000145167 001__ 145167
000145167 005__ 20241003094705.0
000145167 0247_ $$2doi$$a10.1016/j.japr.2024.100475
000145167 0248_ $$2sideral$$a139980
000145167 037__ $$aART-2024-139980
000145167 041__ $$aeng
000145167 100__ $$0(orcid)0000-0003-2827-3054$$aAbecia, J.A.$$uUniversidad de Zaragoza
000145167 245__ $$aApplied research note: comparison of the locomotor activity and circadian rhythm in 3 strains of laying hens as measured by tri-axial accelerometers
000145167 260__ $$c2024
000145167 5060_ $$aAccess copy available to the general public$$fUnrestricted
000145167 5203_ $$aThe objective of this study was to use tri-axial accelerometers to quantify circadian changes in the locomotor activity of 3 strains of laying hens. Animals were from either the White, Brown or Black strain of a farm that breeds free-range laying hens. Hens were fitted with commercially available sensors that record high resolution raw acceleration data, which were attached to the back of the hen by nylon harnesses and remained in place for 7 d. Separately, animals from each of the strains were allocated to an indoor hen house (density = 0.5 m2/hen), which had an artificial photoperiod (16L:8D), and an adjacent outdoor pen (4 m2). Minute-by-minute activity data values (Vector Magnitude, VM) were calculated from the activity counts of each of the 3 axes. Mean (± S.E.) activity (counts/min) of the White strain (was significantly (P < 0.001) higher than that of the other 2 strains. Hens were quiet in the dark period of the day, and were significantly (P < 0.001) more active in the light period. Locomotor activity differed significantly (P<0.001) among strains in both the dark and the light periods. All hens exhibited a 24-h circadian rhythm in activity, and significantly different MESOR and acrophases (P < 0.001). In conclusion, the tri-axial accelerometers tested in this study were useful for measuring locomotor activity in laying hens, and the animals adapted quickly to wearing the devices attached to harnesses. Hens from the 3 strains exhibited the same pattern in locomotor activity throughout the day, although they differed in the intensity of their activity
000145167 540__ $$9info:eu-repo/semantics/openAccess$$aby-nc-nd$$uhttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
000145167 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion
000145167 700__ $$aPalacios, C.
000145167 700__ $$aPlaza, J.
000145167 700__ $$aNieto, J.
000145167 700__ $$aCanto, F.
000145167 7102_ $$12008$$2700$$aUniversidad de Zaragoza$$bDpto. Produc.Animal Cienc.Ali.$$cÁrea Producción Animal
000145167 773__ $$g33, 4 (2024), 100475 [6 pp.]$$pJ. appl. poult. res.$$tJOURNAL OF APPLIED POULTRY RESEARCH$$x1056-6171
000145167 8564_ $$s715257$$uhttps://zaguan.unizar.es/record/145167/files/texto_completo.pdf$$yVersión publicada
000145167 8564_ $$s2067455$$uhttps://zaguan.unizar.es/record/145167/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada
000145167 909CO $$ooai:zaguan.unizar.es:145167$$particulos$$pdriver
000145167 951__ $$a2024-10-03-08:56:17
000145167 980__ $$aARTICLE