Logix Small Stock

Logix Small Stock

The aim of Logix Small Stock is the holistic genetic improvement of economic production traits, while maintaining breed standards. The most significant trait to be improved is the net production rate within natural production environments. Shortening the production cycle while maintaining carcass quality is obviously also important. These traits have to be improved in animals with the desired conformation which conform to breed standards.

Structure of Logix Small Stock

Farm tests

  • Mating lists (optional): Matings, embryo flushings and AI info are recorded.
  • Birth notification and lambing data (compulsory): Lambing data measured by breeders are used to evaluate fertility. Births are recorded, as well as ease of lambing, number of lambs born alive and dead, and abortions.
  • Pre-weaning weights (between 25 –79 days - optional)
  • Weaning weights (between 80 – 149 days - compulsory): Weaning weights are used to calculate the growth rate of lambs, as well as the mothering ability and efficiency of ewes. All the weaning weights of a ewe are used to calculate the total weight weaned per ewe per production year. This measurement thus takes into account the quality of lambs as well.
  • Post weaning weight: between 150 – 364 days; Mature weight: older than 365 days. These weights are optional and are used to evaluate post-weaning growth rate, as well as the adaptability of young animals.
  • Traits measured on the ewe herd include: Total weight of lambs weaned /year (kg); Fertility (Ewe lambed of not); Multiple births (Number of lambs born / year); Lamb survival (Number of lambs weaned / year); Total weight of lambs born / productive years (kg) and Total weight of lambs weaned / productive years (kg).

Growth tests

  • Centralised ram growth tests (optional)
    This option allows animals from different environments to be tested under the same conditions after an adaptation period. Animals are fed individually at central ram test centres in order to record feed intake and calculate feed efficiency. Weights are also used to calculate growth rate.
  • Field ram tests (optional)
    Field ram tests accommodate rams from different breeders (and therefore flocks) to be tested together in one location. Usually feeding regimes are based on natural grazing conditions, but may differ according to the rules of a specific Field Ram Club. Weight gain are used as the parameter of desireability but other properties, such as scrotum curcumference and RTU measurements, can also be recorded.
  • Single herd ram growth tests (optional)
    Post-weaning growth rates are evaluated under controlled environments on a farm of a member or private organisation. The breeder determines the feeding regime, which can be intensive or extensive. After the evaluation, an objective selection tool can be determined so that their genetic potential can de determined. Body measurements and RTU evaluations can also be done.

Wool tests

Wool traits are tested under the same feeding and environmental conditions for a minimum of 180 days. Body weights and traits on the fleece are measured. The evaluated traits include 120-day weaning weight (kg), 12-month body weight (kg), fleece weight (kg), fibre diameter (μm), coefficient of fibre diameter variation, staple length (mm), crimp frequency, and clean fleece yield (%).

Requirements for participation in Logix Small Stock

Stud and commercial producers of meat and wool sheep, as well as goats, benefit from participation in production measurement. All animals should be identified and the recording of births are important, without which genetic evaluation is not possible and it is not possible to manage and select animals efficiently. A reliable sheep scale and basic handling facilities are needed for measurements.

Management reports

  • Administrative reports e.g. inspection lists.
  • Production and pedigree reports, e.g. ram and ewe progeny reports and three or five generation pedigrees.
  • Reproduction reports.
  • Production reports: three generation production / wool reports.
  • Production reports per test: fertility, groups reports, wool tests, ram growth tests.
  • Reports containing genetic information on the herd and individual animals. Breeding values (EBV) for wool and meat traits, as well as genetic trends.
  • Herd genetic reports.
  • Auction catalogues.
  • Breed averages.

Downloadable Documents

# Name Description
1. Guidelines for ram growth tests *.pdf formaat (996 kb)
2. Guidelines for ram growth tests with feed intake Microsoft Word *.doc format (15 kb)
3. Small stock guidelines for production *.pdf formaat (1.1 MB)
  Left click on the document name to open and Right click on the document name and choose Save Target as... to download the document.

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