Jersey Breed Facts
Performance trends are a very useful tool for breed societies,
individual breeders, educational establishments, students and
for anyone involved in breed promotion or simply wanting to
compare and benchmark their own herd and animal performances
against their contemporaries.
The Centre for Dairy Information is able draw together milk
records from all UK sources, along with breed society registration
data, to produce a unique guide to the productive performance
of registered animals from each individual breed. Here we get
an up to date overview of UK Jersey performance.
The statistics produced in this document are provided by Henry
Richardson of the CDI and were derived from lactation records
collected by UK Milk Recording Organisations and collated by
CDI with the assistance of the following:
Cattle Information Service (CIS)
Isle of Man Dept. of Agriculture
National Milk Records plc
Royal Jersey Association of Agriculture and Horticulture
States Dept of Agriculture for Guernsey (via NMR)
Dairy Farmers (Northern Ireland)
Together with each of the
respective CDI partner Breed Societies.
There are stringent protocols in place to the validity and
accuracy of data used to make these breed comparisons. To be
selected for inclusion in these analyses, lactation records
must meet selected qualifying criteria and have been recorded
in conformance with ICAR agreements on recording practice.
In particular, each lactation must:
have a minimum of 5 genuine sample test results,
analysed for constituents.
have lasted a minimum of 200 days
have ended the lactation or completed the 305th
day within the 12 months
up to 30th September of the year quoted
include product on
up to and including the 305th day of lactation, but
Only those lactations with a valid Cell Count
result are included in the
To be included in Calving Interval analyses,
an animal must have at least two authentic calvings with
consecutive lactation numbers recorded, i.e. system estimated
or automatically generated calving dates are excluded.
Table 1: Lactation Performance Trends for registered animals
The change over time reveals how much of the progress in genetic
potential, nutrition and management is being achieved in practice.
The number of Lactations shows how many full, qualifying lactations
were completed during the year and used in the analysis of
Milk, Fat and Protein results.
Calving Interval and Cell Count
statistics will use slightly fewer results, depending on the
number of animals who recorded a valid score. The count therefore
does not equate to the number of animals registered, nor include
those who may have ended their lactation below 200 days. It
does however give a consistent guide to the trend in lactations
recorded each year.
All breeds lactation yields have bounced
back up again by around 200kg in 2014, this follows a dip in
2013 caused by two poor forage seasons and the Schmallenberg
virus sweeping through South England and the Midlands. So 2014
continues the general trend from 2010-2013 when yields have
Breed Performance Statiscics 2015