Regulation of behavioral responses by corticotropin-releasing factor

Lowry, Christopher A.; Moore, Frank L.

doi:10.1016/j.ygcen.2005.12.006

Cited by 137 publications

(105 citation statements)

References 120 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Nevertheless, taken together with the data on plasma cortisol we argue that time spent moving is more likely related to stress response, in that individuals who move more show an elevated or prolonged physiological stress response compared to individuals that move less. This interpretation is in accordance with reported short-term stimulatory effects of cortisol and corticotrophin-releasing factor on locomotion (Øverli et al 2002b;Lowry and Moore 2006;Carpenter et al 2007). Almasi et al (2008) found that the amount of eumelanin predicted parental provisioning in the barn owl and that individuals with large spots had a less pronounced behavioural change when exposed to exogenous corticosterone (a simulated stressful situation).…”

Section: Discussionsupporting

confidence: 92%

Melanin-based skin spots reflect stress responsiveness in salmonid fish

Kittilsen

Schjolden

Beitnes-Johansen

et al. 2009

Hormones and Behavior

132

122

View full text Add to dashboard Cite

This version available http://nora.nerc.ac.uk/7671/ NERC has developed NORA to enable users to access research outputs wholly or partially funded by NERC. Copyright and other rights for material on this site are retained by the authors and/or other rights owners. Users should read the terms and conditions of use of this material at http://nora.nerc.ac.uk/policies.html#access This document is the author's final manuscript version of the journal article, incorporating any revisions agreed during the peer review process. Some differences between this and the publisher's version remain. You are advised to consult the publisher's version if you wish to cite from this article. www.elsevier.comContact CEH NORA team at nora@ceh.ac.ukThe NERC and CEH trade marks and logos ('the Trademarks') are registered trademarks of NERC in the UK and other countries, and may not be used without the prior written consent of the Trademark owner. Wilson et al. 1994;Réale et al. 2007). Notwithstanding a certain lack of consensus in terminology, the evolution of these analogues of human personality has evoked considerable scientific interest. Among the questions raised are by which mechanisms behavioural syndromes are inherited, how the variation is maintained, which circumstances benefit different complex phenotypes, and what are the costs and benefits of limited plasticity imposed by more or less fixed trait associations (DeWitt et al. 1998;Koolhaas et al. 1999;Sih et al. 2004; Dingemanse and Réale 2005;McElreath et al. 2007;Réale et al. 2007;Wolf et al. 2007). Furthermore, in the barn owl (Tyto Alba) melanin-based colouration is associated with several behavioural, morphological and physiological characteristics that have been linked to stress coping ability (Almasi et al. 2008).Based on observations that HR and LR trout differed in melanin pigmentation our hypothesis was that spotted fish, in the closely related specie Atlantic salmon (Salmo Salar), 5 would show a lower cortisol reponse to stress when compared to a non-spotted group of individuals. Furthermore, several documented changes in the behaviour of the two trout lines made us predict that also behaviour would differ between groups of spotted and non-spotted fish. The main focus of this study was therefore to test the hypothesis that there exist an association between melanin-based pigmentation and hypothalamus-pituitary-interrenal (HPIaxis) reactivity in salmonid fish. Furthermore, we tested the prediction that behavioural differences are present in two groups of fish chosen divergently on melanin pigmentation. Materials and methods Quantification of melanin-based colorationIn the studies described below, photographs of experimental fish were captured with a Canon EOS 450D digital camera and transferred to a computer for further analyses of melanin-based coloration. Prior to photography, each fish were sedated in 200 mg/l MS-222 and placed adjacent to a measuring tape with millimetre resolution, allowing for an accurate estimation of the area where spots were counted. The d...

show abstract

Section: Discussionsupporting

confidence: 92%

Melanin-based skin spots reflect stress responsiveness in salmonid fish

Kittilsen

Schjolden

Beitnes-Johansen

et al. 2009

Hormones and Behavior

132

122

View full text Add to dashboard Cite

show abstract

“…CRH has been shown to act within the brain to affect locomotor activity (Clements et al 2002, Lowry & Moore 2006, and feeding behaviors and appetite (Bernier & Peter 2001, Bernier & Craig 2005. Similarly, U-I has been shown to act within the brain to regulate food intake (Bernier & Peter 2001).…”

Section: Causes and Functional Implications Of Variation In Stress Phmentioning

confidence: 99%

Habitat-associated intraspecific variation in behavior and stress responses in a demersal coral reef fish

Schrandt¹,

Lema²

2011

Mar. Ecol. Prog. Ser.

View full text Add to dashboard Cite

Habitat heterogeneity has been linked to species diversity and abundance, but can also generate intraspecific behavioral variation that has functional consequences for how animals respond to environmental stressors. Previously, we found that bicolor damselfish Stegastes partitus inhabiting the fringing coral reefs of Curaçao exhibited intraspecific variation in agonistic behaviors in spatial patterns associated with the reef's transition from live coral colonies to rubble. Here we demonstrate for the first time that these fish also vary in physiological stress reactivity with habitat type. Bicolor damselfish collected from live coral and rubble habitats were sampled either < 2.5 min (baseline) or 20 min (stressed) after capture to assess stressor-induced responses of cortisol and mRNA abundance for stress-associated endocrine genes (corticotropin-releasing hormone [CRH], urotensin 1 [U-I], CRH-binding protein [CRH-BP], and CRH receptors 1 and 2) in the brain. Acute capture stress increased plasma levels of cortisol in male and female damselfish from both habitat types, but triggered gene transcript responses contingent on the fish's habitat and sex. In males from both habitats, capture stress increased relative transcript abundance for CRH, U-I and CRH-BP. Females, however, exhibited stress-responsive changes in transcript abundance that were habitat-dependent, with capture stress increasing CRH, U-I and CRH-BP mRNA levels in females from live reef, but decreasing levels of these same transcripts in females from rubble. These results provide evidence that intraspecific variation in behavior in bicolor damselfish is linked to variation in physiological stress reactivity in spatial patterns reflective of the local ecological characteristics of the coral reef.

show abstract

“…First, sustained pain should have triggered an endocrine stress response, initiated by brain release of corticotrophin-releasing factor (crf), which causes locomotor activation in vertebrates, including increased swimming in salmonids (Lowry & Moore 2006). No change in swimming occurred.…”

Section: Claims For Fish Pain Fear and Suffering Are Predicated On mentioning

confidence: 99%