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Ecology, management and conservation in natural and modified habitats
RESEARCH ARTICLE

Permanent marking in an endangered species: physiological response to hot branding in Steller sea lions (Eumetopias jubatus)

Jo-Ann Mellish A B C , Daniel Hennen B , Jamie Thomton B , Lisa Petrauskas A B , Shannon Atkinson A B and Don Calkins B
+ Author Affiliations
- Author Affiliations

A School of Fisheries and Ocean Sciences, University of Alaska Fairbanks, Fairbanks, AK 99775, USA.

B Alaska SeaLife Center, 301 Railway Avenue, PO Box 1329, Seward, AK 99664, USA.

C Corresponding author: Email: joann_mellish@alaskasealife.org

Wildlife Research 34(1) 43-47 https://doi.org/10.1071/WR06073
Submitted: 16 June 2006  Accepted: 19 December 2006   Published: 27 February 2007

Abstract

Identification of individual animals is important in order to evaluate age-specific survival rates, onset of sexual maturity and reproductive rates in wildlife populations. Of the various methods available to researchers, hot branding is the most effective, although somewhat controversial, tool available. The physiological effects of hot-iron branding (n = 7) were assessed using temporarily captive juvenile Steller sea lions (Eumetopias jubatus) (n = 22). Sea lions showed statistically significant increases in white blood cell count, platelet levels, globulin and haptoglobin concentration up to two weeks after branding. No significant differences were found in serum cortisol levels. The changes in health parameters we saw after branding were consistent with minor tissue trauma and indistinguishable from baseline levels after 7–8 weeks.


References

Bossart G. D., Reidarson T. H., Dierauf L. A., and Duffield D. A. (2001). Clinical pathology. In ‘Handbook for Marine Mammal Medicine’. (Eds L. A. Dierauf and F. M. D. Gulland.) pp. 383–436. (CRC Press: New York.)

Dalton, R. (2005). Animal-rights group sues over ‘disturbing’ work on sea lions. Nature 436, 315.
Crossref | GoogleScholarGoogle Scholar | PubMed | King D. P., Aldridge B. M., Kennedy-Stoskopf S., and Stott J. L. (2001). Immunology. In ‘Handbook for Marine Mammal Medicine’. (Eds L. A. Dierauf and F. M. D. Gulland.) pp. 237–252. (CRC Press: New York.)

Kruskal, W. H. , and Wallis, W. A. (1952). Use of ranks in one-criterion analysis of variance. Journal of the American Statistical Association 47, 583–621.
Crossref | GoogleScholarGoogle Scholar | Lander M. E., Westgate A. J., Bonde R. K., and Murray M. J. (2001). Tagging and tracking. In ‘Handbook for Marine Mammal Medicine’. (Eds L. A. Dierauf and F. M. D. Gulland.) pp. 851–894. (CRC Press: New York.)

Lay, D. C., Jr , Friend, T. H. , Grissom, K. K. , Bowers, C. L. , and Mal, M. (1992a). Effects of freeze- or hot-branding on some physiological and behavioral indicators of stress. Applied Animal Behaviour Science 33, 137–147.
Crossref | GoogleScholarGoogle Scholar | Merrick R. L., and Loughlin T. R., andCalkins D. G. (1996). Hot branding: a technique for long term marking of pinnipeds. NOAA Technical memorandum NMFS-AFSC-68, US Department of Commerce.

NMFS (2002). Environmental assessment on the effects of NMFS permitted scientific research activities on threatened and endangered Steller sea lions. Office of Protected Resources, National Marine Fisheries Service, 1315 East West Highway, Silver Spring, MD 20910.

Petrauskas, L. , Tuomi, P. , and Atkinson, S. (2006). Noninvasive monitoring of stress hormone levels of a female Steller sea lion (Eumetopias jubatus) pup undergoing rehabilitation. Journal of Zoo and Wildlife Medicine 37, 75–78.
PubMed | Wells R. S. (2002). Identification methods. ‘Encyclopedia of Marine Mammals’. (Eds W. F. Perrin, B. Wursig and J. G. M Thewissen.) pp. 601–608. (Academic Press: San Diego, CA.)

Zenteno-Savin, T. , Castellini, M. A. , Rea, L. D. , and Fadely, B. S. (1997). Plasma haptoglobin levels in threatened Alaskan pinniped populations. Journal of Wildlife Diseases 33, 64–71.
PubMed |