A COMPARATIVE STUDY ON HEAT TOLERANCE IN DECCANI AND NARI SUWARNA SHEEP
| dc.contributor.advisor | Dr. R.M.V. PRASAD | |
| dc.contributor.author | LINGAM LIKHITHA | |
| dc.date.accessioned | 2023-11-03T11:40:52Z | |
| dc.date.available | 2023-11-03T11:40:52Z | |
| dc.date.issued | 2022-03-29 | |
| dc.description.abstract | A comparative study on heat tolerance in Deccani and NARI Suwarna sheep was conducted to know the impact of heat stress on Deccani and NARI suwarna sheep breeds. Various parameters such as physiological, haemato-biochemical and behaviours were recorded by using suitable techniques and the same were compared. Twenty four young female sheep of 7-8 months age were selected (12+12) from Deccani and NARI Suwarna breeds. Care was taken to see that the selected sheep were of uniform body weight. The animals were maintained under standard housing and management conditions as practiced in the Livestock Farm Complex, college of veterinary science, Rajendranagar, Hyderabad. The investigation was carried out for a period of 120 days, during the summer season (March-June 2021). The physiological parameters studied were rectal temperature, respiration rate and heart rate. The mean morning rectal temperature in Deccani and NARI Suwarna recorded during March, April, May and June respectively were 101.8 ± 0.08, 102.2 ± 0.07, 102.4 ± 0.51, 101.8 ± 0.08 and 102.1 ± 0.26, 102.6 ± 0.23, 102.8 ± 0.12, 101.0 ± 0.06 0F. The mean noon rectal temperature in Deccani and NARI Suwarna during the months of March to June were found to be 103.6 ± 0.07, 104.7 ± 0.08, 104.9 ± 0.06, 102.7 ± 0.08 and 103 ± 0.08, 104.2 ± 0.12, 104.8 ± 0.07, 102.9 ± 0.16 0F respectively. The mean morning respiration rate (BPM) in Deccani and NARI Suwarna sheep recorded during March, April, May and June respectively were 30.23 ± 0.97, 31.13 ± 0.77, 31.12 ± 0.46, 35.15 ± 0.79 and 30.66 ± 0.79, 32.15 ± 0.79, 34.23 ± 1.41, 33.44 ± 0.85 BPM. Whereas, mean noon respiration rate in Deccani and NARI Suwarna during the months of March to June were found to be 36.15 ± 0.77, 37.08 ± 0.64, 47.44 ± 1.71, 45.93 ± 1.04 and 35.12 ± 0.46, 38.40 ± 0.85, 47.56 ± 0.97, 46.61 ± 1.12 BPM. The mean morning heart rate (bpm) in Deccani and NARI Suwarna sheep recorded during March, April, May and June respectively were 75.60 ± 0.92, 77.37 ± 1.12, 80.54 ± 1.167, 84.14 ± 0.93 and 76.00 ± 0.02, 77.63 ± 0.98, 82.13 ± 1.38, 81.95 ± 1.44. The mean afternoon heart rate (bpm) in Deccani and NARI Suwarna during the months of March to June were found to be 85.0 ± 1.02, 89.86 ± 1.68, 102.1 ± 2.42, 101.0 ± 1.03 and 90.6 ± 0.96, 91.66 ± 1.56, 103 ± 1.13, 101.4 ± 1.25. The results showed that there was a significant difference (p<0.05) in morning and afternoon recordings of various physiological parameters studied in Deccani and NARI Suwarna breeds. The overall mean physiological parameters studied in Deccani and NARI Suwarna breeds during the study period revealed that there was no significant difference between the breeds. Various haematological parameters such as Hb, RBC, PCV, WBC, MCV, MCH and MCHC were studied in the present investigation. The mean haemoglobin (g/dl) in Deccani and NARI Suwarna at beginning, mid and end of the experiment were 8.67 ± 0.34, 8.82 ± 0.40, 10.80 ± 0.78 and 8.50 ± 0.52, 9.08 ± 0.52, 10.36 ± 0.64 respectively. The mean RBC (106/μl) in Deccani and NARI Suwarna during the three stages of experiment were 8.81 ± 0.44, 8.80 ± 0.49, 9.11 ± 0.64 and 8.81 ± 0.73, 8.83 ± 0.66, 9.12 ± 0.79. The mean PCV (%) in Deccani and NARI Suwarna at beginning, mid and end of the experiment were 26.33 ± 1.47, 25.41 ± 1.27, 33.25 ± 2.13 and 24.72 ± 1.66, 25.69 ± 1.72, 30.96 ± 1.90 respectively. The mean WBC (103/μl) in Deccani and NARI Suwarna during the three stages of experiment were 9.42 ± 0.71, 9.05 ± 0.94, 9.40 ± 0.63 and 8.78 ± 0.79, 7.38 ± 0.62, 8.80 ± 0.55. The mean values of MCV (fl), MCHC (g/dl) and MCH (pg) in Deccani at beginning, mid and end of the experiment were 32.58 ± 1.66, 30.58 ± 0.84, 10.75 ± 0.28, 29.00 ± 0.62, 26.82 ± 0.19, 10.09 ± 0.21, 35.56 ± 2.41, 32.72 ± 1.50 and 11.90 ± 0.67 respectively. The mean values of MCV (fl), MCHC (g/dl) and MCH (pg) in NARI Suwarna during the three stages of experiment were 31.58 ± 1.38, 30.41 ± 0.69, 10.27 ± 0.46, 29.83 ± 1.16, 28.66 ± 0.11, 10.32 ± 0.42, 35.81 ± 1.08, 32.03 ± 1.23 and 11.18 ± 0.61. The results showed that significant difference (p<0.05) was observed between the stages of the experiment in both Deccani and NARI Suwarna but, the differences between the breeds were not found to be significant in all the haematological parameters that were studied. The various biochemical parameters such as urea (mg/dl), blood Urea Nitrogen (mg/dl), creatinine (mg/dl), total protein (g/dl), albumin (g/dl), SGPT (IU/L) and SGOT (IU/L). The mean values of urea in Deccani and NARI Suwarna at beginning, mid and end of the experiment were 36.63 ± 2.00, 33.78 ± 1.36, 36.02 ± 2.11 and 35.58 ± 2.61, 35.61 ± 0.87, 37.39 ± 2.12 mg/dl, respectively. The mean values of BUN in Deccani and NARI Suwarna at beginning, mid and end of the experiment were 16.56 ± 0.83, 15.78 ± 0.63, 17.23 ± 0.89 and 16.90 ± 0.59, 16.84 ± 0.39, 18.08 ± 0.86 mg/dl, respectively. The mean values of creatinine in Deccani and NARI Suwarna during the three stages of experiment were 1.385 ± 0.04, 1.398 ± 0.04, 1.458 ± 0.05 and 1.418 ± 0.04, 1.447 ± 0.08, 1.508 ± 0.07 mg/dl, respectively. The mean values of total protein in Deccani and NARI Suwarna during the three stages of experiment were 7.50 ± 0.33, 6.74 ± 0.12, 7.17 ± 0.15 and 7.50 ± 0.33, 7.79 ± 0.12, 7.60 ± 0.27 g/dl, respectively. The mean values of albumin in Deccani and NARI Suwarna at beginning, mid and end of the experiment were found to be 2.3 ± 0.12, 3.3 ± 0.12, 3.4 ± 0.09 and 2.3 ± 0.12, 3.6 ± 0.10, 3.6 ± 0.17 g/dl, respectively. The mean values of SGPT in Deccani and NARI Suwarna during the three stages of experiment were 41.48 ± 3.31, 35.86 ± 3.85, 34.01 ± 1.61 and 36.48 ± 2.56, 33.55 ± 2.26, 38.87 ± 2.67 IU/L, respectively. The mean values of SGOT in Deccani and NARI Suwarna during the three stages of experiment were 150.6 ± 1.36, 165.2 ± 1.87, 159.2 ± 1.05 and 147.9 ± 1.33, 161.0 ± 1.42, 155.8 ± 1.02. The results showed that significant difference (p<0.05) was observed between the stages of the experiment in both Deccani and NARI Suwarna but, the differences between the breeds were not found to be significant. The various behaviours that were studied viz., foraging, standing, rumination, drinking, lying, walking and elimination. The mean percentage (%) values of foraging behaviour in Deccani and NARI Suwarna from 10:00 A.M. to 4:00 P.M. at hourly intervals for six hours were 95.10, 88.16, 71.91, 39.14, 24.27, 29.12, 18.71 and 90.55, 86.09, 78.2, 37.49, 22.40, 28.02, 16.6. The mean (%) values of standing behaviour in Deccani and NARI Suwarna from 10:00 A.M. to 4:00 P.M. at hourly intervals for six hours were 15.25, 13.16, 13.16, 67.61, 61.66, 76.91, 77.63 and 13.85, 14.40, 15.01, 66.05, 64.5, 78.09 and 78.30. Whereas, the same for rumination in Deccani and NARI Suwarna were 4.16, 7.62, 24.15, 28.46, 32.22, 48.15, 44.16 and 5.55, 6.85, 28.16, 26.53, 34.99, 46.12, 48.91. The mean number of animals that had shown drinking behaviour in Deccani and NARI Suwarna from 10:00 A.M. to 4:00 P.M. were 14.84, 15.54, 20.85, 24.85, 28.84, 53.76, 53.38 and 12.08, 12.77, 23.46, 26.25, 24.15, 51.53, 51.15. with highest number of Deccani sheep had shown drinking behaviour at 11:00 A.M. wheras, the same for NARI Suwarna was at 1:00 P.M. The mean (%) values of lying behaviour in Deccani and NARI Suwarna observed from10:00 A.M to 4:00 P.M. were 10.23, 6.23, 12.07, 26.23, 24.84, 22.76, 22.31 and 12.77, 7.38, 10.77, 28.32, 26.22, 24.52, 23.32. The results in the present study about walking behaviour in Deccani and NARI Suwarna at 10:00, 11:00, 12:00, 1:00, 2:00, 3:00 and 4:00 hours respectively were 80.39, 71.78, 21.78, 4.01, 2.99, 2.42, 4.16 and 73.62, 72.47, 22.77, 6.38, 2.12, 1.76, 1.73. The mean (%) values of elimination behaviour in Deccani and NARI Suwarna from 10:00 A.M. to 4:00 P.M. at hourly intervals for six hours were 39.83, 35.66, 32.88, 27.25, 33.41, 23.41, 28.02 and 33.22, 31.92, 31.44, 29.25, 31.40, 21.01, 27.00. The results showed that the differences between the breeds were not found to be significant at hourly intervals for all behaviours that were studied. The mean cortisol (μg/dl) at the three stages of experiment viz., beginning, mid and end of experiment in Deccani and NARI Suwarna, respectively were 2.35 μg/dl, 2.48 μg/dl, 3.32, 3.48 μg/dl, 2.12, 2.14 μg/dl and the mean body weights at the three stages of experiment were found to be 26.6 and 29.9kg, 24.2 and 27.81 kg, 25.5 and 30.1 kg respectively. There was increase in cortisol levels during the heat stress period i.e during mid of the experiment. NARI Suwarna sheep had shown a non-significantly higher values when compared to that of Deccani. There was a non-significant change in body weights in the Deccani and NARI Suwarna. The average coefficient values obtained through Iberian heat tolerance test regarding heat tolerance coefficient (HTC) studies during different months under study were found to be 104.75 in Deccani and 102.75 in NARI Suwarna and the average index values obtained through Benezra heat tolerance test were found to be 2.36 in Deccani and 2.37 in NARI Suwarna. | |
| dc.identifier.other | LINGAM LIKHITHA | |
| dc.identifier.uri | https://krishikosh.egranth.ac.in/handle/1/5810200235 | |
| dc.language.iso | English | |
| dc.pages | 118 | |
| dc.publisher | PVNRTVU, HYDERABAD | |
| dc.sub | Livestock Production and Management | |
| dc.theme | LPM | |
| dc.these.type | M.V.Sc. | |
| dc.title | A COMPARATIVE STUDY ON HEAT TOLERANCE IN DECCANI AND NARI SUWARNA SHEEP | |
| dc.type | Thesis |