Photogrammetry: a Non-Invasive and Objective Method for Detecting Locomotion Problems in Broiler Chickens
| Autor: | MG Morello, DV Bonamigo, Angélica Signor Mendes, SJ Paixão, Rar Ponzoni, RR Sikorski |
|---|---|
| Jazyk: | angličtina |
| Předmět: |
medicine.medical_specialty
040301 veterinary sciences animal welfare 0403 veterinary science femoral degeneration Gait (human) Physical medicine and rehabilitation Farm level Animal welfare lcsh:Zoology medicine lcsh:QL1-991 lcsh:SF1-1100 lcsh:Veterinary medicine Tibial dyschondroplasia business.industry tibial dyschondroplasia Non invasive 0402 animal and dairy science Broiler food and beverages Objective method 04 agricultural and veterinary sciences Poultry production 040201 dairy & animal science Surgery Photogrammetry lcsh:SF600-1100 Animal Science and Zoology lcsh:Animal culture business |
| Zdroj: | Brazilian Journal of Poultry Science, Vol 18, Iss 4, Pp 573-580 |
| ISSN: | 1806-9061 |
| Popis: | Locomotion problems in broiler chickens can cause economic losses of up to 40% of the total revenues due to carcass condemnation and downgrading at processing. Leg disorders, such as femoral lesions, tibial dyschondroplasia, and spondylolisthesis, substantially impact the welfare of chickens as these disorders can prevent birds from reaching the feeders and drinkers, thus reducing feed and water intake. The most important issues related to broiler welfare reported in the last two decades are their growing sensitivity to metabolic and locomotion problems due to the fast growth rates and inactivity. Traditional methods for the determination of gait score include the manual scoring of animal behavior in the broiler house. Recorded video images can also be used for manual scoring of chicken gait score. However, scoring of some animal-based information by human experts and manual methods remain difficult, time consuming and expensive when implemented at farm level. In an effort to objectively detect leg disorders, this study aimed at validating the photogrammetry technique as a non-invasive method for identifying locomotion problems in broilers. Photogrammetry allows determining the geometric properties of broilers from digital photos that are processed and analyzed using a computer software. Results obtained using photogrammetry were tested for their correlation with those obtained by accepted methodologies, including gait score and macroscopic examination of femoral degeneration and tibial dyschondroplasia. The photogrammetry results agreed with the results of the afore mentioned accepted methods. |
| Databáze: | OpenAIRE |
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