. Ferrari ◽  
...  
Keyword(s):  
Milk Fat ◽  
Diurnal Variations ◽  
Dairy Goats

Radiocarbon (14C) Diurnal Variations in Fine Particles at Sites Downwind from Tokyo, Japan in Summer

2011 ◽  
Vol 45 (16) ◽  
pp. 6784-6792 ◽  
Author(s):  
Akihiro Fushimi ◽  
Rota Wagai ◽  
Masao Uchida ◽  
Shuichi Hasegawa ◽  
Katsuyuki Takahashi ◽  
...  
Keyword(s):  
Fine Particles ◽  
Diurnal Variations

scholarly journals Mineral Element Deposition and Gene Expression across Different Tissues of Cherry Valley Ducks

Animals ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 238
Author(s):  
Qianqian Song ◽  
Yi Zhang ◽  
Hao Bai ◽  
Li Zhong ◽  
Xiaofan Li ◽  
...  
Keyword(s):  
Significant Negative Correlation ◽  
Mineral Elements ◽  
Breast Muscle ◽  
Thigh Muscle ◽  
Mrna Levels ◽  
High Quality ◽  
Atomic Fluorescence ◽  
Breeding Efficiency ◽  
Almost All ◽  
Different Tissues

This study was conducted to investigate the deposition of several mineral elements and the mRNA levels of mineral-related genes across different tissues of cherry valley ducks. The contents of magnesium (Mg), potassium (K), zinc (Zn), and selenium (Se) in ducks’ breast muscle, thigh muscle, liver, skin, and tibia at the age of 0, 21, 35, 49, and 63 days, respectively, were measured using an atomic fluorescence spectrophotometer, while the mRNA levels of mineral-related genes were detected by qRT-PCR. The results revealed that the dynamics of Mg and K were generally similar in each tissue, with a significant positive correlation (p < 0.05). In the breast muscle, thigh muscle, and liver, the contents of almost all mineral elements reached their peak values (p < 0.05) at the age of 49 to 63 days. Interestingly, the expression of most mineral-related genes was the highest at birth (p < 0.05). In addition, there was a significant negative correlation between the expression of ATP1A1 and the deposition of K (r = −0.957, p < 0.05), and a similar result was found for the expression of ATP8 and the deposition of Zn (r = −0.905, p < 0.05). Taken together, Mg and K could be used as joint indicators for the precise breeding of the high-quality strain of cherry valley ducks, while the age of 49 to 63 days could be used as the reference for the best marketing age. In addition, ATP1A1 and ATP8 could be used as the key genes to detect K and Zn, respectively. Hence, the findings of this study can be used to improve the production and breeding efficiency of high-quality meat ducks.

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