Readability of visual and electronic leg tags versus rumen boluses and electronic ear tags for the permanent identification of dairy goats
- 1 November 2010
- journal article
- research article
- Published by American Dairy Science Association in Journal of Dairy Science
- Vol. 93 (11), 5157-5166
- https://doi.org/10.3168/jds.2010-3188
Abstract
Murciano-Granadina dairy goats (n=220) were used to assess the performance of visual and electronic identification devices: 1) leg tags (LT) on the shank of the right hind leg (metatarsus) consisting of plastic bands (181 × 39mm, 21g; n=220) printed with a 3-digit code and closed with 2 types of electronic button tags (ET1, 3.9 g, 26 mm o.d., n=90; ET2, 5.5 g, 25 mm o.d., n=130); 2) electronic rumen boluses (RB, 75 g, 68 × 21 mm, n=220) containing 32 × 3.8 mm transponders; 3) electronic ear tags (EE, button-button, 4.8 g, 24 mm, n=47); and 4) visual plastic ear tags (VE, flag-button, 4.2 g, 40 × 38 mm, n=220). The shank circumference of 47 replacement kids (5 to 6 mo of age) and 103 adult goats was measured to evaluate the proper circumference for fastened LT. Goats were identified with RB and VE before the experiment. Time for leg tagging, reading, and data recording with a handheld transceiver was measured. Readability [(read/readable) × 100] was monitored for 1 yr with goats restrained in the milking parlor. Reading time and errors of RB and ET2 in the milking parlor using the handheld transceiver were recorded. Shank circumference of kids (70±1 mm) was 79.5% of that in adult goats (88±1 mm), thus LT (107±1 mm inner circumference) were only applied to adult goats as they were inadequate for 6-mo-old kids. Time for leg tagging and data recording was 53±3 s. At 1 yr, readability of RB was 96.5%. No LT losses occurred and all were visually readable, although 3 (1.5%) had to be removed due to limping, leading to a final LT retention of 98.5%. Moreover, 7 (3.6%) LT were found open and electronically unreadable. Readability of button transponders, excluding removed LT, was 93.6% (3 lost and 2 unreadable) for ET1, and 98.3% (2 lost) for ET2. Readability was 95.7 and 97.0% in EE and VE ear tags, respectively. Only LT and ET1 readabilities differed. Reading time and reading errors (0.3 vs. 0%) in the milking parlor were greater for RB (61.2s) than for ET2 (45.9s). In conclusion, LT were not adequate for the identification of goat kids under 6 mo of age. Only LT with ET2 transponders met International Committee for Animal Recording requirements for official identification of adult goats (readability >98%) under the conditions of this experiment.Keywords
Funding Information
- Secretaría de Estado de Investigacion, Desarrollo e Innovacion (AGL-2007-64541)
- Ministerio de Educación, Cultura y Deporte
This publication has 11 references indexed in Scilit:
- Extended field test on the use of visual ear tags and electronic boluses for the identification of different goat breeds in the United States1Journal of Animal Science, 2009
- Long-term performance of visual and electronic identification devices in dairy goatsJournal of Dairy Science, 2009
- Short Communication: Comparison of Manual Versus Semiautomatic Milk Recording Systems in Dairy GoatsJournal of Dairy Science, 2008
- Electronic identification of Sarda goats under extensive conditions in the island of SardiniaSmall Ruminant Research, 2006
- In vivo mechanical and in vitro electromagnetic side-effects of a ruminal transponder in cattle1,2Journal of Animal Science, 2006
- Retention of different sizes of electronic identification boluses in the forestomachs of sheep1,2Journal of Animal Science, 2006
- Ear-tag retention and identification methods for extensively managed water buffalo (Bubalus bubalis) in TrinidadPreventive Veterinary Medicine, 2006
- Cost evaluation of the use of conventional and electronic identification and registration systems for the national sheep and goat populations in Spain1,2Journal of Animal Science, 2005
- Development of a ceramic bolus for the permanent electronic identification of sheep, goat and cattleComputers and Electronics in Agriculture, 1999
- The Analysis of Binary Data. By D.R. Cox. Pp. viii, 142. £2. 1970. (Methuen.)The Mathematical Gazette, 1972