Group sizes effects on growth performance and behavioural characteristics in Korean native calves
Effects of group size on performance and behavioural characteristics in Hanwoo calves including heifers (BW = 140.7 ± 3.8 kg, 8 ± 0.5 month) and steers (BW = 167.2 ± 3.4 kg, 8 ± 0.6 month) were evaluated. Fifty-four calves (27 steers and 27 heifers) were assigned to three group sizes, with either 4...
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doaj-4c3d80ca54e943f4b85e21eb730076e62020-11-25T03:52:43ZengTaylor & Francis GroupJournal of Applied Animal Research0971-21190974-18442019-01-0147154655110.1080/09712119.2019.16830161683016Group sizes effects on growth performance and behavioural characteristics in Korean native calvesJae-Jung Ha0Ka-Young Yang1Dong-Yep Oh2Jun-Koo Yi3Jalil Ghassemi Nejad4Gyeongbuk Livestock Research InstituteAnimal Environment Division, National Institute of Animal Science, Rural Development AdministrationGyeongbuk Livestock Research InstituteGyeongbuk Livestock Research InstituteTeam of An Educational Program for Specialists in Global Animal Science, Brain Korea 21 Plus Project, Sanghuh College of Life Sciences, Konkuk UniversityEffects of group size on performance and behavioural characteristics in Hanwoo calves including heifers (BW = 140.7 ± 3.8 kg, 8 ± 0.5 month) and steers (BW = 167.2 ± 3.4 kg, 8 ± 0.6 month) were evaluated. Fifty-four calves (27 steers and 27 heifers) were assigned to three group sizes, with either 4 (G4), 3 (G3) or 2 (G2) animals per pen, with 3 pen replicates. Data obtained were analysed using the MIXED procedure of SAS. BW was measured bimonthly until the end of the study, and behavioural observations were performed weekly. In heifers, BW showed no differences (P > .05) at neither 8 nor 10 months, however, it was higher (P < .05) in the G4 than the G2 in both 12 and 14 months of age, respectively. In steers, there were no significant differences (P > .05) among the groups in BW, average daily gain, and feed conversion ratio at 8 and 10 months. In heifers, drinking, self-grooming, pairwise grooming were higher in the G4 and G3 than the G2 group (P < .05). The effect of time on performance and behavioural characteristics was highly significant (P < .01). Collectively, the number of 4 calves per pen (32 m2) can be suggested to improve growth performance in Hanwoo calves.http://dx.doi.org/10.1080/09712119.2019.1683016behaviourcortisolhanwoo calveslivestock densityperformance |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Jae-Jung Ha Ka-Young Yang Dong-Yep Oh Jun-Koo Yi Jalil Ghassemi Nejad |
spellingShingle |
Jae-Jung Ha Ka-Young Yang Dong-Yep Oh Jun-Koo Yi Jalil Ghassemi Nejad Group sizes effects on growth performance and behavioural characteristics in Korean native calves Journal of Applied Animal Research behaviour cortisol hanwoo calves livestock density performance |
author_facet |
Jae-Jung Ha Ka-Young Yang Dong-Yep Oh Jun-Koo Yi Jalil Ghassemi Nejad |
author_sort |
Jae-Jung Ha |
title |
Group sizes effects on growth performance and behavioural characteristics in Korean native calves |
title_short |
Group sizes effects on growth performance and behavioural characteristics in Korean native calves |
title_full |
Group sizes effects on growth performance and behavioural characteristics in Korean native calves |
title_fullStr |
Group sizes effects on growth performance and behavioural characteristics in Korean native calves |
title_full_unstemmed |
Group sizes effects on growth performance and behavioural characteristics in Korean native calves |
title_sort |
group sizes effects on growth performance and behavioural characteristics in korean native calves |
publisher |
Taylor & Francis Group |
series |
Journal of Applied Animal Research |
issn |
0971-2119 0974-1844 |
publishDate |
2019-01-01 |
description |
Effects of group size on performance and behavioural characteristics in Hanwoo calves including heifers (BW = 140.7 ± 3.8 kg, 8 ± 0.5 month) and steers (BW = 167.2 ± 3.4 kg, 8 ± 0.6 month) were evaluated. Fifty-four calves (27 steers and 27 heifers) were assigned to three group sizes, with either 4 (G4), 3 (G3) or 2 (G2) animals per pen, with 3 pen replicates. Data obtained were analysed using the MIXED procedure of SAS. BW was measured bimonthly until the end of the study, and behavioural observations were performed weekly. In heifers, BW showed no differences (P > .05) at neither 8 nor 10 months, however, it was higher (P < .05) in the G4 than the G2 in both 12 and 14 months of age, respectively. In steers, there were no significant differences (P > .05) among the groups in BW, average daily gain, and feed conversion ratio at 8 and 10 months. In heifers, drinking, self-grooming, pairwise grooming were higher in the G4 and G3 than the G2 group (P < .05). The effect of time on performance and behavioural characteristics was highly significant (P < .01). Collectively, the number of 4 calves per pen (32 m2) can be suggested to improve growth performance in Hanwoo calves. |
topic |
behaviour cortisol hanwoo calves livestock density performance |
url |
http://dx.doi.org/10.1080/09712119.2019.1683016 |
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