Quick Steps to Help Manage Heat Stress in your Dairy CowsJaylor
Cows do best when the air temperature is between 5.0 C and 21.0 C. When it gets hotter than that, cows’ efforts to maintain normal body temperature become costly. Learn how to kelp keep your dairy cows cool and productive.
This presentation show about feed technology how to feed and fodder process their History, Principles, classification and some related definition its also helpful to graduate student and post graduate student FEED TECHNOLOGY
Definition
The subject of feed technology deals with processing of feeds, fodders and preparation of formula feeds for which the knowledge of nutritional requirements of various livestock and poultry, quality control of feed ingredients, feed plant management and the storage of feed ingredients and feeds are essential.
Animal feed technology may also be defined as the application of physical, chemical, biochemical, biological and engineering techniques to increase the nutrient utilization of feeds and fodders in animal system for the development of livestock and poultry and feed industry.
Beginning of feed Industry and related Activities in the US:-
• In 1875 Mr. john barwell initiated the production of a calf meal at Blatchford of Waukegan, Illinois.
• American Feed Manufacturers Association (AFMA) was founded in 1909 in Wisconsin and its name was changed to American Feed Industry Association (AFIA) in 1985.
• The Association of American Feed Control Officials (AAFCO) was established in 1909.
• Linear programming, a mathematical procedure, was developed by George B. Dantzig in 1947.
• W.V. Waugh of USDA was the first to see the potential of this mathematical procedure and developed a least cost dairy feed in 1951.
• Food and drug Administration (FDA) was passed in 1906 in USA.
*Some of the AAFCO Definitions:-
1. Complete feed: - A nutritionally adequate feed for animals other than humans and is capable of maintaining life and / or promoting production without any additional substance, except water.
2. Concentrate:- A feed used with another to improve the nutritive balance of the total and intended to be further diluted and mixed to produce a supplement or a complete feed.
3. Supplement:- A feed used with another to improve the nutritive balance or performance of the total and intended to be (1) fed undiluted as a supplement to other feeds, (2) offered free- choice with other parts of the ration separately available or (3) further diluted and mixed to produce a complete feed.
4. Premix:- A uniform mixture of one or more micro-ingredients with diluents and carrier.
Development of Feed Industry in India:-
• Feed industry came into existence in India in 1961 with the establishment of a feed plant in Ludhiana, Punjab.
• Compound Livestock Feed Manufacturers Association (CLFMA) was formed on 8 June, 1967.
•
This is an essential tool for poultry management. Lighting is the unavoidable management practice for successful poultry rearing. Present ppt prepared based on the basic rule of light required for chicken with practical aspect. I hoped students will be benefited with this presentation.
Quick Steps to Help Manage Heat Stress in your Dairy CowsJaylor
Cows do best when the air temperature is between 5.0 C and 21.0 C. When it gets hotter than that, cows’ efforts to maintain normal body temperature become costly. Learn how to kelp keep your dairy cows cool and productive.
This presentation show about feed technology how to feed and fodder process their History, Principles, classification and some related definition its also helpful to graduate student and post graduate student FEED TECHNOLOGY
Definition
The subject of feed technology deals with processing of feeds, fodders and preparation of formula feeds for which the knowledge of nutritional requirements of various livestock and poultry, quality control of feed ingredients, feed plant management and the storage of feed ingredients and feeds are essential.
Animal feed technology may also be defined as the application of physical, chemical, biochemical, biological and engineering techniques to increase the nutrient utilization of feeds and fodders in animal system for the development of livestock and poultry and feed industry.
Beginning of feed Industry and related Activities in the US:-
• In 1875 Mr. john barwell initiated the production of a calf meal at Blatchford of Waukegan, Illinois.
• American Feed Manufacturers Association (AFMA) was founded in 1909 in Wisconsin and its name was changed to American Feed Industry Association (AFIA) in 1985.
• The Association of American Feed Control Officials (AAFCO) was established in 1909.
• Linear programming, a mathematical procedure, was developed by George B. Dantzig in 1947.
• W.V. Waugh of USDA was the first to see the potential of this mathematical procedure and developed a least cost dairy feed in 1951.
• Food and drug Administration (FDA) was passed in 1906 in USA.
*Some of the AAFCO Definitions:-
1. Complete feed: - A nutritionally adequate feed for animals other than humans and is capable of maintaining life and / or promoting production without any additional substance, except water.
2. Concentrate:- A feed used with another to improve the nutritive balance of the total and intended to be further diluted and mixed to produce a supplement or a complete feed.
3. Supplement:- A feed used with another to improve the nutritive balance or performance of the total and intended to be (1) fed undiluted as a supplement to other feeds, (2) offered free- choice with other parts of the ration separately available or (3) further diluted and mixed to produce a complete feed.
4. Premix:- A uniform mixture of one or more micro-ingredients with diluents and carrier.
Development of Feed Industry in India:-
• Feed industry came into existence in India in 1961 with the establishment of a feed plant in Ludhiana, Punjab.
• Compound Livestock Feed Manufacturers Association (CLFMA) was formed on 8 June, 1967.
•
This is an essential tool for poultry management. Lighting is the unavoidable management practice for successful poultry rearing. Present ppt prepared based on the basic rule of light required for chicken with practical aspect. I hoped students will be benefited with this presentation.
Major economic traits of cattle and buffalopratee5
Selection and judging of the breeding stocks are the first and foremost steps to start with any breeding programme. For this, a no. of phenotypic and behavioral traits are taken into consideration. Breeding plans for cattle and buffalo should aim to meet the quantitative and qualitative demands of milk and meat in the country. From a practical standpoint, traits with a measurable or at least readily recognizable economic value are generally to be given the most emphasis.The economic traits are typically those that affect either the income obtained or the costs of production. So, a thorough understanding of economic traits of livestock is of utmost importance.
ICRISAT Governing Board 2019 PC meeting: Multifactorial enhancement of sorghu...ICRISAT
Sorghum is a cheap source of nutrition for ~ 500 mn people in Africa and Asia and a forage crop with potential for highest dry matter production under rainfed conditions. Using advanced breeding technologies such as TILLING and CRISPR-Cas9, we aim to develop thick aleurone trait in sorghum combining with high Fe & Zn varieties that are already available with ICRISAT to desirable multifactorial nutritional benefits.
A study was carried out to evaluate the nutritive value and enzyme supplementation of different sources of energy in broiler diets on the growth performance and heamatological parameters of broiler chickens supplemented with Mazigrain® enzyme within the treated groups. Five isonitrogenous and isocaloric diets less (23.17 % CP; 2831 Kcal/ME and 21.73 % CP; 2929 Kcal/ME) for the broiler starter (0 - a month) and finisher phases (5–8 months) respectively were formulated. Diet 1(maize based diet) served in as the control while diets 2, 3, 4 and 5 were supplemented with sorghum, pearl millet, cassava and sweet potatoes based diets separately. A sum of 225 day-old NAPRI X broiler chicks were haphazardly distributed to the five treatments. Every treatment comprised of 45 broilers with three repeats of fifteen birds each in a Completely Randomized Design (CRD). The general linear model protocol of S.A.S. 9.0. was used to analyze the collected data. Among the dietary groups significant changes (P<0.05) was found utilizing a Tukey test. Enzyme along with various energy sources have noteworthy (P<0.05) changes on every one of the parameters (final weight, daily weight gain, feed conversion ratio, water intake, water to feed ratio and feed cost per kilogram weight gain) except for death rate at the starter phase. Broilers that had sorghum based diet had the best performance at starter stage (final weight; 627 g, weight gain; 576.85 g, feed cost/kg gain; ^ 187.95 k). At the finisher stage, sorghum supplemented with enzyme had the best feed conversion ratio (1.96) and feed cost/kg gain; ^ 171.15 k. The optimal performance characteristics were recorded for sorghum based diets. Feed cost / kg gain was the cheapest on birds fed sorghum based diet with enzyme supplementation which was comparable with those fed the maize based diet. However, the use of enzyme enhanced the performance of birds at both the starter and finisher phases.
A study was carried out to evaluate the nutritive value and enzyme
supplementation of different sources of energy in broiler diets on the growth
performance and heamatological parameters of broiler chickens supplemented with
Mazigrain® enzyme within the treated groups. Five isonitrogenous and isocaloric diets
less (23.17 % CP; 2831 Kcal/ME and 21.73 % CP; 2929 Kcal/ME) for the broiler starter
(0 - a month) and finisher phases (5–8 months) respectively were formulated. Diet 1
(maize based diet) served in as the control while diets 2, 3, 4 and 5 were
supplemented with sorghum, pearl millet, cassava and sweet potatoes based diets
separately. A sum of 225 day-old NAPRI X broiler chicks were haphazardly distributed
to the five treatments. Every treatment comprised of 45 broilers with three repeats of
fifteen birds each in a Completely Randomized Design (CRD). The general linear model
protocol of S.A.S. 9.0. was used to analyze the collected data. Among the dietary
groups significant changes (P<0.05) was found utilizing a Tukey test. Enzyme along
with various energy sources have noteworthy (P<0.05) changes on every one of the
parameters (final weight, daily weight gain, feed conversion ratio, water intake, water
to feed ratio and feed cost per kilogram weight gain) except for death rate at the
starter phase. Broilers that had sorghum based diet had the best performance at
starter stage (final weight; 627 g, weight gain; 576.85 g, feed cost/kg gain; ^ 187.95 k).
At the finisher stage, sorghum supplemented with enzyme had the best feed
conversion ratio (1.96) and feed cost/kg gain; ^ 171.15 k. The optimal performance
characteristics were recorded for sorghum based diets. Feed cost / kg gain was the
cheapest on birds fed sorghum based diet with enzyme supplementation which was
comparable with those fed the maize based diet. However, the use of enzyme
enhanced the performance of birds at both the starter and finisher phases.
Were those the days? Agriculture Then and NowJohn Blue
Were those the days? Agriculture Then and Now - Dr. Alison Van Eenennaam, University of California, Davis, from the 2019 Iowa Pork Congress, January 23 - 24, 2019, Des Moines, IA, USA.
More presentations at https://www.youtube.com/channel/UCEFNbfee_Rq3AfAFTRpuCrQ
EFFECT OF ENZYME SUPPLEMENTATION ON PERFORMANCE OF PULLET CHICKS FED DIFFEREN...Gabriel Ken
A study was conducted to evaluate the performance of pullet chicks fed diets containing varying levels of fibre and supplementary enzyme. One hundred and twenty 3 -week old Harco black pullet chicks averaging 249.87 – 250.23g body weight were randomly divided into 8 groups of 15 birds each.
Effects of Probiotics Feeding Technology on Weight Gain of Indigenous Chicken...iosrjce
IOSR Journal of Agriculture and Veterinary Science (IOSR-JAVS) is a double blind peer reviewed International Journal edited by the International Organization of Scientific Research (IOSR). The journal provides a common forum where all aspects of Agricultural and Veterinary Sciences are presented. The journal invites original papers, review articles, technical reports and short communications containing new insight into any aspect Agricultural and Veterinary Sciences that are not published or not being considered for publication elsewhere.
The presentation discusses in detail the efficacy and multipurpose use of an environmentally controlled poultry house and.It basically determines the efficacy of each section of the EC poultry house.
Kerala state is having abundant water source and people are really proud of it and lavishly wastes water.But due to the uprising scarcity of good potable drinking water we should think about conserving water before polluting the sources.This presentation is a description about the water scenario in India briefly and describes about the major water pollution and the main regions that are being affected severely.
Alternative means of communication during a disaster a presentation on the various alternatives when all communication breaks down during a disaster and how social media is also helping.
THE IMPORTANCE OF MARTIAN ATMOSPHERE SAMPLE RETURN.Sérgio Sacani
The return of a sample of near-surface atmosphere from Mars would facilitate answers to several first-order science questions surrounding the formation and evolution of the planet. One of the important aspects of terrestrial planet formation in general is the role that primary atmospheres played in influencing the chemistry and structure of the planets and their antecedents. Studies of the martian atmosphere can be used to investigate the role of a primary atmosphere in its history. Atmosphere samples would also inform our understanding of the near-surface chemistry of the planet, and ultimately the prospects for life. High-precision isotopic analyses of constituent gases are needed to address these questions, requiring that the analyses are made on returned samples rather than in situ.
Cancer cell metabolism: special Reference to Lactate PathwayAADYARAJPANDEY1
Normal Cell Metabolism:
Cellular respiration describes the series of steps that cells use to break down sugar and other chemicals to get the energy we need to function.
Energy is stored in the bonds of glucose and when glucose is broken down, much of that energy is released.
Cell utilize energy in the form of ATP.
The first step of respiration is called glycolysis. In a series of steps, glycolysis breaks glucose into two smaller molecules - a chemical called pyruvate. A small amount of ATP is formed during this process.
Most healthy cells continue the breakdown in a second process, called the Kreb's cycle. The Kreb's cycle allows cells to “burn” the pyruvates made in glycolysis to get more ATP.
The last step in the breakdown of glucose is called oxidative phosphorylation (Ox-Phos).
It takes place in specialized cell structures called mitochondria. This process produces a large amount of ATP. Importantly, cells need oxygen to complete oxidative phosphorylation.
If a cell completes only glycolysis, only 2 molecules of ATP are made per glucose. However, if the cell completes the entire respiration process (glycolysis - Kreb's - oxidative phosphorylation), about 36 molecules of ATP are created, giving it much more energy to use.
IN CANCER CELL:
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
Unlike healthy cells that "burn" the entire molecule of sugar to capture a large amount of energy as ATP, cancer cells are wasteful.
Cancer cells only partially break down sugar molecules. They overuse the first step of respiration, glycolysis. They frequently do not complete the second step, oxidative phosphorylation.
This results in only 2 molecules of ATP per each glucose molecule instead of the 36 or so ATPs healthy cells gain. As a result, cancer cells need to use a lot more sugar molecules to get enough energy to survive.
introduction to WARBERG PHENOMENA:
WARBURG EFFECT Usually, cancer cells are highly glycolytic (glucose addiction) and take up more glucose than do normal cells from outside.
Otto Heinrich Warburg (; 8 October 1883 – 1 August 1970) In 1931 was awarded the Nobel Prize in Physiology for his "discovery of the nature and mode of action of the respiratory enzyme.
WARNBURG EFFECT : cancer cells under aerobic (well-oxygenated) conditions to metabolize glucose to lactate (aerobic glycolysis) is known as the Warburg effect. Warburg made the observation that tumor slices consume glucose and secrete lactate at a higher rate than normal tissues.
Introduction:
RNA interference (RNAi) or Post-Transcriptional Gene Silencing (PTGS) is an important biological process for modulating eukaryotic gene expression.
It is highly conserved process of posttranscriptional gene silencing by which double stranded RNA (dsRNA) causes sequence-specific degradation of mRNA sequences.
dsRNA-induced gene silencing (RNAi) is reported in a wide range of eukaryotes ranging from worms, insects, mammals and plants.
This process mediates resistance to both endogenous parasitic and exogenous pathogenic nucleic acids, and regulates the expression of protein-coding genes.
What are small ncRNAs?
micro RNA (miRNA)
short interfering RNA (siRNA)
Properties of small non-coding RNA:
Involved in silencing mRNA transcripts.
Called “small” because they are usually only about 21-24 nucleotides long.
Synthesized by first cutting up longer precursor sequences (like the 61nt one that Lee discovered).
Silence an mRNA by base pairing with some sequence on the mRNA.
Discovery of siRNA?
The first small RNA:
In 1993 Rosalind Lee (Victor Ambros lab) was studying a non- coding gene in C. elegans, lin-4, that was involved in silencing of another gene, lin-14, at the appropriate time in the
development of the worm C. elegans.
Two small transcripts of lin-4 (22nt and 61nt) were found to be complementary to a sequence in the 3' UTR of lin-14.
Because lin-4 encoded no protein, she deduced that it must be these transcripts that are causing the silencing by RNA-RNA interactions.
Types of RNAi ( non coding RNA)
MiRNA
Length (23-25 nt)
Trans acting
Binds with target MRNA in mismatch
Translation inhibition
Si RNA
Length 21 nt.
Cis acting
Bind with target Mrna in perfect complementary sequence
Piwi-RNA
Length ; 25 to 36 nt.
Expressed in Germ Cells
Regulates trnasposomes activity
MECHANISM OF RNAI:
First the double-stranded RNA teams up with a protein complex named Dicer, which cuts the long RNA into short pieces.
Then another protein complex called RISC (RNA-induced silencing complex) discards one of the two RNA strands.
The RISC-docked, single-stranded RNA then pairs with the homologous mRNA and destroys it.
THE RISC COMPLEX:
RISC is large(>500kD) RNA multi- protein Binding complex which triggers MRNA degradation in response to MRNA
Unwinding of double stranded Si RNA by ATP independent Helicase
Active component of RISC is Ago proteins( ENDONUCLEASE) which cleave target MRNA.
DICER: endonuclease (RNase Family III)
Argonaute: Central Component of the RNA-Induced Silencing Complex (RISC)
One strand of the dsRNA produced by Dicer is retained in the RISC complex in association with Argonaute
ARGONAUTE PROTEIN :
1.PAZ(PIWI/Argonaute/ Zwille)- Recognition of target MRNA
2.PIWI (p-element induced wimpy Testis)- breaks Phosphodiester bond of mRNA.)RNAse H activity.
MiRNA:
The Double-stranded RNAs are naturally produced in eukaryotic cells during development, and they have a key role in regulating gene expression .
Richard's aventures in two entangled wonderlandsRichard Gill
Since the loophole-free Bell experiments of 2020 and the Nobel prizes in physics of 2022, critics of Bell's work have retreated to the fortress of super-determinism. Now, super-determinism is a derogatory word - it just means "determinism". Palmer, Hance and Hossenfelder argue that quantum mechanics and determinism are not incompatible, using a sophisticated mathematical construction based on a subtle thinning of allowed states and measurements in quantum mechanics, such that what is left appears to make Bell's argument fail, without altering the empirical predictions of quantum mechanics. I think however that it is a smoke screen, and the slogan "lost in math" comes to my mind. I will discuss some other recent disproofs of Bell's theorem using the language of causality based on causal graphs. Causal thinking is also central to law and justice. I will mention surprising connections to my work on serial killer nurse cases, in particular the Dutch case of Lucia de Berk and the current UK case of Lucy Letby.
Seminar of U.V. Spectroscopy by SAMIR PANDASAMIR PANDA
Spectroscopy is a branch of science dealing the study of interaction of electromagnetic radiation with matter.
Ultraviolet-visible spectroscopy refers to absorption spectroscopy or reflect spectroscopy in the UV-VIS spectral region.
Ultraviolet-visible spectroscopy is an analytical method that can measure the amount of light received by the analyte.
Multi-source connectivity as the driver of solar wind variability in the heli...Sérgio Sacani
The ambient solar wind that flls the heliosphere originates from multiple
sources in the solar corona and is highly structured. It is often described
as high-speed, relatively homogeneous, plasma streams from coronal
holes and slow-speed, highly variable, streams whose source regions are
under debate. A key goal of ESA/NASA’s Solar Orbiter mission is to identify
solar wind sources and understand what drives the complexity seen in the
heliosphere. By combining magnetic feld modelling and spectroscopic
techniques with high-resolution observations and measurements, we show
that the solar wind variability detected in situ by Solar Orbiter in March
2022 is driven by spatio-temporal changes in the magnetic connectivity to
multiple sources in the solar atmosphere. The magnetic feld footpoints
connected to the spacecraft moved from the boundaries of a coronal hole
to one active region (12961) and then across to another region (12957). This
is refected in the in situ measurements, which show the transition from fast
to highly Alfvénic then to slow solar wind that is disrupted by the arrival of
a coronal mass ejection. Our results describe solar wind variability at 0.5 au
but are applicable to near-Earth observatories.
(May 29th, 2024) Advancements in Intravital Microscopy- Insights for Preclini...Scintica Instrumentation
Intravital microscopy (IVM) is a powerful tool utilized to study cellular behavior over time and space in vivo. Much of our understanding of cell biology has been accomplished using various in vitro and ex vivo methods; however, these studies do not necessarily reflect the natural dynamics of biological processes. Unlike traditional cell culture or fixed tissue imaging, IVM allows for the ultra-fast high-resolution imaging of cellular processes over time and space and were studied in its natural environment. Real-time visualization of biological processes in the context of an intact organism helps maintain physiological relevance and provide insights into the progression of disease, response to treatments or developmental processes.
In this webinar we give an overview of advanced applications of the IVM system in preclinical research. IVIM technology is a provider of all-in-one intravital microscopy systems and solutions optimized for in vivo imaging of live animal models at sub-micron resolution. The system’s unique features and user-friendly software enables researchers to probe fast dynamic biological processes such as immune cell tracking, cell-cell interaction as well as vascularization and tumor metastasis with exceptional detail. This webinar will also give an overview of IVM being utilized in drug development, offering a view into the intricate interaction between drugs/nanoparticles and tissues in vivo and allows for the evaluation of therapeutic intervention in a variety of tissues and organs. This interdisciplinary collaboration continues to drive the advancements of novel therapeutic strategies.
Nutraceutical market, scope and growth: Herbal drug technologyLokesh Patil
As consumer awareness of health and wellness rises, the nutraceutical market—which includes goods like functional meals, drinks, and dietary supplements that provide health advantages beyond basic nutrition—is growing significantly. As healthcare expenses rise, the population ages, and people want natural and preventative health solutions more and more, this industry is increasing quickly. Further driving market expansion are product formulation innovations and the use of cutting-edge technology for customized nutrition. With its worldwide reach, the nutraceutical industry is expected to keep growing and provide significant chances for research and investment in a number of categories, including vitamins, minerals, probiotics, and herbal supplements.
2. INTRODUCTION
The objective of the broiler manager should be to achieve the required
flock performance in terms of live weight, feed conversion, uniformity
and meat yield.
Feed is a major component of the total cost of broiler production
To support optimum performance, broiler rations should be formulated
to give the correct balance of energy, protein and amino acids, minerals,
vitamins and essential fatty acids.
During the rearing period, the feeding program should be designed to
achieve uniform bird growth and synchronization of sexual maturity.
Full utilisation of the genetic potential available in the bird for FCR,
growth rate and meat yield.
3. SEX SEPARATE REARING
Increase in technical efficiency and use of new strategies at the farm
are two important components in maximizing the margin.
Sex-separate feeding and maintaining optimum grow-out period of
birds are two strategies that farmers can easily apply to increase the
profitability of the farm.
The sexual difference of the birds has made a big difference in
physiological requirements and also nutrient requirements.
The FCR of female broilers is usually higher (less efficient) than that
of male birds of the same age, above 30 days or so as the female
birds tend to deposit proportionally more fat in the body
4. SEX-SEPARATE REARING OF
BROILERS
The growth rate, floor space and the nutrient requirements of male
and female broilers are not the same.
The males grow faster than females,
Males need higher floor space and nutrients than female broilers.
Separate diets are provided for males and females.
Male broilers require more protein, whereas the females require
less energy and less protein.
Due to these reasons, male and female broiler chicks are reared
separately, in many countries, from day-old to disposal.
5. SEPARATE-SEX GROWING
The number of birds which achieve live weight at, or close to, the flock
mean can be predicted from the CV% of that flock.
The variability of a population (the flock) is described by the coefficient
of variation (CV%) which is the standard deviation of the population
expressed as a percentage of the mean.
Variable flocks will have a high CV%, uniform flocks a lower one.
It follows that improvements in uniformity can be attained by growing
flocks in single-sex populations from placement.
6. ADVANTAGES
Separate-sex growing can be best exploited when males and
females are housed separately.
Both sexes can be managed more efficiently with regard to feeding,
lighting and stocking density.
Males grow faster, are more feed efficient and have less carcase fat
than females.
7. FEEDING PROGRAMME
A different programme can be employed for the different sexes.
The most practical method is to use the same feeds for both sexes,
but to introduce the Finisher feed earlier for females (i.e. before 25
days of age).
It is recommended that the amount or duration of Starter feed be
kept the same to ensure proper early development.
8. REARING SEX SEPARATE
Advantages
Male gain same weight 4 days before females
FCR of male is near about 1.73 while that of female is 1.89
9. SEX SEPARATED BROILERS
Advantages
To meet market demands in a better way
Sex separated birds have uniformity in weight so ease in processing.
10. Males grow more quickly and efficiently specially to the larger weight.
10
0
500
1000
1500
2000
2500
3000
0 1 2 3 4 5 6
male
female
11. ADVANTAGES
More uniform body weight of flocks can be produced by separate rearing of
sexes.
Specialized market requirement can be met. The females can be reared,
dressed and sold as whole chicken; whereas the male carcasses will be
exclusively used for deboning and various cut-up parts.
More accurate feeding to meet out the specific requirement of each sex will
be possible. This will lead to better growth rate and feed efficiency.
Due to flock uniformity, the automatic processing equipment's can be
adjusted more accurately for greater processing efficiency and minimum
condemnations.
Minimise the incidence of cannibalism and peck order, due to more flock
uniformity
12. DISADVANTAGES
Increased costs of sexing.
Larger breeding flocks are necessary to meet the demand for male
and female broiler chicks.
In turn, hatcheries may require that their customers always purchase
equal number of male and female chicks.
13. RESEARCH
ARTICLES
Nir, I., 1992male broilers have less abdominal fat compared to
females
Leenstra and Cahaner, 1992 The male broilers had a significantly
higher meat yield in the choice cuts compared to the females. Female
broiler chicks are fast feathering and have longer primaries than
coverts. Male broiler chicks are slow feathering, and the primaries are
shorter (or are of the same length) than the coverts.
Leenstra and Cahaner (1992) that the male broilers had a
significantly higher meat yield compared to the females.
14. Creswell, 2007 The nutrient requirements of males and females are
different due to the faster growth and higher meat yield of males and
there is a possibility of feeding lower levels of protein or amino acids
to the females.
Creswell, 2007 As a result of this genetic improvement, today’s
broiler is gaining an average of 50 g per day under conditions
existing in developed countries, but it is estimated that the same
broiler has the potential to double this performance.
Kleyn 2002 pointed out that a 38-day cycle length with an 11-day
cleanout would lead to an extra harvest per year compared to the
traditional practice of 42-day cycles with 14-day intervals.
15. REFERENCES
Leenstra F, and A Cahaner (1992): Effects of low and high temperature on
slaughter yield of broilers from lines selected for high weight gain,
favourable feed conversion and high or low fat content. Poultry Science 71,
1994–2006.
Austic Richard E, MC Nesheim (1990): Poultry Production, Lea & Febiger,
Chicago, USA.
Nir I (1992): Optimization of poultry diets in hot climates. Proceedings of
the 19th World’s Poultry Congress, Vol. 2, pp. 71–76.
Creswell, D. (2005). The nutritional requirements of today's broiler. Asian
Poultry Magazin May 2005, 18-21.
Creswell, D. (2007). Feeding the broiler. Asian Poultry Magazine, July 2007,
20-23.
Kleyn, R. (2002). Strategies for managing expensive feed on farm. [on line].
[Accessed on 08.03.2009]. Available at