Plasma cortisol concentrations before and after social stress in rainbow trout and brown trout

Katherine A. Sloman, Neil B. Metcalfe, Alan C. Taylor, Kathleen M. Gilmour

Research output: Contribution to journalArticle

Abstract

Two related experiments examined the relationship between plasma cortisol concentrations and the development of social hierarchies in fish. In the first, rainbow trout, Oncorhynchus mykiss, and brown trout, Salmo trutta, were observed for dominance interactions when confined within single-species pairs for 4, 48, or 168 h. Subordinate members of a pair exhibited significantly higher cortisol concentrations than dominant and single fish, but the pattern of cortisol elevation differed between the two species, being quicker to rise and increasing to a higher level in rainbow trout. Cortisol concentrations were correlated with behavioural measurements; the more subordinate the behaviour exhibited by a fish, the higher its cortisol concentration. Social stress was a chronic stressor, and no acclimation to social status occurred during the week. In the second experiment, measurements of plasma cortisol were made before pairing of rainbow trout and then after 48 h of confinement in pairs. Subordinate fish demonstrated significantly higher concentrations of plasma cortisol both before and after social stress. It therefore appears that in addition to cortisol being elevated during periods of social stress, an association may exist between initial cortisol levels and the likelihood of a fish becoming subordinate.
Original languageEnglish
Pages (from-to)383-389
Number of pages7
JournalPhysiological and Biochemical Zoology
Volume74
Issue number3
DOIs
Publication statusPublished - May 2001
Externally publishedYes

Fingerprint

Trout
Oncorhynchus mykiss
Salmo trutta
cortisol
Hydrocortisone
Plasmas
Fish
Fishes
fish
Social Hierarchy
Acclimatization
acclimation
Experiments

Keywords

  • Hydrocortisone
  • Salmo trutta
  • Salmo salar
  • Oncorhynchus mykiss
  • Menstruation
  • Acclimatization

Cite this

Sloman, Katherine A. ; Metcalfe, Neil B. ; Taylor, Alan C. ; Gilmour, Kathleen M. / Plasma cortisol concentrations before and after social stress in rainbow trout and brown trout. In: Physiological and Biochemical Zoology. 2001 ; Vol. 74, No. 3. pp. 383-389.
@article{fd3d96a67ef24eef9527bffae247ede6,
title = "Plasma cortisol concentrations before and after social stress in rainbow trout and brown trout",
abstract = "Two related experiments examined the relationship between plasma cortisol concentrations and the development of social hierarchies in fish. In the first, rainbow trout, Oncorhynchus mykiss, and brown trout, Salmo trutta, were observed for dominance interactions when confined within single-species pairs for 4, 48, or 168 h. Subordinate members of a pair exhibited significantly higher cortisol concentrations than dominant and single fish, but the pattern of cortisol elevation differed between the two species, being quicker to rise and increasing to a higher level in rainbow trout. Cortisol concentrations were correlated with behavioural measurements; the more subordinate the behaviour exhibited by a fish, the higher its cortisol concentration. Social stress was a chronic stressor, and no acclimation to social status occurred during the week. In the second experiment, measurements of plasma cortisol were made before pairing of rainbow trout and then after 48 h of confinement in pairs. Subordinate fish demonstrated significantly higher concentrations of plasma cortisol both before and after social stress. It therefore appears that in addition to cortisol being elevated during periods of social stress, an association may exist between initial cortisol levels and the likelihood of a fish becoming subordinate.",
keywords = "Hydrocortisone, Salmo trutta, Salmo salar, Oncorhynchus mykiss, Menstruation, Acclimatization",
author = "Sloman, {Katherine A.} and Metcalfe, {Neil B.} and Taylor, {Alan C.} and Gilmour, {Kathleen M.}",
year = "2001",
month = "5",
doi = "10.1086/320426?journalCode=pbz",
language = "English",
volume = "74",
pages = "383--389",
journal = "Physiological and Biochemical Zoology",
issn = "1522-2152",
publisher = "University of Chicago Press",
number = "3",

}

Plasma cortisol concentrations before and after social stress in rainbow trout and brown trout. / Sloman, Katherine A.; Metcalfe, Neil B.; Taylor, Alan C.; Gilmour, Kathleen M.

In: Physiological and Biochemical Zoology, Vol. 74, No. 3, 05.2001, p. 383-389.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Plasma cortisol concentrations before and after social stress in rainbow trout and brown trout

AU - Sloman, Katherine A.

AU - Metcalfe, Neil B.

AU - Taylor, Alan C.

AU - Gilmour, Kathleen M.

PY - 2001/5

Y1 - 2001/5

N2 - Two related experiments examined the relationship between plasma cortisol concentrations and the development of social hierarchies in fish. In the first, rainbow trout, Oncorhynchus mykiss, and brown trout, Salmo trutta, were observed for dominance interactions when confined within single-species pairs for 4, 48, or 168 h. Subordinate members of a pair exhibited significantly higher cortisol concentrations than dominant and single fish, but the pattern of cortisol elevation differed between the two species, being quicker to rise and increasing to a higher level in rainbow trout. Cortisol concentrations were correlated with behavioural measurements; the more subordinate the behaviour exhibited by a fish, the higher its cortisol concentration. Social stress was a chronic stressor, and no acclimation to social status occurred during the week. In the second experiment, measurements of plasma cortisol were made before pairing of rainbow trout and then after 48 h of confinement in pairs. Subordinate fish demonstrated significantly higher concentrations of plasma cortisol both before and after social stress. It therefore appears that in addition to cortisol being elevated during periods of social stress, an association may exist between initial cortisol levels and the likelihood of a fish becoming subordinate.

AB - Two related experiments examined the relationship between plasma cortisol concentrations and the development of social hierarchies in fish. In the first, rainbow trout, Oncorhynchus mykiss, and brown trout, Salmo trutta, were observed for dominance interactions when confined within single-species pairs for 4, 48, or 168 h. Subordinate members of a pair exhibited significantly higher cortisol concentrations than dominant and single fish, but the pattern of cortisol elevation differed between the two species, being quicker to rise and increasing to a higher level in rainbow trout. Cortisol concentrations were correlated with behavioural measurements; the more subordinate the behaviour exhibited by a fish, the higher its cortisol concentration. Social stress was a chronic stressor, and no acclimation to social status occurred during the week. In the second experiment, measurements of plasma cortisol were made before pairing of rainbow trout and then after 48 h of confinement in pairs. Subordinate fish demonstrated significantly higher concentrations of plasma cortisol both before and after social stress. It therefore appears that in addition to cortisol being elevated during periods of social stress, an association may exist between initial cortisol levels and the likelihood of a fish becoming subordinate.

KW - Hydrocortisone

KW - Salmo trutta

KW - Salmo salar

KW - Oncorhynchus mykiss

KW - Menstruation

KW - Acclimatization

U2 - 10.1086/320426?journalCode=pbz

DO - 10.1086/320426?journalCode=pbz

M3 - Article

VL - 74

SP - 383

EP - 389

JO - Physiological and Biochemical Zoology

JF - Physiological and Biochemical Zoology

SN - 1522-2152

IS - 3

ER -