Last update: April 2, 2012 07:46:49 AM E-mail Print

 

A PERFORMANCE TESTING SCHEME FOR ANGORA GOATS

G Erasmus 

 

At the last A G M of the Angora Goat Stud Breeders Society it was unanimously decided to make representations to the Department with the view to implementing a performance and progeny-testing scheme for Angora goats. A draft scheme, compiled by representatives of the Breeders' Society, the Mohair Growers Association, the Mohair Board and the Department was unanimously accepted. Mr Gert Erasmus, Officer in Charge of the Fleece Testing Centre, who chaired the committee responsible for the draft, outlined the envisaged scheme and the suggested procedures as follows:

 

1. PARTICULARS AT WEANING

The first shearing should preferably coincide with weaning. Three weeks will be the maximum period allowed between weaning and first shearing. After the kids have been shorn, they should be allowed a suitable period for grazing, after which they are kraaled overnight and their body weights recorded after sunrise the following day.

A form, on which the following information should be supplied, is then completed:

(1) Dam No. (A list of all ewes mated to be supplied); (2) Sire No and stud No; (3) Date of birth; (4) Sex of kid; (5) Weaning weight; (6) Remarks. A list of coded remarks will be supplied so that, for instance, if a kid is not weaned, the reason may be recorded.

This form serves as a. combination of mating list, birth notification and weaning particulars.

It will replace the kid return form currently in use and scheme members will be given extension of time until after weaning for submitting particulars.

 

2. SECOND SHEARING

At this shearing, fleece weights are recorded, fleece samples taken and the goats weighed for the second time.

The following information must then also be supplied on the information sheet provided:

(a) Present and previous shearing dates;

(b) Group number (where goats have received different treatment, each comparable group must be identified).

A separate information sheet must be completed for rams and ewes.

 

3. SUBJECTIVE EVALUATION

At inspection the inspector must score the following properties:

 

Body

Size; Head and horns: (a) Shape (b) Covering and softness

 

Fleece

Length; Density; Style; Character; Evenness of fleece; Freedom from kemp; Fineness and yolk.

 

General Appearance

Each property is scored from 0 to 5 as follows:

 

Ideal = 5; Very good = 4; Good = 3; Average = 2; Fair = 1; Cull = 0

 

The Scheme, therefore, has three input documents which must be forwarded to the Secretary of the Angora Goat Stud Breeders Society of South Africa.

 

4. ANALYSIS OF SAMPLES AND DATA

After the first input (after weaning) has been received, a file will be opened on the computer for every goat. Corrected weaning weights will be supplied to the breeder for use in preliminary culling. After receipt of the samples and second input form, the samples will be analysed for the following:

Clean yield percentage; Fibre diameter; Lock length

The full results will be sent to the breeder to aid him in his final selection.

The following annually updated reports will be furnished:

(a) Sire summary, giving the predicted breeding value of each sire used in respect of each recorded property.

(b) Ewe summary, giving the fertility index as well as the productivity index of each ewe with regard to mohair produced and total weight of kids weaned.

 

The subjective evaluation ratings will be recorded for incorporation in registration certificates issued by Stud Book and for research purposes.

 

Published

Karoo Regional Newsletter Winter