To the authors’ knowledge there is no report in the
literature on thermal manipulation for improving semen
quality in chicken. Earlier, we did not find any beneficial
effects of 2 ◦C increased in ovo incubation temperature
during 16–18th days of incubation on rooster semen
quality (unpublished data). This 2 ◦C increased in ovo incubation
temperature during 16–18th days of incubation
has been shown to improve thermotolerance in chicks
(Yahav et al., 2004). In the present experiment a protocol