Telemetric monitoring of calving using a novel calf alert device

Cyril Stephen, Don Menzies, David Swain, Kym Patison, Nicholas Corbet, Scott Norman

Research output: Other contribution to conferenceAbstract

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Abstract

In extensive grazing systems, lack of methods to monitor calving has been an impediment to characterizing and managing calf losses. A device that could telemetrically detect time and location of a portion of parturition events would allow timely recording of calving-related data, increase opportunities to conduct necropsies and be useful to quantify and derive scientifically based conclusions for neonatal calf mortality and morbidity. Objective was to build and evaluate a telemetric calf alert device suitable for identification of the time and location of calving events in extensive beef production herds in northern Australia. A prototype device was selected from several preliminary designs, based on cow safety and 100% vaginal retention as tested in a 28-day field trial in 5 non-pregnant cows. The device was further developed incorporating a Taggle™ PCB (printed circuit board) and a battery (life of 2 years) within a cargo pod. Taggle™ location system consists of 3 components - a transmitter that outputs a low-power radio signal; a sensitive terrestrial receiver that detects the Taggle™ ping and its time of arrival; and a method of transmitting the time of ping arrival at each receiver to a central location server. When Taggle™ ping is detected by 3 or more receivers, the time difference of arrival of these signals is used to calculate the location of the transmitter. Device transmits signals every 15 minutes and can transmit to receivers up to 7 km away. Device was active from the time of intravaginal insertion, sending out attenuated signals detectable by receivers. At device expulsion during parturition, improved reception of the unattenuated signal allowed the timing and location of calving event to be transmitted. A field trial was conducted where devices were inserted into the cranial vagina of 20 early (2 - 3 months) pregnant cows, with 20 contemporary controls. Cows were monitored monthly until calving, using an intravaginal endoscope and complete blood counts, plus assessment of acute phase serum proteins. With modifications following the initial field trial, the device was further tested in 80 mid to late gestation cows. Devices were monitored over 150 days for reception and location data utilizing Taggle™ terrestrial receivers mounted at heights of 12 - 15 metres. Parturition events and locations were confirmed by daily visual surveillance of calving paddocks. There was an 85% retention rate of the modified calf alert devices in pregnant cows, without any adverse effects on cow or calf. Modified devices functioned without interruption throughout the trial period and 83% of inserted devices provided locations throughout the data collection period. Modified devices detected calving date in 66% of cows, with calving location derived for 64% of cows. Precision of calving location was within 100 metres in a 150-hectare network, and 200 metres in a 1050-hectare network. We successfully developed and deployed a calf alert device that can be placed within the vagina of pregnant beef cattle for at least 6 months to provide calving time and location alerts by SMS or computer messaging. Ability to detect calving within 24 hours of actual calving date would enable neonatal calves to be monitored, thereby increasing the opportunity to identify, investigate, and address any calf losses.
Original languageEnglish
Pages449 (Clinical Theriogenology, Vol 11, No 3)
Number of pages1
Publication statusPublished - Sep 2019
EventSociety for Theriogenoloy and American College of Theriogenologists Annual Conference - The Westin Savannah Harbor , Savannah, United States
Duration: 24 Jul 201928 Sep 2019

Conference

ConferenceSociety for Theriogenoloy and American College of Theriogenologists Annual Conference
CountryUnited States
CitySavannah
Period24/07/1928/09/19

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calving
calves
monitoring
cows
field experimentation
vagina
parturition
endoscopes
acute phase proteins
prototypes
beef cattle
radio
blood proteins
morbidity
pods
necropsy
beef
adverse effects
herds
pastures

Grant Number

  • 0000101769

Cite this

Stephen, C., Menzies, D., Swain, D., Patison, K., Corbet, N., & Norman, S. (2019). Telemetric monitoring of calving using a novel calf alert device. 449 (Clinical Theriogenology, Vol 11, No 3). Abstract from Society for Theriogenoloy and American College of Theriogenologists Annual Conference , Savannah, United States.
Stephen, Cyril ; Menzies, Don ; Swain, David ; Patison, Kym ; Corbet, Nicholas ; Norman, Scott. / Telemetric monitoring of calving using a novel calf alert device. Abstract from Society for Theriogenoloy and American College of Theriogenologists Annual Conference , Savannah, United States.1 p.
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Stephen, C, Menzies, D, Swain, D, Patison, K, Corbet, N & Norman, S 2019, 'Telemetric monitoring of calving using a novel calf alert device' Society for Theriogenoloy and American College of Theriogenologists Annual Conference , Savannah, United States, 24/07/19 - 28/09/19, pp. 449 (Clinical Theriogenology, Vol 11, No 3).

Telemetric monitoring of calving using a novel calf alert device. / Stephen, Cyril; Menzies, Don; Swain, David; Patison, Kym; Corbet, Nicholas; Norman, Scott.

2019. 449 (Clinical Theriogenology, Vol 11, No 3) Abstract from Society for Theriogenoloy and American College of Theriogenologists Annual Conference , Savannah, United States.

Research output: Other contribution to conferenceAbstract

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T1 - Telemetric monitoring of calving using a novel calf alert device

AU - Stephen, Cyril

AU - Menzies, Don

AU - Swain, David

AU - Patison, Kym

AU - Corbet, Nicholas

AU - Norman, Scott

PY - 2019/9

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N2 - In extensive grazing systems, lack of methods to monitor calving has been an impediment to characterizing and managing calf losses. A device that could telemetrically detect time and location of a portion of parturition events would allow timely recording of calving-related data, increase opportunities to conduct necropsies and be useful to quantify and derive scientifically based conclusions for neonatal calf mortality and morbidity. Objective was to build and evaluate a telemetric calf alert device suitable for identification of the time and location of calving events in extensive beef production herds in northern Australia. A prototype device was selected from several preliminary designs, based on cow safety and 100% vaginal retention as tested in a 28-day field trial in 5 non-pregnant cows. The device was further developed incorporating a Taggle™ PCB (printed circuit board) and a battery (life of 2 years) within a cargo pod. Taggle™ location system consists of 3 components - a transmitter that outputs a low-power radio signal; a sensitive terrestrial receiver that detects the Taggle™ ping and its time of arrival; and a method of transmitting the time of ping arrival at each receiver to a central location server. When Taggle™ ping is detected by 3 or more receivers, the time difference of arrival of these signals is used to calculate the location of the transmitter. Device transmits signals every 15 minutes and can transmit to receivers up to 7 km away. Device was active from the time of intravaginal insertion, sending out attenuated signals detectable by receivers. At device expulsion during parturition, improved reception of the unattenuated signal allowed the timing and location of calving event to be transmitted. A field trial was conducted where devices were inserted into the cranial vagina of 20 early (2 - 3 months) pregnant cows, with 20 contemporary controls. Cows were monitored monthly until calving, using an intravaginal endoscope and complete blood counts, plus assessment of acute phase serum proteins. With modifications following the initial field trial, the device was further tested in 80 mid to late gestation cows. Devices were monitored over 150 days for reception and location data utilizing Taggle™ terrestrial receivers mounted at heights of 12 - 15 metres. Parturition events and locations were confirmed by daily visual surveillance of calving paddocks. There was an 85% retention rate of the modified calf alert devices in pregnant cows, without any adverse effects on cow or calf. Modified devices functioned without interruption throughout the trial period and 83% of inserted devices provided locations throughout the data collection period. Modified devices detected calving date in 66% of cows, with calving location derived for 64% of cows. Precision of calving location was within 100 metres in a 150-hectare network, and 200 metres in a 1050-hectare network. We successfully developed and deployed a calf alert device that can be placed within the vagina of pregnant beef cattle for at least 6 months to provide calving time and location alerts by SMS or computer messaging. Ability to detect calving within 24 hours of actual calving date would enable neonatal calves to be monitored, thereby increasing the opportunity to identify, investigate, and address any calf losses.

AB - In extensive grazing systems, lack of methods to monitor calving has been an impediment to characterizing and managing calf losses. A device that could telemetrically detect time and location of a portion of parturition events would allow timely recording of calving-related data, increase opportunities to conduct necropsies and be useful to quantify and derive scientifically based conclusions for neonatal calf mortality and morbidity. Objective was to build and evaluate a telemetric calf alert device suitable for identification of the time and location of calving events in extensive beef production herds in northern Australia. A prototype device was selected from several preliminary designs, based on cow safety and 100% vaginal retention as tested in a 28-day field trial in 5 non-pregnant cows. The device was further developed incorporating a Taggle™ PCB (printed circuit board) and a battery (life of 2 years) within a cargo pod. Taggle™ location system consists of 3 components - a transmitter that outputs a low-power radio signal; a sensitive terrestrial receiver that detects the Taggle™ ping and its time of arrival; and a method of transmitting the time of ping arrival at each receiver to a central location server. When Taggle™ ping is detected by 3 or more receivers, the time difference of arrival of these signals is used to calculate the location of the transmitter. Device transmits signals every 15 minutes and can transmit to receivers up to 7 km away. Device was active from the time of intravaginal insertion, sending out attenuated signals detectable by receivers. At device expulsion during parturition, improved reception of the unattenuated signal allowed the timing and location of calving event to be transmitted. A field trial was conducted where devices were inserted into the cranial vagina of 20 early (2 - 3 months) pregnant cows, with 20 contemporary controls. Cows were monitored monthly until calving, using an intravaginal endoscope and complete blood counts, plus assessment of acute phase serum proteins. With modifications following the initial field trial, the device was further tested in 80 mid to late gestation cows. Devices were monitored over 150 days for reception and location data utilizing Taggle™ terrestrial receivers mounted at heights of 12 - 15 metres. Parturition events and locations were confirmed by daily visual surveillance of calving paddocks. There was an 85% retention rate of the modified calf alert devices in pregnant cows, without any adverse effects on cow or calf. Modified devices functioned without interruption throughout the trial period and 83% of inserted devices provided locations throughout the data collection period. Modified devices detected calving date in 66% of cows, with calving location derived for 64% of cows. Precision of calving location was within 100 metres in a 150-hectare network, and 200 metres in a 1050-hectare network. We successfully developed and deployed a calf alert device that can be placed within the vagina of pregnant beef cattle for at least 6 months to provide calving time and location alerts by SMS or computer messaging. Ability to detect calving within 24 hours of actual calving date would enable neonatal calves to be monitored, thereby increasing the opportunity to identify, investigate, and address any calf losses.

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M3 - Abstract

SP - 449 (Clinical Theriogenology, Vol 11, No 3)

ER -

Stephen C, Menzies D, Swain D, Patison K, Corbet N, Norman S. Telemetric monitoring of calving using a novel calf alert device. 2019. Abstract from Society for Theriogenoloy and American College of Theriogenologists Annual Conference , Savannah, United States.