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The effect of exogenous melatonin administration on sperm quality and some stress related parameters of broiler breeder males under natural summer conditions.
| Content Provider | Semantic Scholar |
|---|---|
| Author | Kozanoğlu, Hayri Babacanoğlu, Elif Özkan, Sezai |
| Copyright Year | 2006 |
| Abstract | Twenty-four broiler breeder males (39 weeks old) were randomly distributed in two groups consisting of twelve each and were caged, individually. In the melatonin treated group (M), roosters were orally administrated with 3 mg of melatonin per kg body weight between per day 11.00 and 12.00 a.m. The other group was considered as control (C). During the experimental period of 20 days, duration of hot hours measured (≥32 oC) per day was ranged between 6 to 10 h with an average of 8 h. Blood samples of birds were collected at the beginning (day 0) and 2 wk (day 14) after the treatment had been started for white blood cells count and heterophil to lymphocyte ratio (H:L). Sperm was collected at 0, 3, 7, 12 and 16 days of experiment to evaluate sperm quality parameters. Melatonin administration significantly increased the percentages of normal live sperm (P<0.05) and decreased abnormal and dead sperm percentages (P<0.05). However, numerical increase in sperm concentration of M males was not statistically significant. At the end of the experimental period, semen was collected from each male and 7 hens per male were artificially inseminated. Thereafter, roosters were killed and organ weights were recorded. Hatching eggs were collected for 7 days and incubated. At hatch, chick weight and organ weights were recorded in sampled chicks. A significant positive effect of melatonin has been observed on hatch weight and relative spleen weight of chicks from males in M (P<0.05). However, percentage of fertile eggs did not differ with melatonin treatment. H:L ratio, as a good indicator of stress, differed significantly between treatments being lower (0.34±0.01) in M males than C (0.44±0.01). However, rectal body temperatures of males were similar in both M and C. As a result, melatonin had a positive effect on stress status of roosters as shown by lower H:L ratios under natural summer conditions. However, improvement in sperm quality parameters did not result in a better fertility rate in M. Higher hatching and relative spleen weight of chicks from M males might be referred to the positive effect of melatonin on growth however this needs further investigation. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.cabi.org/Uploads/animal-science/worlds-poultry-science-association/WPSA-italy-2006/10302.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
