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Conception rates in European fallow does ( Dama dama dama ) following intrauterine insemination with frozen‐thawed semen from Mesopotamian fallow ( Dama dama mesopotamica ) and crossbred ( Dama dama dama x Dama dama mesopotamica ) bucks
Author(s) -
MYLREA GE,
EVANS G.,
ENGLISH AW
Publication year - 1991
Publication title -
australian veterinary journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.382
H-Index - 59
eISSN - 1751-0813
pISSN - 0005-0423
DOI - 10.1111/j.1751-0813.1991.tb03258.x
Subject(s) - semen , insemination , biology , crossbreed , artificial insemination , straw , andrology , sperm , zoology , medicine , anatomy , pregnancy , agronomy , botany , genetics
SUMMARY Ninety eight parous fallow does received laparoscopic intrauterine insemination of frozen‐thawed semen at one of 2 fixed intervals following oestrus synchronisation treatment. Semen was collected from a Mesopotamian ( Dama dama mesopotamica ) and a crossbred (F1) ( Dama dama dama x Dama dama mesopotamica ) fallow buck. Does were inseminated at either 56 or 66 hours after the removal of an intravaginal controlled internal drug releasing device. Eighty eight does received a single straw of frozen‐thawed semen containing a total of 50 times 10 6 spermatozoa, while the remaining 10 received split straws containing 25 times 10 6 spermatozoa. Overall, the use of F1 semen containing 50 times 10 6 spermatozoa resulted in a 68% (17/25) conception rate compared with the Mesopotamian semen, which resulted in a 41% (26/63) conception rate. Conceptions were also achieved using 25 times 10 6 spermatozoa of either Mesopotamian or F1 semen (3/8 versus 2/2, respectively). Overall, the conception rate was higher for F1 than Mesopotamian semen (P<0.025) and there was a significant interaction with time of insemination (P<0.05); for F1 semen there was no difference in conception rate at the 2 insemination times, but for Mesopotamian semen conception was significantly higher (P<0.005) following insemination at 66 hours than at 56 hours.