Effect of Capture, Phenotype, and Physiological Status on Blood Glucose and Plasma Corticosterone Levels in Free-Ranging Dice Snakes
2020
Аутори:
Lakušić, MargaretaBilly, Gopal
Bjelica, Vukašin
Golubović, Ana
Anđelković, Marko
Bonnet, Xavier
Тип документа:
Чланак у часопису (Објављена верзија)
,
© 2020 by The University of Chicago
Метаподаци
Приказ свих података о документуАпстракт:
Theoretically, animals integrate intrinsic and extrinsic factors to
respondappropriately to thewide range of stressors they encounter
during their life span. We examined how stress response varies
betweensexes andamongmorphotypes inwild dice snakes (Natrix
tessellata).Wealso considered reproductive and feeding status and
antipredator behavior. We used two indicators of stress (glucose
[GLUC] and corticosterone [CORT] levels) at eight sampling time
intervals (immediately after capture, up to 17 h after) and a large
sample size (N p 113 snakes). Concentrations of both markers
increased sharply after capture (an equivalent of predation). This
acute phase occurred earlier for GLUC (30 min) compared to
CORT (60 min). Then the values plateaued to very high levels
without decline over time, indicating prolonged saturation of the
hypothalamus-pituitary-adrenal axis. In contrast to our expectations,
we found no effect of sex, morphotype, or reproductive status.
Yet the CORT stress response of those individuals displaying
death-feigning (DF) antipredator behavior was attenuated
compared to those that did not. Low stress hormones levels may
facilitate the expression of DF (high levels supporting fleeing
behavior). The presence of partially digested material in the
stomach was associated with higher blood GLUC during the
plateau. Assaying bloodGLUCrequires very little blood butwas
as good as CORT at gauging acute stress response. The prolonged
plateau suggests that captivity should be minimized
during field studies.
Кључне речи:
antipredator behavior; glucose; Natrix tessellata; reptile; stressИзвор:
Physiological and Biochemical Zoology, 2020, 93, 6, 477-487Финансирање / пројекти:
- Rufford Small Grants Foundation, Grant no. 20915-1
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200007 (Универзитет у Београду, Институт за биолошка истраживања 'Синиша Станковић') (RS-MESTD-inst-2020-200007)
- Министарство науке, технолошког развоја и иновација Републике Србије, институционално финансирање - 200178 (Универзитет у Београду, Биолошки факултет) (RS-MESTD-inst-2020-200178)
DOI: 10.1086/711958
ISSN: 1537-5293