Results 101 to 110 of about 341,884 (242)

Spectral Characterization of the Life Stages and Physiological Responses of Diatraea saccharalis Fabricius (Lepidoptera: Crambidae) Larvae Parasitized by Cotesia flavipes Cameron (Hymenoptera: Braconidae)

open access: yesEntomologia Experimentalis et Applicata, EarlyView.
Hyperspectral proximal sensing was used to characterize the life stages and physiological responses of Diatraea saccharalis and to detect parasitism by Cotesia flavipes. Distinct spectral signatures differentiated eggs, larval instars, pupae, and adults, as well as live, dead, and parasitized larvae.
Souradji I. Bachirou   +3 more
wiley   +1 more source

Life history correlates of adult size in the malaria vector Anopheles darlingi

open access: yesMemorias do Instituto Oswaldo Cruz, 1995
Adult dry weights of laboratory-reared Anopheles darlingi were highly correlated with wing lengths, which were used to estimate size variation in natural populations of this species.
L. P. Lounibos   +3 more
doaj   +1 more source

Morphological variation and sex-biased frequency of wing dimorphism in the pygmy grasshopper Tetrix subulata (Orthoptera: Tetrigidae)

open access: yes, 2013
Dimorphism in wing length is well known in many insect species. It is generally believed that a trade-off between dis- persal and reproduction exists, with the long-winged (LW) morph being a better disperser due to its superior flight capability.
A. Steenman, A. Lehmann, G. Lehmann
semanticscholar   +1 more source

Sex differences in 20-hydroxyecdysone hormone levels control sexual dimorphism in Bicyclus anynana butterfly wing patterns

open access: yesbioRxiv, 2017
In contrast to the important role of hormones in the development of sexual dimorphic traits in vertebrates [1], the differentiation of these traits in insects is attributed exclusively to variation in cell-autonomous mechanisms controlled by members of ...
S. Bhardwaj   +8 more
semanticscholar   +1 more source

Flooding affects fluctuating asymmetry but not growth of a riparian orbweaving spider

open access: yesEcological Entomology, EarlyView.
In a mesocosm experiment we assessed the impact of flood on aquatic insect emergence and on spider development using geometric morphometric analysis of fluctuating asymmetry. We observed 45% higher emergence in flooded mesocosm throughout the season. Spiders did not grow bigger but exhibited ~15% lower fluctuating asymmetry than in controls.
Stephane Mutel   +10 more
wiley   +1 more source

Stable isotopes reveal dietary divergence between dispersal phenotypes in Tetrix subulata pygmy grasshoppers (Orthoptera: Tetrigidae)

open access: yesEuropean Journal of Entomology, 2013
In some species of insects, individuals with fully developed wings and capable of flying coexist with flightless individuals that lack functional wings.
Einat KARPESTAM, Anders FORSMAN
doaj   +1 more source

When Similar Individuals Don't Attract: Absence of Assortative Mating by Coloration in a Damselfly With Honest Signaling

open access: yesEthology, EarlyView.
In Acanthagrion lancea damselflies, both sexes display blue ornamentation, but do they choose mates based on it? We tested whether mutual mate choice and time constraints influence ornament evolution. Blue coloration correlated with individual quality, but individuals did not choose mates based on color, and this was unaffected by time constraints over
Maria C. A. Melillo   +3 more
wiley   +1 more source

Correlated traits for dispersal pattern: Terrestrial movement of the water cricket Velia caprai (Heteroptera: Gerromorpha: Veliidae)

open access: yesEuropean Journal of Entomology, 2009
Macropterous individuals of wing polymorphic semiaquatic bugs (Heteroptera: Gerromorpha) usually occur at a high frequency if there is a need to leave an unfavorable habitat or in a generation migrating to/from an overwintering site.
Tomáš DITRICH, Miroslav PAPÁČEK
doaj   +1 more source

Sexual dimorphism and population differentiation in the Chilean Neotropical moth Macaria mirthae (Lepidoptera, Geometridae): a wing geometric morphometric example

open access: yes, 2017
Sexual shape dimorphism is the differentiation of male and female organisms based on their shape variation; this definition was proposed for the use of geometric morphometrics analysis where the geometric features of the shape are analyzed without the ...
H. Benítez, H. Vargas
semanticscholar   +1 more source

MOESM1 of Comparative transcriptomic analysis of a wing-dimorphic stonefly reveals candidate wing loss genes

open access: yes, 2019
Additional file 1: Table S1. Recent studies examining the genetic basis for wing development in Pterygota. Table S2. Descriptive statistics for Zelandoperla fenestrata notum transcriptome. Table S3. Annotation statistics for Zelandoperla fenestrata notum transcriptome.
McCulloch, Graham   +5 more
openaire   +1 more source

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