The changes in growth, survival, food intake and body composition of Pseudogrus fulvidraco larvae and juveniles fed with Artemia nauplii

2013 ◽  
Vol 19 (6) ◽  
pp. 1034-1042
Author(s):  
Quan HUANG ◽  
Su JIANG ◽  
Kechong Qi ◽  
Congxin XIE ◽  
Lin SU
2014 ◽  
Vol 99 (9) ◽  
pp. 3247-3255 ◽  
Author(s):  
Athanasios D. Anastasilakis ◽  
Stergios A. Polyzos ◽  
Zacharias G. Saridakis ◽  
Georgios Kynigopoulos ◽  
Elpida C. Skouvaklidou ◽  
...  

2015 ◽  
Vol 2015 ◽  
pp. 1-9 ◽  
Author(s):  
D. M. Sontam ◽  
M. H. Vickers ◽  
J. M. O’Sullivan ◽  
M. Watson ◽  
E. C. Firth

Physical activity has a vital role in regulating and improving bone strength. Responsiveness of bone mass to exercise is age dependent with the prepubertal period suggested to be the most effective stage for interventions. There is a paucity of data on the effects of exercise on bone architecture and body composition when studied within the prepubertal period. We examined the effect of two forms of low-impact exercise on prepubertal changes in body composition and bone architecture. Weanling male rats were assigned to control (CON), bipedal stance (BPS), or wheel exercise (WEX) groups for 15 days until the onset of puberty. Distance travelled via WEX was recorded, food intake measured, and body composition quantified. Trabecular and cortical microarchitecture of the femur were determined by microcomputed tomography. WEX led to a higher lean mass and reduced fat mass compared to CON. WEX animals had greater femoral cortical cross-sectional thickness and closed porosity compared to CON. The different exercise modalities had no effect on body weight or food intake, but WEX significantly altered body composition and femoral microarchitecture. These data suggest that short-term mild voluntary exercise in normal prepubertal rats can alter body composition dependent upon the exercise modality.


2001 ◽  
Vol 15 (2) ◽  
pp. 117 ◽  
Author(s):  
Rachel Pamfilio Francischi ◽  
Luciana Oquendo Pereira ◽  
Antônio Herbert Lancha Junior

O objetivo principal desta revisão é avaliar as duas principais estratégias de tratamento nãofarmacológico de sobrepeso e obesidade, o uso de restrições energéticas e de exercícios físicos. Dietas hipocalóricas são efetivas para a perda de peso e de gordura, porém podem causar perda de massa magra e consequentemente redução nas taxas metabólicas. O treinamento físico isolado, sem controle alimentar, causa modesta perda de peso. Em associação com dietas, facilita a adesão ao controle alimentar e garante maior sucesso na manutenção da massa magra e redução na massa adiposa. Muitos trabalhos apontam que o treinamento aeróbio regular intensifica a perda de gordura, porém não impede a perda de massa magra. O treinamento de contra-resistência parece minimizar esta perda, porém há dados indicando que este tipo de atividade não intensifica a perda de gordura. A combinação do trabalho aeróbio ao treinamento de força pode garantir uma concomitante perda de gordura e manutenção de massa magra, porém poucos estudos observaram estes efeitos. Os benefícios metabólicos do treinamento regular parecem ocorrer em resposta a ambos tipos de exercício. Apesar da melhora na qualidade de vida em resposta a prática regular de atividades físicas ser consenso na literatura, ainda não há conclusões quanto aos efeitos do exercício físico para obesos no tocante às alterações na composição corporal, devido ao baixo número de indivíduos estudados e diferentes protocolos de estudo.


1997 ◽  
Vol 65 (2) ◽  
pp. 173-181 ◽  
Author(s):  
C. J. C. Phillips ◽  
P. N. Johnson ◽  
T. M. Arab

AbstractIn two experiments the growth, body composition and behaviour of steers and heifers kept in a building with natural day length only (average 9·7 h/day, treatment N) were compared with similar groups of animals kept in identical housing with the day length artificially extended to 16 h/day, (treatment L). The effects were recorded for 126 days in steers and 180 days in heifers, with both groups of animals being slaughtered in March when the two experiments ended. There were no effects over the entire experiment on the growth rate or food intake of either steers or heifers. The growth of the steers was reduced in the first 2 weeks after the lights were switched on but they gained more weight to compensate over the next 8 weeks. Over the whole experiment there was no treatment effect on food conversion ratio for either steers or heifers but it was reduced for steers on treatment L over the first 10 weeks. Steers in treatment N produced fatter carcasses than those on treatment L. Ultrasonic scanning of the heifers showed that those on treatment N deposited more fatty tissue between autumn and winter and less between winter and spring compared with those on treatment L.The behaviour of steers on treatment L did not vary over the experiment but steers on treatment N changed their behaviour with season. They slept for more time in winter and less in spring. Over the whole experiment steers on treatment L slept less and spent more time lying ruminating than those on treatment N but the total time spent lying was not affected by treatment. In contrast, the heifers on treatment L lay down for longer than those on treatment N, suggesting that the effect of supplementary light on lying time, which has been observed previously with dairy cows, is confined to female cattle. Heifers on treatment L started mounting each other earlier than heifers on treatment N and, like the steers, they spent less time sleeping It is concluded that extending the photoperiod for cattle in winter reduced body fatness in both steers and heifers and increased the time heifers spend lying down but that there were no major effects on growth rate or food intake.


2014 ◽  
Vol 188 ◽  
pp. 21-24 ◽  
Author(s):  
Ghada M. Anwar ◽  
Gamal Yamamah ◽  
Amani Ibrahim ◽  
Dalia El-Lebedy ◽  
Tarek M. Farid ◽  
...  

1988 ◽  
Vol 255 (4) ◽  
pp. R616-R621 ◽  
Author(s):  
J. O. Hill ◽  
J. C. Anderson ◽  
D. Lin ◽  
F. Yakubu

The effects of differences in meal frequency on body weight, body composition, and energy expenditure were studied in mildly food-restricted male rats. Two groups were fed approximately 80% of usual food intake (as periodically determined in a group of ad libitum fed controls) for 131 days. One group received all of its food in 2 meals/day and the other received all of its food in 10-12 meals/day. The two groups did not differ in food intake, body weight, body composition, food efficiency (carcass energy gain per amount of food eaten), or energy expenditure at any time during the study. Both food-restricted groups had a lower food intake, body weight gain, and energy expenditure than a group of ad libitum-fed controls. In conclusion, these results suggest that amount of food eaten, but not the pattern with which it is ingested, has a major influence on energy balance during mild food restriction.


2011 ◽  
Vol 107 (3) ◽  
pp. 445-449 ◽  
Author(s):  
John E. Blundell ◽  
Phillipa Caudwell ◽  
Catherine Gibbons ◽  
Mark Hopkins ◽  
Erik Näslund ◽  
...  

The idea of body weight regulation implies that a biological mechanism exerts control over energy expenditure and food intake. This is a central tenet of energy homeostasis. However, the source and identity of the controlling mechanism have not been identified, although it is often presumed to be some long-acting signal related to body fat, such as leptin. Using a comprehensive experimental platform, we have investigated the relationship between biological and behavioural variables in two separate studies over a 12-week intervention period in obese adults (totaln92). All variables have been measured objectively and with a similar degree of scientific control and precision, including anthropometric factors, body composition, RMR and accumulative energy consumed at individual meals across the whole day. Results showed that meal size and daily energy intake (EI) were significantly correlated with fat-free mass (FFM,Pvalues < 0·02–0·05) but not with fat mass (FM) or BMI (Pvalues 0·11–0·45) (study 1,n58). In study 2 (n34), FFM (but not FM or BMI) predicted meal size and daily EI under two distinct dietary conditions (high-fat and low-fat). These data appear to indicate that, under these circumstances, some signal associated with lean mass (but not FM) exerts a determining effect over self-selected food consumption. This signal may be postulated to interact with a separate class of signals generated by FM. This finding may have implications for investigations of the molecular control of food intake and body weight and for the management of obesity.


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