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Morphological traits as early indicators of male broiler breeder fertility
Dissertation (MSc (Animal Science : Animal Production))--University of Pretoria, 2012.
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| Format: | Thesis |
| Language: | English |
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University of Pretoria
2013
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| _version_ | 1867613714979487744 |
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| access_status_str | Open Access |
| author2 | dolano@iburst.co.za |
| author_browse | dolano@iburst.co.za |
| author_facet | dolano@iburst.co.za |
| collection | Thesis |
| dc_rights_str_mv | © 2012 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria |
| description | Dissertation (MSc (Animal Science : Animal Production))--University of Pretoria, 2012. |
| format | Thesis |
| id | oai:repository.up.ac.za:2263/30899 |
| institution | University of Pretoria (South Africa) |
| language | English |
| last_indexed | 2026-06-10T12:40:32.922Z |
| license_str | Other — see source repository |
| provenance_str_mv | Harvested via OAI-PMH from UPSpace — University of Pretoria Institutional Repository |
| publishDate | 2013 |
| publishDateRange | 2013 |
| publishDateSort | 2013 |
| publisher | University of Pretoria |
| publisherStr | University of Pretoria |
| record_format | dspace |
| source_str | UPSpace — University of Pretoria Institutional Repository |
| spelling | oai:repository.up.ac.za:2263/30899 Morphological traits as early indicators of male broiler breeder fertility dolano@iburst.co.za Dr C D Le Roux Prof E van Marle Köster Oosterberg, Dolan Russell UCTD Human diets Fertility Male broiler breeder White meat Dissertation (MSc (Animal Science : Animal Production))--University of Pretoria, 2012. The broiler industry is a primary supplier of white meat and a popular protein source in human diets. The poultry industry aims to produce a broiler chick with high liveability, high growth and high feed conversion efficiency; therefore high growth performance has been emphasized in the parent stock. Fertility of the broiler breeders is one of the most important aspects in broiler production. Standard hatchery practice for fertility determination is 18-day candling, but a more suitable indicator would be a 12-day breakout. The aim of this study was to evaluate routine farm data and to identify additional measurements as early indicators of male broiler breeder fertility. The results showed that neither the routine nor the additional male body weight measurements significantly contributed to either 18- or 12- day fertility (P > 0.0001). Female weight, however, contributed significantly to 18-day fertility (P > 0.0001). Shank length only showed a significant effect (P > 0.005) on 18-day fertility. Routine body condition score and routine vent score both contributed significantly to 18-day fertility (P > 0.0001). Additional vent score was shown to have a significant effect on 12-day fertility at P > 0.005; similarly additional body condition score also had a significant effect on 12-day fertility, but at P > 0.05. The limitations in this study, including the small sample size may have contributed to the lack of significance found in the measurements used. The results indicate that further studies under controlled conditions may be useful in identifying shank length as an early indicator of male broiler breeder fertility. Animal and Wildlife Sciences MSc (Animal Science) Unrestricted 2013-09-09T07:48:00Z 2013-06-07 2013-09-09T07:48:00Z 2013-04-10 2012-06-07 2013-06-04 Dissertation Oosterberg, DR 2012, Morphological traits as early indicators of male broiler breeder fertility, MSc(Agric) dissertation, University of Pretoria, Pretoria, viewed yymmdd < http://upetd.up.ac.za/thesis/available/etd-06042013-151654 / > E13/4/544/gm http://hdl.handle.net/2263/30899 http://upetd.up.ac.za/thesis/available/etd-06042013-151654/ en © 2012 University of Pretoria. All rights reserved. The copyright in this work vests in the University of Pretoria. No part of this work may be reproduced or transmitted in any form or by any means, without the prior written permission of the University of Pretoria application/pdf University of Pretoria |
| spellingShingle | UCTD Human diets Fertility Male broiler breeder White meat Morphological traits as early indicators of male broiler breeder fertility |
| title | Morphological traits as early indicators of male broiler breeder fertility |
| title_full | Morphological traits as early indicators of male broiler breeder fertility |
| title_fullStr | Morphological traits as early indicators of male broiler breeder fertility |
| title_full_unstemmed | Morphological traits as early indicators of male broiler breeder fertility |
| title_short | Morphological traits as early indicators of male broiler breeder fertility |
| title_sort | morphological traits as early indicators of male broiler breeder fertility |
| topic | UCTD Human diets Fertility Male broiler breeder White meat |
| url | http://hdl.handle.net/2263/30899 http://upetd.up.ac.za/thesis/available/etd-06042013-151654/ |