Results 81 to 90 of about 2,462 (213)

Corpus allatum volume-dependent differences in accessory gland maturation in long- and short-winged males of Pyrrhocoris apterus (Heteroptera: Pyrrhocoridae)

open access: yesEuropean Journal of Entomology, 2006
In the present study the temporal changes in the volume of the corpus allatum in three experimental groups of adult males (macropterous, reproductive brachypterous and diapausing brachypterous) of the flightless bug Pyrrhocoris apterus were determined ...
Radomír SOCHA, Magdalena HODKOVÁ
doaj   +1 more source

A damping circadian clock drives weak oscillations in metabolism and locomotor activity of aphids (Acyrthosiphon pisum) [PDF]

open access: yes, 2017
Timing seasonal events, like reproduction or diapause, is crucial for the survival of many species. Global change causes phenologies worldwide to shift, which requires a mechanistic explanation of seasonal time measurement.
Arrazola Sastre, Alazne   +4 more
core   +3 more sources

Body mass, temperature, and pathogen intensity differentially affect critical thermal maxima and their population‐level variation in a solitary bee

open access: yesEcology and Evolution, Volume 14, Issue 2, February 2024.
This study evaluates how body mass, local climate, and pathogen intensity influence heat tolerance and its population‐level variation among individuals of the solitary bee Xenoglossa pruinosa. We did not find evidence of microclimate predicting mean heat tolerance in X.
Laura J. Jones   +3 more
wiley   +1 more source

Sexual activity in macropterous and brachypterous males of a flightless bug, Pyrrhocoris apterus (Heteroptera)

open access: yesEuropean Journal of Entomology, 2001
The long-winged (macropterous) and short-winged (brachypterous) adult males of Pyrrhocoris apterus (L.) from temperate (Czech Republic) and Mediterranean (Israel) populations were analysed for the sexual activity and the functional activity of their ...
Radomír SOCHA   +2 more
doaj   +1 more source

Применение метода геометрической морфометрии для оценки флуктуации морфометрических показателей формы тела клопа-солдатика (Pyrrhocoris apterus L.) из природных популяций Шебекинского района Белгородской области [PDF]

open access: yes, 2012
Представлен результат экологического анализа изменчивости морфометрических показателей тела клопа-солдатика с использованием метода геометрической морфометрии.
Батлуцкая, И. В.   +4 more
core   +1 more source

MAPHIS—Measuring arthropod phenotypes using hierarchical image segmentations

open access: yesMethods in Ecology and Evolution, Volume 15, Issue 1, Page 36-42, January 2024.
Abstract Animal phenotypic traits are utilised in a variety of studies. Often the traits are measured from images. The processing of a large number of images can be challenging; nevertheless, image analytical applications, based on neural networks, can be an effective tool in automatic trait collection.
Radoslav Mráz   +4 more
wiley   +1 more source

Показатели половой структуры насекомых в системе экологического мониторинга (на примере природных популяций клопа-солдатика (Pyrrhocoris apterus L.)) [PDF]

open access: yes, 2011
В статье представлены результаты шестилетнего изучения показателей половой структуры популяций клопа-солдатика, населяющего различные биотопы Белгородской ...
Батлуцкая, И. В.   +2 more
core   +1 more source

Crustacean red pigment-concentrating hormone Panbo-RPCH affects lipid mobilization and walking activity in a flightless bug Pyrrhocoris apterus (Heteroptera) similarly to its own AKH-peptides

open access: yesEuropean Journal of Entomology, 2007
In the present study we tested whether the walking activity of macropterous females of the flightless wing-polymorphic bug Pyrrhocoris apterus (L.) can be stimulated by its native adipokinetic hormone Peram-CAH-II and the crustacean red pigment ...
Radomír SOCHA   +2 more
doaj   +1 more source

Изменчивость биоиндикационных признаков клопа-солдатика (Pyrrhocoris apterus L.), обитающего на территории расположения опытно-экспериментальной установки по производству лизина в Шебекинском районе Белгородской области [PDF]

open access: yes, 2012
Приведен сравнительный анализ информационно-значимых показателей индикационных признаков клопа-солдатика из популяций, испытывающих разный уровень антропогенной нагрузки.
Батлуцкая, И. В.   +3 more
core   +1 more source

Los estudios morfológicos en la teoría de la determinación cromosómica del sexo : 1880-1912 [PDF]

open access: yes, 2003
En el presente trabajo se analizan las investigaciones morfológicas comenzadas a finales del siglo XIX alrededor del tema de la determinación del sexo, hasta el descubrimiento de cromosomas sexuales y la formulación de la teoría de la determinación ...
Delgado Echevarría, Isabel
core   +2 more sources

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