Untersuchungen zum Futteraufnahmeverhalten ad libitum gefütterter tragender Sauen in Gruppenhaltung an Rohrautomaten

摘要

Title of the paper: Investigations took place in 3 farms with group sizes of 8 to 32 sows and ad libitum feeding at tube feeders withenergy reduced feed (9.3 to 9.6 MJ ME/kg) using unmolassed sugar beet chips (10 %), straw meal (25 %) respin ration. Behavioural observations have been made with infrared video technique and time lapse videorecording always during 24 hours. Individual duration of staying at trough in 24 hours and percentage of timefeeding places were used by different number of sows per hour during 24 hours were analysed byQBSERVER/Video-Tape-Anatysis-System.Large individual differences in duration of staying at trough in 24 hours occurred between sows of a group withmeans from 1.8 to 18.0 % although all sows had free access to always available food. Behavioural investigationshave shown that several sows did not come to trough over 24 hours without showing clinical signs of a diseaseAt the same time this is a hint at the problem of disease control of ad lib fed sows especially in large groupsAnalysing the percentage of time feeding places were used by different number of sows a biphasic dynamics offeed intake behaviour of ad lib fed sows was found with a peak in the morning (7 to 10 a.m.) and a more distinctpeak in the afternoon (3 to 7 p.m.).