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32 results for “eavesdropping”
Data from: Temperature effects on interspecific eavesdropping in the wild
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Data from: A nocturnal rail with a simple territorial call eavesdrops on interactions between rivals
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Data from: Mimicry and eavesdropping enable a new form of social parasitism in ants
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Data from: Bees eavesdrop upon informative and persistent signal compounds in alarm pheromones
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Data from: Heterospecific eavesdropping in ant-following birds of the Neotropics is a learned behaviour
Animals eavesdrop on other species to obtain information about their environments. Heterospecific eavesdropping can yield tangible fitness benefits by providing valuable information about food resources and predator presence. The ability to eavesdrop may therefore be under strong selection, although extensive research on alarm-calling in avian mixed-species flocks has found only limited evidence that close association with another species could select for innate signal recognition. Nevertheless, very little is known about the evolution of eavesdropping behaviour and the mechanism of heterospecific signal recognition, particularly in other ecological contexts, such as foraging. To understand whether heterospecific eavesdropping was an innate or learned behaviour in a foraging context, we studied heterospecific signal recognition in ant-following birds of the Neotropics, which eavesdrop on vocalizations of obligate ant-following species to locate and recruit to swarms of the army ant Eciton burchellii, a profitable food resource. We used a playback experiment to compare recruitment of ant-following birds to vocalizations of two obligate species at a mainland site (where both species are present) and a nearby island site (where one species remains whereas the other went extinct approx. 40 years ago). We found that ant-following birds recruited strongly to playbacks of the obligate species present at both island and mainland sites, but the island birds did not recruit to playbacks of the absent obligate species. Our results strongly suggest that (i) ant-following birds learn to recognize heterospecific vocalizations from ecological experience and (ii) island birds no longer recognize the locally extinct obligate species after eight generations of absence from the island. Although learning appears to be the mechanism of heterospecific signal recognition in ant-following birds, more experimental tests are needed to fully understand the evolution of eavesdropping behaviour.
Data from: Breaking the cipher: ant eavesdropping on the variational trail pheromone of its termite prey
Predators may eavesdrop on their prey using innate signals of varying nature. In regards to social prey, most of the prey signals are derived from social communication and may therefore be highly complex. The most efficient predators select signals that provide the highest benefits. Here, we showed the use of eusocial prey signals by the termite-raiding ant Odontoponera transversa. O. transversa selected the trail pheromone of termites as kairomone in several species of fungus-growing termites (Termitidae: Macrotermitinae: Odontotermes yunnanensis, Macrotermes yunnanensis, Ancistrotermes dimorphus). The most commonly predated termite, O. yunnanensis, was able to regulate the trail pheromone component ratios during its foraging activity. The ratio of the two trail pheromone compounds was correlated with the number of termites in the foraging party. (3Z)-Dodec-3-en-1-ol (DOE) was the dominant trail pheromone component in the initial foraging stages when fewer termites were present. Once a trail was established, (3Z,6Z)-dodeca-3,6-dien-1-ol (DDE) became the major recruitment component in the trail pheromone and enabled mass recruitment of nest-mates to the food source. Although the ants could perceive both components, they revealed stronger behavioural responses to the recruitment component, DDE, than to the common major component, DOE. In other words, the ants use the trail pheromone information as an indication of suitable prey abundance, and regulate their behavioural responses based on the changing trail pheromone component. The eavesdropping behaviour in ants therefore leads to an arms race between predator and prey where the species specific production of trail pheromones in termites is targeted by predatory ant species.
Data from: Variation in female mate preference in response to eavesdropping "interloper" males
Eavesdropping by conspecific males that are competing for mates has been demonstrated across a variety of taxa. However, few studies have investigated how eavesdropping may actually impact female mating decisions. Specifically, females may change their mating preferences based on whether the eavesdropping male varies in its phenotype (e.g., expression of condition-indicating secondary sexual characters or courtship vigor) relative to the male that initiated courtship. We examined variation in female preferences in the context of eavesdropping in the brush-legged wolf spider, Schizocosa ocreata. Female S. ocreata typically prefer males with large tufts and males that court at higher rates. In live mating trials, however, females preferentially mated with the males that courted first. It has yet to be investigated whether female preferences change when males of varying phenotypes are encountered sequentially, as might be expected in an eavesdropping context. We used video playback experiments to introduce females to a virtual courting male (initial male), followed by a second virtual courting male thirty seconds later (interloper male). We separately manipulated 2 aspects of male courtship (tuft size and courtship vigor) to measure female responses to an interloper male of lower, higher, or equal phenotypic expression. For both traits, females had an overall preference for the initial males. However, when the interloper male had large tufts or had high courtship vigor, female S. ocreata shifted the relative number of their receptivity displays. These results suggest that eavesdropping could be beneficial for interloper males, but the benefits may vary depending on the male's phenotype.
Data from: Breaking the cipher: ant eavesdropping on the variational trail pheromone of its termite prey
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Data from: Variation in female mate preference in response to eavesdropping "interloper" males
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Data from: Heterospecific eavesdropping in ant-following birds of the Neotropics is a learned behaviour
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Acoustically eavesdropping bat predators take longer to capture katydid prey signalling in aggregation
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Brain transcriptomic response to social eavesdropping in zebrafish
GEO Series GSE69719. Danio rerio. 12 samples. Type: Expression profiling by array.
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