Factors affecting reproductive performance of white-tailed deer subjected to fixed-time artificial insemination or natural mating.
Reprod Fertil Dev
; 25(3): 581-6, 2013.
Article
in En
| MEDLINE
| ID: mdl-23464502
ABSTRACT
The objectives of this study were to examine the effects of several factors affecting fawning rate, litter size, litter weight and neonatal fawn mortality in white-tailed deer inseminated either transcervically or by means of laparoscopy. Oestrus synchronisation with a controlled internal drug release (CIDR)-based protocol and fixed-time artificial insemination (FTAI) was conducted in 130 white-tailed deer (Odocoileus virginianus texanus) during three reproductive seasons (2007-2009; 271 services) in a game-hunting ranch in a hot-arid environment (26°4' N, 101°25' W). Ninety additional non-treated does were exposed to bucks for natural mating. Fawning rate did not differ between AI methods (40.0 vs 45.0% for transcervical and laparoscopic AI, respectively). Overall fawning rate (proportion of all does fawning after FTAI and a subsequent period of buck exposure) did not differ between transcervical (89.5%), laparoscopic (80.3%) or natural (88.9%) insemination. Litter size per fawning doe was higher (P<0.05) in naturally-served does (1.65±0.48) than in transcervically-inseminated does (1.40±0.51) or in laparoscopically-inseminated does (1.48±0.50). The main conclusion was that no enhancement of fawning rate or litter size occurred as a result of intrauterine deposition of semen by laparoscopy compared with the transcervical insemination technique.
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Main subject:
Reproduction
/
Sexual Behavior, Animal
/
Deer
/
Insemination, Artificial
Limits:
Animals
/
Pregnancy
Country/Region as subject:
Mexico
Language:
En
Journal:
Reprod Fertil Dev
Journal subject:
MEDICINA REPRODUTIVA
Year:
2013
Type:
Article
Affiliation country:
Mexico