Infrared Absorption Characteristics of Culicoides sonorensis in Relation to Insect Age

Peiris, Kamaranga H. S.; Drolet, Barbara S.; Cohnstaedt, Lee W.; Dowell, Floyd E.

doi:10.7726/ajast.2014.1006

Cited by 12 publications

(12 citation statements)

References 27 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Third, refractive index increases the glossiness of dragonfly wings and alters the free spectral range of the fringes. In some Odonata species, newly emerged and immature individuals have glossy wings (Brydegaard, 2015), and there are indications that age is related to refractive index for, for example, Anopheles gambiae (Mayagaya et al, 2009;Peiris, Drolet, Cohnstaedt, & Dowell, 2014). As the compound eyes of Odonata look directly into the sun simultaneously as they would see a specular reflection, information on the angular difference is available to them and therefore also the Brewster angle and the refractive index.…”

Section: Con Clus I On and Per S Pec Tive Smentioning

confidence: 99%

Can the narrow red bands of dragonflies be used to perceive wing interference patterns?

Brydegaard

Jansson

Schulz

et al. 2018

Ecology and Evolution

View full text Add to dashboard Cite

Despite numerous studies of selection on position and number of spectral vision bands, explanations to the function of narrow spectral bands are lacking. We investigate dragonflies (Odonata), which have the narrowest spectral bands reported, in order to investigate what features these narrow spectral bands may be used to perceive. We address whether it is likely that narrow red bands can be used to identify conspecifics by the optical signature from wing interference patterns (WIPs). We investigate the optical signatures of Odonata wings using hyperspectral imaging, laser profiling, ellipsometry, polarimetric modulation spectroscopy, and laser radar experiments. Based on results, we estimate the prospects for Odonata perception of WIPs to identify conspecifics in the spectral, spatial, intensity, polarization, angular, and temporal domains. We find six lines of evidence consistent with an ability to perceive WIPs. First, the wing membrane thickness of the studied Odonata is 2.3 μm, coinciding with the maximal thickness perceivable by the reported bandwidth. Second, flat wings imply that WIPs persist from whole wings, which can be seen at a distance. Third, WIPs constitute a major brightness in the visual environment only second after the solar disk. Fourth, WIPs exhibit high degree of polarization and polarization vision coincides with frontal narrow red bands in Odonata. Fifth, the angular light incidence on the Odonata composite eye provides all prerequisites for direct assessment of the refractive index which is associated with age. Sixth, WIPs from conspecifics in flight make a significant contribution even to the fundamental wingbeat frequency within the flicker fusion bandwidth of Odonata vision. We conclude that it is likely that WIPs can be perceived by the narrow red bands found in some Odonata species and propose future behavioral and electrophysiological tests of this hypothesis.

show abstract

Section: Con Clus I On and Per S Pec Tive Smentioning

confidence: 99%

Can the narrow red bands of dragonflies be used to perceive wing interference patterns?

Brydegaard

Jansson

Schulz

et al. 2018

Ecology and Evolution

View full text Add to dashboard Cite

show abstract

“…Therefore, the inherent frequency content of insect wing beating may easily exceed 30 kHz. Glossy wings can for some species be associated with age groups …”

Section: Detection and Light Interactions With Aquatic‐ And Aerofaunamentioning

confidence: 99%

“…In the thermal IR (TIR), high‐power (W‐kW) CO 2 gas lasers can be acquired at 10.6 μm for decent costs. In the middle IR (MIR), several absorption features from waxes and lipids can be encountered; these have been demonstrated for classification of species and age groups in FTIR studies. The periodicity of the ordered microstructure of plumage have been demonstrated to resonate and produce iridescent features in the MIR, essentially for any species .…”

Section: Detection and Light Interactions With Aquatic‐ And Aerofaunamentioning

confidence: 99%

Photonic Monitoring of Atmospheric and Aquatic Fauna

Brydegaard

Svanberg

2018

Laser & Photonics Reviews

View full text Add to dashboard Cite

Flying insects are of utmost importance in ecology and for human living conditions. Certain species serve as indispensable pollinators to ensure the availability of food stuffs, while others are dangerous vectors for spreading deadly diseases, such as malaria. Agricultural pests reduce the yield of crops, and their abatement through pesticides cause many additional problems. Birds and bats are frequently carriers of diseases, which, especially for long‐distance migrants, cause serious consequences. Clearly, there is high motivation to be able to effectively identify and quantify flying fauna. Here, the emerging field of optics and laser‐based monitoring of flying fauna is reviewed with an emphasis on remote sensing based on pulsed and contineous wave (CW) lidar systems, and how they complement existing radar techniques. Furthermore, ground‐truth laboratory studies are covered. Wing‐beat and overtone spectra as well as reflectance, depolarization and fluorescence properties are studied. The aquatic environment is for many reasons less accessible for optical studies, but is clearly also of great importance. Phytoplankton constitute the start of the aquatic food chain, followed by zooplankton and a long chain of higher animals, including fish, an important part of the human food supply. Finally, how optical monitoring can complement sonar and sampling techniques is discussed.

show abstract

“…In bio-photonics, glittering and matte properties are associated with the refractive index and the de-polarization ratio. So far optical insect age assessment has been pursued in laboratory settings [14,15], but in principle assessment could be achieved remotely.…”

Section: Classification and Information In Oscillatory Particlesmentioning

confidence: 99%

SUPER RESOLUTION LASER RADAR WITH BLINKING ATMOSPHERIC PARTICLES ---- APPLICATION TO INTERACTING FLYING INSECTS (Invited Paper)

Brydegaard¹,

Gebru²,

Svanberg³

2014

PIER

View full text Add to dashboard Cite

Abstract-Assessment of biodiversity of pollinators on the landscape scale or estimation of fluxes of disease-transmitting biting midges constitutes a major technical challenge today. We have developed a laser-radar system for field entomology based on the so called Scheimpflug principle and a continuouswave laser. The sample-rate of this method is unconstrained by the round-trip time of the light, and the method allows assessment of the fast oscillatory insect wing-beats and harmonics over kilometers range, e.g., for species identification and relating abundances to the topography. Whereas range resolution in conventional lidars is limited by the pulse duration, systems of the Scheimpflug type are limited by the diffraction of the telescopes. However, in the case of sparse occurrence of the atmospheric insects, where the optical cross-section oscillates, estimation of the range and spacing between individuals with a precision beyond the diffraction limit is now demonstrated. This enables studies of insect interaction processes in-situ. REMOTE OPTICAL IN-SITU INSECT MONITORINGAlthough tiny in size, the massive number of insects makes them play a key role in most eco-systems around the globe. While the Western world experiences significant economic losses in agriculture due to lack of biodiversity and the colony collapse disorder of pollinators [1], disease vectors and pests are feared and, to a great extent, blamed for stagnating the development in tropical parts of the world.Whereas birds can be ring marked or tracked via GPS or sun loggers, only the very largest and least abundant insects can be equipped with electronic tags [2,3]. While research in the area of radar entomology has been conducted over several decades and numerous interesting applications have been described [4], laser radar (light detection and ranging; lidar) systems in the optical regime have the potential of achieving a far better sensitivity and address and classify even the tiniest insects, simply because most insects are much smaller than the wavelengths of microwaves used in radars but larger than the wavelengths of light. Further, optical off-the-shelf components allow spectral-and polarimetric target classification, providing molecular as well as microstructure information [5,6]. Along these lines our group has previously demonstrated lidar remote detection of insects labeled with fluorescent powders, e.g., for assessing dispersal rates on a landscape scale [7,8].Today a major limitation in ecological entomology is that insect abundance assessment is based on sweep nets, light-, pheromone-or CO 2 -traps. Placing and emptying the traps are tedious operations and constitute a major effort, and the results are known to be biased with respect to the species, sexes and age groups caught. Although trapping allows precise studies with microscopes, mass spectrometry

show abstract

Infrared Absorption Characteristics of Culicoides sonorensis in Relation to Insect Age

Cited by 12 publications

References 27 publications

Can the narrow red bands of dragonflies be used to perceive wing interference patterns?

Can the narrow red bands of dragonflies be used to perceive wing interference patterns?

Photonic Monitoring of Atmospheric and Aquatic Fauna

SUPER RESOLUTION LASER RADAR WITH BLINKING ATMOSPHERIC PARTICLES ---- APPLICATION TO INTERACTING FLYING INSECTS (Invited Paper)

Contact Info

Product

Resources

About