By Bernard Stonehouse
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Additional info for Animal Marking: Recognition Marking of Animals in Research
Application of pharmacological and physiological principles in restraint of wild animals. Wild/. , 14, 1-78. M. (1976). The Chemical Capture of Animals, Balliere Tindall, London. Hawkins, R. E. Martoglio, L. D. and Montgomery, G. G. (1968). Cannon-netting deer. f. Wild/. , 32,191-195. Kruuk, H. (1972). The Spotted Hyaena, University of Chicago Press, Chicago. Jones, D. M. (1976). An assessment of weapons and projectile syringes used for capturing mammals. Vet. , 99, 250-253. Mosby, H. S. and Cantner, D.
1 An ear notching code. 1); up to 99 animals can be distinguished. Identification is often easier with notches than with ear tags, though coloured tags are easier to see at a distance. Notches usually last longer than tags, though they can be distorted by infection, growth, or damage due to fighting. They are more difficult and time consuming to apply than tags, but may be more acceptable aesthetically (Schmidt, 1975). Oosterhuis (personal communication) reports that notching has now replaced routine tagging in ungulates at San Diego Zoo.
In practice, the common use of split rings is to mark wild birds as individuals in such a way that any person fmding a bird wearing one is able, if he chooses, to co-operate with the person fitting the ring. To permit this co-operation, each split ring is stamped not only with a unique serial number but also an address. The length of that address and of the serial number tend to determine the minimum ring size which it is practicable to use: there is no point in so reducing the size of the letters and the figures that they can be read only by the aid of a magnifying glass.