Bee sensors take flight to help farmers / Etudier le déplacement des abeilles grâce à des puces électroniques

Thousands of honey bees in Australia are being fitted with tiny sensors as part of a world-first research program to monitor the insects and their environment using a technique known as 'swarm sensing'.

Author: CSIRO's Media Centre, 15 January 2014 - photos: CSIRO

The research is being led by CSIRO and aims to improve honey bee pollination and productivity on farms as well as help understand the drivers of bee Colony Collapse Disorder (CCD), a condition decimating honey bee populations worldwide.

Up to 5 000 sensors, measuring 2.5mm x 2.5 mm are being fitted to the backs of the bees in Hobart, Tasmania, before being released into the wild. It's the first time such large numbers of insects have been used for environmental monitoring.

"Honey bees play a vital role in the landscape through a free pollination service for agriculture, which various crops rely on to increase yields. A recent CSIRO study showed bee pollination in Faba beans can lead to a productivity increase of 17 per cent," CSIRO science leader Dr Paulo de Souza, who leads the swarm sensing project, said.

"Around one third of the food we eat relies on pollination, but honey bee populations around the world are crashing because of the dreaded Varroa mite and Colony Collapse Disorder. Thankfully, Australia is currently free from both of those threats."

The research will also look at the impacts of agricultural pesticides on honey bees by monitoring insects that feed at sites with trace amounts of commonly used chemicals.

"Using this technology, we aim to understand the bee’s relationship with its environment. This should help us understand optimal productivity conditions as well as further our knowledge of the cause of colony collapse disorder," Dr de Souza said.

The sensors are tiny Radio Frequency Identification sensors that work in a similar way to a vehicle's e-tag, recording when the insect passes a particular checkpoint. The information is then sent remotely to a central location where researchers can use the signals from the 5 000 sensors to build a comprehensive three dimensional model and visualise how these insects move through the landscape.

"Bees are social insects that return to the same point and operate on a very predictable schedule. Any change in their behaviour indicates a change in their environment. If we can model their movements, we'll be able to recognise very quickly when their activity shows variation and identify the cause. This will help us understand how to maximise their productivity as well as monitor for any biosecurity risks," Dr de Souza said.

Understanding bee behaviour will give farmers and fruit growers improved management knowledge enabling them to increase the benefit received from this free pollination service. It will also help them to gain and maintain access to markets through improving the way we monitor for pests.

"We're working with the University of Tasmania, Tasmanian Beekeepers Association, local beekeepers in Hobart and fruit growers around the state to trial the technology. Many growers rely on wild bees or the beekeepers to provide them with pollinators so they can improve their crops each year. Understanding optimal conditions for these insects will improve this process," Dr de Souza said.

You can read more about this here.

En français - Un article de Thierry Lucas, 19 janvier 2014, l'Usine Digitale

Des abeilles et des puces

Les Australiens placent 5000 abeilles sous surveillance, en collant sur leur dos une étiquette RFID, qui permet de pister leurs déplacements dans la nature. Menacées par le Varroa, acarien parasite, et par le syndrome d’effondrement des colonies d’abeilles (en Europe et aux Etats-Unis), les abeilles jouent un rôle majeur dans la pollinisation, et donc dans la culture de nombreuses plantes.

Il faut commencer par la refroidir un peu : placée en hibernation pour une courte période, l’abeille se tient tranquille et les chercheurs en profitent pour lui fixer sur le dos, par collage, une petite puce : une étiquette radio-fréquence de 2,5 mm de côté. Réveillée après quelques minutes, l’abeille est relâchée dans la nature, et peut reprendre ses occupations habituelles, en particulier la pollinisation, processus essentiel dans nombre de cultures : arbres fruitiers, oignons, concombres, coton, arachide, melon...

Les chercheurs australiens du Csiro (Commonwealth Scientific and Industrial Research Organisation) ont entrepris cette vaste entreprise de suivi des insectes – la plus importante à ce jour – afin de mieux comprendre l’interaction des abeilles avec leur environnement (voir la vidéo). Le passage d’un insecte à un check point (l’abeille suit des itinéraires très balisés) est enregistré et les données collectées servent à construire un modèle des mouvements des abeilles.

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