SOME PHYSIOLOGICAL AND NUTRITIONAL ASPECTS OF THE DWARF CHICKEN

1971 ◽  
Vol 51 (1) ◽  
pp. 209-216 ◽  
Author(s):  
G. RAJARATNAM ◽  
J. D. SUMMERS ◽  
A. S. WOOD ◽  
E. T. MORAN Jr.
Keyword(s):  
Body Weight ◽  
Oxygen Consumption ◽  
Weight Gain ◽  
Body Temperature ◽  
Metabolic Rate ◽  
Body Weight Gain ◽  
Carcass Composition ◽  
Lower Body ◽  
Brand Name ◽  
Dwarf Chicken

A study was undertaken to investigate the feasibility of hypothyroidism as an explanation for the smaller body size and lower metabolic activity of the recessive sex-linked dwarf chicken. A significant increase in body weight gain and feed intake for dwarf chicks with little change in these parameters for normal chicks receiving a diet supplemented with Protamone (brand name for iodinated casein) suggests a hypothyroidic state for the dwarfs. Similarly, a significantly lower body temperature, oxygen consumption and basal metabolic rate with a higher percentage of carcass fat in dwarf chicks as compared with normal ones supports the above hypothesis. Protamone supplementation of the diet increased body temperature and metabolic rate, and altered the carcass composition of the dwarfs to values closer to that of normal chicks, again suggesting a low thyroxine output for the dwarfs.

Abstract 19336: Chronic Vagal Nerve Stimulation Causes Weight Loss by Reducing Food Intake and Feeding Efficiency in Mice

Circulation ◽  
2014 ◽  
Vol 130 (suppl_2) ◽  
Author(s):  
Harald M Stauss ◽  
Daniel P Dias ◽  
Donald A Morgan ◽  
Kamal Rahmouni
Keyword(s):  
Weight Loss ◽  
Body Weight ◽  
Oxygen Consumption ◽  
Weight Gain ◽  
Food Intake ◽  
Metabolic Rate ◽  
Body Weight Gain ◽  
Caloric Intake ◽  
Vagal Nerve ◽  
Feeding Efficiency

Chronic electrical vagal nerve stimulation (VNS) has emerged as a new tool to treat human diseases including obesity. Indeed, chronic VNS has been shown to cause weight loss in humans and in experimental animal models. However, the mechanisms for VNS-induced weight loss are largely unknown. We hypothesized that an increase in metabolic rate together with reduced caloric intake and reduced feeding efficiency (body weight gain per calories consumed) contribute to chronic VNS-induced weight loss or reduced weight gain. To test this hypothesis, we developed a miniaturized microprocessor-operated nerve stimulator for chronic use in conscious mice. Effectiveness of the stimulator was verified by bradycardia at stimulation frequencies above 5 Hz (3V, 1mA, 1ms pulses). Male C57Bl/6 mice (16 weeks old, standard mouse chow diet) were instrumented with nerve stimulators (3V, 1mA, 1ms pulses at 5 Hz) on the right cervical vagal nerve and body weight, food intake and metabolic rate (indirect calorimetry) were determined at baseline and weekly thereafter. After the initial post-surgical weight loss, sham animals (n=9, stimulators off) regained pre-surgical body weight within 16 days (100.0±2.7%). In contrast, mice with chronic VNS (n=12) never reestablished pre-surgical body weight (94.5±0.9% on day 16, P<0.05 vs. sham). Caloric intake was significantly reduced in mice with chronic VNS compared to sham animals (74.7±2.4 vs. 84.6±4.2 kcal/week, P<0.05). Likewise, mice with chronic VNS showed significantly reduced feeding efficiency compared to sham mice (2.6±2.0 vs. 10.6±2.4 mg body weight gain per kcal consumed). Oxygen consumption tended to be elevated (2734±152 vs. 2490±124 mL/kg/h, P=0.23) during the first week, but not thereafter. In conclusion reduced food intake and lower feeding efficiency contribute to reduced weight gain in mice with chronic VNS. We speculate that an initial increase in metabolic rate (assessed by oxygen consumption) may be antagonized by compensatory mechanisms in response to chronic VNS.

Abstract 512: Anorectic and Thermogenic Effects of Chronic Vagal Nerve Stimulation in Mice

Hypertension ◽  
2014 ◽  
Vol 64 (suppl_1) ◽  
Author(s):  
Daniel P Dias ◽  
Donald A Morgan ◽  
Harald M Stauss ◽  
Kamal Rahmouni
Keyword(s):  
Weight Loss ◽  
Body Weight ◽  
Oxygen Consumption ◽  
Weight Gain ◽  
Food Intake ◽  
Metabolic Rate ◽  
Body Weight Gain ◽  
Caloric Intake ◽  
Vagal Nerve ◽  
Feeding Efficiency

Electrical vagal nerve stimulation (VNS) has emerged as a new tool to treat human diseases including obesity. Indeed, chronic VNS has been shown to cause weight loss in humans and in experimental animal models. However, the mechanisms by which chronic VNS causes weight loss are largely unknown due in part to the unavailability of implantable nerve stimulators for mice excluding the use of genetically engineered mouse models to investigate these mechanisms. Identification such mechanisms promises to identify novel approaches for weight loss. Here, we report the development of a miniaturized microprocessor-operated nerve stimulator for chronic use in conscious mice. Effectiveness of the stimulator was verified by the bradycardia induced at stimulation frequencies above 5 Hz (3V, 1mA, 1ms pulses). Next, we used the stimulator to test whether changes in metabolic rate, caloric intake and feeding efficiency (body weight gain per calories consumed) contribute to chronic VNS-induced weight loss. Male C57Bl/6 mice (16 weeks old, on standard mouse chow diet) were instrumented with nerve stimulators (3V, 1mA, 1ms pulses at 5 Hz) on the right cervical vagal nerve and body weight, food intake and metabolic rate (indirect calorimetry) were determined at baseline and weekly thereafter. After the initial post-surgical weight loss, sham animals (n=9, stimulators off) regained pre-surgical body weight within 16 days (100.0±2.7%). In contrast, mice with chronic VNS (n=12) never re-established pre-surgical body weight (94.5±0.9% on day 16, P<0.05 vs. sham). Caloric intake was significantly reduced in mice with chronic VNS compared to sham group (74.7±2.4 vs. 84.6±4.2 kcal/week, P<0.05). Likewise, mice with chronic VNS showed significantly reduced feeding efficiency compared to sham mice (2.6±2.0 vs. 10.6±2.4 mg body weight gain per kcal consumed). Oxygen consumption tended to be elevated (2734±152 vs. 2490±124 mL/kg/h) during the first week, but not thereafter. In conclusion, reduced food intake and lower feeding efficiency contribute to VNS-induced weight loss in mice. We speculate that an initial increase in metabolic rate (assessed by oxygen consumption) may be antagonized by compensatory mechanisms triggered by chronic VNS.

scholarly journals Effect of Heat Stress on Body Weight Gain, Heterophile-Lymphocite Ratio and Body Temperature in Broiler

2016 ◽  
Vol 3 (1) ◽  
Author(s):  
Sugito S ◽  
Mira Delima
Keyword(s):  
Body Weight ◽  
Heat Stress ◽  
Weight Gain ◽  
Body Temperature ◽  
Broiler Chicken ◽  
Body Weight Gain ◽  
Conversion Ratio ◽  
Feed Conversion Ratio ◽  
Feed Conversion ◽  
Reduced Body

Increasing in ambient temperature inside the cage could lead to heat stress in broilers. This research was conducted to find out effects of heat stress on body weight gain, heterophile-lymphocite ratio and body temperature in chicken broiler. Twenty broilers aged 20 days (strain Cobb) were randomly divided into 2 groups. The first group was treated with no heat stress, the second one was caged in 33±1 0C temperature for 4 hours per day for 14 days. The results indicated that heat stress reduced body weight gain, increased body temperature, and changed behavior, but no effect on feed conversion ratio (FCR) and heterophile-lymphocyte ratio. It suggested that the heat stress caused detrimental effects on broiler chicken.

scholarly journals Body weight gain and nutrient utilization in starter pigs that are liquid-fed high-moisture corn-based diets supplemented with phytase

2010 ◽  
Vol 90 (1) ◽  
pp. 45-55 ◽  
Author(s):  
D Columbus ◽  
C L Zhu ◽  
J R Pluske ◽  
C F.M. de Lange
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Feed Intake ◽  
Crude Protein ◽  
Body Weight Gain ◽  
Carcass Composition ◽  
Phase Iii ◽  
High Moisture ◽  
P Content ◽  
High Moisture Corn

A total of 384 starter pigs were used to examine the application of exogenous phytase in high-moisture corn (HMC)-based liquid diets. Pigs were randomly assigned to 24 pens in six blocks. Pens were randomly assigned one of four HMC-based diets formulated to vary in total phosphorus (P) content (Low, Medium and High), with phytase added to only the Low P diet (Phy). Body weight gain and feed intake were monitored until body weight exceeded 20 kg. Apparent total tract digestibility of crude protein and P were measured on day 21 (Phase II) and day 42 (Phase III). At the end of the trial, two pigs from each pen were sacrificed for analysis of carcass composition and evaluation of metacarpals. Pigs fed the Phy treatment had increased digestibility of crude protein (P < 0.05) and P (P = 0.062) in Phase III, and increased metacarpal breaking strength (P < 0.01) and P content (P < 0.05). Average daily gain, feed intake, and carcass composition were not affected by treatment (P > 0.05). In conclusion, performance of starter pigs fed liquid HMC-based diets was maintained at dietary P levels below established requirements, but addition of phytase improved bone strength and mineralization. This study provides evidence for the effectiveness of phytase, and that P requirement for maximum rate of weight gain in pigs is not sufficient for maximum skeletal development.Key words: High-moisture corn, liquid feed, phosphorus, phytase, starter pigs

scholarly journals Behavioural characterisation of chronic unpredictable stress based on ethologically relevant paradigms in rats

2019 ◽  
Vol 9 (1) ◽  
Author(s):  
A. Sequeira-Cordero ◽  
A. Salas-Bastos ◽  
J. Fornaguera ◽  
J. C. Brenes
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Latent Variables ◽  
Life Stress ◽  
Early Life ◽  
Body Weight Gain ◽  
Lower Body ◽  
Chronic Unpredictable Stress ◽  
Preclinical Research ◽  
Lower Body Weight

AbstractThe chronic unpredictable stress (CUS) paradigm is extensively used in preclinical research. However, CUS exhibits translational inconsistencies, some of them resulting from the use of adult rodents, despite the evidence that vulnerability for many psychiatric disorders accumulates during early life. Here, we assessed the validity of the CUS model by including ethologically-relevant paradigms in juvenile rats. Thus, socially-isolated (SI) rats were submitted to CUS and compared with SI (experiment 1) and group-housed controls (experiment 1 and 2). We found that lower body-weight gain and hyperlocomotion, instead of sucrose consumption and preference, were the best parameters to monitor the progression of CUS, which also affected gene expression and neurotransmitter contents associated with that CUS-related phenotype. The behavioural characterisation after CUS placed locomotion and exploratory activity as the best stress predictors. By employing the exploratory factor analysis, we reduced each behavioural paradigm to few latent variables which clustered into two general domains that strongly predicted the CUS condition: (1) hyper-responsivity to novelty and mild threats, and (2) anxiety/depressive-like response. Altogether, the analyses of observable and latent variables indicate that early-life stress impairs the arousal-inhibition system leading to augmented and persistent responses towards novel, rewarding, and mildly-threatening stimuli, accompanied by lower body-weight gain.

Finishing steers on high-grain rations. Effects of type of silage, level of urea, vitamin A and cobalt supplementation on body-weight gain, feed efficiency and carcass composition

1967 ◽  
Vol 68 (1) ◽  
pp. 1-9 ◽  
Author(s):  
J. G. Morris ◽  
R. J. W. Gartner
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Vitamin A ◽  
Feed Efficiency ◽  
Body Weight Gain ◽  
Grain Sorghum ◽  
Carcass Composition ◽  
Finishing Steers ◽  
Sorghum Silage ◽  
Sorghum Grain

1. A 23 factorial with a split-plot allocation of treatments was used to investigate the effects of silage type, (sweet v. grain sorghum); level of urea, (60ν. 120 g. per head per day); vitamin A,(0ν. 40,000 i.u. per head per day), and intraruminal cobalt oxide pellet on the performance of steers fed rations of 90% sorghum grain, 10% sorghum silage.

scholarly journals Internal parasites that infected local rabbits

2021 ◽  
Vol 15 (02) ◽  
pp. 067-071
Author(s):  
Hind D Hadi
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Intestinal Parasite ◽  
Body Weight Gain ◽  
Intestinal Parasites ◽  
Parasitic Diseases ◽  
Lower Body ◽  
Lower Body Weight ◽  
Internal Parasites ◽  
Epidemic Diseases

Rabbits are animals affected by many different species of parasites, infection Lead to lower body weight gain compared with non-infected rabbits , while sever infection Lead to death , although rabbits are less likely to develop epidemic diseases, but they are exposed to diseases of care and malnutrition, as well as parasitic diseases . Turning to previous studies that dealt with the spread of internal parasites in rabbits such as (Giardia, Cryptosporidium, Eimeria sp., Cystecercus pisiformis, Passalurus ambiguous). The current study aimed to defined of intestinal parasite in rabbit. Despite, the few of research on this subject for this study of intestinal parasites that Infection of rabbits and suggestion development of a database of studies of internal parasites affecting rabbits.

tert-Butylhydroquinone reduces lipid accumulation in C57BL/6 mice with lower body weight gain

2013 ◽  
Vol 36 (7) ◽  
pp. 897-904 ◽  
Author(s):  
Kung-Woo Nam ◽  
Yong Hyun Kim ◽  
Hyun Jung Kwon ◽  
Sang-Ki Rhee ◽  
Wan-Jong Kim ◽  
...  
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Lipid Accumulation ◽  
Body Weight Gain ◽  
Lower Body ◽  
Lower Body Weight

scholarly journals Low relative resting metabolic rate and body weight gain in adult Caucasian Italians

2005 ◽  
Vol 29 (3) ◽  
pp. 287-291 ◽  
Author(s):  
S Buscemi ◽  
S Verga ◽  
G Caimi ◽  
G Cerasola
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Metabolic Rate ◽  
Body Weight Gain ◽  
Resting Metabolic Rate

Effect of prepubertal body weight gain and breed on carcass composition at puberty in beef heifers

1993 ◽  
Vol 71 (5) ◽  
pp. 1104-1111 ◽  
Author(s):  
H. W. Hopper ◽  
S. E. Williams ◽  
D. J. Byerley ◽  
M. M. Rollosson ◽  
P. O. Ahmed ◽  
...  
Keyword(s):  
Body Weight ◽  
Weight Gain ◽  
Body Weight Gain ◽  
Carcass Composition ◽  
Beef Heifers
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