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Functional genomics resources for the North Atlantic copepod, Calanus finmarchicus: EST database and physiological

Petra H Lenz¹, Ebru Unal, R Patrick Hassett

¹Békésy Laboratory of Neurobiology, Pacific Biosciences Research Center, University of Hawaii at Manoa, Honolulu, HI 96822, USA. petra@pbrc.hawaii.edu

Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics

|January 27, 2012

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A new microarray for Calanus finmarchicus helps study its physiological ecology. This tool reveals how the keystone copepod responds to environmental changes like food availability and lipid storage.

Area of Science:

Marine Biology
Molecular Ecology
Genomics

Background:

Calanus finmarchicus is a keystone species in the North Atlantic.
Recent shifts in its geographic distribution necessitate understanding its physiological responses to environmental cues.
Molecular techniques offer novel insights into these physiological adaptations.

Purpose of the Study:

To develop a microarray for high-throughput analysis of C. finmarchicus physiological ecology.
To identify gene expression patterns related to environmental factors.

Main Methods:

Generated an EST database from adult and sub-adult C. finmarchicus.
Developed 995 unique oligomer probes for targeted gene expression analysis.
Utilized microarray to compare gene expression in response to varying food concentrations and lipid storage levels.

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Main Results:

Identified differentially expressed transcripts in response to food concentration and lipid storage.
Observed limited overlap in up-regulated genes between low-food and lipid-poor conditions.
Found no overlap in down-regulated genes between the two experimental conditions.

Conclusions:

The developed microarray is a valuable tool for studying C. finmarchicus physiology.
Gene expression responses to food availability and lipid storage are distinct.
Further research can elucidate specific molecular mechanisms underlying C. finmarchicus adaptation.