E3S Web Conf.
Volume 203, 2020Ecological and Biological Well-Being of Flora and Fauna (EBWFF-2020)
|Number of page(s)||8|
|Section||Veterinary Well-Being of Fauna|
|Published online||05 November 2020|
The State of Litter of Pigs in the Conditions of the Complex
1 Irkutsk Interregional Veterinary Laboratory, Russia
2 Far Eastern State Agrarian University, 86, Politeknicheskaya Str., Blagoveschensk, Russia
* Corresponding author: email@example.com
The state of litter of large white pigs in industrial conditions was studied. Embryonic mortality is higher during the first 30 days of littering (21.6%) – in the period of histotrophic feeding of fetuses – before the beginning of placental connection formation. whereas during the whole period of pregnancy it is 38.4%. In a number of sows at different periods of littering. the number of corpus luteum and the number of fetuses from the side of the corresponding fertile horn do not coincide. that which indicates the migration of embryos into contralateral horn in the early timing of pregnancy. Fetuses growth rate is higher by the 45-days pregnancy. In the litter of pigs there are normotrophic (full-fledged. large-fetused). hypotrophic (small-weight) and stillborn pigs. There is close inverse relationship (r = -0.98 between fertility and full-fledgeness of piglets в гнездеin the nest. wherein the number of hypotrophic and stillborn ones as the number of newborns in the litter increases has direct positive correlation (r = + 0.98). The more piglets in the litter. the fewer full-fledged ones. and on the contrary. the number of hypotrophic and stillborns is increasing.
© The Authors, published by EDP Sciences, 2020
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