APPROXIMATION OF GROWTH INDICATORS AND ANALYSIS OF INDIVIDUAL GROWTH CURVES BY LINEAR DIMENSIONS OF TUBULAR BONES IN CHICKENS OF MEAT PRODUCTION DIRECTION DURING POSTNATAL PERIOD OF ONTOGENESIS

2021 ◽  
Vol 12 (4) ◽  
Author(s):  
S. A. Tkachuk ◽  
◽  
O. S. Pasnichenko ◽  
L. B. Savchuk ◽  
◽  
...  
Keyword(s):  
Growth Model ◽  
Broiler Chickens ◽  
Growth Models ◽  
Growth Curves ◽  
Growth Dynamics ◽  
Postnatal Period ◽  
The Body ◽  
Meat Production ◽  
Broiler Flock ◽  
Tubular Bones

Medical and biological sciences, including morphology, now require the introduction of the latest information technologies and mathematical methods to process the obtained and accumulated research results. To study the growth dynamics of body weight in domestic birds, classical growth models, Gompertz, were used for the purpose of quantitative description of the growth processes in biological objects, in particular for the growth and development of birds – Von Bertalanffy, Richards, and hyperbolastic models. The research material was tubular bones of the thoracic (humerus, ulna, and radius) and pelvic (femur, tibia, and tarsometatarsus) limbs in birds of meat production (broiler chickens and laying hens from the parent broiler flock of Cobb-500 strain) of different age groups during the postnatal period of ontogenesis. An appropriate regression analysis of experimental data based on known growth models was performed to solve the goal of obtaining growth curves and identifying special points (extremes, inflections, etc.), to build a picture of the overall development of the body as a whole and individual bones of the extremities. The most biologically suitable growth models for describing the growth dynamics of the body as a whole and individual studied bones were determined. The absence of a unified growth model of linear parameters of different tubular bones in meat producing chickens during the postnatal period of ontogenesis was established. This implies the need for a clear selection of growth models taking into account age, species, breed, keeping and feeding conditions of domestic birds. The growth model that best describes the body weight dynamics of broiler chickens is the hyperbolastic growth model of the H3 type, and in laying hens from the parent broiler flock – the Brody growth model.

The use of acidifying agents Aquasafe and Veleguard when rearing of broiler chickens

2020 ◽  
pp. 16-27
Author(s):  
L. Gamko ◽  
T. Tarinskaya
Keyword(s):  
Drinking Water ◽  
Organic Acids ◽  
Broiler Chickens ◽  
Positive Impact ◽  
The Body ◽  
Metabolic Energy ◽  
Control Group ◽  
Meat Production ◽  
Feed Conversion ◽  
Broiler Meat

It is known that necessary to replace the components of organic acids, which are part of acidifiers when drinking water to poultry in order to prevent the adaptation of microbes in the gastrointestinal tract. In the poultry industry organic acids are widely used, which are used as acidifiers to preserve the properties of water consumed. The purpose of this work was to evaluate the efficiency of broiler meat production when using acidifying agents of drinking water Aquasafe and Veleguard. The experimental part of the work has been performed in JSC “Kurinoe Tsarstvo-Bryansk” broiler area “Roshcha” in the Pochepsky district. The object of research was the livestock of broiler chickens cross Cobb 500 at floor housing. The effect of water acidifiers on meat productivity has been studied. Groups of chickens have been formed on the principle of pairs-analogues. Broiler chickens of experimental groups have been separated from the main livestock by a grid in the corner of the room for 100 heads in each group. It has been found by a result of research to be optimal dose usage of acidifying agents water Aquasafe and Veleguard to drink to broiler chickens. The positive effect of these acidifiers on the digestion of crude protein, crude fat, crude fiber, contributing to the effective use of nitrogen, which led to an increase in the intensity of growth, young animals’ livability and improved feed conversion. Slaughter yield in the control group was 55,1 %, and in the experimental group 57,2 and 58,4 %, which was by 2,1 and 3,3 % higher with the same level of metabolic energy and nutrients. In chickens that consumed acidifi ers more intensively used nutrients feed for deposition in the body of the components of the carcass, which affected the production. A positive impact of acidifying agents Aquasafe and Veleguard on meat quality in broiler chickens has been found.

scholarly journals Efficacy of manganese pantothenate and lysinate chelates for prevention of perosis in broiler chickens

2021 ◽  
Vol 12 (2) ◽  
pp. 289-293
Author(s):  
V. S. Sakara ◽  
A. Y. Melnyk ◽  
V. V. Sakhniuk ◽  
N. V. Vovkotrub ◽  
M. M. Fedorchenko ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Protein Concentration ◽  
Mineral Metabolism ◽  
The Body ◽  
Clinical State ◽  
Control Group ◽  
Meat Production ◽  
Standard Diet ◽  
Meat Productivity ◽  
Reduced Mobility

Perosis is a common metabolic disease of industrial birds, especially broiler chickens. It leads to a violation of the balance of biotic substances in the body of chickens, which is clinically manifested by the curvature of the limbs, reduced mobility, and, consequently, reduced profitability of meat production. Prevention of perosis is possible provided that chickens receive a sufficient amount of manganese in a biologically available form. Studies were conducted to determine the efficiency of use of manganese chelates (pantothenate and lysinate) for prevention of perosis in broiler chickens. Efficacy was confirmed by examining changes in the clinical state, indicators of protein and mineral metabolism, as well as meat productivity of birds. For the experiment, broiler chickens of the Cobb-500 cross were taken at the age of 14 days. The birds of the control group received a standard diet, and the chickens from two experimental groups additionally received manganese pantothenate and lysinate with water during the critical period for the development of perosis – 14–28 days old. After 14 days of administration of manganese pantothenate and lysinate, the weight of the experimental birds at the age of 28 days was greater by 133.6 g (+11.0%) and 142.2 g (+11.7%), respectively, in comparison with poultry of the control group. Additional provision of manganese pantothenate and lysinate to chickens of the experimental groups contributed to an increase in the blood serum total protein concentration by 11.0% and 12.8 %, albumin – by 10.1% and 8.2%, magnesium – by 8.1% and 9.0% and manganese – by 29.6% and 26.9%, respectively, compared with indicies of the control group birds. The use of manganese chelates in the form of pantothenate (0.2 mL/L of water) and a lysinate (0.5 mL/L) during the 14–28th days of broiler chickens’ rearing provides 100% prevention of perosis. This reduces the death of broiler chickens, increases body weight, and, as a result, significantly increases the profitability of meat production.

scholarly journals Influence of cerium dioxide nanoparticles on biochemical indicators in the organism of broiler chicken

2020 ◽  
pp. 117-120
Author(s):  
O. S. Tsekhmistrenko ◽  
◽  
V. S. Bityutskyy ◽  
S. I. Tsekhmistrenko ◽  
M. Y. Spivak ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Cerium Dioxide ◽  
High Capacity ◽  
Blood Parameters ◽  
The Body ◽  
Meat Production ◽  
Blood Profile ◽  
Leading Role ◽  
Group 2 ◽  
Poultry Farming

At present, nanotechnology is taking the leading role in various industries, medicine, and agriculture all over the world. Fundamentally different properties are inherent in nanoparticles, in particular, a high capacity for accumulation in living organisms by overcoming biobarriers, increasing bioavailability and binding with the main components of cells. The article studies the peculiarities of the influence of cerium dioxide nanoparticles on metabolic pathways in the body of broiler chickens. The data on the use of metal nanoparticles, in particular, a material based on cerium, as an alternative to feed antibiotics for increasing the productivity of livestock and poultry farming has been analyzed. The aim of this work was to investigate the effect of cerium dioxide nanoparticles on the biochemical blood profile of chickens with meat production. For the studies carried out at the Research Institute of Ecology and Biotechnology of the Bila Tserkva NAU, a new multifunctional antioxidant was used - nanodispersed cerium dioxide, developed by the D. K. Zabolotny Institute of Microbiology and Virology of the NASU, Ukraine. For the scientific and economic experience there were formed 3 groups of broilers of the ROSS 308 cross according to the principle of analogous groups (control and 2 experimental groups, 100 heads each). For 58 days, the experimental groups of birds with drinking water were added nanodispersed cerium dioxide at a dose of 8.6 mg/l during the first 14 days. Course was repeated after 7 (group 1) and 14 days (group 2) breaks. As a result of the studies, it was found that the blood parameters of broilers, characterizing the main types of metabolism were within the physiological norm. There was a tendency to activation of lipid and protein metabolism, which contributed to the intensification of the growth of young animals. The use of nanodispersed cerium dioxide as a promising material for increasing the productivity of poultry farming and as an alternative to feed antibiotics is argued. In further studies, it is advisable to study the action of cerium dioxide nanoparticles to study all possible mechanisms of its biological activity.

scholarly journals EFFICIENCY OF BROILER-CHICKENS CULTIVATION AT INCLUSION OF “BISFENOL-5” ANTIOXIDANT IN THE RATION

2018 ◽  
Vol 12 (4) ◽  
pp. 106-109
Author(s):  
Валентин Шилов ◽  
Valentin Shilov ◽  
Гузалия Хакимова ◽  
Guzaliya Hakimova ◽  
Ольга Семина ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Live Weight ◽  
The Body ◽  
Poultry Meat ◽  
Meat Production ◽  
Main Task ◽  
Poultry Production ◽  
Feed Conversion ◽  
Short Period ◽  
The Cost

The main task in meat poultry production is to obtain products in a short period of fattening with the minimum feed costs. In economic terms, fodders occupy the largest share in the cost structure of poultry meat. The feed in its composition and properties should satisfy the physiological needs of the chicken, as much as possible, and this, in turn, directly depends on its usefulness and quality. In this regard, the actual issue of feeding is the use of antioxidants to improve the conservation of feed and optimize metabolism in the body of the bird. The inclusion of “Bisfenol-5” antioxidant in full-feed mixed doses in doses of 0.002-0.015% of the feed weight positively affected the growth rate of broiler chickens and feed conversion. The highest effect was obtained with the addition of “Bisfenol-5” in the amount of 0.008% to the compound feed. The use of antioxidant-enriched mixed fodder for growing chicken broilers allowed to increase meat production to 17.5%, to increase feed conversion to 12.1%, to reduce the cost of 1 kg of live weight gain to 6.99 rubles and to improve the efficiency index to 0.2 points.

scholarly journals Growth modelling of non-functioning pituitary adenomas in patients referred for surgery

2008 ◽  
Vol 158 (3) ◽  
pp. 287-294 ◽  
Author(s):  
Juergen Honegger ◽  
Sanna Zimmermann ◽  
Tsambika Psaras ◽  
Manfred Petrick ◽  
Michel Mittelbronn ◽  
...  
Keyword(s):  
Growth Model ◽  
Growth Kinetics ◽  
Exponential Growth ◽  
Pituitary Adenomas ◽  
Growth Models ◽  
Growth Dynamics ◽  
Magnetic Resonance Images ◽  
Recurrence Rates ◽  
Observation Period ◽  
Non Functioning Pituitary Adenomas

ObjectiveRecent observational studies have established progression and recurrence rates of pituitary adenomas. However, it is still unknown how individual pituitary adenomas grow over years and whether growth kinetics follow a distinct growth model. The objective of this study was to define a growth model for non-functioning pituitary adenomas.MethodsFifteen patients who had five or more serial high-quality examinations with magnetic resonance images or computerized tomography scans were identified among 216 patients with non-functioning pituitary adenomas. Tumour volumes were assessed using a stereological method based on the Cavalieri principle. Tumour growth during the observation period was analysed and different growth models were fitted to the data.ResultsFifteen pituitary adenomas (12 recurrent tumours and 3 newly diagnosed tumours) were longitudinally observed during a median observation period of 7.4 years (range: 2.3–11.9 years). Growth kinetics could be described either by an exponential growth model (nine patients) or by a logistic model (five patients) with initial exponential growth followed by deceleration of growth. One tumour remained unchanged in size during the observation period. None of the adenomas showed accelerated growth during the observation period. Overall, the linear growth model was not suitable to describe the growth kinetics of non-functioning pituitary adenomas.ConclusionsOur study shows that growth of pituitary adenomas can be described by distinct growth models. Knowledge of growth dynamics has implications for clinical practice and helps to adjust scanning protocols for follow-up investigations.

scholarly journals Predictive Monitoring of Shake Flask Cultures with Online Estimated Growth Models

2021 ◽  
Vol 8 (11) ◽  
pp. 177
Author(s):  
Barbara Pretzner ◽  
Rüdiger W. Maschke ◽  
Claudia Haiderer ◽  
Gernot T. John ◽  
Christoph Herwig ◽  
...  
Keyword(s):  
Growth Model ◽  
Shake Flask ◽  
Growth Models ◽  
Early Stage ◽  
Growth Dynamics ◽  
Growth Conditions ◽  
Logistic Growth ◽  
Model Parameters ◽  
Time Varying ◽  
Strain Characterization

Simplicity renders shake flasks ideal for strain selection and substrate optimization in biotechnology. Uncertainty during initial experiments may, however, cause adverse growth conditions and mislead conclusions. Using growth models for online predictions of future biomass (BM) and the arrival of critical events like low dissolved oxygen (DO) levels or when to harvest is hence important to optimize protocols. Established knowledge that unfavorable metabolites of growing microorganisms interfere with the substrate suggests that growth dynamics and, as a consequence, the growth model parameters may vary in the course of an experiment. Predictive monitoring of shake flask cultures will therefore benefit from estimating growth model parameters in an online and adaptive manner. This paper evaluates a newly developed particle filter (PF) which is specifically tailored to the requirements of biotechnological shake flask experiments. By combining stationary accuracy with fast adaptation to change the proposed PF estimates time-varying growth model parameters from iteratively measured BM and DO sensor signals in an optimal manner. Such proposition of inferring time varying parameters of Gompertz and Logistic growth models is to our best knowledge novel and here for the first time assessed for predictive monitoring of Escherichia. coli (E. coli) shake flask experiments. Assessments that mimic real-time predictions of BM and DO levels under previously untested growth conditions demonstrate the efficacy of the approach. After allowing for an initialization phase where the PF learns appropriate model parameters, we obtain accurate predictions of future BM and DO levels and important temporal characteristics like when to harvest. Statically parameterized growth models that represent the dynamics of a specific setting will in general provide poor characterizations of the dynamics when we change strain or substrate. The proposed approach is thus an important innovation for scientists working on strain characterization and substrate optimization as providing accurate forecasts will improve reproducibility and efficiency in early-stage bioprocess development.

Effects of some factors on growth of lambs and the determination of growth curve models

2018 ◽  
Author(s):  
Ayhan Yilmaz ◽  
Ferda Karakus ◽  
Mehmet Bingöl ◽  
Baris Kaki ◽  
Gazel Ser
Keyword(s):  
Body Weight ◽  
Growth Curve ◽  
Growth Models ◽  
Age Groups ◽  
Growth Curves ◽  
The Body ◽  
Least Square ◽  
Coefficient Of Determination ◽  
Male And Female ◽  
Growth Curve Models

he aims were to identify the body weight of the several age groups in Norduz lambs and its correlations between these traits were to determine the best non-linear growth curve models for the growth performance of the Norduz sheep breed. A total of 91 male and female of Norduz lambs were evaluated under extensive system conditions. The least square means for weights at birth and at 15, 30, 45, 60, 75, 90, 105, 120, 135, 150, 165, 180, 195 and 210 days of age periods were 4.51±0.56, 9.28±0.25, 11.14±0.29, 14.99±0.37, 18.21±0.43, 22.54±0.54, 22.33±0.25, 23.59±0.54, 25.58±0.55, 28.07±0.58, 29.45±0.60, 29.98±0.84, 32.44±0.61, 32.03±0.59 and 31.45±0.57 kg, respectively. There were differences in favor of lambs of four-year old dams at 15 days of age and also lambs born single at 90 days of age for the body weight. The effect of weight of dam at birth, 30, 45, 60 days of age was significant (P less than 0.05-P less than 0.01) and the birth weight in lambs importantly effected the weights at 15, 30, and 45 days of age. All correlations between the body weights of several age periods were significant as statistical (P less than 0.01). As for the growth models, distinguished models were compared using the coefficient of determination and mean square error for both sexes. As a result, we concluded that von Bertalanffy model were the best model in comparison with the other models for biological growth curves in Norduz male and female lambs.

Cross-Validation for the Uncertain Chapman-Richards Growth Model with Imprecise Observations

2020 ◽  
Vol 28 (05) ◽  
pp. 769-783 ◽  
Author(s):  
Zhe Liu ◽  
Lifen Jia
Keyword(s):  
Growth Model ◽  
Regression Models ◽  
Cross Validation ◽  
Growth Models ◽  
Growth Curves ◽  
Unknown Parameters ◽  
Model Selection Method ◽  
Least Squares Estimates ◽  
Imprecise Observations ◽  
Richards Growth Model

Regression analysis estimates the relationships among variables which has been widely used in growth curves, and cross-validation as a model selection method assesses the generalization ability of regression models. Classical methods assume that the observation values of variables are precise numbers while in many cases data are imprecisely collected. So this paper explores the Chapman-Richards growth model which is one of the widely used growth models with imprecise observations under the framework of uncertainty theory. The least squares estimates of unknown parameters in this model are given. Moreover, cross-validation with imprecise observations is proposed. Furthermore, estimates of the expected value and variance of the uncertain error using residuals are given. In addition, ways to predict the value of response variable with new observed values of predictor variables are discussed. Finally, a numerical example illustrates our approach.

Growth dynamics of young mink of the albino-pastel breed in postnatal ontogeny

2021 ◽  
Vol 1 (4) ◽  
pp. 56-62
Author(s):  
O. I. Fedorova ◽  
◽  
E. A. Orlova ◽  
I. D. Antonova ◽  
◽  
...  
Keyword(s):  
Body Weight ◽  
Body Size ◽  
Sexual Dimorphism ◽  
Growth Dynamics ◽  
Postnatal Period ◽  
The Body ◽  
Postnatal Ontogeny ◽  
Hair Colour ◽  
Males And Females ◽  
Further Development

Coloured minks are widespread – more than 200 colour variations in hair colour are known. Currently, breeding in fur farming continues. One of the most recent breeding achievements is the albino pastel mink. An important characteristic of the new breed is the body size and growth of the organism during the postnatal period, which does not occur evenly but goes through certain phases. In different periods of growth, the organism requires appropriate conditions, in the presence of which further development occurs. As a result of studies of mink growth from birth to adulthood, data necessary for the correct organization of measures for rearing and feeding the animals are accumulated. When analysing the growth dynamics of young animals, it has been established that sexual dimorphism in body weight of males and females of the albino-pastel genotype is absent at one day of age. The most intensive increase in body weight in female and male albino-pastel minks occurs from day 50 to day 80. The increase in body weight continues after 3–4 months of life, with males more intense than females.

scholarly journals A growth model to predict body weight and body composition of broilers

2018 ◽  
pp. 17-24
Author(s):  
Galyna Dukhta ◽  
Jaap Van Milgen ◽  
György Kövér ◽  
Veronika Halas
Keyword(s):  
Body Weight ◽  
Growth Model ◽  
Feed Intake ◽  
Growth Models ◽  
Chemical Constituents ◽  
The Body ◽  
Feed Conversion ◽  
Livestock Farming ◽  
Protein Deposition ◽  
Nutrient Partitioning

Models predicting the nutrient partitioning and animal performance have been developed for decades. Nowadays, growth models are used in practical animal nutrition, and they have particular importance in precision livestock farming. The aim of the present study was to introduce a broiler model and to provide examples on model application. The model predicts protein and fat deposition as well as the body weight of an individual broiler chicken from digestible nutrient intake over time. Feed intake (FI) and the digestible nutrient content of the feed are inputs as well as some animal factors like: initial BW, feed intake at 1 and 2 kg of BW, precocity and mean protein deposition. The protein and energy metabolism is represented as in the classical nutrient partitioning models. The protein deposition (PD) is driven by digestible amino acid supply and is under “genetic control”, the so-called potential PD limits the actual PD if protein is oversupplied. The authors discuss how the model can be used to simulate the animal response upon different scenarios. Examples are given to show that the diet might be limiting if some animal trait is changed. Applicability of the model has shown through running the model by using different feed strategies (three- vs five-phase-feeding) and variations with animal factors. In conclusion, growth models are useful tools to support decision making for defining the most suitable feeds used in a broiler farm. The model presented in this paper shows a high sensibility and flexibility to test different scenarios. By challenging the model with different inputs, the animal response in terms of changes in body weight and feed conversion can be understood more by studying the shift in deposition of chemical constituents. The examples provided in the present paper shows the benefit of using mathematical models and their applicability in precision nutrition. It can be concluded that the growth model helps to apply “from desired feed to desired food” concept.

Sign in / Sign up

Export Citation Format

Share Document