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Anna-Sara Krång

Postdoctoral fellow

 

040-41 53 00

070-437 97 65

anna-sara.krang@kmf.gu.se

akrang@ice.mpg.de

 

 

 

 

Education

PhD in Marine Ecology, Göteborg University, 2006.

MSc in Biology with a major in Marine Biology, Göteborg University, 1999.

 

Research

Current project: Olfactory function and adaptations in terrestrial crustaceans. Postdoctoral fellowship at Max Planck Inst. for Chemical Ecology, Dept. of  Evolutionary Neuroethology, Jena , Germany 2007, postdoctoral fellowship Formas 2008.

 

Within anomuran land crabs (Coenobitidae) there are various degrees of terrestriality, but all species have retained marine larval stages. The ability to recognize and discriminate chemical cues in the environment is essential for most animals, and thus a successful transition from sea to land calls for dramatically new demands on the chemosensory system, where stimulus changes from mainly water-soluble molecules to hydrophobic, volatile chemical cues carried by the air. Hence, these land crabs represent an excellent opportunity to investigate the effects of the transition from sea to land on the olfactory system. Previous field and laboratory studies show that land crabs do make use of their olfactory system on land and seem to have quite sophisticated olfactory abilities for distant chemoreception. Also new neuroanatomical studies indicate that the coenobitids have superb olfactory processing and discrimination capacities.

 

The main objective of my research project is to explore the seemingly extraordinary olfactory abilities of the Coenobitidae and to understand how they have evolved as adaptations to the terrestrial environment. In a highly interdisciplinary approach, behavioural investigations will be integrated with modern neurophysiological and optical imaging techniques, to identify which chemical substances induce biological activity and to study olfactory processing and discrimination capabilities of these land crabs. By comparing my findings with closely related marine crustaceans living under different ecological conditions and likewise with more ancient related insects inhabiting similar habitats, the project will generate new knowledge about how environmental and evolutionary forces dictate specific adaptations in olfactory systems, which will contribute to our general understanding of the olfactory sense.

 

Previous research experience

Impact of pollutants on chemically mediated behaviour in benthic crustaceans. PhD project mainly carried out at Kristineberg Marine Research station, Göteborg University. Project funded by Formas. My research focused on how environmental pollutants (heavy metals and organic contaminants) disrupt foraging and mating behaviour in marine crustaceans, by disturbing their ability to detect chemosensory cues and/or respond to chemical signals.

 

Effects of metal ions on abdominal muscle performance in the decapod Norway lobster, Nephrops norvegicus. MSc project carried out at the Department of Life Science, Glasgow University, and the Department of Marine Ecology, Göteborg University.

 

A comparative study between rice fields with and without fish in southern Vietnam, in considerations of environmental and economical aspects. Minor Field Study project financed by SIDA, 1996.

 

Publications

Krång, A-S. (2007). Naphthalene disrupts pheromone induced mate search in the amphipod Corophium volutator (Pallas). Aquatic Toxicology 85: 9-18.

 

Krång, A-S. & Dahlström, M. (2006). Effects of a candidate antifouling compound (medetomidine) on pheromone induced mate search in the amphipod Corophium volutator. Marine Pollution Bulletin 52: 1776-1783.

 

Krång, A-S. & Ekerholm, M. (2006). Copper reduced mating behaviour in male shore crabs (Carcinus maenas (L.)). Aquatic Toxicology 80: 60-69.

 

Krång, A-S. & Rosenqvist, G. (2006). Effects of manganese on chemically induced food search behaviour of the Norway lobster, Nephrops norvegicus (L.). Aquatic Toxicology 78: 284-291.

 

Krång, A-S. (2006). Impact of pollutants on chemically mediated behaviour in benthic crustaceans. PhD Thesis, Department of Marine Ecology, Göteborg University, Sweden.

 

Krång, A-S. & Baden, S.P. (2004). The ability of the amphipod Corophium volutator (Pallas) to follow chemical signals from con-specifics. Journal of Experimental Marine Biology and Ecology 310: 195-206.

 

Holmes, J.M., Gräns1, A-S., Neil, D.M. & Baden, S.P. (1999). The effects of the metal ions Mn2+ and Co2+ on muscle contraction in the Norway lobster, Nephrops norvegicus (L.). Journal of Comparative Physiology B. 169: 402-410.

 

Krång, A-S. & Ekerholm, M. Copper reduced feeding behaviour in the shore crabs (Carcinus maenas (L.)). In prep.

 

 

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© Chemical Ecology Group, Updated 2009-03-30