Odd fish abandon mixed-species groups when threatened

@article{Wolf2004OddFA,
  title={Odd fish abandon mixed-species groups when threatened},
  author={Nancy G. Wolf},
  journal={Behavioral Ecology and Sociobiology},
  year={2004},
  volume={17},
  pages={47-52}
}
  • N. G. Wolf
  • Published 1 May 1985
  • Environmental Science
  • Behavioral Ecology and Sociobiology
SummaryIn a field experiment, two juvenile size classes of striped parrotfish (Scarus iserti), stoplight light parrotfish (Sparisoma viride), and ocean surgeonfish (Acanthurus bahianus) were threatened by a model of a common predator (the trumpetfish, Aulostomus maculatus) while alone and in mixedspecies groups of 3–100 members. Striped parrotfish, which usually consitute the majority of a group, used the groups for protection. Stopight parrotfish, present in very low numbers, hid in the coral… 
Size assortment in mixed-species groups of juvenile-phase striped parrotfish (Scarus iserti) in The Bahamas
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The high frequency of groups with greater than a single associate species suggests that associates may benefit from not being the only phenotypically different individual in a group, perhaps due to benefits of size assortment in lowering predation risk.
Effects of Mixed-species Foraging Groups on the Feeding and Aggression of Juvenile Parrotfishes
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Small mixed-species aggregations of coral reef fishes may be large enough for individuals to assume some of the benefits of group participation while at the same time avoiding the costs of competition realized in larger groups.
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Layering with depth in a heterospecific fish aggregation
  • J. Parrish
  • Environmental Science
    Environmental Biology of Fishes
  • 2004
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Reduction in predation per individual is suggested as a possible force acting to maintain the structure of this fish aggregation in Bermuda.
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Protection of functionally important parrotfishes increases their biomass but fails to deliver enhanced recruitment
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It is shown that redundancy in learning mechanisms among prey guild members may lead to increased stability in rapidly changing environments, and that fish in degraded habitats trained with heterospecific alarm cues, had higher survival than those tried to train with conspecific alarms.
Reduction of the association preference for conspecifics in cave-dwelling Atlantic mollies, Poecilia mexicana
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The regressive evolution of species discrimination in the cave molly, Poecilia mexicana, which, unlike other cave fishes, still has functional eyes was examined, allowing us to examine the response to both visual and non-visual cues involved in species discrimination.
The influence of food competition and predation risk on size-assortative shoaling in juvenile chub (Leuciscus cephalus)
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Results indicate that predation plays a more important role than food competition for size-assortative shoaling in chub and makes it difficult to predict stable combinations of different phenotypes when foragers divide between food patches.
Size-related habitat use and schooling behavior in two species of surgeonfish (Acanthurus bahianus and A. coeruleus) on a fringing reef in Barbados, West Indies
Surgeonfish (Acanthuridae) are prominent, herbivorous members of coral reef communities that occur as dispersed individuals and small, loose groups ('non-schooling fish') or as members of large,
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