- Title
- Effect of photoperiod on sexual development, growth and production of quail (coturnix coturnix japonica)
- Creator
- De Jager, Pieter Herodes
- Subject
- Quails
- Subject
- Quails -- Growth
- Subject
- Quails -- Effect of light on
- Subject
- Photoperiodism
- Date Issued
- 2003
- Date
- 2003
- Type
- Thesis
- Type
- Masters
- Type
- MTech (Agricultural Management)
- Identifier
- vital:10969
- Identifier
- http://hdl.handle.net/10948/227
- Identifier
- Quails
- Identifier
- Quails -- Growth
- Identifier
- Quails -- Effect of light on
- Identifier
- Photoperiodism
- Description
- The aim of the study was to determine the effect of photoperiod on production of quail in South Africa. Day old chicks were randomly divided into two groups. One group (n=74) received continuous light (LL) while the other group (n=77) received 13 h of light (LD) per day. Traits measured were sexual characteristics (age at sexual maturity and testis weight, egg production and egg weight) and growth (body weight) development in males and females respectively. Significant differences in growth existed between sexes; females were 171.44±17.15 and 182.91±17.75 g compared to the 151.77±13.20 and 155.00±16.86 g for males in both LL and LD groups respectively. Both males and females in the LL group initially outperformed the LD group in growth rate but, by day 72 the LD group had compensated and were 4.6% heavier than the LL group. A similar trend was observed for sexual maturity between the LL and LD groups. However, photoperiod did significantly influence initial egg production in favour of the LL group. The LL group had 80% of the females in production by day 44 compared to the 60% of the LD group. The initial egg weight of the LL group was 14 % higher than those of the LD group. Quail subjected to continuous light attained earlier sexual maturity and production with lower final weight compared to quail subjected to an intermediate photoperiod. The application of a longer photoperiod would therefore favour an egg production system.
- Format
- xiii, 64 leaves
- Format
- Publisher
- Port Elizabeth Technikon
- Publisher
- Faculty of Science
- Language
- English
- Rights
- Nelson Mandela Metropolitan University
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