Results 181 to 190 of about 5,678 (218)

Mouthparts of the bumblebee ( Bombus terrestris) exhibit poor acuity for the detection of pesticides in nectar

, 2023
Parkinson RH, Scott J, Dorling AL, Jones H, Haslam M, McDermott-Roberts AE, Wright GA.   +6 more
europepmc   +1 more source

Bombus terrestris Complementary Sex Determiner (BtCSD) is identified as a conserved hymenopteran sex determination region: evolution, breeding, and conservation implications

Leung K, Becker F, Šima P, Kreskóci R, Geuverink E, Groot TVM, Pannebakker BA, van den Heuvel J.   +7 more
europepmc   +1 more source

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Heritability of sperm length in the bumblebee Bombus terrestris

Genetica, 2006
Sperm length is highly variable, both between and within species, but the evolutionary significance of this variation is poorly understood. Sexual selection on sperm length requires a significant additive genetic variance, but few studies have actually measured this.
Baer, Boris C., De Jong, Gerdien, Schmid-Hempel, Regula, Schmid-Hempel, Paul, Hoeg, Jens T., Boomsma, Jacobus J. Koos   +5 more
openaire   +3 more sources

The final moments of landing in bumblebees, Bombus terrestris

Journal of Comparative Physiology A, 2016
In comparison to other insects, like honeybees, bumblebees are very effective pollinators. Even though landing is a crucial part of pollination, little is known about how bumblebees orchestrate the final, critical moments of landing. Here, we use high-speed recordings to capture the fine details of the landing behaviour of free-flying bumblebees ...
Therese, Reber, Emily, Baird, Marie, Dacke   +2 more
openaire   +2 more sources

Learning of geometry and features in bumblebees (Bombus terrestris).

Journal of Comparative Psychology, 2013
Bumblebees (Bombus terrestris) were trained to find one of the four exit holes located in the corners of an enclosed environment with a distinctive geometry (a rectangular cage). Panels located at the corners provided nongeometric, featural cues. Between trials bumblebees were passively disoriented to disable dead reckoning.
Potrich D., Vallortigara G., SOVRANO V. A.   +2 more
openaire   +4 more sources

Demographic Consequences of Drift in Contiguous Hives of Bombus terrestris

Journal of Economic Entomology, 2007
The 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
openaire   +3 more sources

Structural and functional analysis of aquaporins in Bombus terrestris

International Journal of Biological Macromolecules
Bombus 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, Xinya, Chang, Geyuan, Liu, Qing, Han, Haoqin, Ke, Bingzhong, Ren, Yinliang, Wang   +6 more
openaire   +2 more sources

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, Katarína, Bíliková, Oskar, Markovic, Ján, Gróf, Grigorij, Kogan, Jozef, Simúth   +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, C, Schulz, R, Twele, W, Francke, M, Ayasse   +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