Elsevier

Animal Behaviour

Volume 56, Issue 4, October 1998, Pages 927-936
Animal Behaviour

Regular Article
Shyness and boldness in pumpkinseed sunfish: individual differences are context-specific

https://doi.org/10.1006/anbe.1998.0852Get rights and content

Abstract

Natural selection often promotes a mix of behavioural phenotypes in a population. Adaptive variation in the propensity to take risks might explain individual differences in shyness and boldness in humans and other species. It is often implicitly assumed that shyness and boldness are general personality traits expressed across many situations. From the evolutionary standpoint, however, individual differences that are adaptive in one context (e.g. predator defence) may not be adaptive in other contexts (e.g. exploration of the physical environment or intraspecific social interactions). We measured the context specificity of shyness and boldness in a natural population of juvenile pumpkinseed sunfish,Lepomis gibbosus, by exposing the fish to a potentially threatening stimulus (a red-tipped metrestick extended towards the individual) and a nonthreatening stimulus (a novel food source). We also related these measures of shyness and boldness to behaviours observed during focal observations, both before and after the introduction of a predator (largemouth bass,Micropterus salmoides). Consistent individual differences were found within both contexts, but individual differences did not correlate across contexts. Furthermore, fish that were scored as intermediate in their response to the metrestick behaved most boldly as foragers and in response to the bass predators. These results suggest that shyness and boldness are context-specific and may not exist as a one-dimensional behavioural continuum even within a single context.

References (35)

  • J.B. Asendorpf

    Beyond temperament: a two-factorial coping model of the development of inhibition during childhood

    Social Withdrawal, Inhibition and Shyness in Childhood

    (1993)
  • C.J. Barnard

    The evolution of food-scrounging strategies within and between species

  • J. Beacham

    The relative importance of body size and aggress-ive experience as determinants of dominance in pumpkinseed sunfish

    Animal Behaviour

    (1988)
  • A.H. Buss et al.

    The ESA approach to temperament

  • K. Coleman et al.

    Behavioral and ecological determinants of home range size in juvenile pumpkinseed sunfish (Lepomis gibbosus

    Ethology

    (1996)
  • J.-G. Godin et al.

    Hunger-dependent predator inspection and foraging behaviors in the threespine stickleback (Gasterosteus aculeatus

    Behavioral Ecology and Sociobiology

    (1994)
  • R. Greenberg

    Neophobia, aversion to open space, and ecological plasticity in song and swamp sparrows

    Canadian Journal of Zoology

    (1989)
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    K. H. RubinJ. B. Asendorpf

    f1

    Correspondence and present address: K. Coleman, Oregon Regional Primate Research Center, 505 N.W. 185th Ave., Beaverton, OR 97006, U.S.A (email:[email protected]

    f2

    D. S. Wilson is at Department of Biological Sciences, Binghamton University, Binghamton, NY 13902-6000, U.S.A.

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