Ear Notching for Animal Identification

Ear Notching for Animal Identification

Read the information provided and answer the questions below. This worksheet will assess your understanding of the ear notching identification system in livestock.

Ear notching is a permanent and widely used method for identifying individual animals, particularly hogs, within a herd. This system provides a unique identification number for each animal, which is crucial for accurate record-keeping, genetic tracking, and efficient herd management. The system involves making small V-shaped cuts, or 'notches', in specific locations on the pig's ears. Each location corresponds to a numerical value, and the sum of the values of the notches in a particular ear indicates either the litter number or the individual pig number.

In a common ear notching system for pigs:

The pig's RIGHT ear is used for the LITTER number.

The pig's LEFT ear is used for the INDIVIDUAL PIG number within that litter.

Each ear is divided into five sections, with each section representing a specific numerical value.

For the RIGHT (LITTER) ear:

Tip of the ear: 1

Lower edge, near head: 3

Lower edge, middle: 9

Upper edge, near head: 27

Upper edge, middle: 81 (often reserved for large litter numbers, or not used in simpler systems)

For the LEFT (INDIVIDUAL PIG) ear:

Tip of the ear: 1

Lower edge, near head: 3

Lower edge, middle: 9

Upper edge, near head: 27

Upper edge, middle: 81 (often not used, as individual pig numbers rarely exceed 9-12)

The sum of the values of the notches in each ear gives the respective number. For example, a pig with a notch in the tip of its right ear (value 1) and a notch in the lower edge near its head (value 3) would have a litter number of 1+3=4. If its left ear had a notch in the tip (value 1), its individual number would be 1. Thus, the pig's identification would be 4-1.

1. In the ear notching system for pigs, which ear is typically used to indicate the LITTER number?

2. What is the primary purpose of using ear notching in animal husbandry?

3. The pig's   ear is used for the individual pig number within a litter.

4. Ear notching is considered a   method of identification.

5. In the right ear, a notch in the tip of the ear typically represents the numerical value of  .

6. The numerical value '81' is commonly used for individual pig numbers in the left ear.

7. Ear notching helps in tracking genetic lineage and managing breeding programs.

8. A pig has notches in the following locations on its RIGHT ear: tip (value 1) and lower edge near head (value 3). What is the litter number for this pig?

9. Explain two advantages of using ear notching as an identification method in livestock.