| Records |
| Author |
Balleine BW; Espinet A; Gonzalez F |
| Title |
Perceptual learning enhances retrospective revaluation of conditioned flavor preferences in rats |
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Journal Article |
| Year |
2005 |
Publication |
J. Exp. Psychol.: Anim. Behav. Process. |
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| Volume |
31 |
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341 |
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no |
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Equine Behaviour @ team @ |
Serial |
3055 |
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| Author |
Best, T.; Kemps, E.; Bryan, J. |
| Title |
Effects of Saccharides on Brain Function and Cognitive Performance |
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Journal Article |
| Year |
2005 |
Publication |
Nutrition Reviews |
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| Volume |
63 |
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Pages |
409-418 |
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Approved |
no |
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refbase @ user @ |
Serial |
3447 |
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| Author |
Bauer, G.B. |
| Title |
Research Training for Releasable Animals |
Type |
Journal Article |
| Year |
2005 |
Publication |
Conservation Biology |
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| Volume |
19 |
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Pages |
1779-1789 |
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no |
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refbase @ user @ |
Serial |
3507 |
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| Author |
Potì , P.; Bartolommei, P.; Saporiti, M. |
| Title |
Landmark Use by Cebus apella |
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Journal Article |
| Year |
2005 |
Publication |
International Journal of Primatology |
Abbreviated Journal |
Int. J. Primatol. |
| Volume |
26 |
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Pages |
921-948 |
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no |
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refbase @ user @ |
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3508 |
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| Author |
Boinski, S. |
| Title |
Dispersal patterns among three species of squirrel monkeys (Saimiri oerstedii, S. boliviensis and S. sciureus): III. Cognition |
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Journal Article |
| Year |
2005 |
Publication |
Behaviour |
Abbreviated Journal |
Behaviour |
| Volume |
142 |
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Pages |
679-699 |
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no |
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refbase @ user @ |
Serial |
3509 |
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| Author |
Carruthers, P. |
| Title |
Why the question of animal consciousness might not matter very much |
Type |
Journal Article |
| Year |
2005 |
Publication |
Philosophical Psychology |
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| Volume |
18 |
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Pages |
83-102 |
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no |
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refbase @ user @ |
Serial |
3510 |
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| Author |
J. David Smith; David A. Washburn |
| Title |
Uncertainty Monitoring and Metacognition by Animals |
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Journal Article |
| Year |
2005 |
Publication |
Current Directions in Psychological Science |
Abbreviated Journal |
Curr. Dir. Psychol. Sci. |
| Volume |
14 |
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Pages |
19-24 |
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Approved |
no |
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refbase @ user @ |
Serial |
3511 |
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| Author |
Thiel, D.; Jenni-Eiermann, S.; Palme, R. |
| Title |
Measuring corticosterone metabolites in droppings of capercaillies (Tetrao urogallus) |
Type |
Journal Article |
| Year |
2005 |
Publication |
Annals of the New York Academy of Sciences |
Abbreviated Journal |
Ann N Y Acad Sci |
| Volume |
1046 |
Issue |
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Pages |
96-108 |
| Keywords |
Adrenocorticotropic Hormone/administration & dosage/analysis/metabolism; Animals; Circadian Rhythm; Corticosterone/administration & dosage/*analysis/*metabolism; Feces/*chemistry; Female; Freezing; Galliformes/*metabolism; Male; Reproducibility of Results; Sex Factors; Temperature; Time Factors; Tritium/diagnostic use |
| Abstract |
The capercaillie (Tetrao urogallus), the largest grouse species in the world, is decreasing in numbers in major parts of its distribution range. Disturbances by human outdoor activities are discussed as a possible reason for this population decline. An indicator for disturbances is the increase of the glucocorticoid corticosterone, a stress hormone, which helps to cope with life-threatening situations. However, repeated disturbances might result in a long-term increase of the basal corticosterone concentration, which can result in detrimental effects like reduced fitness and survival of an animal. To measure corticosterone metabolites (CMs) noninvasively in the droppings of free-living capercaillies, first an enzyme immunoassay (EIA) in captive birds had to be selected and validated. Therefore, the excretion pattern of intravenously injected radiolabeled corticosterone was determined and 3H metabolites were characterized. High-performance liquid chromatography (HPLC) separations of the samples containing peak concentrations revealed that corticosterone was extensively metabolized. The HPLC fractions were tested in several EIAs for glucocorticoid metabolites. The physiological relevance of this method was proved after pharmacological stimulation of the adrenocortical activity. Only the recently established cortisone assay, measuring CMs with a 3,11-dione structure, detected an expressed increase of concentrations following ACTH stimulation. To set up a sampling protocol suited for the field, we examined the influence of various storage conditions and time of day on concentrations of CMs. |
| Address |
Swiss Ornithological Institute, 6204 Sempach, Switzerland. dominik.thiel@vogelwarte.ch |
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English |
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0077-8923 |
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| Notes |
PMID:16055846 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4079 |
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| Author |
Baltic, M.; Jenni-Eiermann, S.; Arlettaz, R.; Palme, R. |
| Title |
A noninvasive technique to evaluate human-generated stress in the black grouse |
Type |
Journal Article |
| Year |
2005 |
Publication |
Annals of the New York Academy of Sciences |
Abbreviated Journal |
Ann N Y Acad Sci |
| Volume |
1046 |
Issue |
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Pages |
81-95 |
| Keywords |
Adrenocorticotropic Hormone/metabolism; Animals; Bird Diseases/*metabolism; Conservation of Natural Resources; Corticosterone/*metabolism; Ecosystem; Feces/*chemistry; Female; Galliformes/*metabolism; Immunoenzyme Techniques/methods/veterinary; Male; Reproducibility of Results; Stress/metabolism/*veterinary; Tritium/diagnostic use |
| Abstract |
The continuous development of tourism and related leisure activities is exerting an increasingly intense pressure on wildlife. In this study, a novel noninvasive method for measuring stress in the black grouse, an endangered, emblematic species of European ecosystems that is currently declining in several parts of its European range, is tested and physiologically validated. A radiometabolism study and an ACTH challenge test were performed on four captive black grouse (two of each sex) in order to get basic information about the metabolism and excretion of corticosterone and to find an appropriate enzyme-immunoassay (EIA) to measure its metabolites in the feces. Peak radioactivity in the droppings was detected within 1 to 2 hours. Injected (3)H-corticosterone was excreted as polar metabolites and by itself was almost absent. A cortisone-EIA was chosen from among seven tested EIAs for different groups of glucocorticoid metabolites, because it cross-reacted with some of the formed metabolites and best reflected the increase of excreted corticosterone metabolites, after the ACTH challenge test. Concentrations of the metabolites from fecal samples collected from snow burrows of free-ranging black grouse were within the same range as in captive birds. The noninvasive method described may be appropriate for evaluating the stress faced by free-living black grouse populations in the wild, particularly in mountain ecosystems where human disturbance, especially by winter sports, is of increasing conservation concern. |
| Address |
Zoological Institute, Division of Conservation Biology, Baltzerstrasse 6, CH-3012 Bern, Switzerland |
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English |
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0077-8923 |
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| Notes |
PMID:16055845 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4080 |
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| Author |
Mostl, E.; Rettenbacher, S.; Palme, R. |
| Title |
Measurement of corticosterone metabolites in birds' droppings: an analytical approach |
Type |
Journal Article |
| Year |
2005 |
Publication |
Annals of the New York Academy of Sciences |
Abbreviated Journal |
Ann N Y Acad Sci |
| Volume |
1046 |
Issue |
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Pages |
17-34 |
| Keywords |
Animals; Birds/*metabolism; Corticosterone/*analysis/metabolism; Feces/*chemistry; Gas Chromatography-Mass Spectrometry; Immunoassay; Molecular Structure; Reproducibility of Results; Sensitivity and Specificity |
| Abstract |
Fecal steroid analyses are becoming increasingly popular among both field and laboratory scientists. The benefits associated with sampling procedures that do not require restraint, anesthesia, and blood collection include less risk to subject and investigator, as well as the potential to obtain endocrine profiles that are not influenced by the sampling procedure itself. In the feces, a species-specific pattern of metabolites is present, because glucocorticoids are extensively metabolized. Therefore, selection of adequate extraction procedures and immunoassays for measuring the relevant metabolites is a serious issue. In this review, emphasis is placed on the establishment and analytical validation of methods to measure glucocorticoid metabolites for a noninvasive evaluation of adrenocortical activity in droppings of birds. |
| Address |
Institute of Biochemistry, Department of Natural Sciences, University of Veterinary Medicine, Vienna, Veterinarplatz 1, A-1210 Vienna, Austria. erich.moestl@vu-wien.ac.at |
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English |
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0077-8923 |
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| Notes |
PMID:16055841 |
Approved |
no |
| Call Number |
Equine Behaviour @ team @ |
Serial |
4082 |
| Permanent link to this record |
