Data Collection

At the core of genetic improvement is the collection of data. While data quality is critical, quantity of data collected can sometimes overcome the limitations on data quality that inherently occur in farm and ranch operations. Along with weights and scores for economically relevant traits and their indicator traits, accurate identification of animals, parents, contemporary groups, and other important details (e.g., age) are essential.

Data quality can be impacted by several clearly identified factors. While completeness, timeliness, accuracy, and conformity are all essential, consistency is often the least understood and most overlooked consideration for quality data. Collecting, recording, manipulating and processing data using consistent procedures at both the farm and association levels is essential to maintaining quality data.

Beef cattle identification system

In order to keep all data collected associated with an individual animal an effective beef cattle identification system is essential. [beef_cattle_identification_system Standards have been developed] for identification methods that ensure unique and accurate identification of animals during the transmission and processing of data. Because of the number of animals processed in National Cattle Evaluations programs (NCE) is routinely in the millions, it is not practical to routinely use registration number information for on-farm data collection. Standards for ear tagging and on-farm electronic identification have also been implemented. In addition, recording of animal identification is closely associated with the collection of genomic information.

Whole Herd Reporting

Historically, many beef breed genetic evaluations were based on progeny weaned and/or registered and did not require that data be recorded from females that failed to reproduce or whose progeny were not registered.  By contrast, inventory based Whole Herd Reporting (WHR) requires collection of annual production and performance records on all cattle within a herd.

The objective of WHR is to accumulate reproductive and performance data on all animals in a breed.  It does not, however, seek to control which animals will be registered. That remains a decision of individual breeders.  With WHR, performance records (or disposal codes) are required on all calves produced by each breeder, but whether any or all of those calves receive registration papers is the breeder’s decision.

The following procedures and definitions are recommended for an efficient and effective inventory based Whole Herd Reporting system,

Heifer exposure inventory

To collect reproductive data on potential replacement heifers, a yearling heifer exposure inventory must be produced.  This inventory would typically be sent in May for spring born heifers and in November for fall born heifers. On the inventory, producers should indicate breeding season start and end dates, individual exposure status, management group, and disposal information.  Differences among management groups in post-yearling feeding, management, or mating practices should be recorded.

Breeding herd inventory

An annual inventory will be sent from the breed association to the breeder in December or early January for spring calving herds (January 1st – June 30th) and in June for fall calving herds (July 1st – December 31st).  Breeders will identify those animals to be removed from inventory, add new animals of breeding age not found on the inventory report (e.g., new purchases), and return the completed inventory report to the breed association national office.  These inventories will list all animals the breeder will be collecting production data on for the next 12 months.

The two-inventory system described above is recommended over single inventory systems that encompass both calving seasons. To identify which cattle will be expected to calve in the coming year, the two-inventory times, spring and fall, allow breeding inventories to be determined when cows are at the same relative stage of production – regardless of calving season. The inventory times, December to early January for spring calving and June for fall calving, are desirable because they follow weaning and pregnancy testing but precede the peak of the calving season.  This allows both reproduction and production to be tracked in a uniform manner.

Breeders must complete and report herd inventories to the association on a set schedule. The objective is to record performance data from the entire herd.  Therefore, the fee assessment structure must encourage complete and unbiased reporting of data. Charging assessment fees and/or penalties for non-reporting of data may differ from one association to the next.  With inventory based WHR, consideration should be given to an inventory-based fee assessment system because: 1) it removes all financial disincentives to submitting complete production and performance data; 2) it encourages producers to maintain an accurate active inventory; and 3) it promotes the registration and transfer of seedstock destined for use in commercial production.

Performance record requirements

During each 12-month period, one of the following must be recorded for each cow on inventory:

A calf record, including a disposal code for calves that die before weaning.

A disposal code for the cow.

A reason code for the cow's failure to produce a calf (e.g., open, embryo transfer program, moved to the next calving season).

No progeny report

Prior to inactivation, breed associations should send producers a "no progeny" report listing all cows that have not met reporting requirements. This would allow the producer to complete reporting on any cattle that might have been missed.

Sample annual schedule for Whole Herd Reporting

Spring calving		Description						Fall calving
******************************************************************************
Dec. or Jan. 1		Association sends out preliminary 			June 1
			herd inventory.

February		Member returns the inventory to the			July
			Association with all changes.

March 15		Association sends “No Progeny Report” on		August 15
			females missing WHR requirements.

April 15		“No Progeny Report” due back to Association. 	September 15

May			Association runs inactivation program.		October

July 			Association bills for annual WHR 			December
			assessments based on herd inventory.

May 15		Association sends preliminary inventory		November 15
 			for heifer exposure information.

August 1		Association sends pre-listed weaning		March 1
			worksheets.	

August 15		Member returns heifer exposure inventory		February 15
			with all exposure and disposal information.

November		WHR assessment must be paid in full.	 	May
******************************************************************************

Data to be recorded on individual cows

Breeding dates. Record dates of artificial insemination services or of observed natural matings. For pasture matings, record natural service exposure dates (start and end of breeding season).

Pregnancy status. Prior to determining a breeding herd inventory for the coming year, cows should be pregnancy tested by trained personnel.

Calving date. Each calf’s birth date is also its dam’s date of calving. As a trait of the cow, this date may be used to calculate gestation length, days to rebreeding, and calving interval.

Calving difficulty or ease. Record with the following scores:

1 – No difficulty, no assistance 2 – Minor difficulty, some assistance 3 – Major difficulty, usually mechanical assistance 4 – Caesarian section or other surgery 5 – Abnormal presentation

From these data, expected progeny differences for calving ease-direct and calving ease-maternal can be calculated. Scores of 5 should be excluded from such evaluations, because abnormal presentations do not appear to be heritable either as a trait of the calf or of the dam.

Disposal codes: Birth to weaning.

1 – Stillborn/full term 2 – Died at birth - defect 3 – Died at birth - other 4 – Born alive, died before weaning - disease 5 – Born alive, died before weaning - other

Disposal codes: Weaning to two years of age.

10 – Died after weaning – disease 11 – Died after weaning – other 12 – Culled – feet and legs 13 – Culled – performance 14 – Culled – temperament 15 – Sold exposed – open 16 – Sold exposed – pregnant

Disposal codes: Mature cows and bulls.