Effect of summer heat environment on body temperature, estrous cycles and blood antioxidant levels in Japanese Black cow

Animal Science Journal = Nihon Chikusan Gakkaihō
Miki SakataniMasashi Takahashi

Abstract

This study investigated the effect of summer heat environment on estrous cycles and blood antioxidant levels in Japanese Black cows. A total of 13 non-lactating Japanese Black cows (summer: 9, winter: 4) were examined. Body temperature was measured rectally and intravaginally using a thermometer and data logger, respectively. Estrous behavior was monitored using a radiotelemetric pedometer that recorded walking activity. Rectal temperatures were higher during summer than winter (P<0.001). There was an acute increase in vaginal temperature at the onset of estrus during winter but such an increase was not observed during summer. Walking activity during estrus decreased dramatically in the summer compared to the winter. Duration of estrous cycle was longer in summer (23.4 days, P<0.05) than winter (21.5 days), and the subsequent rise in progesterone concentrations following estrus tended to be delayed in summer. The level of thiobarbituric acid reactive substances (TBARS) in peripheral blood cells was higher during summer (P<0.05), while the levels of superoixde dismutase (SOD), glutathione peroxidase (GPx) and glutathione were lower (P<0.05). These results indicate that high ambient temperature during summer increases both body t...Continue Reading

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Citations

Aug 14, 2015·Animal Science Journal = Nihon Chikusan Gakkaihō·Satoshi HagaHiroshi Ishizaki
Mar 19, 2015·Tierärztliche Praxis. Ausgabe G, Grosstiere/Nutztiere·D Haser, M Fürll
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Aug 3, 2013·Animal Science Journal = Nihon Chikusan Gakkaihō·Satoshi HagaYoshihiro Kariya
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Mar 17, 2016·World Journal of Biological Chemistry·Biswaranjan PaitalGagan Bihari Nityananda Chainy
May 29, 2018·Animal Science Journal = Nihon Chikusan Gakkaihō·Takuo HojoNaoki Takenouchi
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Nov 8, 2020·Animal Science Journal = Nihon Chikusan Gakkaihō·Hanako BaiMasashi Takahashi
May 13, 2021·Proceedings. Biological Sciences·Joanna Stachowicz, Christina Umstätter
Oct 8, 2021·Journal of Animal Science·Atsushi ZodaMasahiro Satoh

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