Results 151 to 160 of about 3,288 (181)
Some of the next articles are maybe not open access.

Isolation and characterization of chitin from bumblebee (Bombus terrestris)

International Journal of Biological Macromolecules, 2007
Insect chitin possessing shell-like structure was prepared from the bumblebee corpses by a consequent treatment with 1M HCl and 1M NaOH. The bumblebee chitin was compared with crustacean (shrimp) chitin by using elemental analysis, Fourier-transform infrared (FT-IR) and solid-state (13)C cross-polarization magic angle spinning nuclear magnetic ...
Juraj, Majtán   +5 more
openaire   +2 more sources

Fertility signals in the bumblebee Bombus terrestris (Hymenoptera: Apidae)

Naturwissenschaften, 2008
In eusocial Hymenoptera, queen control over workers is probably inseparable from the mechanism of queen recognition. In primitively eusocial bumblebees (Bombus), worker reproduction is controlled not only by the presence or absence of a dominant queen but also by other dominant workers.
A, Sramkova   +4 more
openaire   +2 more sources

The degree of parasitism of the bumblebee (Bombus terrestris) by cuckoo bumblebees (Bombus (Psithyrus) vestalis)

Insectes Sociaux, 2010
Host–parasite systems are characterised by coevolutionary arms races between host and parasite. Parasites are often the driving force, as they replicate much faster than their hosts and have shorter generation times and larger population sizes, resulting in higher mutation rates per time interval.
S. Erler, H. M. G. Lattorff
openaire   +1 more source

?????????????? ?????????????????? ?????????? ?? ?????????????????????????? ????????????????, ?????????????????? ???? ?????????? ?????????? Bombus terrestris ?? ?????????????? ???????????? Apis mellifera

2021
???????????????? ?????????? ?????????????????????? ?????????????????????????? ?????????????????????????? ???????????????? ?????????????????? ?????????? (Apis mellifera) ?????? ???????????????????? ???????????????? ?????????????? ???????????? Bombus terrestris ?????? ???????????? ?????????????? ???????????? ???????????????????? ??????????.
openaire   +1 more source

Specialist Bombus vestalis and generalist Bombus bohemicus use different odour cues to find their host Bombus terrestris

Animal Behaviour, 2010
Cuckoo bumblebees (subgenus Psithyrus) are social parasites in colonies of their host bumblebee species (Bombus). In spring, parasitic females awaken from hibernation and start searching for established host nests. Some Psithyrus species are specialized on one host species, whereas generalists parasitize several species.
Kirsten Kreuter   +3 more
openaire   +1 more source

Impact of a perfluorinated organic compound PFOS on the terrestrial pollinator Bombus terrestris (Insecta, Hymenoptera)

Ecotoxicology, 2011
Perfluorinated organic chemicals like perfluorooctane sulfonic acid (PFOS) are persistent environmental pollutants that have been measured in a great diversity of wildlife worldwide, especially in the aquatic compartment. However, little information is available on the presence and effects of PFOS in the terrestrial compartment.
Mommaerts, Veerle   +6 more
openaire   +4 more sources

Homing ability of the bumblebee, Bombus terrestris [PDF]

open access: possible, 2008
The ability of bumblebees to locate their nest site following artificial displacement was investigated. Bombus terrestris (Hymenoptera: Apidae) workers were marked with numbered tags and displaced up to 15 km from their nest. Bees returned from distances of up to 9.8 km, with the proportion of bees returning declining with distance of the release site ...
openaire  

The Bombus-terrestris bee optimization algorithm for feature selection

Applied Intelligence, 2022
Jafar Tanha, Zahra Zarei
openaire   +1 more source

Acetamipridin Bombus (Bombus terrestris L.) Arılarında Kuluçka Gelişimi Üzerine Etkisi

2020
Son yıllarda yabani ve yönetilen arıların populasyonlarının azalışında tarımda kullanılan pestisitlerin etkisinin olduğu bilinmektedir. Acetamiprid etken maddeli bitki koruma ürünleri örtü altı yetiştiricilikte zararlı böceklerle mücadelede yaygın şekilde kullanılmaktadır.
BULUŞ, İsmail Yaşhan   +3 more
openaire   +1 more source

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