Seasonal variations on semen quality attributes in turkey and egg type chicken male breeders

The effect of Thai ginger (Kaempferia parviflora) extract orally administration on sperm production, semen preservation, and fertility in Thai native chickens under heat stress

“…Sperm production in roosters is affected by various factors, including breed, age, nutrition, and environment. In tropical regions, high environmental temperature and humidity cause heat stress in poultry, subsequently decreasing the growth rate ( Boonkum et al, 2021 ) and resulting in detrimental effects on semen production ( Obidi et al, 2008 ; Harsha et al, 2021 ; Prabakar et al, 2022 ). Therefore, there is a need to investigate whether any improvement in the reproductive performance positively affects the production of indigenous chicken raised in tropical areas.…”

“…Meanwhile, the DMF induced dilatation of the arteries ( Temkitthawon et al, 2011 ) and enhanced testosterone production through cAMP in rat testicular tumor cells ( Horigome et al, 2014 ). Therefore, it might be implied that increasing blood flow to the testis would stimulate testosterone production and secretion ( Damber and Janson, 1978 ) by acting directly on the Sertoli cells to stimulate spermatogenesis ( O'Donnell et al, 1994 ), subsequently impacting testicular function and sperm development ( Prabakar et al, 2022 ). Furthermore, testicular blood flow was related to testicular weight ( Wang et al, 1983 ); thus, an increase in the testicular weight was also observed in the present study ( Table 4 ).…”

“…This demonstrates that indigenous Thai roosters were exposed to unsuitable temperatures and humidity, resulting in a lower reproductive potential for almost a year. Similarly, adverse climate conditions during hot climatic conditions severely affect semen production, as semen volume and sperm concentration have been shown in other poultry ( Obidi et al, 2008 ; Harsha et al, 2021 ; Prabakar et al, 2022 ). Exposure to high ambient temperatures or heat stress (temperature, 40°C ± 0.5°C; humidity, 63.0–80.0%) seems to induce abnormality in the spermatogenic cells in chicken testes and reduce testosterone production, subsequently decreasing the sperm quality ( Chen et al, 2015 ).…”

Influence of Semen Collection Frequency and Seasonal Variations on Fresh and Frozen Semen Quality in Thai Native Roosters

“…Exposure to heat stress at a temperature greater than 32 ± 1 • C with a humidity of 55-65% could induce spermatogenic cell abnormalities in chicken testes and decrease testosterone production [24,25]. Testosterone is necessary for spermatogenesis [26]; a higher level of testosterone in chickens was observed during the winter, and this might be responsible for a higher sperm concentration [14]. Wannaratana et al [27] and Karaca et al [28] also reported similar findings on increased sperm production during the winter in pigeons, turkeys, and White Leghorns.…”

“…In broiler roosters, a significantly reduced sperm concentration (3.21 × 10 9 sperm per mL) occurs in the first week of heat stress [13]. A commercial rooster (White Leghorn) raised in India exhibited superior reproductive performance during the winter [14]. However, a study on seasonal variation in semen quality has never been reported in Thai native chickens.…”