Journal of Food, Agriculture and Environment

Breeding season influence on sows gestation loss 

Author(s):

Ioan Petroman, Ramona Caliopi Untaru, Diana Marin

Recieved Date: 2012-11-03, Accepted Date: 2013-04-20

Abstract:

The aim of this study was to determine the pregnancy loss of F1 hybrid sows, and Large White x Landrace, exploited in intensive system. After the artificial insemination was performed until 28 days of pregnancy, animals were housed in individual pens, from 29 until 112 days, the animals were housed in different size group pens. We calculated the pregnancy losses at 28, 56 and 112 days (before transfering the pregnant animals in farrowing crates). Early and accurate identification of pregnancy in sows and gilts was performed to improve breeding efficiency. Pregnancy diagnosis was performed by detecting the heat returns after artificial insemination and by using ultrasound. The results were analysed according to the season when the artificial insemination was performed. The best results (higher conception rate) were recorded for animals inseminated in March; the loss of pregnancy from 28 to 56 days having an average value of 1.93 ± 0.13, followed by the animals inseminated in April, with 2.02 ± 1.02, and animals inseminated in May that have lost 2.58 ± 2.17. For the period from 56 days after the artificial insemination until farrowing, depending on the month in which the artificial insemination was made, losses ranged from 1.73 ± 0.83 to 3.41 ± 1.66, as determined by rebreeds, culls and mortality. The largest losses were recorded for animals artificially inseminated in May (3.18 ± 1.58), followed by December (3.07 ± 2.00) and January (3.41 ± 1.66). We presume that pregnancy losses can be determined by the high summer temperatures that lead to an increase of the embryo and fetal mortality. 

Keywords:

Intensive exploitation, sows, pregnancy, sexual cycles, influence, season, artificially insemination, loss, rebreeds, culls, mortality

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Journal: Journal of Food, Agriculture and Environment
Year: 2013
Volume: 11
Issue: 2
Category: Agriculture
Pages: 305-307

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