Results 31 to 40 of about 133,767 (283)

The genomes of two key bumblebee species with primitive eusocial organization [PDF]

open access: yes, 2015
Background: The shift from solitary to social behavior is one of the major evolutionary transitions. Primitively eusocial bumblebees are uniquely placed to illuminate the evolution of highly eusocial insect societies.
Amdam, Gro V.   +143 more
core   +16 more sources

Removal of clay by stingless bees: load size and moisture selection [PDF]

open access: yesAnais da Academia Brasileira de Ciências, 2014
Some organisms disperse energy, associated with the transportation of resource, which is not necessarily food. Stingless bees of Central Amazonia (Melipona flavolineata and M. lateralis) collect clay in banks along streams for nest building. The moisture of the clay varies along the bank, and bees collect clay from specific location, indicating that ...
openaire   +7 more sources

Results of international standardised beekeeper surveys of colony losses for winter 2012-2013 : analysis of winter loss rates and mixed effects modelling of risk factors for winter loss. [PDF]

open access: yes, 2014
This article presents results of an analysis of winter losses of honey bee colonies from 19 mainly European countries, most of which implemented the standardised 2013 COLOSS questionnaire.
Aivar Raudmets   +27 more
core   +1 more source

Expermental Studies of quantitative evaluation using HPLC and safety of Sweet Bee Venom

open access: yesJournal of Pharmacopuncture, 2007
Objectives : This study was conducted to carry out quantitative evaluation and safety of Sweet Bee Venom. Methods : Content analysis was done using HPLC, measurement of LD50 was conducted intravenous, subcutaneous, and intra-muscular injection to the ...
Ki Rok Kwon   +5 more
doaj   +1 more source

The bee sting and the eye: A case report of an ab-externo sting removal technique

open access: yesAfrican Vision and Eye Health, 2019
Bee stings are a rare form of ocular trauma with the ocular sequelae attributable to the mechanical effects of the stinger as well as the inflammatory and neurotoxic effects of the venom.
Roland Höllhumer
doaj   +1 more source

The dose makes the poison: have “field realistic” rates of exposure of bees to neonicotinoid insecticides been overestimated in laboratory studies? [PDF]

open access: yes, 2014
Recent laboratory based studies have demonstrated adverse sub-lethal effects of neonicotinoid insecticides on honey bees and bumble bees, and these studies have been influential in leading to a European Union moratorium on the use of three neonicotinoids,
BARON G L   +16 more
core   +1 more source

Getting more than a fair share: nutrition of worker larvae related to social parasitism in the Cape honey bee Apis mellifera capensis [PDF]

open access: yes, 2002
Besides activation of ovaries and thelytokous reproduction of Cape workers, larval nutrition is an important aspect in parasitism of the African honey bee.
Allsopp, M.H.   +3 more
core   +2 more sources

Anarchy in the UK: Detailed genetic analysis of worker reproduction in a naturally occurring British anarchistic honeybee, Apis mellifera, colony using DNA microsatellites [PDF]

open access: yes, 2002
Anarchistic behaviour is a very rare phenotype of honeybee colonies. In an anarchistic colony, many workers’ sons are reared in the presence of the queen. Anarchy has previously been described in only two Australian colonies.
Arnold G   +25 more
core   +1 more source

Africanized honey bees are efficient at detecting, uncapping and removing dead brood

open access: yesGenetics and Molecular Research, 2009
The hygienic behavior of honey bees is based on a two-step process, including uncapping and removing diseased, dead, damaged, or parasitized brood inside the cell. We evaluated during periods of 1 h the time that hygienic and non-hygienic colonies of Africanized honey bees spend to detect, uncap and remove pin-killed brood using comb inserts with ...
M M, Morais   +4 more
openaire   +2 more sources

Hygienic behaviour in Brazilian stingless bees

open access: yesBiology Open, 2016
Social insects have many defence mechanisms against pests and pathogens. One of these is hygienic behaviour, which has been studied in detail in the honey bee, Apis mellifera.
Hasan Al Toufailia   +4 more
doaj   +1 more source

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