20.500.12556/DKUM-75251 Vpliv zgodnje socializacije pujskov na stopnjo poodstavitvene agresije Effect of early piglet socialisation on the degree of weaning aggression Cilj raziskave je bil ugotoviti vpliv zgodnje socializacije pujskov iz različnih gnezd na stopnjo agresije v poodstavitvenem obdobju. V času laktacije so bili pujski razdeljeni v dve skupini: S − skupinska reja (možnost prehajanja med boksi) in I − individualna reja (klasičen porodni boks). Poskus je potekal v 4 ponovitvah, v raziskovalnem hlevu za prašičerejo (FKBV), od februarja 2017 do maja 2018. V proučevanje je bilo vključenih skupno 143 pujskov. Na dan odstavitve so bili pujski stehtani, označeni ter odstavljeni v drugi boks. Opazovanje obnašanja pujskov je bilo opravljeno preko videoposnetkov. Proučevanih je bilo osem različnih oblik interakcij (prerivanje, grizenje repa, grizenje glave/ušes, grizenje po telesu, »pasji ugriz« in naskakovanje). Te smo analizirali med 1. in 8. dnem po odstavitvi v času med 7. in 15. uro. Rezultati so pokazali, da je največ agresivnih interakcij med osebki nasprotnih spolov (51 %), najmanj pa med osebki ženskega spola (17 %). Pujski, udeleženi v agresivnih interakcijah, so imeli minimalne razlike v starosti (63 % − razlika v starosti 0) ter v telesni masi (64 % − največ 2 kg razlike). V 74 % agresivnih interakcij se je posamezen par pojavil le enkrat v opazovanem obdobju. V skupini I je bil pujsek udeležen v 3,7 v skupini S le v 1,9 bojih. V skupini S je bila stopnja agresije značilno (p = 0,001) nižja 0,038 v primerjavi z I skupino 0,072. Skupinski sistem reje, ki omogoča zgodnjo socializacijo pujskov v času laktacije, ima pozitiven vpliv na zmanjšanje agresivnega obnašanja pujskov po tvorjenju novih skupin v poodstavitvenem obdobju. The aim of the study was to determine the effect of early piglet socialization on the degree of weaning aggression. During lactation, piglets were divided into two groups: S-group lactation system (possibility of passing between pens) and I-individual housing system (standard farrowing crate). The study was carried out with 4 replicates at a research pig farm (at FKBV) from February 2017 to May 2018. A total of 143 piglets were included. At weaning, all piglets were weighed, marked, and reallocated. Aggressive interactions were analysed with the aid of video technology. We studied eight different forms of aggressive interaction (head thrust, tail biting, head/ear biting, body biting, "dog bite" and mounting). Videos were analysed between the 1st and 8th day after weaning, between 7am and 3pm. The results revealed a high frequency of aggressive interactions between male-to-female (51 %) and less female-to-female fights (17 %). The most fights occurred between piglets with the minimal difference in age (63 %, difference in age is 0) and in body weight (64 %, maximum 2 kg of difference). In 74 % of aggressive interactions, an exact combination of two piglets appeared only once in the observed period. In group I, we recorded 3,7 fights per piglet, but in group S only 1,9 fights per piglet. The degree of aggression was significant lower (p = 0.001) in-group S (0.038) compared to group I (0.072). The results thus indicate that group housing during lactation, which enables an early socialisation, has a positive effect on reducing aggressive behaviour when forming new groups at weaning. pujski / skupinska reja / odstavitev / pozitiven vpliv / poodstavitvena agresija piglet / group lactation / weaning / positive impact / post-weaning aggression true true false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2019-10-03 16:18:08 2019-10-18 11:13:19 2022-08-09 11:06:28 2019-10-19 03:16:09 2019 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 URN:SI:UM:DK:I2O8NKIW MAG_Pacnik_Urska_2019.pdf MAG_Pacnik_Urska_2019.pdf 1 F54069937E379A434C3D430BDEA641E3 22f1036d5fe1bb6edaaad3df3a0557be46574cbe74c180ffced20a1c19a593c1 18d1ee4f-7c11-11eb-bb7a-00155d0001ca 20.500.12556/dkum/8ab131a9-0b63-4efb-b6f6-5183c62e7681 https://dk.um.si/Dokument.php?lang=slv&id=139128 Fakulteta za kmetijstvo in biosistemske vede 0 0 0