Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Testing a Claim about Mean: Known Population SD

Testing a Claim about Mean: Known Population SD

A complete procedure of testing the hypothesis about a population mean is explained here.
Estimating a population mean requires the samples to be distributed normally. The data should be collected from the randomly selected samples having no sampling bias. The sample size needed to be higher than 30, and most importantly, the population standard deviation should be already known.
In most realistic situations, the population standard deviation is often unknown, but in rare circumstances, when it...

Background and Environment Affect Phenotype

Background and Environment Affect Phenotype

Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Skin Attachment Model for Improved Laboratory Evaluation of Potential Carcass Disinfectants for their Efficacy Against Salmonella Attached to Broiler Skin.

Journal of food protection·2019

Same author

Recovery of Salmonellae from Chilled Broiler Carcasses as Affected by Rinse Media and Enumeration Method.

Journal of food protection·2019

Same author

Influence of Feeding and Fasting Broilers Prior to Marketing on Cecal Access of Orally Administered Salmonella <sup>1</sup>.

Journal of food protection·2019

Same author

Effects of reduced digestible lysine density on myopathies of the Pectoralis major muscles in broiler chickens at 48 and 62 days of age.

Poultry science·2018

Same author

Effects of quantitative nutrient allocation on myopathies of the Pectoralis major muscles in broiler chickens at 32, 43, and 50 days of age.

Poultry science·2018

Same author

Effects of reduced dietary energy and amino acid density on Pectoralis major myopathies in broiler chickens at 36 and 49 days of age1.

Poultry science·2018

Search research articles

Related Experiment Video

Updated: Jul 5, 2026

An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research

An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research

Published on: February 2, 2022

Effect of light intensity on live performance and processing characteristics of broilers.

R J Lien¹, J B Hess, S R McKee

¹Department of Poultry Science, Auburn University, Auburn, AL 36849-5416, USA. lienrog@auburn.edu

Poultry Science

|April 19, 2008

Summary

Lower light intensity (0.1 footcandles) in broiler chickens significantly increased body weight and feed consumption. This dim light strategy improved growth performance and carcass part weights without negatively impacting feed conversion or mortality.

More Related Videos

High Throughput Assay to Examine Egg-Laying Preferences of Individual Drosophila melanogaster

High Throughput Assay to Examine Egg-Laying Preferences of Individual Drosophila melanogaster

Published on: March 24, 2016

In Ovo Feeding of Commercial Broiler Eggs: An Accurate and Reproducible Method to Affect Muscle Development and Growth

In Ovo Feeding of Commercial Broiler Eggs: An Accurate and Reproducible Method to Affect Muscle Development and Growth

Published on: September 20, 2021

Related Experiment Videos

Last Updated: Jul 5, 2026

An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research

An Experimental Approach to Investigating Effects of Artificial Light at Night on Free-Ranging Animals: Implementation, Results, and Directions for Future Research

Published on: February 2, 2022

High Throughput Assay to Examine Egg-Laying Preferences of Individual Drosophila melanogaster

High Throughput Assay to Examine Egg-Laying Preferences of Individual Drosophila melanogaster

Published on: March 24, 2016

In Ovo Feeding of Commercial Broiler Eggs: An Accurate and Reproducible Method to Affect Muscle Development and Growth

In Ovo Feeding of Commercial Broiler Eggs: An Accurate and Reproducible Method to Affect Muscle Development and Growth

Published on: September 20, 2021

Area of Science:

Animal Science
Poultry Science
Agricultural Engineering

Background:

Optimizing broiler chicken growth and carcass yield is crucial for the poultry industry.
Light intensity and photoperiod programs are known to influence avian physiology and performance.
Understanding the impact of varying light intensities under controlled photoperiods is essential for efficient broiler production.

Purpose of the Study:

To investigate the effects of different light intensities (15 footcandles vs. 0.1 footcandles) on broiler live performance.
To evaluate the impact of these light intensities on broiler carcass characteristics and yields.
To determine the efficacy of an increasing photoperiod program in conjunction with varying light intensities.

Main Methods:

1,080 male broiler chickens were housed in 12 rooms under two light intensity treatments: Bright (15 FC) and Dim (0.5 FC for 1-9 days, then 0.1 FC for 9-51 days).
Both treatments utilized an identical increasing photoperiod program from 1 to 51 days of age.
Live performance (body weight, feed consumption, mortality) and carcass processing characteristics (weights and yields of various parts) were measured.

Main Results:

Broilers under the Dim light intensity treatment exhibited significantly greater body weight (4.7%) and feed consumption (3.9%) at 51 days.
Light intensity did not influence feed conversion, mortality rates, or body weight uniformity.
The Dim treatment resulted in proportionally greater weights of lean carcass, breast, fillets, tenders, and legs, with increased wing weight (9.9%) and reduced fat pad yield.

Conclusions:

Providing lower light intensity (0.1 FC) via an increasing photoperiod program proportionally increases broiler body weight and feed consumption.
This lighting strategy enhances the weights of most carcass parts, with only minor impacts on overall yields.
Dim light intensity offers a viable method to improve broiler growth performance and specific carcass part development.