IMBECU   20882
INSTITUTO DE MEDICINA Y BIOLOGIA EXPERIMENTAL DE CUYO
Unidad Ejecutora - UE
artículos
Título:
Do Cortisol and Corticosterone have the same role to cope with stressors? Measuring Serum Glucocorticoid in free-ranging Guanacos (Lama guanicoe)
Autor/es:
OVEJERO R; NOVILLO A; SOTO-GAMBOA M; MOSCA-TORRES ME; CUELLO P; GREGORIO P; JAHN GA; CARMANCHAHI PD
Revista:
JOURNAL OF EXPERIMENTAL ZOOLOGY PART A-ECOLOGICAL GENETICS AND PHYSIOLOGY
Editorial:
WILEY-LISS, DIV JOHN WILEY & SONS INC
Referencias:
Lugar: New York; Año: 2013 vol. 319A p. 539 - 547
ISSN:
1932-5223
Resumen:
Habitat constrains and shapes successful ecological and physiological strategies and thus provides the context for the evolution of life-history traits. Superimposed on these are unpredictable challenges, for example, storms and natural disasters, human activities which have great potential for stress. Glucocorticoids (GCs) are adrenal steroid hormones that play an important role in vertebrates coping with these predictable and unpredictable environmental challenges.  Although assessing the GCs levels has many applications in the study of wildlife and/or captive animals with or without the necessity of capturing individuals, it requires a species-specific complete validation (analytical and biological) before use. In this work we aimed to: (a) validate a radioimmunoassay (RIA) for measuring glucocorticoides (GCs) levels in serum of L. guanicoe; (b) assess cortisol and corticosterone (if the two GCs are present) levels in serum of free-living individuals of this species and (c) compare their response to acute stressors (handling, shearing and release). Our results successfully: (a) validated RIA for asses GCs levels in wild ungulates, confirm the presence for the two GCs and showed that cortisol and corticosterone are differently affected by environmental stimuli in L.guanicoe; (b) showed GCs different patterns of variation in the field and response to acute stressors, making these camelids an interesting endocrinological model for seeking the adaptive functions of the given variation and further emphasize the complexity of GC physiology in wild mammals.