Variation in Schooling and Aggression Amongst Guppy (Poecilia Reticulata) Populations in Trinidad

  title={Variation in Schooling and Aggression Amongst Guppy (Poecilia Reticulata) Populations in Trinidad},
  author={Benoni H. Seghers and Anne E. Magurran},
Schooling behaviour is an effective defence against predation but, since it depends on coordinated behaviour, it may restrict individual competition for limited resources. We tested the hypothesis that levels of individual aggression will be reduced in fish with a high schooling tendency by comparing the behaviour of guppies, Poecilia reticulata, from eight Trinidad populations. Schooling tendency was assayed in the wild. Fish were then transferred to the laboratory where aggression was… 
Predator Inspection Behaviour Covaries With Schooling Tendency Amongst Wild Guppy, Poecilia Reticulata, Populations in Trinidad
There is a strong correlation between schooling tendency and the group sizes adopted by guppies inspecting a realistic model predator, and it seems unlikely that many of these fish were caught in a Prisoner's Dilemma.
Behaviour and morphology in wild guppies from populations with high and low predation pressure in Trinidad
Behaviour and morphology can vary significantly within a species as a result of the predation pressure individuals are exposed to. Wild populations of guppies (Poecilia reticulata) exposed to high
Interpopulation Differences in Shoaling Behaviour in Guppies (Poecilia reticulata): Roles of Social Environment and Population Origin
The results suggest a role for interactions between the source of the focal individuals, the demography of the group in which they were reared and the origin of the guppies with whom they wereReared in Trinidad, and that high-predation fish displayed a stronger propensity to shoal than low-Predation ones.
Predation risk reduces male-male sexual competition in the Trinidadian guppy (Poecilia reticulata)
It is shown that males engaged in significantly fewer aggressive interactions with conspecific males in the presence of a fish predator, but they continued to court and attempt copulations with females at the same rate irrespective of the level of predation risk.
Repeatability in Boldness and Aggression Among Wild Zebrafish (Danio rerio) From Two Differing Predation and Flow Regimes
  • T. Roy, A. Bhat
  • Environmental Science, Psychology
    Journal of comparative psychology
  • 2018
Investigation of repeatability in risk-taking during feeding among individuals and agonistic interactions among dyads of wild zebrafish collected from two habitats that differed in predation and flow regimes found male dyads from the low-predation stagnant-water population were significantly more aggressive than female dyads.
Sexual conflict as a consequence of ecology: evidence from guppy, Poecilia reticulata, populations in Trinidad
  • A. Magurran, B. Seghers
  • Environmental Science
    Proceedings of the Royal Society of London. Series B: Biological Sciences
  • 1994
An investigation of the behaviour of guppies, Poecilia reticulata, in the wild reveals that sexual conflict varies markedly in different habitats. Males from high-predation sites in Trinidad (where
Predation mediated population divergence in complex behaviour of nine‐spined stickleback (Pungitius pungitius)
The data reject the hypothesis that behavioural syndromes exist as a result of genetic correlations between behavioural traits, and support the contention that different behavioural types can be predominant in populations differing in predation pressure.
Predation risk and alternative mating tactics in male Trinidadian guppies (Poecilia reticulata)
  • J. Godin
  • Environmental Science
  • 2004
The results are the first to confirm risk-sensitive mating behaviour in free-ranging male guppies within a population, and demonstrate the potential importance of predators in influencing the relative use of alternative mating tactics in this species on a microgeographical scale in the wild.
Divergence in social traits in Trinidadian guppies selectively bred for high and low leadership in a cooperative context
A selective breeding design in the Trinidadian guppy is used to quantify the heritability of leadership in a cooperative context, and determine the behavioural traits associated with it, suggesting that there may be sex-specific mechanisms driving the emergence ofleadership in this context.