Results 41 to 50 of about 16,367 (180)

Sperm viability in the male accessory testes and female spermathecae of the bumblebee Bombus terrestris (Hymenoptera: Apidae)

European Journal of Entomology, 2008
In many species sperm competition selects for large ejaculates while females eliminate or disable a high percentage of the spermatozoa in their storage organs in order to control paternity.
Michael GREEFF, Paul SCHMID-HEMPEL
doaj   +1 more source

Colony‐level pollen collection reflects visitation of managed bumble bees (Bombus impatiens) in strawberry fields and surrounding landscapes without reducing pollen limitation

Agricultural and Forest Entomology, EarlyView.
We extracted pollen from colony beeswax to quantify season‐long, colony‐level resource use and tested how managed Bombus impatiens visitation and Rosaceae pollen collection relate to landscape context and strawberry pollination. Increased managed bumble bee visitation was not influenced by surrounding landcover, did not reduce pollen limitation and ...
Leeah I. Richardson, Olivia Miller, David Sossa, Aaron Iverson, Scott McArt, Katja Poveda, Heather Grab   +6 more
wiley   +1 more source

A failed invasion? Commercially introduced pollinators in Southern France [PDF]

, 2009
The natural diversity of Bombus terrestris subspecies could be under threat from the commercialisation of bumblebees. Therefore, to determine whether commercially imported bumblebees are able to establish and spread, we carried out
Rasmont, P, Lars Chittka, Pierre Rasmont, Ings, Nicola L., Chittka, Lars, Chittka, L, Ings, NL, Thomas C. Ings, Chittka, L., Ings, Thomas C., Nicola L. Ings, Ings, T.C., Rasmont, Pierre, Ings, TC, Ings, N.L.   +14 more
core   +1 more source

Bumblebee (Hymenoptera: Apidae) sample storage for a posteriori molecular studies: Interactions between sample storage and DNA-extraction techniques

European Journal of Entomology, 2013
A global decline in pollinator abundance and diversity has demanded increased research attention to the ecology and genetics of bumblebees. However, as progressively more restrictions are placed on sampling for insects, researchers are increasingly ...
António S. MOREIRA, Finbarr G. HORGAN, Tomás E. MURRAY, Thomais KAKOULI-DUARTE   +3 more
doaj   +1 more source

The dual crisis: Climate change simultaneously drives pollinator decline and pest outbreaks

Agricultural and Forest Entomology, EarlyView.
Climate change acts as an asymmetric ecological filter, favouring r‐selected pest traits (rapid reproduction, generalism) while disadvantaging K‐selected pollinators. For every 1°C of warming, bee species richness declines ~25% since the 1990s, while pest‐induced crop losses increase by 10%–25%. A network‐centric approach integrating climate‐responsive
Diriba Fufa Serdo
wiley   +1 more source

Extreme Food-Plant Specialisation in Megabombus Bumblebees as a Product of Long Tongues Combined with Short Nesting Seasons [PDF]

, 2015
© 2015 Huang et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Jiandong An (178647), Huang Jiaxing, Jie Wu, Wu, J, Jiaxing Huang (178661), Jie Wu (10038), An, J, Wu Jie, Williams, PH, Paul H. Williams, An Jiandong, Jiaxing Huang, Huang, J, Paul H. Williams (178643), Jiandong An, Paul H Williams, Williams Paul H.   +16 more
core   +2 more sources

Distribution and pollination services of wild bees and hoverflies along an altitudinal gradient in mountain hay meadows

Ecology and Evolution, 2021
Extensively managed and flower‐rich mountain hay meadows, hotspots of Europe's biodiversity, are subject to environmental and climatic gradients linked to altitude.
Kevin Baumann, Julia Keune, Volkmar Wolters, Frank Jauker   +3 more
doaj   +1 more source

Comparing time‐lapse photography and traditional human observation in collecting crop pollinator visitation data Ajastetun valokuvauksen ja perinteisen suoran havainnoinnin vertailu kerättäessä tietoa pölyttäjien kukkakäynneistä viljelykasveilla

Agricultural and Forest Entomology, EarlyView.
Time‐lapse photography with commercially available trail cameras provides a competitive alternative to direct human observations for documenting pollinator flower visits, but its performance varies between crops. In apple, the cameras recorded more diverse pollinator assemblages than the human observer due to larger temporal coverage of the camera ...
Marjaana Toivonen, Paula Humberg
wiley   +1 more source

Winter Active Bumblebees (Bombus terrestris) Achieve High Foraging Rates in Urban Britain [PDF]

, 2010
BackgroundForaging bumblebees are normally associated with spring and summer in northern Europe. However, there have been sightings of the bumblebee Bombus terrestris during the warmer winters in recent years in southern England.
Carlton, M, Ralph J Stelzer, Stelzer, RJ, Lars Chittka, Thomas C Ings, Chittka, L, Marc Carlton, Ings, TC   +7 more
core   +1 more source

Genetic variation in Turkish honeybees Apis mellifera anatoliaca, A. m. caucasica, A. m. meda (Hymenoptera: Apidae) inferred from RFLP analysis of three mtDNA regions (16S rDNA-COI-ND5)

European Journal of Entomology, 2012
In this study, the genetic structure of Turkish honey bee (Apis mellifera L.) populations, mainly obtained from the Central Anatolian region, were investigated at three different mitochondrial regions.
Fulya ÖZDIL, Ibrahim AYTEKIN, Fatma ILHAN, Saim BOZTEPE   +3 more
doaj   +1 more source