Der Wassergehalt des von den Pflanzen produzierten Nektars kann variieren. Um seine Konservierung in den Waben zu gewährleisten, darf er nicht gären. Deshalb wird er von den Bienen in Honig umgewandelt, indem sie seinen Wassergehalt senken und folglich den Zuckergehalt erhöhen. Dies verhindert die Entwicklung der Mikroorganismen. In der Dunkelheit des Bienenstocks ist es schwierig, den Herstellungsprozess des Honigs zu beobachten. Aus diesem Grund ist er auch nur wenig erforscht. Um die Umwandlung von Nektar in Honig zu untersuchen, haben wir die Technik der Tomographie eingesetzt. Sie ermöglicht es, den Zuckergehalt des eingelagerten Nektars sehr präzise zu messen, ohne den Bienenstock öffnen zu müssen und das Bienenvolk zu stören.
Lukas Jeker
Ecotoxicologist - Scientific Associate
Research Group
- 22.00.17.05 Honey Bees
Downloads
Agroscope-ID: 11571 Sending by e-mail
Lukas Jeker
Lukas Jeker
Projects
- 22.05.12.03.01
- 22.06.17.05.01
- 22.14.12.03.02
Publications
Lukas Jeker
Activities
Evaluation and approval of plant protection product and agrochemical dossiers regarding bee safety. Developing of new regulatory test methods (international ring-test) with honey bees, bumble bees and solitary bees. Representing Switzerland at international meetings (EFSA, OECD, ICPPR and SETAC)
Further Information
My name is Lukas Jeker, I am married and have two children a daughter (10) and a son (7).
I am Swiss and live in a small village called Duggingen close to Basel.
Background:
I was working for 12 years as research technician, 10 years as study director and team leader (in the field of terrestrial ecotoxicology) in R&D agrochemical companies (i.e. Ciba Geigy, Novartis and Syngenta) and different CRO`s (i.e. RCC, Harlan and IES Ltd.). My proficiency was conducting efficacy, effect and residue studies, lower and higher tier regulatory studies with NTA`s, NTP`s and bees under GLP.
As an educated beekeeper I became specialized in the field of regulatory studies with bees.
I am a member and expert of international panels and working groups (i.e. OECD, ICPPR and AG Bienenschutz). I am actively participating on international ring tests (i.e. method development of honeybee larvae, bumble bee and solitary bee laboratory tests).
The last two years I was working at Dr. Knoell Consult Switzerland where I was conducting risk assessments of PPP on bees and non-target arthropods, registration of agrochemicals according to the European, national and global regulatory framework. Review and evaluation of toxicological studies and publications, data gap analysis. Last but not least, familiarising with the new EFSA bee guidance document.
Hobbies:
Mountain biking, hiking, skiing and snowboarding
