Results 181 to 190 of about 19,257 (213)
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Demographic Consequences of Drift in Contiguous Hives of Bombus terrestris
Journal of Economic Entomology, 2007The objective of this experiment was 1) to quantify drift between bumblebee, Bombus terrestris L., colonies when hives are vertically stacked; and 2) to measure the impact of drift on the colony growth. The experiment was conducted outside, in an open area, at three sites with one stack of three colonies per site.
Lefebvre, Diane, Pierre, Jacqueline
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Structural and functional analysis of aquaporins in Bombus terrestris
International Journal of Biological MacromoleculesBombus terrestris are efficient pollinators in forestry and agriculture, with higher cold tolerance than other bees. Yet, their cold tolerance mechanism remains unclear. Aquaporins (AQPs) function as cell membrane proteins facilitating rapid water flow, aiding in osmoregulation.
Xiaomei, Ma +6 more
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Fertility signals in the bumblebee Bombus terrestris (Hymenoptera: Apidae)
Naturwissenschaften, 2008In 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
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Isolation and characterization of chitin from bumblebee (Bombus terrestris)
International Journal of Biological Macromolecules, 2007Insect 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
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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
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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
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Development and Reproductive Strategies in Bombus Terrestris Colonies
Behaviour, 1988The development and the reproductive output of 26 Bombus terrestris colonies were investigated. Four important points in colony development are distinguished. These are: a) the start of egg laying by the queen, leading to the beginning of the eusocial phase, the emergence of the first workers; b) the moment which we term the switch point, at which the ...
M.J. Duchateau, H.H.W. Velthuis
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2021
???????????????? ?????????? ?????????????????????? ?????????????????????????? ?????????????????????????? ???????????????? ?????????????????? ?????????? (Apis mellifera) ?????? ???????????????????? ???????????????? ?????????????? ???????????? Bombus terrestris ?????? ???????????? ?????????????? ???????????? ???????????????????? ??????????.
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???????????????? ?????????? ?????????????????????? ?????????????????????????? ?????????????????????????? ???????????????? ?????????????????? ?????????? (Apis mellifera) ?????? ???????????????????? ???????????????? ?????????????? ???????????? Bombus terrestris ?????? ???????????? ?????????????? ???????????? ???????????????????? ??????????.
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Bombus arısı (Bombus terrstris) yetiştiriciliği üzerine araştırmalar
2020Tez (Doktora) -- Çukurova Üniversitesi, Adana, 1997.
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Homing ability of the bumblebee, Bombus terrestris [PDF]
, 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 ...
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The Bombus-terrestris bee optimization algorithm for feature selection
Applied Intelligence, 2022Jafar Tanha, Zahra Zarei
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