Vie CONG. INTERN. REPROD. ANIM. INSEM. ARTIF, PARIS, 1968, VOL. |l

ability may be better advised not to carry out their own inseminationsa
The efficiency of the ‘'semen delivery' service would be enhanced if
oestrous detection could be improved and possibly also by the use of
disposable insemination equipment. The possible advantages of using
a double insemination technique to improve results are also being
investigated.

TABLE "COMPARISON OF 'INSEMINATOR' (I) AND 'SEMEN DELIVERY'
SERVICES" 1965 - 1967

PERIOD* SERVICE INSEMINATIONS RESULTS FARROWING AVERAGE LITTER

 

KNOWN  RATE % SIZE

¢ I 317 313 72.5 10.2
SD 248 193 49.7 10:%

: I 463 459 70.6 10.1
SD 534 467 46.0 9.9

I 503 490 67.1 10.6

5 SD 680 545 49.0 9.7
1 591 584 70.9 10.0

4 SD 1999 1588 51.8 9.5
g I 785 758 69.5 10.5
SD 3307 2269 50,9 9.6

I 2659 2604 69.9 10.3

TOTAL g 6768 5062 50.5 9.6

 

* Periods- 1 - 7 months ended 31.12.65 4 - 6 months ended 30.6.67
2 - 6 momths ended 30.6.66 5 - 6 months ended 31.12.67
3 - 6 months ended 31.12.66

REFERENCES

Holt, A.F. (1959) Vet. Rec. J1. 184-187.
Madden, D.H.L. (1959) Vet. Rec. J1l. 227-234.

Melrose, D.R. and O'Hagan, C. (1961) Proc. IVth Int. Congr. Anim,
Reprod. (The Hague) 4. 855-859.

Report (1967) 10th Ann.Rep, Pig Ind. Dev. Auth. p.14 London 1967,

1089