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.: Home > Animal Science Papers and Reports > 2004 > Volume 22 Number 3 > Ireneusz Artur Malecki**, Graeme Bruce Martin

Artificial insemination in the emu (Dromaius novaehollandiae): effects of numbers of spermatozoa and time of insemination on the duration of the fertile period*

Ireneusz Artur Malecki**, Graeme Bruce Martin
School of Animal Biology (M085), Faculty of Natural and Agricultural Sciences The University of Western Australia, Crawley, WA 6009, Australia
Abstract :

In emus, the duration of the fertile period was measured following a single artificial insemination
(AI) and investigated the effect of time of AI in the egg cycle on the duration of the fertile period.
Semen was collected by artificial cloaca, pooled and used undiluted for AI within 30 minutes. For
insemination, a female was followed until she assumed the voluntary crouch. A speculum was then
inserted into the cloaca and an insemination straw introduced into the vagina to a depth of 1-2 cm, and semen deposited. Following a single insemination with 100, 200 or 400 million spermatozoa, female emus laid fertilized eggs for 10.0±0.4, 12.0±0.9, and 15.0±0.6 days. When 400 million spermatozoa were used for insemination on Day 1, 2 or 3 of the oviposition cycle, the duration of the fertile period appeared to change in a day-dependent manner. After AI on Day 1, female emus laid fertilized eggs for 15.8±1.1 days, after AI on Day 2 for 12.5±2.2 days, and after AI on Day 3 for 10.0±1.5 days. The results suggest that female emus need to be inseminated the day after oviposition to maximize the duration of their fertile period.

Keywords :
artificial insemination / emu / fertility / oviposition / ratitae / sperm storage

Date Deposited : 11 Aug 2011 10:36

Last Modified : 11 Aug 2011 10:36

Official URL: http://www.ighz.edu.pl/

Volume 22, Number 3, - 2004

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