Author/Authors :
Chakraborty, Arindam Department of Veterinary Physiology - College of Veterinary Science - Assam Agricultural University, Khanapara, India , Baruah, Anubha Department of Veterinary Physiology - College of Veterinary Science - Assam Agricultural University, Khanapara, India , Sarmah, B.C. Department of Veterinary Physiology - College of Veterinary Science - Assam Agricultural University, Khanapara, India , Goswami, J Department of Veterinary Physiology - College of Veterinary Science - Assam Agricultural University, Khanapara, India , Bora, Arundhati Department of Veterinary Physiology - College of Veterinary Science - Assam Agricultural University, Khanapara, India , Dutta, DJ Department of Veterinary Physiology - College of Veterinary Science - Assam Agricultural University, Khanapara, India , Biswa, RK Department of ARGO - College of Veterinary Science - Assam Agricultural University, Khanapara, India , Kalita, Dhireswar College of Veterinary Science - Assam Agricultural University, Khanapara, Guwahati , Naskar, S ICAR-IIAB,PDU Campus, Namkum, Ranchi, Jharkhand , Vashi, Y NRC on Pig, Rani, Guwahati , Phangchopi, Donna Department of Animal Genetics and Breeding - Lakhimpur College of Veterinary Science - Assam Agricultural University, Joyhing, North Lakhimpur, India
Abstract :
The present experiment was conducted to study the changes oftriiodothyronine (T3) and thyroxine (T4)hormones in the crossbred pigs (Hampshire × Assam local) under tropical climate and high rainfall conditionof Assam, India. The experiment included a total of 36 numbers of crossbred weaned female pigs. Eighteen (18) animals were subjected to treatment separately during summer and winter. The selected animals were divided into three groups with six pigs in each group consisting of the control group (Treatment 1), one group was fed melatonin @3 mg/animal (Treatment 2) and the other group was fed Vitamin E @100 mg (Treatment 3) for both the seasons. The animals were maintained in the College of Veterinary Science (AICRP on Pig), Assam Agicultural University, Khanapara, Guwahati-781022. The Temperature-Humidity Index (THI) was calculated out by using standard formula. Triiodothyronine (T3) and thyroxine (T4) hormones were estimated by Radioimmunoassay (RIA) technique. Serum T4 concentrations was significantly (P<0.01) lower during summer as compared to winter in all the treatment groups. Serum T4 concentration showed significant difference between treatment, between season and also between treatment and season.The thyroid levels showed alteration with the change in season, at the same time antioxidant supplementation was found to counter the seasonal stress upto an extent.
