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	Provedor de dados Rev. Bras. Ciênc. Avic. (2) Autor Kasperek,K (2) Rozempolska-Rucinska,I (2) Zieba,G (2) Bownik,A (1) Kibala,L (1) Kozak,A (1) Lukaszewicz,M (1) Prochniak,T (1) Slaska,B (1) Mais... Palavra-chave Emotional reactivity (1) Laying hens (1) Novel Object Test (1) Selection criterion (1) Tracker® software (1) Trait choice. (1) Variance components (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2018 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Analysis of Behavioural Profile of Hens with the Use of Computer Software Rev. Bras. Ciênc. Avic. Rozempolska-Rucinska,I; Bownik,A; Prochniak,T; Zieba,G; Slaska,B; Kasperek,K; Kozak,A. ABSTRACT The aim of the study was to evaluate the emotional reactivity of hens with the use of physical parameters such as movement velocity and position of the selected parts of the body analysed by computer software - Tracker®. 200 Rhode Island White hens kept individually in a laying hen breeding farm were used in the study. The analysis of hens behaviour was performed with the use of Novel Object Test. Afterwards the video clips were analysed to determine behavioural reactivity with the use of Tracker® software by analysis of two control points: the upper part of the head and the peak of the tail. The results suggest that it is possible to use Tracker® software for evaluation of hens behavioural profile and this sort of analysis enables to classify... Tipo: Info:eu-repo/semantics/article Palavras-chave: Emotional reactivity; Laying hens; Novel Object Test; Tracker® software. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000300413 Eggshell Qualities as Indicative of Eggshell Strength for Layer Selection Rev. Bras. Ciênc. Avic. Kibala,L; Rozempolska-Rucinska,I; Kasperek,K; Zieba,G; Lukaszewicz,M. ABSTRACT The study aimed at investigating which of four traits is the most representative of eggshell strength (destructive eggshell thickness measurement, eggshell weight, egg specific gravity, ultrasonic measurement of eggshell thickness) and could be used for selection purposes. To date, investigations focused mostly on pairwise (eggshell strength vs. another eggshell feature) analyses, resulting in two-, maybe three-trait, models when eggshell traits are considered. Since the covariance estimates are also model dependent, we collected five eggshell traits within one analysis, which better reflects what occurs in nature. The eggs were collected from 4571 Rhode Island White and 2426 Rhode Island Red hens. A multiple-trait animal model and the REML method... Tipo: Info:eu-repo/semantics/article Palavras-chave: Variance components; Selection criterion; Trait choice.. Ano: 2018 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-635X2018000100099 Registros recuperados: 2 Primeira ... 1 ... Última

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