Assessment of normal mortalities, biosecurity and welfare of Lohmann Brown layers at a farm in central Namibia select="/dri:document/dri:meta/dri:pageMeta/dri:metadata[@element='title']/node()"/>

DSpace Repository

Show simple item record Samkange, Alaster Mushonga, Borden Kandiwa, Erick Kambode, Josephina Ndamonako Mbiri, Pricilla Gorejena, Brighton Madzingira, Oscar 2020-09-24T07:17:27Z 2020-09-24T07:17:27Z 2020
dc.identifier.citation Samkange, A. et al. (2020). Assessment of normal mortalities, biosecurity and welfare of lohmann brown layers at a farm in central Namibia. International Journal of Poultry Science, 1-10. en_US
dc.description.abstract Objective: The current study investigated the causes of mortality and evaluated the biosecurity situation and welfare conditions of Lohmann Brown layer chickens reared for 12 months, from point-of-lay, at farm A in central Namibia. Materials and Methods: Necropsies, standard biosecurity appraisal and on-farm welfare assessment tools were used. A standard protocol was used for post-mortem examinations of dead birds. The Chi-square test was used for analysis of causes of mortality whilst linear regression was used for analysis of the temporal distribution of mortality. Results: The overall mortality rate throughout the study period was 18.7% (N = 1000). There was a very strong negative correlation between duration of birds in lay and proportion of live birds [r (162) = 0.97, p<0.05]. The proportion of live birds decreased by an average of 2.98% for every 50 days of the laying period. Overall, the proportional mortalities due to undetermined causes (31.6%) were greater than those due to inflammatory conditions, trauma, cannibalism and retained eggs (20.9,19.3,16.6 and 11.8% respectively, p<0.05). Conclusion: The high mortality rates reported in this study have an obvious negative impact on productivity and thus there is a need to improve the biosecurity and welfare conditions for these layers in order to improve profitability. en_US
dc.language.iso en en_US
dc.subject Lohmann brown layers en_US
dc.subject Layer mortality en_US
dc.subject Biosecurity en_US
dc.title Assessment of normal mortalities, biosecurity and welfare of Lohmann Brown layers at a farm in central Namibia en_US
dc.type Article en_US

Files in this item

This item appears in the following Collection(s)

Show simple item record