caa a22 4500 386320500 CHVBK 20180307111624.0 cr unu---uuuuu 161130e198812 xx s 000 0 eng 10.1017/S0003356100003640 doi S0003356100003640 pii (NATIONALLICENCE)cambridge-10.1017/S0003356100003640 Artificial insemination of farmed fallow deer (Dama dama): fixed-time insemination at a synchronized oestrus [Elektronische Daten] Two trials were conducted in 1986 on artificial insemination of female fallow deer at fixed intervals from the cessation of oestrous synchronization treatment. Semen had been collected previously from mature bucks by electroejaculation and extended in sodium citrate/egg yolk diluent. In the first trial involving a comparison of the fertilization rates of fresh and frozen-thawed semen delivered intravaginally, 57 does each received a single intravaginal progesterone-releasing device (CIDRtype S, Carter Holt Harvey Plastic Products Group Ltd, Hamilton, NZ) for a 14-day period early in the 1986 breeding season. All does were inseminated intravaginally with either fresh (no. = 26) or frozenthawed (no. = 31) semen (85 × 106 motile spermatozoa per inseminate) at 48 h after CIDR removal. The apparent conception rates for the two types of semen were 65·4% and 64·5% respectively (P > 0·1) and the actual fawning rates were 500% and 48·4% respectively (P > 0·1). In the second trial involving an investigation of the feasibility of laparoscopic intrauterine insemination, 55 does were synchronized as for the first trial. At 56 to 58 h from CIDR removal, the does were anaesthetized and laparoscopically inseminated with frozen-thawed semen (85 × 106 motile spermatozoa per animal) by direct injection into both uterine horns. Anaesthesia was reversed immediately following artificial insemination. The apparent conception rate was 47·3% and the actual fawning rate was 41·8%. Data from both trials indicate that reasonable fawning rates can be obtained for artificially inseminated fallow deer. Between 11 and 25% of does expected to fawn did not and this may represent embryonic mortality attributable to the method of oestrus/ovulation synchronization. Copyright © British Society of Animal Science 1988 Asher G. W. Ruakura Animal Research Station, Ministry of Agriculture and Fisheries, Private Bag, Hamilton, New Zealand Adam J. L. Ruakura Animal Research Station, Ministry of Agriculture and Fisheries, Private Bag, Hamilton, New Zealand James R. W. Ruakura Animal Research Station, Ministry of Agriculture and Fisheries, Private Bag, Hamilton, New Zealand Barnes D. Ruakura Animal Research Station, Ministry of Agriculture and Fisheries, Private Bag, Hamilton, New Zealand Animal Production Cambridge University Press 47/3(1988-12), 487-492 0003-3561 47:3<487 1988 47 ASC https://doi.org/10.1017/S0003356100003640 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1017/S0003356100003640 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Asher G. W. Ruakura Animal Research Station, Ministry of Agriculture and Fisheries, Private Bag, Hamilton, New Zealand NATIONALLICENCE 700 1- Adam J. L. Ruakura Animal Research Station, Ministry of Agriculture and Fisheries, Private Bag, Hamilton, New Zealand NATIONALLICENCE 700 1- James R. W. Ruakura Animal Research Station, Ministry of Agriculture and Fisheries, Private Bag, Hamilton, New Zealand NATIONALLICENCE 700 1- Barnes D. Ruakura Animal Research Station, Ministry of Agriculture and Fisheries, Private Bag, Hamilton, New Zealand NATIONALLICENCE 773 0- Animal Production Cambridge University Press 47/3(1988-12), 487-492 0003-3561 47:3<487 1988 47 ASC CC0 http://creativecommons.org/publicdomain/zero/1.0 nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-cambridge