Mixed-species grouping in Thomson's and Grant's gazelles: the antipredator benefits

  title={Mixed-species grouping in Thomson's and Grant's gazelles: the antipredator benefits},
  author={Clare D. Fitzgibbon},
  journal={Animal Behaviour},
  • C. Fitzgibbon
  • Published 1 June 1990
  • Environmental Science
  • Animal Behaviour
Foraging and anti-predation behavior of Thomson’s gazelles (Gazella thomsoni) and Grant’s gazelles (Gazella granti) at a waterhole
Prey species make behavioral decisions to reduce the perceived risk of predation and the time spent vulnerable to predation. Behavioral responses to predators are for example selection of specific
Anti-Predator Benefits of Mixed-Species Groups of Cowtail Stingrays (Pastinachus sephen) and Whiprays (Himantura uarnak) at Rest
It is determined that cowtails formed larger hetero- than monospecific groups despite the low density of whiprays, and that tail length is negatively allometric with body size, suggesting its importance in vulnerable early life stages.
Social learning in mixed-species troops of Saguinus fuscicollis and Saguinus labiatus: tests of foraging benefit hypotheses in captivity
The selective costs and benefits affecting the evolution of group living have long interested behavioural ecologists because knowledge of these selective forces can enhance our understanding not only
On the Advantages of Mixed-Species Groups: Impalas Adjust Their Vigilance When Associated With Larger Prey Herbivores
The concept that larger and dominant heterospecifics were likely to increase competition for food access, thereby forcing higher vigilance of impalas, outweighing any reduction from collective vigilance is discussed.
Nonrandom mixing between groups of Przewalski's gazelle and Tibetan gazelle
Mixed-species groups were larger than single-species all-female, all-male, and mixed-sex groups, suggesting that individuals in larger groups may benefit from a reduction in predation risk.
Mixed-species Flock Members’ Reactions to Novel and Predator Stimuli
The results suggest that chickadees may have a sentinel-like status in the flock, and provide a foundation for future work exploring the functions of communicative differences in mixed-species flocks.
Under my wing: lesser kestrels and jackdaws derive reciprocal benefits in mixed-species colonies
A reciprocal influence on behavior of lesser kestrels and jackdaws nesting within the same colony is revealed, whereby both species experience decreased energetic expenditures associated with vigilance, but only lesser kstrels appear to benefit via reduced nest defense effort.
Effects of Single- and Mixed-Species Group Composition on the Flight Initiation Distances of Plains and Grevy's Zebras
Examining the flight initiation distances of Plains and Grevy's zebras in single-species and mixed-species groups from an approaching human suggested a bidirectional moderating influence of heterospecifics on risk assessment.
Vigilance of mustached tamarins in single-species and mixed-species groups—the influence of group composition
Signs are found that associating tamarin species in MSG might complement each other in the direction of vigilance, but the division of labor alone does not satisfactorily explain all the findings.


The Comparative Behavior of Grants and Thomson's Gazelles
The comparative behavior of two associated gazelles, Gazella granti and G. thomsonii was observed in Ngorongoro Crater, Tanzania during a 2½-year antelope behavior study, and morphological differences alone may be considered adequate species-specific isolating mechanisms.
Flight Behaviour and Avoidance of Predators in Thomson's Gazelle (Gazella Thomsoni Guenther 1884)
[As a suhsidiary result of a study on social behaviour of Thomson's gazelle in Serengeti National Park (Tanzania) there are given informations on flight behaviour and avoidance of predators. Alert
The effects of mixed-species flocking on the vigilance of shorebirds: Who do they trust?
Antipredator benefits of schooling behaviour in a cyprinodontid fish, the banded killifish (Fundulus diaphanus)
Individual risk of being attacked and killed by a fish predator declined with increasing killifish school size in a manner closely predicted by the dilution hypothesis, and straying from a school has an associated increased risk of mortality to predation, which selects for schooling behaviour.
Avian flocking in the presence of a predator
A trained hawk was flown over flocks of granivorous yellow-eyed juncos to compare time budgets in the presence and absence of a predator, and it was found that time budgets changed after the predator was introduced and also that flock size increased in the absence of the predator.
Social learning and the significance of mixed-species flocks of chickadees (Parus spp.)
The experiments described in this paper show that two species of chickadees learn from one another about the location and nature of potential feeding places when they are foraging together in mixed
Forms of aggression in Thomson's gazelle; their situational motivation and their relative frequency in different sex, age, and social classes.
  • F. Walther
  • Psychology
    Zeitschrift fur Tierpsychologie
  • 1978
Forms of aggression, their situational motivations and frequencies in Thomson's gazelle were investigated to elucidate the multiple functions of aggressive behavior as well as quantitative
Ecological Aspects of Some Mixed-Species Foraging Flocks of Birds
Mixed—species flocks of birds composed of chickadees, titmice, woodpeckers, nuthatches, creepers, kinglets, and wood warblers were studied in several habitats in Louisiana, Maryland, and Maine and appear to be an effective adaptation to difficult conditions.
Variability in the Responses of Black-Billed Magpies To Natural Predators
It is suggested that although parental investment theory may be basically correct in predicting that young increase in value to their parent as they approach independence, a variety of other factors may affect anti-predator behavior, such as the types of predators likely to be encountered and the relative danger they pose to different age classes.