نتایج جستجو برای: apis melifera

تعداد نتایج: 10145  

Journal: :Science 2006
Charles W Whitfield Susanta K Behura Stewart H Berlocher Andrew G Clark J Spencer Johnston Walter S Sheppard Deborah R Smith Andrew V Suarez Daniel Weaver Neil D Tsutsui

We characterized Apis mellifera in both native and introduced ranges using 1136 single-nucleotide polymorphisms genotyped in 341 individuals. Our results indicate that A. mellifera originated in Africa and expanded into Eurasia at least twice, resulting in populations in eastern and western Europe that are geographically close but genetically distant. A third expansion in the New World has invo...

Journal: :Philosophical transactions of the Royal Society of London. Series B, Biological sciences 2011
P Kraft C Evangelista M Dacke T Labhart M V Srinivasan

While it is generally accepted that honeybees (Apis mellifera) are capable of using the pattern of polarized light in the sky to navigate to a food source, there is little or no direct behavioural evidence that they actually do so. We have examined whether bees can be trained to find their way through a maze composed of four interconnected tunnels, by using directional information provided by p...

Journal: :Dong wu xue yan jiu = Zoological research 2014
Yan-Mei Chen Yu Fu Jing He Jian-Hong Wang

In learning and memory studies on honeybees (Apis mellifera), cold-induced narcosis has been widely used to temporarily immobilize honeybees. In this study, we investigated the effects of cold narcosis on the associative memories in honeybees by using the proboscis extension response (PER) paradigm. Severe impairments in memory acquisition was found when cold narcosis was performed 30 min, inst...

Journal: :The Journal of experimental biology 2010
Ming-Xian Yang Ken Tan Sarah E Radloff Mananya Phiancharoen H Randall Hepburn

Comb building in mixed-species colonies of Apis cerana and Apis mellifera was studied. Two types of cell-size foundation were made from the waxes of these species and inserted into mixed colonies headed either by an A. cerana or an A. mellifera queen. The colonies did not discriminate between the waxes but the A. cerana cell-size foundation was modified during comb building by the workers of bo...

Journal: :The American naturalist 2014
Martin H Kärcher Francis L W Ratnieks

Worker honeybees, Apis mellifera, police each other's reproduction by killing worker-laid eggs. Previous experiments demonstrated that worker policing is effective, killing most (∼98%) worker-laid eggs. However, many queen-laid eggs were also killed (∼50%) suggesting that effective policing may have high costs. In these previous experiments, eggs were transferred using forceps into test cells, ...

2012
Arjun Guha Benjamin Lerner Shriram Krishnamurthi

Modern Web applications use several APIs to build rich features. For example, the W3C Geolocation API provides access to a user’s physical location for location-based personalization, Facebook Connect provides a single sign-on service and access to a user’s social graph, Local Storage is a per-domain cache that enables offline access, and the Google Maps API allows applications to embed customi...

Journal: :Social media and society 2022

Researchers, policymakers, and competition regulation authorities worldwide recognize the utility of application programming interfaces (APIs) in powering digital economy driving datafication platformization processes. However, it remains unclear how APIs leading social media relate to platform governance this relationship evolved. This article traces evolution Facebook’s APIs, which evolved fr...

Journal: :Bulletin of mathematical biology 2011
M Wilhelm M Chhetri J Rychtář O Rueppell

Queens of the honey bee, Apis mellifera (L.), exhibit extreme polyandry, mating with up to 45 different males (drones). This increases the genetic diversity of their colonies, and consequently their fitness. After copulation, drones leave a mating sign in the genital opening of the queen which has been shown to promote additional mating of the queen. On one hand, this signing behavior is benefi...

2017
Kai Xu Qingsheng Niu Huiting Zhao Yali Du Yusuo Jiang

[This corrects the article DOI: 10.1371/journal.pone.0179922.].

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