Effectiveness of various cattle ear tags as markers for Weddell seals

Testa, J. Ward; Rothery, Peter. 1992 Effectiveness of various cattle ear tags as markers for Weddell seals. Marine Mammal Science, 8 (4). 344-353. 10.1111/j.1748-7692.1992.tb00050.x

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Abstract/Summary

Methods for estimating tag loss and sightability of tags are presented. Rates of tag loss were estimated for metal and several varieties of plastic cattle ear tags in a long-term population study of Weddell seals. Tags were lost at a higher rate in the first year after application than in subsequent years, and pups lost tags at a higher rate than older seals given the same tag types. Medium-sized plastic tags (Dalton, Allflex and Fearing) were retained at higher rates and were overlooked less frequently than metal tags on adult seals. Dalton Jumbo Rototags showed the lowest loss rates on pups in comparison to larger, flexible plastic tags, but were harder to read in the field.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	10.1111/j.1748-7692.1992.tb00050.x
ISSN:	0824-0469
Additional Keywords:	tagging, tag loss, mark-recapture, Leptonychotes weddellii, Weddell seal
NORA Subject Terms:	Biology and Microbiology
Date made live:	23 Jan 2018 13:10 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/519067

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