scholarly journals Effect of providing light during incubation on the health, productivity, and behavior of broiler chickens

2009 ◽  
Vol 88 (1) ◽  
pp. 29-37 ◽  
Author(s):  
G.S. Archer ◽  
H.L. Shivaprasad ◽  
J.A. Mench
Keyword(s):  
Broiler Chickens ◽  
And Behavior

scholarly journals Effect of Litter on Development and Severity of Foot-Pad Dermatitis and Behavior of Broiler Chickens

2017 ◽  
Vol 19 (2) ◽  
pp. 247-254 ◽  
Author(s):  
D Zikic ◽  
M Djukic-Stojcic ◽  
S Bjedov ◽  
L Peric ◽  
S Stojanovic ◽  
...  
Keyword(s):  
Broiler Chickens ◽  
Foot Pad ◽  
And Behavior

Pose estimation and behavior classification of broiler chickens based on deep neural networks

2021 ◽  
Vol 180 ◽  
pp. 105863
Author(s):  
Cheng Fang ◽  
Tiemin Zhang ◽  
Haikun Zheng ◽  
Junduan Huang ◽  
Kaixuan Cuan
Keyword(s):  
Neural Networks ◽  
Pose Estimation ◽  
Broiler Chickens ◽  
Deep Neural Networks ◽  
And Behavior

scholarly journals A Machine Vision-Based Method for Monitoring Broiler Chicken Floor Distribution

Sensors ◽  
2020 ◽  
Vol 20 (11) ◽  
pp. 3179 ◽  
Author(s):  
Yangyang Guo ◽  
Lilong Chai ◽  
Samuel E. Aggrey ◽  
Adelumola Oladeinde ◽  
Jasmine Johnson ◽  
...  
Keyword(s):  
Machine Vision ◽  
Broiler Chickens ◽  
Broiler Chicken ◽  
Absolute Error ◽  
Distribution Analysis ◽  
Evaluation Tool ◽  
Hanging Chain ◽  
Bird Distribution ◽  
Bp Neural Network Model ◽  
And Behavior

The proper spatial distribution of chickens is an indication of a healthy flock. Routine inspections of broiler chicken floor distribution are done manually in commercial grow-out houses every day, which is labor intensive and time consuming. This task requires an efficient and automatic system that can monitor the chicken’s floor distributions. In the current study, a machine vision-based method was developed and tested in an experimental broiler house. For the new method to recognize bird distribution in the images, the pen floor was virtually defined/divided into drinking, feeding, and rest/exercise zones. As broiler chickens grew, the images collected each day were analyzed separately to avoid biases caused by changes of body weight/size over time. About 7000 chicken areas/profiles were extracted from images collected from 18 to 35 days of age to build a BP neural network model for floor distribution analysis, and another 200 images were used to validate the model. The results showed that the identification accuracies of bird distribution in the drinking and feeding zones were 0.9419 and 0.9544, respectively. The correlation coefficient (R), mean square error (MSE), and mean absolute error (MAE) of the BP model were 0.996, 0.038, and 0.178, respectively, in our analysis of broiler distribution. Missed detections were mainly caused by interference with the equipment (e.g., the feeder hanging chain and water line); studies are ongoing to address these issues. This study provides the basis for devising a real-time evaluation tool to detect broiler chicken floor distribution and behavior in commercial facilities.

Effect of different litter material on performance and behavior of broiler chickens

2010 ◽  
Vol 122 (1) ◽  
pp. 48-52 ◽  
Author(s):  
Majid Toghyani ◽  
Abasali Gheisari ◽  
Mehrdad Modaresi ◽  
Sayed Ali Tabeidian ◽  
Mehdi Toghyani
Keyword(s):  
Broiler Chickens ◽  
And Behavior

scholarly journals PSVIII-32 Late-Breaking Abstract: The effect of outdoor stocking density and weather on the behavior of broiler chickens raised in mobile shelters on pasture

2020 ◽  
Vol 98 (Supplement_4) ◽  
pp. 349-350
Author(s):  
Brad J Heins ◽  
Hannah Phillips
Keyword(s):  
Broiler Chickens ◽  
Stocking Density ◽  
Heat Index ◽  
Central Research ◽  
University Of Minnesota ◽  
Behavioral Differences ◽  
Bird Density ◽  
Hot Weather ◽  
And Behavior ◽  
The University

Abstract The aim of this study was to examine the behavior, and the relationship between weather and behavior, of broilers raised in mobile shelters with two stocking densities of pasture access. Fifty straight-run Freedom Rangers were used in three replicates (n = 150) at the University of Minnesota West Central Research and Outreach Center (Morris, MN). From 4 to 11 weeks of age, birds were housed in a mobile shelter divided into two equal-sized pens with daily access to pasture. Birds were allocated to one of the two pens corresponding to the treatment groups: 1) high (0.46 m2 per bird) and 2) low (2.5 m2 per bird) density outdoor pasture allowance. Ten focal birds per pen were randomly designated for behavior observations performed eight times weekly from 5 to 10 weeks of age. Counts of the number of birds outside were recorded during each observation. Behaviors were recorded continuously for 1-minute durations (Animal Behaviour Pro© app) on each focal bird. The means averaged for each observation were analyzed in linear mixed models with fixed (treatment), random (pen and replicate), and repeated (observation) effects. Models included age, heat index, solar radiation, and their interactions with treatment based on a backward stepwise selection. The temperature range recorded during the study was 7 to 32 ⁰C. No behavioral differences between treatments were observed. Standing decreased (P < 0.05) as heat index increased. Pasture use declined (P < 0.05) when heat index was greater than 26 ⁰C. Foraging decreased (P < 0.05) and pasture use increased (P < 0.05) as age increased. The results of this study indicate similar behaviors of broilers raised with two levels of pasture allowance and suggests that hot weather negatively affects the use of pasture space. Thus, providing shade in pasture might be a method to increasing ranging in broilers.

How Homo economicus lost her mind and how we can revive her

2018 ◽  
Vol 41 ◽  
Author(s):  
Peter DeScioli
Keyword(s):  
Economic Thought ◽  
History Of Economic Thought ◽  
Homo Economicus ◽  
Economic Theories ◽  
Target Article ◽  
History Of ◽  
The Mind ◽  
And Behavior

AbstractThe target article by Boyer & Petersen (B&P) contributes a vital message: that people have folk economic theories that shape their thoughts and behavior in the marketplace. This message is all the more important because, in the history of economic thought, Homo economicus was increasingly stripped of mental capacities. Intuitive theories can help restore the mind of Homo economicus.

The parent-offspring microbiome and neurobehavioral development

2019 ◽  
Vol 42 ◽  
Author(s):  
Jeffrey R. Alberts ◽  
Christopher Harshaw ◽  
Gregory E. Demas ◽  
Cara L. Wellman ◽  
Ardythe L. Morrow
Keyword(s):  
Mammalian Species ◽  
Social Emotional ◽  
Behavioral Measures ◽  
Neurobehavioral Development ◽  
Emotional Function ◽  
Neurobehavioral Outcomes ◽  
Methodological Approaches ◽  
And Behavior

Abstract We identify the significance and typical requirements of developmental analyses of the microbiome-gut-brain (MGB) in parents, offspring, and parent-offspring relations, which have particular importance for neurobehavioral outcomes in mammalian species, including humans. We call for a focus on behavioral measures of social-emotional function. Methodological approaches to interpreting relations between the microbiota and behavior are discussed.

TEM evaluation of graded SixGe1-x heterolayers

1991 ◽  
Vol 49 ◽  
pp. 894-895
Author(s):  
N. David Theodore ◽  
Mamoru Tomozane ◽  
Ming Liaw
Keyword(s):  
Heterojunction Bipolar Transistors ◽  
Gas Flow ◽  
Field Effect Transistors ◽  
Chemical Vapor ◽  
Dark Field ◽  
Bipolar Transistors ◽  
Structural Quality ◽  
Weak Beam ◽  
Transmission Electron ◽  
And Behavior

There is extensive interest in SiGe for use in heterojunction bipolar transistors. SiGe/Si superlattices are also of interest because of their potential for use in infrared detectors and field-effect transistors. The processing required for these materials is quite compatible with existing silicon technology. However, before SiGe can be used extensively for devices, there is a need to understand and then control the origin and behavior of defects in the materials. The present study was aimed at investigating the structural quality of, and the behavior of defects in, graded SiGe layers grown by chemical vapor deposition (CVD).The structures investigated in this study consisted of Si1-xGex[x=0.16]/Si1-xGex[x= 0.14, 0.13, 0.12, 0.10, 0.09, 0.07, 0.05, 0.04, 0.005, 0]/epi-Si/substrate heterolayers grown by CVD. The Si1-xGex layers were isochronally grown [t = 0.4 minutes per layer], with gas-flow rates being adjusted to control composition. Cross-section TEM specimens were prepared in the 110 geometry. These were then analyzed using two-beam bright-field, dark-field and weak-beam images. A JEOL JEM 200CX transmission electron microscope was used, operating at 200 kV.

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