Antennal Resolution of Pulsed Pheromone Plumes in Three Moth Species

Bau, Josep; Justus, Kristine A.; Cardé, Ring T.

doi:10.21236/ada399835

Cited by 12 publications

(15 citation statements)

References 16 publications

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“…The attraction range estimates differed slightly between the two field trials, with pine sawyer pheromone traps being larger in Portugal (123 m) than in France (92 m). This could be a result of warmer climatic conditions in Portugal, which may have increased both the release of pheromone (Bradley et al ., ) and its volatility, increasing the dispersion of the pheromone plume and thus the chance of beetles being recruited from further away (Bau et al ., ). Other environmental conditions, including stand and landscape structure, with an effect on prevailing winds and updrafts, particularly along the forest roads where traps were installed, also differed between the two locations and may have affected the flight and capture of beetles.…”

Section: Discussionmentioning

confidence: 97%

A novel, easy method for estimating pheromone trap attraction range: application to the pine sawyer beetle Monochamus galloprovincialis

Jactel

Bonifácio

Halder

et al. 2018

Agri and Forest Entomology

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1 Pheromone traps are widely used for monitoring or managing insect pest populations. However, it is important to know their range of attraction to optimize the setting of pheromone trap networks. 2 We propose an easy method based on the use of pairs of adjacent traps located at decreasing distance from each other. The range of attraction is deduced from the observation of reduced trap capture when the attraction range of two adjacent traps starts overlapping. The relationship between the relative trap capture and the distance between paired traps is fitted with a logistic curve. 3 To empirically test these predictions, we conducted trapping experiments with the beetle Monochamus galloprovincialis, the insect vector of the pine wood nematode. Fifteen pairs of traps separated by 25 to 300 m, in France, and 18 pairs of traps distant from 25 to 400 m, in Portugal, were installed in maritime pine plantation landscapes. 4 In both countries, the relative percentage of capture per trap per week was best fitted by a logistic model with two parameters. The estimated attraction ranges were 92 m (confidence interval = 62-211 m) in France and 123 m (confidence interval = 64-491 m) in Portugal. 5 The interference between paired traps thus provides a simple and robust method for estimating the attraction range of pheromone traps.

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Section: Discussionmentioning

confidence: 97%

A novel, easy method for estimating pheromone trap attraction range: application to the pine sawyer beetle Monochamus galloprovincialis

Jactel

Bonifácio

Halder

et al. 2018

Agri and Forest Entomology

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“…2014). Insect antennal olfactory receptor-neurons can track fast odorant fluctuations (Lemon and Getz, 1997;Bau et al, 2002;Hinterwirth et al, 2004;Schuckel et al, 2008;Kim et al, 2011;Getahun et al, 2012;, and insects use temporal stimulus-cues for segregating odor objects from the milieu of background odors (Baker et al, 1998;Fadamiro et al, 1999;Nikonov and Leal, 2002;Szyszka et al, 2012;Saha et al, 2013). Maintaining a high responsiveness and odorant pulse-tracking capacity of olfactory receptor neurons may be energetically expensive (Niven and Laughlin, 2008), and it may be adaptive to downregulate antennal responsiveness and pulse-tracking capacity at times of reduced vigilance or activity.…”

Section: Task-related Phasing Of Circadian Rhythms In Antennal Responmentioning

confidence: 99%

Task-Related Phasing of Circadian Rhythms in Antennal Responsiveness to Odorants and Pheromones in Honeybees

et al. 2017

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The insect antennae receive olfactory information from the environment. In some insects, it has been shown that antennal responsiveness is dynamically regulated by circadian clocks. However, it is unknown how general this phenomenon is and what functions it serves. Circadian regulation in honeybee workers is particularly interesting in this regard because they show natural task-related chronobiological plasticity. Forager bees show strong circadian rhythms in behavior and brain gene expression, whereas nurse bees tend brood around-the-clock and have attenuated circadian rhythms in activity and whole-brain gene expression. Here, we tested the hypothesis that there is task-related plasticity in circadian rhythms of antennal responsiveness to odorants in worker honeybees. We used electroantennogram (EAG) to measure the antennal responsiveness of nurses and foragers to general odorants and pheromones around the day. The capacity to track 10-Hz odorant pulses varied with time of day for both task groups but with different phases. The antennal pulse-tracking capacity was higher during the subjective day for the day-active foragers, whereas it was better during the night for around-the-clock active nurses. The task-related phases of pulse-tracking rhythms were similar for all the tested stimuli. We also found evidence for circadian rhythms in the EAG response magnitude of foragers but not of nurses. To the best of our knowledge, these results provide the first evidence for circadian regulation of antennal olfactory responsiveness and odorant pulse-tracking capacity in bees or any other hymenopteran insect. Importantly, our study shows for the first time that the circadian phase of olfactory responsiveness may be socially regulated.

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“…Neither full-winged nor wing-reduced stonefly antennae could resolve 10-Hz odorant fluctuations (Fig. S1, S2), indicating that antennal responses in stoneflies have a lower temporal resolution than antennal responses in more derived insect species (12, 34, 35), including honey bees (3) (Fig. S4).…”

Section: Resultsmentioning

confidence: 99%

Adaptive evolution of olfactory degeneration in recently flightless insects

Neupert

McCulloch

Foster

et al. 2020

Preprint

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12Fast-moving animals need fast-acting sensory systems. Flying insects have thus evolved exceptionally 13 quick visual (1) and olfactory processing ability (2). For example, flighted insects can track the temporal 14 structure of turbulent odor plumes at rates above 100 Hz (3). The evolutionary lability of such sensory 15 systems, however, remains unknown. We test for rapid evolutionary shifts in olfactory processing speed 16 associated with flight loss, through neurobiological comparisons of sympatric flighted versus flightless 17 lineages within a wing-polymorphic stonefly species. Our analyses of sensory responses reveal that 18 recently-evolved flightless lineages have substantially degraded olfactory acuity. By comparing flighted 19 versus flightless ecotypes with similar genetic backgrounds (4), we eliminate other confounding factors 20 that might have affected the evolution of their olfactory reception mechanisms. Our detection of 21 different patterns of degraded olfactory sensitivity and speed in independently wing-reduced lineages 22highlights parallel evolution of sensory degeneration. These reductions in sensory ability also echo the 23 rapid vestigialization of wings themselves (4, 5), and represent a neurobiological parallel to the 24 convergent phenotypic shifts seen under sharp selective gradients in other systems (e.g. parallel loss of 25 vision in diverse cave fauna (6)). Our study provides the first direct evidence for the hypothesis that 26flight poses a selective pressure on the speed of olfactory receptor neurons. Our findings also emphasize 27 the energetic costs of rapid olfaction, and the key role of natural selection in shaping dramatic 28 neurobiological shifts. 29 30 31Significance Statement 32Flying insects move fast and have therefore evolved exceptionally quick-acting sensory systems. The 33speed with which such neurobiological shifts can evolve, however, remains unclear. Under the 'use it 34 or lose it' hypothesis, loss of flight should lead to degradation of this fast sensory processing ability. 35 We test for evolutionary reductions in olfactory acuity linked to flight loss, through neurobiological 36 comparisons of flightless versus flighted lineages within a wing-polymorphic insect. Our analyses 37 reveal that newly wing-reduced populations have substantially degraded olfactory acuity, with parallel 38 reductions in this sensory ability detected in independently flightless lineages. These findings reveal 39 that flight poses strong selective pressure for rapid olfaction, and highlight the potential of natural 40 selection in rapidly shaping adaptive shifts in animal sensory systems. 41 42The origin of flight posed novel challenges for animals' sensory systems, including the need for rapid 43 processing of environmental information. Major sensory shifts were needed to compensate for the fact 44 that flying animals move faster and therefore experience more rapid changes in sensory stimuli (vision: 45 (7, 8); olfaction: (2)). This need for rapid sensing seems to be particularly ...

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Antennal Resolution of Pulsed Pheromone Plumes in Three Moth Species

Cited by 12 publications

References 16 publications

A novel, easy method for estimating pheromone trap attraction range: application to the pine sawyer beetle Monochamus galloprovincialis

A novel, easy method for estimating pheromone trap attraction range: application to the pine sawyer beetle Monochamus galloprovincialis

Task-Related Phasing of Circadian Rhythms in Antennal Responsiveness to Odorants and Pheromones in Honeybees

Adaptive evolution of olfactory degeneration in recently flightless insects

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