Document Detail

Variable neuroendocrine responses to ecologically-relevant challenges in sticklebacks.
MedLine Citation:
PMID:  17321556     Owner:  NLM     Status:  MEDLINE    
Variable neuroendocrine responses to ecologically-relevant challenges in sticklebacks. PHYSIOL BEHAV 00(0) 000-000, 2006. Here, we compare the behavioral, endocrine and neuroendocrine responses of individual sticklebacks exposed to either an unfamiliar conspecific or to a predator. We found that the two stressors elicited a similar hypothalamic-pituitary-interrenal response as assessed by whole-body concentrations of cortisol, but produced quite different patterns of change in brain monoamine and monoamine metabolite content as assessed by concentrations of serotonin (5-HT), dopamine (DA), norepinephrine (NE) and the monoamine metabolites 5-hydroxyindole acetic acid (5-HIAA), homovanillic acid (HVA) and 3-4-dihydroxyphenylacetic acid (DOPAC). For example, relative to baseline levels, NE levels were elevated in individuals exposed to a predator but were lower in individuals confronted by a challenging conspecific. Levels of monoamine neurotransmitters in specific regions of the brain showed extremely close links with behavioral characteristics. Frequency of attacking a conspecific and inspecting a predator were both positively correlated with concentrations of NE. However, whereas serotonin was negatively correlated with frequency of attacking a conspecific, it was positively associated with predator inspection. The data indicate that the qualitative and quantitative nature of the neuroendocrine stress response of sticklebacks varies according to the nature of the stressor, and that interindividual variation in behavioural responses to challenge are reflected by neuroendocrine differences.
Alison M Bell; Tobias Backström; Felicity A Huntingford; Tom G Pottinger; Svante Winberg
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.     Date:  2007-02-02
Journal Detail:
Title:  Physiology & behavior     Volume:  91     ISSN:  0031-9384     ISO Abbreviation:  Physiol. Behav.     Publication Date:  2007 May 
Date Detail:
Created Date:  2007-04-27     Completed Date:  2007-07-03     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  0151504     Medline TA:  Physiol Behav     Country:  United States    
Other Details:
Languages:  eng     Pagination:  15-25     Citation Subset:  IM    
Integrative Biology, University of Illinois at Urbana-Champaign, 505 South Goodwin Ave., Urbana, IL 61801, USA.
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MeSH Terms
Biogenic Monoamines / metabolism
Brain Chemistry / physiology
Esocidae / physiology
Glucocorticoids / metabolism
Hydrocortisone / metabolism
Neurosecretory Systems / metabolism,  physiology*
Predatory Behavior
Sex Determination (Genetics)
Smegmamorpha / physiology*
Stress, Psychological / metabolism,  physiopathology*
Reg. No./Substance:
0/Biogenic Monoamines; 0/Glucocorticoids; 50-23-7/Hydrocortisone

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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