Effects of high heat load conditions on body weight, feed intake, temperature, and respiration of Dorper, Katahdin, and St. Croix sheep
Forty-six Dorper, 46 Katahdin, and 43 St. Croix female sheep from four regions of the USA were used to evaluate responses to high heat load index (HLI) conditions. There were sequential 2-wk periods with target HLI during day/nighttime of 70/70 (thermoneutral zone conditions), 85/70, 90/77, and 95/8...
| Main Authors: | , , , |
|---|---|
| Format: | Article |
| Language: | English |
| Published: |
Taylor & Francis Group
2019-01-01
|
| Series: | Journal of Applied Animal Research |
| Subjects: | |
| Online Access: | http://dx.doi.org/10.1080/09712119.2019.1674658 |
| _version_ | 1819230111819366400 |
|---|---|
| author | Dereje Tadesse Ryszard Puchala Terry A. Gipson Arthur L. Goetsch |
| author_facet | Dereje Tadesse Ryszard Puchala Terry A. Gipson Arthur L. Goetsch |
| author_sort | Dereje Tadesse |
| collection | DOAJ |
| description | Forty-six Dorper, 46 Katahdin, and 43 St. Croix female sheep from four regions of the USA were used to evaluate responses to high heat load index (HLI) conditions. There were sequential 2-wk periods with target HLI during day/nighttime of 70/70 (thermoneutral zone conditions), 85/70, 90/77, and 95/81. Rectal temperature (RT) and respiration rate (RR) were measured at 07:00 (before daytime), 13:00, and 17:00 h (preceding nighttime). Region had few and minor effects. Intake of DM (g/day) was not influenced by period. Rectal temperature was considerably less for St. Croix than for Dorper and Katahdin at each time, with differences increasing as period advanced. Similarly, RR in periods 2, 3, and 4 was least for St. Croix, particularly at 07:00 h in period 4. Moreover, RT was slightly less for Katahdin vs. Dorper in period 4 at 13:00 and 17:00 however, RR was less for Katahdin than for Dorper in periods 3 and 4. Variance in RT in periods 3 and 4 ranked St. Croix < Dorper < Katahdin. In conclusion, based on RT and RR, resilience to high HLI conditions ranked St. Croix > Katahdin > Dorper, with lowest variability among individuals for St. Croix and greatest for Katahdin. |
| first_indexed | 2024-12-23T11:23:53Z |
| format | Article |
| id | doaj.art-911b0557d00b4bec8892a73e30140c29 |
| institution | Directory Open Access Journal |
| issn | 0971-2119 0974-1844 |
| language | English |
| last_indexed | 2024-12-23T11:23:53Z |
| publishDate | 2019-01-01 |
| publisher | Taylor & Francis Group |
| record_format | Article |
| series | Journal of Applied Animal Research |
| spelling | doaj.art-911b0557d00b4bec8892a73e30140c292022-12-21T17:49:00ZengTaylor & Francis GroupJournal of Applied Animal Research0971-21190974-18442019-01-0147149250510.1080/09712119.2019.16746581674658Effects of high heat load conditions on body weight, feed intake, temperature, and respiration of Dorper, Katahdin, and St. Croix sheepDereje Tadesse0Ryszard Puchala1Terry A. Gipson2Arthur L. Goetsch3American Institute for Goat Research, Langston UniversityAmerican Institute for Goat Research, Langston UniversityAmerican Institute for Goat Research, Langston UniversityAmerican Institute for Goat Research, Langston UniversityForty-six Dorper, 46 Katahdin, and 43 St. Croix female sheep from four regions of the USA were used to evaluate responses to high heat load index (HLI) conditions. There were sequential 2-wk periods with target HLI during day/nighttime of 70/70 (thermoneutral zone conditions), 85/70, 90/77, and 95/81. Rectal temperature (RT) and respiration rate (RR) were measured at 07:00 (before daytime), 13:00, and 17:00 h (preceding nighttime). Region had few and minor effects. Intake of DM (g/day) was not influenced by period. Rectal temperature was considerably less for St. Croix than for Dorper and Katahdin at each time, with differences increasing as period advanced. Similarly, RR in periods 2, 3, and 4 was least for St. Croix, particularly at 07:00 h in period 4. Moreover, RT was slightly less for Katahdin vs. Dorper in period 4 at 13:00 and 17:00 however, RR was less for Katahdin than for Dorper in periods 3 and 4. Variance in RT in periods 3 and 4 ranked St. Croix < Dorper < Katahdin. In conclusion, based on RT and RR, resilience to high HLI conditions ranked St. Croix > Katahdin > Dorper, with lowest variability among individuals for St. Croix and greatest for Katahdin.http://dx.doi.org/10.1080/09712119.2019.1674658adaptationhair sheepheat load |
| spellingShingle | Dereje Tadesse Ryszard Puchala Terry A. Gipson Arthur L. Goetsch Effects of high heat load conditions on body weight, feed intake, temperature, and respiration of Dorper, Katahdin, and St. Croix sheep Journal of Applied Animal Research adaptation hair sheep heat load |
| title | Effects of high heat load conditions on body weight, feed intake, temperature, and respiration of Dorper, Katahdin, and St. Croix sheep |
| title_full | Effects of high heat load conditions on body weight, feed intake, temperature, and respiration of Dorper, Katahdin, and St. Croix sheep |
| title_fullStr | Effects of high heat load conditions on body weight, feed intake, temperature, and respiration of Dorper, Katahdin, and St. Croix sheep |
| title_full_unstemmed | Effects of high heat load conditions on body weight, feed intake, temperature, and respiration of Dorper, Katahdin, and St. Croix sheep |
| title_short | Effects of high heat load conditions on body weight, feed intake, temperature, and respiration of Dorper, Katahdin, and St. Croix sheep |
| title_sort | effects of high heat load conditions on body weight feed intake temperature and respiration of dorper katahdin and st croix sheep |
| topic | adaptation hair sheep heat load |
| url | http://dx.doi.org/10.1080/09712119.2019.1674658 |
| work_keys_str_mv | AT derejetadesse effectsofhighheatloadconditionsonbodyweightfeedintaketemperatureandrespirationofdorperkatahdinandstcroixsheep AT ryszardpuchala effectsofhighheatloadconditionsonbodyweightfeedintaketemperatureandrespirationofdorperkatahdinandstcroixsheep AT terryagipson effectsofhighheatloadconditionsonbodyweightfeedintaketemperatureandrespirationofdorperkatahdinandstcroixsheep AT arthurlgoetsch effectsofhighheatloadconditionsonbodyweightfeedintaketemperatureandrespirationofdorperkatahdinandstcroixsheep |