Change search
ReferencesLink to record
Permanent link

Direct link
The antihistamine hydroxyzine and Odonata: Bioaccumulation and effects on predator-prey interactions between dragonfly and damselfly larvae
Umeå University, Faculty of Science and Technology, Department of Ecology and Environmental Sciences.
2014 (English)Independent thesis Basic level (degree of Bachelor), 10 credits / 15 HE creditsStudent thesis
Abstract [en]

Through wastewater entering aquatic environments, aquatic insects are continuously exposed to pharmaceuticals including neurologically active antihistamines. The antihistamine hydroxyzine has previously been found to lower activity in damselflies and to reach 2000 times the concentration of surrounding water in damselfly tissue. The purpose of this short-term exposure study was to investigate if hydroxyzine also bioaccumulates in dragonflies and if dilute hydroxyzine (362 ± 50, mean ng/l ± SD) have effects on predator-prey interactions between dragonfly Aeshna grandis and damselfly Coenagrion hastulatum larvae, i.e. number of attacks and predation success. Predators and prey were captured and exposed during one, three or five days (with controls) before taking part in predation experiments; Dragonflies were put in separate containers with six damselflies, they were video recorded and attacks and predated damselflies noted during four hours. Tissue concentrations of hydroxyzine were analyzed from all dragonflies and a subsample of the damselflies showing a mean bioconcentration factor (BCF) of 27 and 7 respectively, surprisingly much lower than previous research. There was no difference in attack rate or predation efficiency between controls and exposed dragonflies. However, dragonflies exposed for five days were found to attack more and capture more prey than dragonflies exposed for one day, a change that was not seen in the controls. This confounding factor motivates further studies to clarify if hydroxyzine after a period of exposure can have a sublethal effect altering foraging and/or predator avoidance traits with the net result of increased predation success for dragonflies in the predator-prey interaction between dragonflies and damselflies.

Place, publisher, year, edition, pages
2014. , 13 p.
Keyword [en]
Aquatic insects Odonata predator-prey bioconcentration antihistamines
National Category
Biological Sciences
URN: urn:nbn:se:umu:diva-86388OAI: diva2:698752
Educational program
Bachelor of Science in Biology and Earthscience
Available from: 2014-02-25 Created: 2014-02-25 Last updated: 2014-02-25Bibliographically approved

Open Access in DiVA

Bomark_Examensarbete(438 kB)360 downloads
File information
File name FULLTEXT01.pdfFile size 438 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Department of Ecology and Environmental Sciences
Biological Sciences

Search outside of DiVA

GoogleGoogle Scholar
Total: 360 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 325 hits
ReferencesLink to record
Permanent link

Direct link