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Cited by 207Animal Behavior and ReproductionFish biology, ecology, and behaviorFish Ecology and Management Studies

Intraspecific resource partitioning in brown trout: the temporal distribution of foraging is determined by social rank

Alanärä, Anders, Burns, Martin D., Metcalfe, Neil B.·2001·Journal of Animal Ecology
DOI 10.1046/j.0021-8790.2001.00550.x
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Abstract

Summary Animals can reduce the competition for a limiting resource by temporal segregation, whereby individuals exploit the resource at different times. However, the pay‐offs may vary predictably over time, and it can be predicted that (a) more dominant competitors should gain access to resources at the preferred times and (b) the degree of temporal segregation will vary with the intensity of competition. Here we show experimentally that individual brown trout Salmo trutta (L.) made sequential use of foraging areas, with dominant individuals feeding mainly at the most beneficial times of dusk and the early part of the night while more subordinate fish fed at other times. However, the degree of overlap in foraging times between high‐ranking fish was dependent on energetic demands. At low temperatures (when requirements were low) the temporal activity patterns of top‐ranking fish were synchronized, with foraging concentrated at the preferred times. In contrast, when temperature was raised to increase energetic requirements, activity patterns showed strong temporal segregation: the most dominant fish remained predominantly nocturnal, whereas second‐ranking fish became increasingly diurnal. This is the first experimental demonstration of shifts in the daily pattern of activity caused by varying intensity of intraspecific competition.

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Crossref · 10.1046/j.0021-8790.2001.00550.x

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  • Temporal partitioning regularly results in the dominant individual gaining primary access to the early part of the active period, whereas lower-ranking individuals are shunted to either a more unconsolidated or delayed activity pattern.

    “This temporal partitioning regularly results in the dominant individual gaining primary access to the early part of the active period, whereas lower-ranking individuals are shunted to either a more unconsolidated or delayed activity pattern (bellbirds: [42], trout: [6], rats: [25]), in a manner that also resembles the division of time between younger and older individuals in the examples presented”

    From The neuroendocrine control of the circadian system: Adolescent chronotype (2012) · cites this paper as [6]

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Authors
Alanärä, A., Burns, M. D., & Metcalfe, N. B.
Affiliations
  • Swedish University of Agricultural Sciences (SE)
  • University of Glasgow (GB)
Corresponding author
Alanärä, Anders
ORCID
Metcalfe, Neil B.
Venue
Journal of Animal Ecology
Publisher
Wiley
Published
2001-11
Volume
70
Issue
6
Pages
980-986
ISSN
  • 0021-8790 (ISSN-L)
  • 1365-2656
DOI
10.1046/j.0021-8790.2001.00550.x
OpenAlex
W2119954397
Cited by
207
References
29
Citations by year
2026: 8 · 2025: 2 · 2024: 9 · 2023: 3 · 2022: 10 · 2021: 9 · 2020: 11 · 2019: 8 · 2018: 15 · 2017: 5 · 2016: 12 · 2015: 8 · 2014: 10 · 2013: 10 · 2012: 15
FWCI
7.63
Type
journal article
Language
en
Open access
closed
Licence
onlinelibrary.wiley.com/termsAndConditions#vor (vor, 145 d)
Locations
  • Journal of Animal Ecology (publishedVersion)
  • ENLIGHTEN (Jurnal Bimbingan dan Konseling Islam) (submittedVersion)
Topics
  • Life Sciences › Agricultural and Biological Sciences › Ecology, Evolution, Behavior and Systematics › Animal Behavior and Reproduction
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Fish biology, ecology, and behavior
  • Physical Sciences › Environmental Science › Nature and Landscape Conservation › Fish Ecology and Management Studies
Keywords
intraspecific competition, brown trout, social rank, nocturnal feeding, diurnal foraging, energy requirements, temperature effects

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