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פותח על ידי קלירמאש פתרונות בע"מ -
Technical note: Accelerometer-based recording of heavy breathing in lactating and dry cows as an automated measure of heat load
Year:
2019
Source of publication :
Journal of Dairy Science
Authors :
קאים, משה
;
.
Volume :
102
Co-Authors:

Bar, D., SCR Engineers Ltd., POB 13564, 18 Hamelacha St., Netanya, 4250553, Israel; Flamenbaum, I., Cow Cooling Solutions Ltd., Tel Aviv, 6971836, Israel; Hanochi, B., SCR Engineers Ltd., POB 13564, 18 Hamelacha St., Netanya, 4250553, Israel; Toaff-Rosenstein, R.L., SCR Engineers Ltd., POB 13564, 18 Hamelacha St., Netanya, 4250553, Israel

Facilitators :
From page:
3480
To page:
3486
(
Total pages:
7
)
Abstract:

Monitoring thermal status using a reliable, practical method is essential for proper cattle management during periods of high heat load. Our objective was to determine whether accelerometer-based tags, which measure heavy breathing and other behaviors on a minute-by-minute basis, accurately reflect thermal status. We hypothesized that the tags would mirror core body temperature as recorded by continuous intravaginal loggers, and that response to a cooling intervention would also be captured. Data were collected during a 3-d period from 10 late dry and 20 high-producing cows at peak lactation, each fitted with an intravaginal temperature logger and tag attached to a collar. The relationship between vaginal temperature and proportion of cows recorded as breathing heavily averaged over the three 24-h periods was described separately for each group, and during a 1-h block capturing 2 intensive cooling sessions in lactating cows. Finally, the log of the odds of a cow breathing heavily in each minute relative to vaginal temperature in cows before cooling was analyzed using a linear mixed model. The proportion of cows breathing heavily in a group mirrors changes in vaginal temperature in both dry and lactating cows. In contrast to the dry cows, lactating cows suffered from excessive heat load to a much greater degree. Cooling intensively with showers and fans effectively mitigates the effects of excessive heat load, as reflected by response in vaginal temperature and proportion of cows breathing heavily. The probability of heavy breathing increases by approximately 10% for each 0.5°C rise in vaginal temperature above 39.0°C. In conclusion, accelerometer-based technology that automatically records heavy breathing provides a practical means of continuously assessing heat load status of dairy cows, whether lactating or dry, and their response to cooling intervention. This has the potential to optimize both cow and resource management during periods of high heat load. © 2019 American Dairy Science Association

Note:
Related Files :
COOLING
heat stress
panting
Precision farming
עוד תגיות
תוכן קשור
More details
DOI :
10.3168/jds.2018-15186
Article number:
0
Affiliations:
Database:
סקופוס
Publication Type:
מאמר
;
.
Language:
אנגלית
Editors' remarks:
ID:
39367
Last updated date:
02/03/2022 17:27
Creation date:
20/02/2019 10:19
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Scientific Publication
Technical note: Accelerometer-based recording of heavy breathing in lactating and dry cows as an automated measure of heat load
102

Bar, D., SCR Engineers Ltd., POB 13564, 18 Hamelacha St., Netanya, 4250553, Israel; Flamenbaum, I., Cow Cooling Solutions Ltd., Tel Aviv, 6971836, Israel; Hanochi, B., SCR Engineers Ltd., POB 13564, 18 Hamelacha St., Netanya, 4250553, Israel; Toaff-Rosenstein, R.L., SCR Engineers Ltd., POB 13564, 18 Hamelacha St., Netanya, 4250553, Israel

Technical note: Accelerometer-based recording of heavy breathing in lactating and dry cows as an automated measure of heat load

Monitoring thermal status using a reliable, practical method is essential for proper cattle management during periods of high heat load. Our objective was to determine whether accelerometer-based tags, which measure heavy breathing and other behaviors on a minute-by-minute basis, accurately reflect thermal status. We hypothesized that the tags would mirror core body temperature as recorded by continuous intravaginal loggers, and that response to a cooling intervention would also be captured. Data were collected during a 3-d period from 10 late dry and 20 high-producing cows at peak lactation, each fitted with an intravaginal temperature logger and tag attached to a collar. The relationship between vaginal temperature and proportion of cows recorded as breathing heavily averaged over the three 24-h periods was described separately for each group, and during a 1-h block capturing 2 intensive cooling sessions in lactating cows. Finally, the log of the odds of a cow breathing heavily in each minute relative to vaginal temperature in cows before cooling was analyzed using a linear mixed model. The proportion of cows breathing heavily in a group mirrors changes in vaginal temperature in both dry and lactating cows. In contrast to the dry cows, lactating cows suffered from excessive heat load to a much greater degree. Cooling intensively with showers and fans effectively mitigates the effects of excessive heat load, as reflected by response in vaginal temperature and proportion of cows breathing heavily. The probability of heavy breathing increases by approximately 10% for each 0.5°C rise in vaginal temperature above 39.0°C. In conclusion, accelerometer-based technology that automatically records heavy breathing provides a practical means of continuously assessing heat load status of dairy cows, whether lactating or dry, and their response to cooling intervention. This has the potential to optimize both cow and resource management during periods of high heat load. © 2019 American Dairy Science Association

Scientific Publication
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