Feathersexing of meat chicken breeds in Australia is not possible anymore due to the change of genetics that slow feathering female is no longer used for breeding broilers. Therefore, researchers in poultry nutrition area are facing difficulty to perform studies in a powerful manner. Other sexing methods are available and in ovo sexing technologies are under development. However, whether these sexing approaches are practical for research purpose has not been assessed. Furthermore, whether performing research experiments with single sex (i.e., male only), same sex ratio (1:1) among the treatments, or with randomly distributed sex in the treatment aided by using sex as covariate are powerful enough for research purpose has not been fully understood in poultry.
University of New England
The assessment of sexing options for nutritional research As the birds are not feather sexable anymore as has been stated in the previous sections, the ways to obtain single sex birds will be explored and compared for availability, feasibility and cost effectiveness. The approaches include the following steps to assess likelihood to sex birds in hatcheries or on the arrival of research facility using the commonly used methods, and statistical power of experimental design using sex separated chickens or equally mixedsex chicken: 1. Assess the availability and costs of vent sexing in hatcheries to obtain maleonly day old birds for the research groups at University of New England, The University of Sydney, The University of Queensland, and South Australia Research and Development Institute (SARDI). We will communicate with the hatcheries and poultry sexers in surveying: a. likelihood of the hatcheries to allow sexers to access the hatcheries to vent sex birds; b. the availability and costs for sexers to vent sex birds at hatcheries at research scale. 2. Statistical power of experimental design using sex separated chickens or equally mixedsex chicken – growth response of birds to low protein diet compared to normal protein diet Experiment 1. The experiment will be performed to employ a 2 × 2 factorial arrangement of treatments with rearing (separate or mixed) and protein level (for example, normal 21%, and low 19% at grower phase) as factors. The birds will be sexed at day 0 (vent sexing) or d7 (DNA sexing) after the arrival of day old chicks at the research facility. The birds will then be allocated to floor pens for performance measurements. The birds will be fed with starter, grower and finisher, and treatments of different protein levels will be applied.
Project Start Date
Friday, June 14, 2019
Project Completion Date
Friday, December 18, 2020
Journal Articles From Project
An environmentally sustainable Australia
Adoption of R&D
CME-Improve chicken meat production through the whole supply chain