| Autor: |
K. Joseph, U. Herbert, U. K. Oke |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Nigerian Journal of Animal Production. 32:315-320 |
| ISSN: |
0331-2062 |
| DOI: |
10.51791/njap.v32i2.1099 |
| Popis: |
The effect of photo-induced changes on egg production and reproductive performance of female guinea fowl was studied by exposing the birds to three photo-regimens, namely natural daylight all day for 12 weeks (NDL), 8 hours of light per day for 8 weeks (8L-16D) plus supplementary light for 16 hours per day for 4 weeks (16L-8D) (RSL), and provided natural daylight all day for 8 weeks plus supplementary light at 16 hours per day for 4 weeks (SL). Weight gain during the pre-laying period was similar (P>0.05) in all the treatment groups between 20-36 weeks of age. The reverse was the case during the laying period between 36-52 weeks, which coincided with the age at sexual maturity. Feed intake was similar (P>0.05) for the NDL and SL groups during the pre-laying period but the RSL group had significantly lower (P0.05) in body weight for all the groups. Age at first egg was significantly lower (P0.05). The guinea fowls which received 8 weeks of restricted light (RSL) responded more rapidly in terms of day-to-first-egg after exposure to 16 hours of light and achieved significantly higher (P |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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