Differential stress responses in fish from areas of high- and low-predation pressure

Culum Brown, Carolyn Gardner, Victoria Ann Braithwaite-Read

Research output: Contribution to journalArticle

88 Citations (Scopus)

Abstract

We subjected fish from regions of high and low levels of predation pressure in four independent streams to a mild stressor and recorded their opercular beat rates. Fish from low-predation areas showed higher maximum, minimum and mean opercular beat frequencies than fish from high-predation regions. The change in opercular beat frequency (scope) was also significantly greater in fish from low- than in fish from high-predation regions. Under normal activity levels, however, low predation fish showed a reduced opercular beat frequency, which may be indicative of reduced activity levels or metabolic rate. Opercular beat frequency was negatively correlated with standard length as one would expect based on higher metabolic rates in smaller fish. We suggest that these contrasting stress responses are most likely the result of differential exposure to predators in fish from high- and low-predation areas. We argue that reduced stress responses in high-predation areas evolved to prevent excessive energy expenditure by modulating the fright response.

Original languageEnglish (US)
Pages (from-to)305-312
Number of pages8
JournalJournal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology
Volume175
Issue number5
DOIs
StatePublished - Jul 1 2005

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Fish
stress response
Fishes
predation
Pressure
fish
energy expenditure
Energy Metabolism
expenditure
predator
predators
energy
rate

All Science Journal Classification (ASJC) codes

  • Physiology
  • Ecology, Evolution, Behavior and Systematics
  • Biochemistry
  • Animal Science and Zoology
  • Endocrinology

Cite this

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Differential stress responses in fish from areas of high- and low-predation pressure. / Brown, Culum; Gardner, Carolyn; Braithwaite-Read, Victoria Ann.

In: Journal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology, Vol. 175, No. 5, 01.07.2005, p. 305-312.

Research output: Contribution to journalArticle

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