Results 41 to 50 of about 10,973 (244)
Olfactory conditioning of the proboscis extension in bumble bees
, 1999 The foraging behaviour of bumble bees is well documented for nectar and/or pollen gathering, but little is known about the learning processes underlying such behaviour.
Pham-Delegue, M. H. +13 more
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Acta Agriculturae Scandinavica. Section B, Soil and Plant Science, 2019 The study intended to compare repellency of three insecticides on bumble bees and honey bees in Norwegian red clover (Trifolium pratense L.) seed crops, and to examine effects of thiacloprid on bumble bee colony development in the field.
Lars T. Havstad +3 more
doaj +1 more source
Big bees do a better job : intraspecific size variation influences pollination effectiveness
, 2014 Funding: School of Biology, University of St AndrewsBumblebees (Bombus spp.) are efficient pollinators of many flowering plants, yet the pollen deposition performance of individual bees has not been investigated.
Finlayson, Kathryn +5 more
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Using respiratory physiology techniques in assessments of pesticide effects on bees
Julius-Kühn-Archiv, 2018 The determination of sub-lethal effects of pesticides on beneficial insects is challenging topic because the vast number of different possible endpoints. Traditionally measured endpoints reflect the basic outcome but do not give any information about the
Karise, Reet +3 more
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Compensation for wind drift by bumble-bees
, 1999 In his classic studies on honeybee navigation, von Frisch had to rely on qualitative visual observations of the bees' flight paths, but nevertheless reached the surprising conclusion that bees seem to anticipate lateral wind drift and compensate by ...
Osborne, J. L. +6 more
core +1 more source
Scientific Reports, 2021 Bees are critical for crop pollination, but there is limited information on levels and sources of pesticide exposure in commercial agriculture. We collected pollen from foraging honey bees and bumble bees returning to colonies placed in blooming ...
Kelsey K. Graham +6 more
doaj +1 more source
Local management and landscape effects on diversity of bees, wasps and birds in urban green areas [PDF]
, 2008 Today almost all ecosystems on Earth are directly or indirectly influenced by human activity. Most species occur in ecosystems that are managed by humans and only a small fraction of biodiversity exists in protected areas.
Ahrné, Karin
core
7000 Years of Aboriginal Mining at Sugarloaf Hill in the Riverland Region of South Australia
Archaeology in Oceania, EarlyView.ABSTRACT Silcrete and chert are commonly represented in Aboriginal archaeological lithic assemblages across large parts of the southwestern Murray‐Darling Basin (MDB). In South Australia (SA), these materials were sourced from a series of quarries located along the incised course of the Murray River through the upper Riverland region.
Craig Westell +8 more
wiley +1 more source
Effects of climate change on phenologies and distributions of bumble bees and the plants they visit
Ecosphere, 2016 Surveys of bumble bees and the plants they visit, carried out in 1974 near the Rocky Mountain Biological Laboratory in Colorado, were repeated in 2007, thus permitting the testing of hypotheses arising from observed climate change over the intervening 33‐
Graham H. Pyke +3 more
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Berichte zur Wissenschaftsgeschichte, EarlyView.Since late 2021, serious allegations have been made against physicist Erwin Schrödinger, ranging from pedophilia to serial sexual abuse. These accusations have significantly tarnished the Nobel Prize winner's public reputation. The ongoing debate has repeatedly raised the question of whether, and to what extent, these grave allegations are justified ...
Magdalena Gronau, Martin Gronau
wiley +1 more source