Asymmetry measures and allometric growth parameter estimates for investigate effect of early feed restriction on deviation from bilateral symmetry in broiler chickens

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dc.contributor.authorMendes, Mehmet
dc.date.accessioned2025-01-27T20:31:22Z
dc.date.available2025-01-27T20:31:22Z
dc.date.issued2008
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThe purpose of this study is to investigate the effect of different feeding programs such as ad libitum feeding (AD), 20% feed restriction based on ad libitum group (FR1) and not fed between 9 a.m. and 3 p.m. (FR2) on deviation from bilateral symmetry or developmental stability in broiler chickens by means of two different approaches namely asymmetry measures and allometric growth model parameters. The weekly left and right sides of shank length, shank width, wing length and face width of chickens were collected from 7 days of age to 42 days of age. Results of this study showed that the deviations from the bilateral symmetry were mostly in fluctuating asymmetry (FA) in the FRI group birds. On the other hand, the deviations from the bilateral symmetry in the birds in group AD and FR2 were mostly in the form of anti-symmetry (AS) and directional asymmetry (DA)respectively. In this study, the deviation from the bilateral symmetry was mostly in FA type for the measured morphological characters for the FR1 group, and the FA level was usually lower indicating higher welfare level and lower developmental instability for these animals than that of the AD and FR2 groups. Allometric growth coefficients for evaluating the effects of the feeding programs on the developmental stability were a little bit different from the findings obtained by the asymmetry measures being taken into account. Allometric growth parameters, therefore, should be taken into consideration, along with asymmetry measures when investigating effect of rearing conditions or environmental conditions on developmental stability. As a conclusion, intensive feeding (AD) and long-term feed restriction (FR2) can be said as an important environmental factor affecting developmental stability and dependently athe animal welfare and performance.
dc.identifier.doi10.5194/aab-51-611-2008
dc.identifier.endpage619
dc.identifier.issn0003-9438
dc.identifier.issue6
dc.identifier.scopus2-s2.0-58149267725
dc.identifier.scopusqualityQ2
dc.identifier.startpage611
dc.identifier.urihttps://doi.org/10.5194/aab-51-611-2008
dc.identifier.urihttps://hdl.handle.net/20.500.12428/23117
dc.identifier.volume51
dc.identifier.wosWOS:000261441900010
dc.identifier.wosqualityQ3
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherArchiv Fur Tierzucht
dc.relation.ispartofArchiv Fur Tierzucht-Archives of Animal Breeding
dc.relation.publicationcategoryinfo:eu-repo/semantics/openAccess
dc.rightsinfo:eu-repo/semantics/openAccess
dc.snmzKA_WoS_20250125
dc.subjectbilateral symmetry
dc.subjectallometric growth function
dc.subjectdevelopmental stability
dc.subjectrepeated measurement
dc.subjectbroiler chickens
dc.titleAsymmetry measures and allometric growth parameter estimates for investigate effect of early feed restriction on deviation from bilateral symmetry in broiler chickens
dc.typeArticle

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