Biology:Animal identification

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Calf identified with ear tag and transponder

Animal identification using a means of marking is a process done to identify and track specific animals. It is done for a variety of reasons including verification of ownership, biosecurity control, and tracking for research or agricultural purposes.

History

Individual identification of animals by means of body markings has been practiced for over 3,800 years, as stated in Code of Hammurabi.[1] The first official identification systems are documented as far as the 18th century. In Uruguay for instance maintained at that time a register of hot brands.[2]

Methods

Biometrics

Rather than tags or tattoos, biometric techniques may be used to identify individual animals: zebra stripes, blood vessel patterns in rodent ears, muzzle prints, bat wing patterns, primate facial recognition and koala spots have all been tried.[3]

Birds

Sheep

  • Freeze branding
  • Branding (hot-iron)
  • Collar
  • Earmarking
  • Ear tags (non-electronic)
  • Ear tags (electronic)
  • Semi-permanent paint

Pigs

  • Collars (electronic and non-electronic)
  • Earmarking
  • Ear tags (non-electronic)
  • Ear tags (electronic)
  • Semi-permanent paint
  • Tattoo (see animal tattoo)

Horses

Cattle

  • Anklets
  • Branding (freeze)
  • Branding (hot-iron)
  • Collars (electronic and non-electronic)
  • Earmarking
  • Ear tags (non-electronic)
  • Ear tags (electronic)
  • Rumen bolus (electronic)
  • Cowbell

Dogs

Laboratory mice

  • Earmarking (notching or punching)
  • Ear tags (nickel, copper or scannable 2D barcode tags)
  • Microchip implants
  • Hair dye
  • Manual tattoos (tail, foot pad or ears)
  • Automated tail tattoos[4]

Fish

Marine mammals

  • Transponders
  • Adhesive tags

Amphibians

Invertebrates

  • Adhesive tags
  • Semi-permanent paint

National animal identification schemes

  • British Cattle Movement Service in Britain
  • National Animal Identification and Tracing in New Zealand
  • National Animal Identification System in the United States
  • National Livestock Identification System in Australia

Wildlife photo-identification

Researchers use variation on humpback whale flukes to identify and track the animals

Photo-identification is a technique used to identify and track individuals of a wild animal study population over time. It relies on capturing photographs of distinctive characteristics such as skin or pelage patterns or scars from the animal. In cetaceans, the dorsal fin area and tail flukes are commonly used.

Photo-identification is generally used as an alternative to other, invasive methods of tagging that require attaching a device to each individual. The technique enables precise counting, rather than rough estimation, of the number of animals in a population. It also allows researchers to perform longitudinal studies of individuals over many years, yielding data about the lifecycle, lifespan, migration patterns, and social relationships of the animals.

Species that are studied using photo-identification techniques include:

Footnotes

Gallery

References

  1. Blancou, J (2001). "A history of the traceability of animals and animal products". Revue Scientifique et Technique (International Office of Epizootics) 20 (2): 413–25. PMID 11548516. 
  2. "Allflex Corporate Web Site - the history of livestock identification". http://www.allflex-group.com/front-offices/anglais/119-the_history_of_livestock_identification.aspx?idparentnode=120. 
  3. White, Anna (April 2019). "The High-Tech, Humane Ways Biologists Can Identify Animals". Smithsonian. https://www.smithsonianmag.com/science-nature/high-tech-humane-ways-biologists-identify-animals-180971632/. 
  4. Bell, J.. "Labstamp system.". Archived from the original on February 26, 2015. https://web.archive.org/web/20150226141008/http://actstraining.com/wp-content/uploads/2011/08/1115-2011-August-Labstamp-Power-Point-for-demos.pdf. Retrieved February 26, 2015. 
  5. Fouilloux, Chloe; Garcia-Costoya, Guillermo; Rojas, Bibiana (2020). "Visible Implant Elastomer (VIE) Success in Early Larval Stages of a Tropical Amphibian Species". PeerJ 8: e9630. doi:10.7717/peerj.9630. PMID 32864207. 
  6. ECOCEAN Whale Shark Photo-identification Library
  7. The Manta Network
  8. Wunderpix Photo ID project
  9. Gamble, Lloyd; Ravela, Sai; McGarigal, Kevin (2007-08-29). "Multi-scale features for identifying individuals in large biological databases: an application of pattern recognition technology to the marbled salamander Ambystoma opacum: Identifying individual marbled salamanders" (in en). Journal of Applied Ecology 45 (1): 170–180. doi:10.1111/j.1365-2664.2007.01368.x. 
  10. Lee, Derek E.; Lohay, George G.; Cavener, Douglas R.; Bond, Monica L. (2022-09-06). "Using spot pattern recognition to examine population biology, evolutionary ecology, sociality, and movements of giraffes: a 70-year retrospective" (in en). Mammalian Biology. doi:10.1007/s42991-022-00261-3. ISSN 1618-1476. https://doi.org/10.1007/s42991-022-00261-3.