ESTRUS DETECTION WITH ACTIVITY TAGS IN DAIRY-COWS HOUSED IN TIE-STALLS

Authors
KENNEDY AD INGALLS JR
Citation
Ad. Kennedy et Jr. Ingalls, ESTRUS DETECTION WITH ACTIVITY TAGS IN DAIRY-COWS HOUSED IN TIE-STALLS, Canadian journal of animal science, 75(4), 1995, pp. 633-636
Citations number
11
Categorie Soggetti
Agriculture Dairy & AnumalScience
Journal title
Canadian journal of animal science → ACNP
ISSN journal
00083984
Volume
75
Issue
4
Year of publication
1995
Pages
633 - 636
Database
ISI
SICI code
0008-3984(1995)75:4<633:EDWATI>2.0.ZU;2-U
Abstract
Activity tags were attached to the rear ankle of 11 Holstein dairy cow s maintained indoors in tie-stalls except for a 3 h daily exercise per iod. Cows were monitored for 56-63 d. Activity tags detected 18/27 (67 %) of estruses with 22 incorrect indications (false positives) compare d to a visual detection rate of 19% with three false positives. Use of a correction method decreased the number of activity tag false positi ves considerably with only a decrease of two in the number of correctl y identified estruses.