Przeglądaj wg Autor "Olszewski, Andrzej"

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    Use of Pedometers to Analyse 24-Hour Activity and Fertility of Limousin Cows
    (Wydawnictwo Uczelniane Zachodniopomorskiego Uniwersytetu Technologicznego w Szczecinie, 2015) Wójcik, Piotr; Olszewski, Andrzej; Department of Animal Genetics and Breeding, National Research Institute of Animal Production, Balice, Poland; Expeimental Station of the National Research Institute of Animal Production in Kołbacz Ltd., Stare Czarnowo, Poland
    Limousin cows and heifers (10 animals per group) were kept on deep litter with access to an outdoor area. The study was conducted in January and February using Israeli (AfiAct) and Japanese (Gyuho) activity monitoring systems. Twenty-four-hour activity patterns, resting frequency, average amount of time spent resting per lying bout were analysed, and the mean indicator of distress was estimated. The cows and heifers showed lowest 24-hour activity during the night hours (between 0:00 am and 5:00 am), and day-time activity was almost twice as high as night-time activity. With increased 24-hour activity in relation to cows, heifers were characterized by higher resting frequency and shorter amount of time spent resting per lying bout. Greater stressfulness was observed during the morning measurement in both groups. Estrus detection efficiency averaged 85% for both systems (84% for heifers and 85% for cows). Both monitoring systems missed 1.5 estruses across the whole herd.