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For 293 ejaculates, semen volume averaged 1.04 ml, sperm concentration (X 106/ mu l) 1.69, sperm motility 57.5%, methylene blue reduction time 5.1 min, the percentage of abnormal spermatozoa 18.0, and pH 7.1. Insemination with 0.05 or 0.10 ml semen at 3- to 4-day intervals resulted in egg fertility ...

Schramm, G.-P.
Monatshefte fur Veterinarmedizin, 1982, 37, 15, pp 576-578

For 50 ducks inseminated at 3- to 4-day intervals with 0.05 or 0.10 ml undiluted semen, 0.10 or 0.20 ml semen diluted with a citrate diluent, or 0.10 or 0.20 ml semen diluted with a glutamate diluent, egg fertility was 86.7, 87.2, 87.0, 88.3, 87.6 and 85.9% resp. vs. 70.6% for naturally mated...

Schramm, G.-P.; Hermerschmidt, G.; Hahnel, K.; Seibert, I.; Schnaeske, B.
Tierzucht, 1982, 36, 1, pp 40-41