EFFECT OF TEMPERATURE VARIATION ON LEUTINISING HORMONE, FOLLICLE STIMULATING HORMONE AND CORTISOL HORMONE DURING VARIOUS STAGES OF REPRODUCTION IN CHHOTANAGPURI EWE
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Authors
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R.K. VERMA
Department of Veterinary Physiology,
College of Veterinary Science & Animal Husbandry, BAU, Ranchi, Jharkhand- 834006, India
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A.K. ISHWAR
Department of Veterinary Physiology,
College of Veterinary Science & Animal Husbandry, BAU, Ranchi, Jharkhand- 834006, India
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R.S.D. BARMAN
Department of Veterinary Physiology,
College of Veterinary Science & Animal Husbandry, BAU, Ranchi, Jharkhand- 834006, India
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A. BHARTI
Department of Veterinary Physiology,
College of Veterinary Science & Animal Husbandry, BAU, Ranchi, Jharkhand- 834006, India
Abstract
ABSTRACT
The present study was carried out to see the effect of different housing system on 24
non-pregnant healthy Chhotanagpuri ewes which were allocated equally to three different
groups. Animals of group I were kept between the temperature range of 350C to 400C in
intensive system in hot and humid condition, animals of group II were kept under intensive
system between 200C-270C and animals of group III were kept under extensive system and
served as control. The ewes allotted to different treatment groups were of nearly similar age
and body weight. The physiological considerations like reproductive hormones LH, FSH and
other important metabolic hormones like Cortisol plays vital role in regulating the
reproductive efficiency. Therefore Plasma LH, plasma FSH and plasma Cortisol hormones
concentration were estimated during the experimental period. The study revealed that the
Plasma LH and plasma FSH concentration between different groups did not vary significantly
(p<0.01) while plasma Cortisol hormone varied significantly (p<0.05) among the groups. All
the three hormones varied significantly within group. The plasma LH level decreased from
day 20 to 135 and started increasing significantly on expected day of parturition and reached
its highest level at two days after parturition in all the groups. The FSH concentration
decreased on day 20 and 45 of gestation and was lowest at two days after parturition in all
the groups. The plasma cortisol reached peak level at expected date of parturition but
decreased drastically to its lowest level 2 days after parturition. The study reveled that
different housing system did not had any significant effect on the blood hormonal profiles
during different stages of gestation.
Key words : Temperature, Luteinizing Hormone, Follicle Stimulating Hormone, Cortisol,
Chhotanagpuri, Ewe
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