The desire to apply fecal steroid metabolite monitoring to key questions in conservation biology and behavioral ecology has steadily increased over the past decade. In particular, the measurement of fecal glucocorticoid metabolites, which reflect changes in an individual's adrenal activity, and are thus a measure of the stress response, has become a sought-after tool for conservation biologists and behaviorists alike. The noninvasive nature of this method facilitates longitudinal physiological monitoring concomitant with behavioral observations and other noninvasive ecological and biological data collection, providing an increased level of insight and complexity that was previously impossible to obtain. While the method has huge potential, some doubt is beginning to emerge regarding its general applicability to field studies. This doubt may largely result from some misconceptions and lack of knowledge about the method itself. The perceived simplicity of this methodology has led some to believe that it is an easily and readily applicable tool, without further consideration of potential problems. However, no standardization currently exists for the methodology, and confounding variables are plentiful. While we want to highlight the usefulness and applicability of the technique for conservation biology and behavioral ecology, we primarily review some of the potential pitfalls and identify various tests and experiments researchers may need to perform and/or consider prior to undertaking this type of study. We also discuss some of the future research needs for increased applicability of this exciting methodology.
Purchase
Buy instant access (PDF download and unlimited online access):
Institutional Login
Log in with Open Athens, Shibboleth, or your institutional credentials
Personal login
Log in with your brill.com account
Adkins-Regan, E. 2005. Hormones and animal social behavior. Princeton University Press, Princeton, NJ.
Beehner, J. C., Whitten, P. L. 2004. Modifications of a field method for fecal steroid analysis in baboons. Physiol. Behav. 82: 269-277.
Berger, J., Testa, J. W., Roffe, T., Monfort, S. L. 1999. Conservation endocrinology: a noninvasive tool to understand relationships between carnivore colonization and ecological carrying capacity. Conserv. Biol. 13: 980-989.
Brown, J. L., Wasser, S. K., Wildt, D. E., Graham, L. H. 1994. Comparative aspects of steroid hormone metabolism and ovarian activity in felids measured noninvasively in feces. Biol. Reprod. 51: 776-786.
Brown, J. L., Wasser, S. K., Wildt, D. E., Graham, L. H., Monfort, S. L. 1997. Faecal steroid analysis for monitoring ovarian and testicular function in diverse wild carnivore, primate and ungulate species. In: Proceedings of the 1st International Symposium on Physiologie and Ethology of Wild and Zoo Animals. Berlin, 18-21 Sept., 1996; Proceedings Suppl. II: 27-31.
Buchanan, K., Goldsmith, A. 2004. Noninvasive endocrine data for behavioural studies: the importance of validation. Anim. Behav. 67: 183-185.
Cabezas, S., Blas, J., Marchant, T. A., Moreno, S. 2007. Physiological stress levels predict survival probabilities in wild rabbits. Horm. Behav. 51: 313-320.
Creel, S., Fox, J. E., Hardy, A., Sands, J., Garrott, B., Peterson, R. O. 2002. Snowmobile activity and glucocorticoid stress responses in wolves and elk. Conserv. Biol. 16: 809-814.
Czekala, N., Durrant, B. S., Callison, L., Williams, M., Millard, S. 1994. Fecal steroid hormone analysis as an indicator of reproductive function in the cheetah. Zoo Biol. 13: 119-128.
Fanson, K., Wielebnowski, N., Lucas, J. 2006. Understanding the role of physiology in reintroduction success: stress and reproduction in reintroduced Canada lynx. Proceedings of the 13th Annual Conference of The Wildlife Society, Sept. 23-27, Anchorage, Alaska, pp. 16-17.
Foley, C. A. H., Papageorge, S., Wasser, S. K. 2001. Noninvasive stress and reproductive measures of social and ecological pressures in free-ranging African elephants. Conserv. Biol. 15: 1134-1142.
Frid, A., Dill, L. M. 2002. Human-caused disturbance stimuli as a form of predation risk. Conservation Ecology 6: 11. URL: http://www.consecol.org/vol6/iss1/art11/ http://www.consecol.org/vol6/iss1/art11/
Frigerio, D., Dittami, J., M�stl, E., Kotraschal, K. 2004. Excreted corticosterone metabolites covary with air temperature and air pressure in male Greylag geese (Anser anser). Gen. Comp. Endocrinol. 137: 29-36.
Galama, W. T., Graham, L. H., Savage, A. 2004. Comparison of fecal storage methods for steroid analysis in black rhinoceroses (Diceros bicornis). Zoo Biol. 23: 291-300.
Goymann, W. 2005. Noninvasive monitoring of hormones in bird droppings: physiological validation, sampling, extraction, sex differences, and the influence of diet on hormone metabolite levels. Ann. N. Y. Acad. Sci. 1046(1): 35-53.
Graham, L. H., Goodrowe, K. L., Raeside, J. I., Liptrap, R. M. 1995. Non-invasive monitoring of ovarian function in several felid species by measurement of fecal estradiol-17� and progestins. Zoo Biol. 14: 223-237.
Harper, J. M., Austad, S. N. 2000. Fecal glucocorticoids: a noninvasive method of measuring adrenal activity in wild and captive rodents. Gen. Comp. Endocrinol. 123: 337-344.
Harper, J. M., Austad, S. N. 2001. Effect of capture and season on fecal glucocorticoid levels in mice (Peromyscus maniculatus) and red-backed voles (Clethrionomys gapperi). Gen. Comp. Endocrinol. 123: 337-344.
Hunt, K. E., Wasser, S. K. 2003. Effect of long-term preservation methods on fecal glucocorticoid concentrations of grizzly bear and African elephant. Physiol. Biochem. Zool. 76: 918-928.
Ketterson, E. D., Nolan, V. Jr. 1994. Hormones and life histories. In: Real, L. A., ed. Behavioral mechanisms in evolutionary ecology. University of Chicago Press, Chicago, pp. 327-353.
Khan, M. Z., Altmann, J., Isani, S. S., Yu, J. 2002. A matter of time: evaluating the storage of fecal samples for steroid analysis. Gen. Comp. Endocrinol. 128: 57-64.
Kotrschal, K., Hirschenhauser, K., M�stl, E. 1998. The relationship between social stress and dominance is seasonal in greylag geese. Anim. Behav. 55: 171-176.
Krebs, J. R., Davies, N. B., eds. 1997. Behavioural ecology: an evolutionary approach, 4th ed. Blackwell Science, Oxford, UK.
Lane, J. 2006. Can non-invasive glucocorticoid measures be used as reliable indicators of stress in animals? Anim. Welf. 15: 331-342.
Lynch, J. W., Altmann, J., Njahira, M. N., Rubenstein, N. 2003. Concentrations of four fecal steroids in wild baboons: short-term storage conditions and consequences for data interpretation. Gen. Comp. Endocrinol. 132: 264-271.
Millspaugh, J. J. 1999. Behavioral and physiological responses of elk to human disturbances in the southern Black Hills, South Dakota. Ph.D. dissertation, University of Washington, Seattle, WA.
Millspaugh, J. J., Washburn, B. E. 2003. Within-sample variation of fecal glucocorticoid measurements. Gen. Comp. Endocrinol. 132: 21-26.
Millspaugh, J. J., Washburn, B. E. 2004. The use of glucocorticoid metabolite measures in conservation biology research: considerations for application and interpretation. Gen. Comp. Endocrinol. 138: 189-199.
Millspaugh, J. J., Woods, R. J., Hunt, K. E., Raedeke, K. J., Brundige, G. C., Washburn, B. E. 2001. Fecal glucocorticoid assays and the physiological stress response in elk. Wildl. Soc. Bull. 29: 899-907.
Millspaugh, J. J., Washburn, B. E., Milanick, M. A., Beringer, J., Hansen, L. P., Meyer, T. M. 2002. Non-invasive techniques for stress assessment in white-tailed deer. Wildl. Soc. Bull. 30: 899-907.
Millspaugh, J. J., Washburn, B. E., Milaneck, M. A., Slotow, R., van Dyk, G. 2003. Effects of heat and chemical treatments on fecal glucocorticoid measurements: implications for sample transport. Wildl. Soc. Bull. 31: 399-406.
Monfort, S. L., Mashburn, K. L., Brewer, B. A., Creel, S. R. 1998. Evaluating adrenal activity in African wild dogs (Lycaeon pictus) by fecal corticosteroid analysis. J. Zoo Wildl. Med. 29: 129-133.
M�stl, E., Palme, R. 2002. Hormones as indicators of stress. Domest. Anim. Endocrinol. 23: 67-74.
M�stl, E., Rettenbacher, S., Palme, R. 2005. Measurement of corticosterone metabolites in birds' droppings: an analytical approach. Ann. N. Y. Acad. Sci. 1046: 17-34.
Nakagawa, S. E., M�stl, E., Waas, J. R. 2003. Validation of an enzyme immunoassay to measure faecal glucocorticoid metabolites from Ad�lie penguins (Pygoscelis adeliae): a noninvasive tool for the measurement of stress? Polar. Biol. 26: 491-493.
Palme, R. 2005. Measuring fecal steroids: guidelines for practical application. Ann. N. Y. Acad. Sci. 1046: 75-80.
Palme, R., Fischer, P., Schilddorfer, H., Ismail, M. N. 1996. Excretion of infused 14C-steroid hormones via feces and urine in domestic livestock. Anim. Reprod. Sci. 43: 43-63.
Palme, R., Rettenbacher, S., Touma, C., El-Bahr, S. M., M�stl, E. 2005. Stress hormones in mammals and birds: comparative aspects regarding metabolism, excretion, and noninvasive measurement in fecal samples. Ann. N. Y. Acad. Sci. 1040: 162-171.
Reeder, D. M., Kramer, K. M. 2005. Stress in free-ranging mammals: integrating physiology, ecology, and natural history. J. Mammal. 86: 225-235.
Schwarzenberger, F. 2007. The many uses of non-invasive faecal steroid monitoring in zoo and wildlife species. Int. Zoo Yearb. 41: 52-74.
Schwarzenberger, F., M�stl, E. Palme, R., Bamberg, E. 1996. Faecal steroid analysis for noninvasive monitoring of reproductive status in farm, wild and zoo animals. Anim. Reprod. Sci. 42: 515-526.
Stavisky, R. 1994. Socioendocrinology: Noninvasive techniques for monitoring reproductive function in captive and free-ranging primates. Ph.D. dissertation, Emory University, Atlanta, GA.
Stavisky, R. C., Russell, E., Stallings, J., Smith, E. O., Worthman, C. M., Whitten, P. L. 1995. Fecal steroid analysis of ovarian cycles in free-ranging baboons. Am. J. Primatol. 36: 285-297.
Stoops, M. A., Anderson, G. B., Lasley, B. L., Shideler, S. E. 1999. Use of fecal steroid metabolites to estimate the pregnancy rate of a free-ranging herd of tule elk. J. Wildl. Manage. 63(2): 561-569.
Tarlow, E. M., Blumstein, D. T. 2007. Evaluating methods to quantify anthropgenic stressors in wild animals. Appl. Anim. Behav. Sci. 102: 429-451.
Teixeira, C. P., de Azevedo, C. S., Mendl, M., Cipreste, C. F., Young, R. J. 2007. Revisiting translocation and reintroduction programmes: the importance of considering stress. Anim. Behav. 73: 1-13.
Tempel, D. J., Gutierrez, R. J. 2004. Factors related to fecal corticosterone levels in California spotted owls: implications for assessing chronic stress. Conserv. Biol. 18: 538-547.
Terio, K. A., Brown, J. L., Moreland, R., Munson, L. 2002. Comparison of different drying and storage methods on quantifiable concentrations of fecal steroids in the cheetah. Zoo Biol. 21: 215-222.
Touma, C., Palme, R. 2005. Measuring fecal glucocorticoid metabolites in mammals and birds: the importance of validation. Ann. N. Y. Acad. Sci. 1046: 54-74.
Touma, C., Sachser, N., M�stl, E., Palme, R. 2003. Effects of sex and time of day on metabolism and excretion of corticosterone in urine and feces of mice. Gen. Comp. Endocrinol. 130: 267-278.
Touma, C., Palme, R., Sachser, N. 2004. Analyzing corticosterone metabolites in fecal samples of mice: a noninvasive technique to monitor stress hormones. Horm. Behav. 45: 10-22.
Turner, J. W., Nemeth, R., Rogers, C. 2003. Measurement of fecal glucocorticoids in parrotfishes to assess stress. Gen. Comp. Endocrinol. 133(3): 341-352.
von der Ohe, C. G., Servhen, C. 2002. Measuring stress in mammals using fecal glucocorticoids: opportunities and challenges. Wildl. Soc. Bull. 30: 1215-1225.
von der Ohe, C. G., Wasser, S. K., Hunt, K. E., Servheen, C. 2004. Factors associated with fecal glucocorticoids in Alaskan brown bears (Ursus arctos horribilis). Physiol. Biochem. Zool. 77: 313-320.
Washburn, B. E., Millspaugh, J. J. 2002. Effects of simulated environmental conditions on glucocorticoid metabolite measurements in white-tailed deer feces. Gen. Comp. Endocrinol. 127: 217-222.
Wasser, S. K., Risler, L., Steiner, R. 1988. Excreted steroids in primate feces over the menstrual cycle and pregnancy. Biol. Reprod. 39: 862-872.
Wasser, S. K., Thomas, R., Nair, P. P., Guidry, C., Southres, J., Lucas, J., Wildt, D. E., Monfort, S. L. 1993. Effects of dietary fiber on faecal steroid measurements. J. Reprod. Fertil. 97: 567-574.
Wasser, S. K., Papageorge, S., Foley, C., Brown, J. L. 1996. Excretory fate of estradiol and progesterone in the African elephant (Loxodonta africana) and patterns of fecal steroid concentrations throughout the estrous cycle. Gen. Comp. Endocrinol. 102: 255-262.
Wasser, S. K., Bevis, K., King, G., Hanson, E. 1997. Noninvasive physiological measures of disturbance in the northern spotted owl. Conserv. Biol. 11: 1019-1922.
Wasser, S. K., Hunt, K., Brown, J. L., Cooper, K., Crockett, C., Bechert, U., Millspaugh, J., Larson, S., Monfort, S. 2000. A generalized fecal glucocorticoid assay for us in a divers array of nondomestic mammalian and avian species. Gen. Comp. Endocrinol. 120: 260-275.
Wasser, S. K., Davenport, B., Ramage, E. R., Hunt, K. E., Parker, M., Clarke, C., Stenhouse, G. 2004. Scat detection dogs in wildlife research and management: application to grizzly and black bears in the Yellowstone Ecosystem, Alberta, Canada. Can. J. Zool. 82: 475-492.
Whitten, P. L., Brockman, D. K., Stavisky, R. C. 1998. Recent advances in noninvasive techniques to monitor hormone-behavior interactions. Yearb. Phys. Anthropol. 41: 1-23.
Wikelski, M., Cooke, S. J. 2006. Conservation physiology. TRENDS Ecol. Evol. 21(2): 38-46.
Wingfield, J. C., Ball, G. F., Dufty, A. M. Jr., Hegner, R. E., Ramenofsky, M. 1987. Testosterone and aggression in birds. Am. Sci. 75: 602-608.
Wingfield, J. C., Lynn, S. E., Soma, K. K. 2001. Avoiding the "costs" of testosterone: ecological bases of hormone-behavior interactions. Brain Behav. Evol. 57: 239-251.
Yl�nen, H., Eccard, J. A., Jokinen, I., Sundell, J. 2006. Is the antipredatory response in behaviour reflected in stress measured in faecal corticosteroids in a small rodent? Behav. Ecol. Sociobiol. 60: 350-358.
Ziegler, T. E., Wittwer, D. J. 2005. Fecal steroid research in the field and laboratory: improved methods for storage, transport, processing, and analysis. Am. J. Primatol. 67: 159-174.
Zucker, E. L., Clarke, M. R., Harrison, R. M. 1995. Fecal estradiol values for group-living, cycling, pregnant and lactating female howling monkeys (Aloutta palliata) in Costa Rica. Am. J. Primatol. 36: 167.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 1229 | 266 | 27 |
| Full Text Views | 56 | 5 | 2 |
| PDF Views & Downloads | 54 | 8 | 3 |
The desire to apply fecal steroid metabolite monitoring to key questions in conservation biology and behavioral ecology has steadily increased over the past decade. In particular, the measurement of fecal glucocorticoid metabolites, which reflect changes in an individual's adrenal activity, and are thus a measure of the stress response, has become a sought-after tool for conservation biologists and behaviorists alike. The noninvasive nature of this method facilitates longitudinal physiological monitoring concomitant with behavioral observations and other noninvasive ecological and biological data collection, providing an increased level of insight and complexity that was previously impossible to obtain. While the method has huge potential, some doubt is beginning to emerge regarding its general applicability to field studies. This doubt may largely result from some misconceptions and lack of knowledge about the method itself. The perceived simplicity of this methodology has led some to believe that it is an easily and readily applicable tool, without further consideration of potential problems. However, no standardization currently exists for the methodology, and confounding variables are plentiful. While we want to highlight the usefulness and applicability of the technique for conservation biology and behavioral ecology, we primarily review some of the potential pitfalls and identify various tests and experiments researchers may need to perform and/or consider prior to undertaking this type of study. We also discuss some of the future research needs for increased applicability of this exciting methodology.
| All Time | Past 365 days | Past 30 Days | |
|---|---|---|---|
| Abstract Views | 1229 | 266 | 27 |
| Full Text Views | 56 | 5 | 2 |
| PDF Views & Downloads | 54 | 8 | 3 |