20.500.12556/DKUM-74057 Vpliv odvračal na obnašanje, operjenost in poškodbe grodnice pri kokoših nesnicah Effects of Repellents on Behaviour, Feather Condition and Keel Bone Damage of Laying Hens Namen raziskave je bil ovrednotiti uporabnost odvračal pri kokoših nesnicah za preprečevanje kljuvanja perja in kanibalizma. Uporabili smo dve odvračali iz patenta US2967128 A, katerih poglavitna aktivna snov je bil dimetil antranilat. Vsako od odvračal smo z razprševanjem nanašali na skupino 60 kokoši prelux-R uhlevljenih v obogatene kletke. Raziskava je potekala skozi celoleten proizvodni cikel kokoši v komercialnih pogojih reje. Poudarek smo dali vplivu odvračal na počutje kokoši, pri čemer smo obravnavali njihovo obnašanje, operjenost in poškodbe grodnice. Spremljali smo tudi proizvodne lastnosti in pogin. Ugotovili smo, da uporabljeni odvračali nimata vpliva na obnašanje kokoši. Kljub dejstvu, da v skupinah z odvračali nismo ugotovili več kljuvanja perja, so bile kokoši v teh skupinah, v primerjavi s kontrolno skupino, slabše operjene. Nezmanjšana podvrženost poškodbam grodnice je logična posledica dejstva, da odvračali nista doprinesli k boljši operjenosti kokoši. V nesnosti in porabi krme med kokošmi, na katere smo nanesli odvračali ter med kokošmi v kontrolni skupini, nismo ugotovili statistično značilnih razlik. Uporabljeni odvračali nista pokazali pozitivnega učinka na počutje kokoši nesnic, zato njuno uporabo v komercialne namene odsvetujemo. The purpose of this study was to evaluate the usefulness of repellents when it comes to the prevention of feather pecking and cannibalism in laying hens. We used two repellents from the US2967128 A patent, both of which had dimethyl anthranilate as the major active substance. Each of the two repellents were periodically sprayed on a group of 60 Slovenian provenance Prelux-R hens, housed in furnished cages. The study was carried out in a commercial setting throughout a one-year production cycle of hens. The main objective of the study was to investigate the effects of the repellents on the hens’ welfare, whereby we monitored their behaviour, feather condition and keel bone damage. In addition, we also monitored the production characteristics and mortality. We found the repellents to have no effect on the behaviour of hens. Despite the fact that we did not find more feather pecking in the repellent-treated groups, these hens had poorer plumage condition compared to the hens from the control group. We did not find less keel bone damage in the repellent treated hens. This is a logical consequence of the repellents not attributing to a better plumage condition. We found no statistically significant differences in the laying performance and feed consumption between the repellent treated hens and the hens from the control group. The two repellents used had no positive impact on the hens’ welfare, thereby we advise against commercial use. kljuvanje perja / kanibalizem / počutje živali feather pecking / cannibalism / animal welfare true true false Slovenski jezik Angleški jezik Magistrsko delo/naloga 2019-07-30 12:22:58 2019-08-30 11:55:19 2022-08-10 05:53:05 2019-09-04 03:12:15 2019 0 Maribor 0 0000-00-00 NiDoloceno NiDoloceno NiDoloceno 0000-00-00 0000-00-00 0000-00-00 URN:SI:UM:DK:Q4LVUSKF MAG_Sraj_Uros_2019.pdf MAG_Sraj_Uros_2019.pdf 1 A6DB5B62F33CA144007D8AC387B3BE7D 6ea3a34c6bbbcfb416a07d6236815cfa4c0a2d91e0413b54725e492c84b5a66f d4e2915c-7c10-11eb-bb7a-00155d0001ca 20.500.12556/dkum/244861e3-a62f-470a-a4e3-26989e20321c https://dk.um.si/Dokument.php?lang=slv&id=136067 Fakulteta za kmetijstvo in biosistemske vede 0 0 0